54 files changed, 4013 insertions, 4534 deletions

diff --git a/spec/outputs/5.1/attrib.lua b/spec/outputs/5.1/attrib.lua
index a9f12e3..af3f6cc 100644
--- a/spec/outputs/5.1/attrib.lua
+++ b/spec/outputs/5.1/attrib.lua
@@ -25,20 +25,16 @@ end
 do
         local a = f()
         local b, c, d
-        do
-                local _obj_0, _obj_1 = f1()
-                b, c = _obj_0[1], _obj_0[2]
-                d = _obj_1[1]
-        end
+        local _obj_0, _obj_1 = f1()
+        b, c = _obj_0[1], _obj_0[2]
+        d = _obj_1[1]
 end
 do
         local a, b, c, d
-        do
-                local _obj_0, _obj_1, _obj_2 = f()
-                a = _obj_0
-                b, c = _obj_1[1], _obj_1[2]
-                d = _obj_2[1]
-        end
+        local _obj_0, _obj_1, _obj_2 = f()
+        a = _obj_0
+        b, c = _obj_1[1], _obj_1[2]
+        d = _obj_2[1]
 end
 do
         local a, b
diff --git a/spec/outputs/5.1/loops.lua b/spec/outputs/5.1/loops.lua
index 6f0d072..cc019e0 100644
--- a/spec/outputs/5.1/loops.lua
+++ b/spec/outputs/5.1/loops.lua
@@ -390,20 +390,18 @@ do
                                 local _cond_0 = false
                                 local _continue_1 = false
                                 repeat
-                                        do
-                                                local _with_0 = tb
-                                                if _with_0 ~= nil then
-                                                        _with_0.a = 1
-                                                        if _with_0.b then
-                                                                _cond_0 = true
-                                                                _continue_1 = true
+                                        local _with_0 = tb
+                                        if _with_0 ~= nil then
+                                                _with_0.a = 1
+                                                if _with_0.b then
+                                                        _cond_0 = true
+                                                        _continue_1 = true
+                                                        break
+                                                end
+                                                do
+                                                        if _with_0.c then
                                                                 break
                                                         end
-                                                        do
-                                                                if _with_0.c then
-                                                                        break
-                                                                end
-                                                        end
                                                 end
                                         end
                                         _cond_0 = true
diff --git a/spec/outputs/ambiguous.lua b/spec/outputs/ambiguous.lua
index 3da6f14..3c82a03 100644
--- a/spec/outputs/ambiguous.lua
+++ b/spec/outputs/ambiguous.lua
@@ -13,11 +13,17 @@ a, b = c, d;
 (d(a))(c)
 for i = 1, 10 do
         a = function() end
-        (print)(1)
-        a = f;
-        (print)(2)
+        do
+                (print)(1)
+        end
+        a = f
+        do
+                (print)(2)
+        end
         if cond then
-                (print)(3)
+                do
+                        (print)(3)
+                end
         end
         ::abc::;
         (print)(4)
@@ -40,7 +46,9 @@ do
         end)
 end
 do
-        print(123)
+        do
+                print(123)
+        end
 end
 do
         f({
@@ -97,18 +105,16 @@ do
                 nums = _accum_0
         end
         local objects
-        do
-                local _accum_0 = { }
-                local _len_0 = 1
-                local _list_0 = items
-                for _index_0 = 1, #_list_0 do
-                        local item = _list_0[_index_0]
-                        _accum_0[_len_0] = {
-                                name = item
-                        }
-                        _len_0 = _len_0 + 1
-                end
-                objects = _accum_0
+        local _accum_0 = { }
+        local _len_0 = 1
+        local _list_0 = items
+        for _index_0 = 1, #_list_0 do
+                local item = _list_0[_index_0]
+                _accum_0[_len_0] = {
+                        name = item
+                }
+                _len_0 = _len_0 + 1
         end
+        objects = _accum_0
 end
 return nil
diff --git a/spec/outputs/assign.lua b/spec/outputs/assign.lua
index 8bf7b35..61b0843 100644
--- a/spec/outputs/assign.lua
+++ b/spec/outputs/assign.lua
@@ -72,15 +72,11 @@ return _(function()
         do
                 local a
                 if x then
-                        do
-                                local _exp_0 = y
-                                if 1 == _exp_0 then
-                                        do
-                                                local _obj_0, _obj_1 = f()
-                                                b[#b + 1] = _obj_1
-                                                a = _obj_0
-                                        end
-                                end
+                        local _exp_0 = y
+                        if 1 == _exp_0 then
+                                local _obj_0, _obj_1 = f()
+                                b[#b + 1] = _obj_1
+                                a = _obj_0
                         end
                 end
         end
@@ -88,11 +84,9 @@ return _(function()
                 local a
                 local b
                 if x then
-                        do
-                                local _obj_0, _obj_1 = f()
-                                a = _obj_0
-                                b = _obj_1[1]
-                        end
+                        local _obj_0, _obj_1 = f()
+                        a = _obj_0
+                        b = _obj_1[1]
                 else
                         a = 123
                         b = tb[1]
@@ -101,33 +95,25 @@ return _(function()
         do
                 local a, c
                 if x then
-                        do
-                                local _exp_0 = y
-                                if 1 == _exp_0 then
-                                        do
-                                                local _obj_0, _obj_1, _obj_2, _obj_3 = f()
-                                                b[#b + 1] = _obj_1
-                                                a, c, getmetatable(d).__add = _obj_0, _obj_2, _obj_3
-                                        end
-                                end
+                        local _exp_0 = y
+                        if 1 == _exp_0 then
+                                local _obj_0, _obj_1, _obj_2, _obj_3 = f()
+                                b[#b + 1] = _obj_1
+                                a, c, getmetatable(d).__add = _obj_0, _obj_2, _obj_3
                         end
                 elseif x2 then
                         if y2 then
-                                do
-                                        local _obj_0, _obj_1, _obj_2, _obj_3 = f1()
-                                        b[#b + 1] = _obj_1
-                                        a, c, getmetatable(d).__add = _obj_0, _obj_2, _obj_3
-                                end
+                                local _obj_0, _obj_1, _obj_2, _obj_3 = f1()
+                                b[#b + 1] = _obj_1
+                                a, c, getmetatable(d).__add = _obj_0, _obj_2, _obj_3
                         end
                 else
                         print("hello")
                         do
                                 print(123)
-                                do
-                                        local _obj_0, _obj_1, _obj_2 = f2()
-                                        b[#b + 1] = _obj_0
-                                        a, c, getmetatable(d).__add = 1, _obj_1, _obj_2
-                                end
+                                local _obj_0, _obj_1, _obj_2 = f2()
+                                b[#b + 1] = _obj_0
+                                a, c, getmetatable(d).__add = 1, _obj_1, _obj_2
                         end
                 end
         end
diff --git a/spec/outputs/attrib.lua b/spec/outputs/attrib.lua
index 07fc165..f6b0784 100644
--- a/spec/outputs/attrib.lua
+++ b/spec/outputs/attrib.lua
@@ -14,20 +14,16 @@ end
 do
         local a <const> = f()
         local b, c, d
-        do
-                local _obj_0, _obj_1 = f1()
-                b, c = _obj_0[1], _obj_0[2]
-                d = _obj_1[1]
-        end
+        local _obj_0, _obj_1 = f1()
+        b, c = _obj_0[1], _obj_0[2]
+        d = _obj_1[1]
 end
 do
         local a, b, c, d
-        do
-                local _obj_0, _obj_1, _obj_2 = f()
-                a = _obj_0
-                b, c = _obj_1[1], _obj_1[2]
-                d = _obj_2[1]
-        end
+        local _obj_0, _obj_1, _obj_2 = f()
+        a = _obj_0
+        b, c = _obj_1[1], _obj_1[2]
+        d = _obj_2[1]
 end
 do
         local a, b
diff --git a/spec/outputs/backcall.lua b/spec/outputs/backcall.lua
index b065388..38e5754 100644
--- a/spec/outputs/backcall.lua
+++ b/spec/outputs/backcall.lua
@@ -31,19 +31,17 @@ do
         end)())
 end
 do
-        do
-                local _obj_0 = http
-                if _obj_0 ~= nil then
-                        _obj_0.get("ajaxtest", function(data)
-                                body[".result"]:html(data)
-                                return http.post("ajaxprocess", data, function(processed)
-                                        body[".result"]:append(processed)
-                                        return setTimeout(1000, function()
-                                                return print("done")
-                                        end)
+        local _obj_0 = http
+        if _obj_0 ~= nil then
+                _obj_0.get("ajaxtest", function(data)
+                        body[".result"]:html(data)
+                        return http.post("ajaxprocess", data, function(processed)
+                                body[".result"]:append(processed)
+                                return setTimeout(1000, function()
+                                        return print("done")
                                 end)
                         end)
-                end
+                end)
         end
 end
 do
diff --git a/spec/outputs/bubbling.lua b/spec/outputs/bubbling.lua
index 7cb93c7..69f5f6b 100644
--- a/spec/outputs/bubbling.lua
+++ b/spec/outputs/bubbling.lua
@@ -109,15 +109,13 @@ _ = function(...)
                 a = _accum_0
         end
         local b
-        do
-                local _accum_0 = { }
-                local _len_0 = 1
-                for i = 1, 10 do
-                        _accum_0[_len_0] = function(...)
-                                return print(...)
-                        end
-                        _len_0 = _len_0 + 1
+        local _accum_0 = { }
+        local _len_0 = 1
+        for i = 1, 10 do
+                _accum_0[_len_0] = function(...)
+                        return print(...)
                 end
-                b = _accum_0
+                _len_0 = _len_0 + 1
         end
+        b = _accum_0
 end
diff --git a/spec/outputs/class.lua b/spec/outputs/class.lua
index d13b738..442ff4b 100644
--- a/spec/outputs/class.lua
+++ b/spec/outputs/class.lua
@@ -496,30 +496,28 @@ print("hello")
 local yyy
 yyy = function()
         local Cool
-        do
-                local _class_0
-                local _base_0 = { }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
-                end
-                _class_0 = setmetatable({
-                        __init = function() end,
-                        __base = _base_0,
-                        __name = "Cool"
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                local self = _class_0;
-                _ = nil
-                Cool = _class_0
-                return _class_0
+        local _class_0
+        local _base_0 = { }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
         end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "Cool"
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        local self = _class_0;
+        _ = nil
+        Cool = _class_0
+        return _class_0
 end
 do
         local _class_0
diff --git a/spec/outputs/codes_from_doc.lua b/spec/outputs/codes_from_doc.lua
index 1bcc587..1f593db 100644
--- a/spec/outputs/codes_from_doc.lua
+++ b/spec/outputs/codes_from_doc.lua
@@ -46,13 +46,18 @@ _module_0["🌛"] = _ud83c_udf1b
 return _module_0
 local area = 6.2831853071796 * 5
 print('hello world')
-assert(item ~= nil)
+do
+        assert(item ~= nil)
+end
 local value = item
 if (f1() and f2() and f3()) then
         print("OK")
 end
+do
+        local funcA
+        funcA = function() end
+end
 local funcA
-funcA = function() end
 funcA = function()
         return "assign the Yue defined variable"
 end
@@ -146,28 +151,26 @@ local b = {
         y = 1
 }
 local merge
-do
-        local _tab_0 = { }
-        local _idx_0 = 1
-        for _key_0, _value_0 in pairs(a) do
-                if _idx_0 == _key_0 then
-                        _tab_0[#_tab_0 + 1] = _value_0
-                        _idx_0 = _idx_0 + 1
-                else
-                        _tab_0[_key_0] = _value_0
-                end
+local _tab_0 = { }
+local _idx_0 = 1
+for _key_0, _value_0 in pairs(a) do
+        if _idx_0 == _key_0 then
+                _tab_0[#_tab_0 + 1] = _value_0
+                _idx_0 = _idx_0 + 1
+        else
+                _tab_0[_key_0] = _value_0
         end
-        local _idx_1 = 1
-        for _key_0, _value_0 in pairs(b) do
-                if _idx_1 == _key_0 then
-                        _tab_0[#_tab_0 + 1] = _value_0
-                        _idx_1 = _idx_1 + 1
-                else
-                        _tab_0[_key_0] = _value_0
-                end
+end
+local _idx_1 = 1
+for _key_0, _value_0 in pairs(b) do
+        if _idx_1 == _key_0 then
+                _tab_0[#_tab_0 + 1] = _value_0
+                _idx_1 = _idx_1 + 1
+        else
+                _tab_0[_key_0] = _value_0
         end
-        merge = _tab_0
 end
+merge = _tab_0
 local mt = { }
 local add
 add = function(self, right)
@@ -259,12 +262,10 @@ end
 if print and (x ~= nil) then
         print(x)
 end
-do
-        local _with_0 = io.open("test.txt", "w")
-        if _with_0 ~= nil then
-                _with_0:write("hello")
-                _with_0:close()
-        end
+local _with_0 = io.open("test.txt", "w")
+if _with_0 ~= nil then
+        _with_0:write("hello")
+        _with_0:close()
 end
 print("hello")
 print(1, 2)
@@ -341,10 +342,8 @@ do
                 x, y, z = _obj_0.x, _obj_0.y, _obj_0.z
         end
         local a, b, c
-        do
-                local _obj_0 = require('module')
-                a, b, c = _obj_0.a, _obj_0.b, _obj_0.c
-        end
+        local _obj_0 = require('module')
+        a, b, c = _obj_0.a, _obj_0.b, _obj_0.c
 end
 do
         local module = require('module')
@@ -383,29 +382,27 @@ y = function()
 end
 _module_0["y"] = y
 local Something
-do
-        local _class_0
-        local _base_0 = {
-                umm = "cool"
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Something"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Something = _class_0
+local _class_0
+local _base_0 = {
+        umm = "cool"
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Something"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Something = _class_0
 _module_0["Something"] = Something
 return _module_0
 local _module_0 = { }
@@ -436,11 +433,9 @@ if this then
 else
         _module_0[#_module_0 + 1] = 456
 end
-do
-        local _with_0 = tmp
-        local j = 2000
-        _module_0[#_module_0 + 1] = _with_0
-end
+local _with_0 = tmp
+local j = 2000
+_module_0[#_module_0 + 1] = _with_0
 return _module_0
 local _module_0 = nil
 _module_0 = function()
@@ -577,25 +572,19 @@ for _index_0 = 1, #tuples do
         local left, right = _des_0[1], _des_0[2]
         print(left, right)
 end
-do
-        local user = database.find_user("moon")
-        if user then
-                print(user.name)
-        end
+local user = database.find_user("moon")
+if user then
+        print(user.name)
 end
-do
-        local hello = os.getenv("hello")
-        if hello then
-                print("You have hello", hello)
+local hello = os.getenv("hello")
+if hello then
+        print("You have hello", hello)
+else
+        local world = os.getenv("world")
+        if world then
+                print("you have world", world)
         else
-                do
-                        local world = os.getenv("world")
-                        if world then
-                                print("you have world", world)
-                        else
-                                print("nothing :(")
-                        end
-                end
+                print("nothing :(")
         end
 end
 do
@@ -858,40 +847,34 @@ local items = {
         4
 }
 local doubled
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i, item in ipairs(items) do
-                _accum_0[_len_0] = item * 2
-                _len_0 = _len_0 + 1
-        end
-        doubled = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+for i, item in ipairs(items) do
+        _accum_0[_len_0] = item * 2
+        _len_0 = _len_0 + 1
 end
+doubled = _accum_0
 local iter = ipairs(items)
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i, item in iter do
-                if i > 1 and i < 3 then
-                        _accum_0[_len_0] = item
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for i, item in iter do
+        if i > 1 and i < 3 then
+                _accum_0[_len_0] = item
+                _len_0 = _len_0 + 1
         end
-        slice = _accum_0
 end
+slice = _accum_0
 local doubled
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 1, #_list_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item * 2
-                _len_0 = _len_0 + 1
-        end
-        doubled = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item * 2
+        _len_0 = _len_0 + 1
 end
+doubled = _accum_0
 local x_coords = {
         4,
         5,
@@ -904,57 +887,49 @@ local y_coords = {
         3
 }
 local points
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for _index_0 = 1, #x_coords do
-                local x = x_coords[_index_0]
-                for _index_1 = 1, #y_coords do
-                        local y = y_coords[_index_1]
-                        _accum_0[_len_0] = {
-                                x,
-                                y
-                        }
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for _index_0 = 1, #x_coords do
+        local x = x_coords[_index_0]
+        for _index_1 = 1, #y_coords do
+                local y = y_coords[_index_1]
+                _accum_0[_len_0] = {
+                        x,
+                        y
+                }
+                _len_0 = _len_0 + 1
         end
-        points = _accum_0
 end
+points = _accum_0
 local evens
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i = 1, 100 do
-                if i % 2 == 0 then
-                        _accum_0[_len_0] = i
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for i = 1, 100 do
+        if i % 2 == 0 then
+                _accum_0[_len_0] = i
+                _len_0 = _len_0 + 1
         end
-        evens = _accum_0
 end
+evens = _accum_0
 local thing = {
         color = "red",
         name = "fast",
         width = 123
 }
 local thing_copy
-do
-        local _tbl_0 = { }
-        for k, v in pairs(thing) do
-                _tbl_0[k] = v
-        end
-        thing_copy = _tbl_0
+local _tbl_0 = { }
+for k, v in pairs(thing) do
+        _tbl_0[k] = v
 end
+thing_copy = _tbl_0
 local no_color
-do
-        local _tbl_0 = { }
-        for k, v in pairs(thing) do
-                if k ~= "color" then
-                        _tbl_0[k] = v
-                end
+local _tbl_0 = { }
+for k, v in pairs(thing) do
+        if k ~= "color" then
+                _tbl_0[k] = v
         end
-        no_color = _tbl_0
 end
+no_color = _tbl_0
 local numbers = {
         1,
         2,
@@ -962,14 +937,12 @@ local numbers = {
         4
 }
 local sqrts
-do
-        local _tbl_0 = { }
-        for _index_0 = 1, #numbers do
-                local i = numbers[_index_0]
-                _tbl_0[i] = math.sqrt(i)
-        end
-        sqrts = _tbl_0
+local _tbl_0 = { }
+for _index_0 = 1, #numbers do
+        local i = numbers[_index_0]
+        _tbl_0[i] = math.sqrt(i)
 end
+sqrts = _tbl_0
 local tuples = {
         {
                 "hello",
@@ -981,52 +954,44 @@ local tuples = {
         }
 }
 local tbl
-do
-        local _tbl_0 = { }
-        for _index_0 = 1, #tuples do
-                local tuple = tuples[_index_0]
-                local _key_0, _val_0 = unpack(tuple)
-                _tbl_0[_key_0] = _val_0
-        end
-        tbl = _tbl_0
+local _tbl_0 = { }
+for _index_0 = 1, #tuples do
+        local tuple = tuples[_index_0]
+        local _key_0, _val_0 = unpack(tuple)
+        _tbl_0[_key_0] = _val_0
 end
+tbl = _tbl_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        local _max_0 = 5
-        for _index_0 = 1, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+local _max_0 = 5
+for _index_0 = 1, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 2, #_list_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 2, #_list_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 1, #_list_0, 2 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 1, #_list_0, 2 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 for i = 10, 20 do
         print(i)
 end
@@ -1036,13 +1001,11 @@ end
 for key, value in pairs(object) do
         print(key, value)
 end
-do
-        local _list_0 = items
-        local _max_0 = 4
-        for _index_0 = 2, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
-                local item = _list_0[_index_0]
-                print(item)
-        end
+local _list_0 = items
+local _max_0 = 4
+for _index_0 = 2, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
+        local item = _list_0[_index_0]
+        print(item)
 end
 local _list_0 = items
 for _index_0 = 1, #_list_0 do
@@ -1053,19 +1016,17 @@ for j = 1, 10, 3 do
         print(j)
 end
 local doubled_evens
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i = 1, 20 do
-                if i % 2 == 0 then
-                        _accum_0[_len_0] = i * 2
-                else
-                        _accum_0[_len_0] = i
-                end
-                _len_0 = _len_0 + 1
+local _accum_0 = { }
+local _len_0 = 1
+for i = 1, 20 do
+        if i % 2 == 0 then
+                _accum_0[_len_0] = i * 2
+        else
+                _accum_0[_len_0] = i
         end
-        doubled_evens = _accum_0
+        _len_0 = _len_0 + 1
 end
+doubled_evens = _accum_0
 local func_a
 func_a = function()
         for i = 1, 10 do
@@ -1123,20 +1084,18 @@ local my_numbers = {
         6
 }
 local odds
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for _index_0 = 1, #my_numbers do
-                local x = my_numbers[_index_0]
-                if x % 2 == 1 then
-                        goto _continue_0
-                end
-                _accum_0[_len_0] = x
-                _len_0 = _len_0 + 1
-                ::_continue_0::
+local _accum_0 = { }
+local _len_0 = 1
+for _index_0 = 1, #my_numbers do
+        local x = my_numbers[_index_0]
+        if x % 2 == 1 then
+                goto _continue_0
         end
-        odds = _accum_0
+        _accum_0[_len_0] = x
+        _len_0 = _len_0 + 1
+        ::_continue_0::
 end
+odds = _accum_0
 local have_coins = false
 if have_coins then
         print("Got coins")
@@ -1228,15 +1187,13 @@ else
         next_number = error("can't count that high!")
 end
 local msg
-do
-        local _exp_0 = math.random(1, 5)
-        if 1 == _exp_0 then
-                msg = "you are lucky"
-        elseif 2 == _exp_0 then
-                msg = "you are almost lucky"
-        else
-                msg = "not so lucky"
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        msg = "you are lucky"
+elseif 2 == _exp_0 then
+        msg = "you are almost lucky"
+else
+        msg = "not so lucky"
 end
 do
         local _exp_0 = math.random(1, 5)
@@ -1246,13 +1203,11 @@ do
                 print("not so lucky")
         end
 end
-do
-        local _exp_0 = math.random(1, 5)
-        if 1 == _exp_0 then
-                print("you are lucky")
-        else
-                print("not so lucky")
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        print("you are lucky")
+else
+        print("not so lucky")
 end
 local items = {
         {
@@ -1266,25 +1221,23 @@ local items = {
 }
 for _index_0 = 1, #items do
         local item = items[_index_0]
-        do
-                local _type_0 = type(item)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                local _match_0 = false
-                if _tab_0 then
-                        local x = item.x
-                        local y = item.y
-                        if x ~= nil and y ~= nil then
-                                _match_0 = true
-                                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
-                        end
+        local _type_0 = type(item)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        local _match_0 = false
+        if _tab_0 then
+                local x = item.x
+                local y = item.y
+                if x ~= nil and y ~= nil then
+                        _match_0 = true
+                        print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
                 end
-                if not _match_0 then
-                        if _tab_0 then
-                                local width = item.width
-                                local height = item.height
-                                if width ~= nil and height ~= nil then
-                                        print("size " .. tostring(width) .. ", " .. tostring(height))
-                                end
+        end
+        if not _match_0 then
+                if _tab_0 then
+                        local width = item.width
+                        local height = item.height
+                        if width ~= nil and height ~= nil then
+                                print("size " .. tostring(width) .. ", " .. tostring(height))
                         end
                 end
         end
@@ -1297,66 +1250,62 @@ end
 if y == nil then
         y = 200
 end
-do
-        local _type_0 = type(item)
-        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-        if _tab_0 then
-                do
-                        local _obj_0 = item.pos
-                        local _type_1 = type(_obj_0)
-                        if "table" == _type_1 or "userdata" == _type_1 then
-                                x = _obj_0.x
-                        end
-                end
-                do
-                        local _obj_0 = item.pos
-                        local _type_1 = type(_obj_0)
-                        if "table" == _type_1 or "userdata" == _type_1 then
-                                y = _obj_0.y
-                        end
-                end
-                if x == nil then
-                        x = 50
+local _type_0 = type(item)
+local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+if _tab_0 then
+        do
+                local _obj_0 = item.pos
+                local _type_1 = type(_obj_0)
+                if "table" == _type_1 or "userdata" == _type_1 then
+                        x = _obj_0.x
                 end
-                if y == nil then
-                        y = 200
+        end
+        do
+                local _obj_0 = item.pos
+                local _type_1 = type(_obj_0)
+                if "table" == _type_1 or "userdata" == _type_1 then
+                        y = _obj_0.y
                 end
-                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
         end
+        if x == nil then
+                x = 50
+        end
+        if y == nil then
+                y = 200
+        end
+        print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
 end
 local Inventory
-do
-        local _class_0
-        local _base_0 = {
-                add_item = function(self, name)
-                        if self.items[name] then
-                                local _obj_0 = self.items
-                                _obj_0[name] = _obj_0[name] + 1
-                        else
-                                self.items[name] = 1
-                        end
+local _class_0
+local _base_0 = {
+        add_item = function(self, name)
+                if self.items[name] then
+                        local _obj_0 = self.items
+                        _obj_0[name] = _obj_0[name] + 1
+                else
+                        self.items[name] = 1
                 end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
         end
-        _class_0 = setmetatable({
-                __init = function(self)
-                        self.items = { }
-                end,
-                __base = _base_0,
-                __name = "Inventory"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Inventory = _class_0
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function(self)
+                self.items = { }
+        end,
+        __base = _base_0,
+        __name = "Inventory"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Inventory = _class_0
 local inv = Inventory()
 inv:add_item("t-shirt")
 inv:add_item("pants")
@@ -1397,82 +1346,78 @@ for _index_0 = 1, #_list_0 do
         print(item)
 end
 local Person
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function(self)
+                self.clothes = { }
+        end,
+        __base = _base_0,
+        __name = "Person"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function(self)
-                        self.clothes = { }
-                end,
-                __base = _base_0,
-                __name = "Person"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Person = _class_0
-end
+})
+_base_0.__class = _class_0
+Person = _class_0
 local BackPack
-do
-        local _class_0
-        local _parent_0 = Inventory
-        local _base_0 = {
-                size = 10,
-                add_item = function(self, name)
-                        if #self.items > size then
-                                error("backpack is full")
-                        end
-                        return _class_0.__parent.__base.add_item(self, name)
-                end
-        }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
+local _class_0
+local _parent_0 = Inventory
+local _base_0 = {
+        size = 10,
+        add_item = function(self, name)
+                if #self.items > size then
+                        error("backpack is full")
                 end
+                return _class_0.__parent.__base.add_item(self, name)
         end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+}
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
         end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "BackPack",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "BackPack",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        BackPack = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+BackPack = _class_0
 local Shelf
 do
         local _class_0
@@ -1500,102 +1445,98 @@ do
         Shelf = _class_0
 end
 local Cupboard
-do
-        local _class_0
-        local _parent_0 = Shelf
-        local _base_0 = { }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
-                end
-        end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "Cupboard",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+local _class_0
+local _parent_0 = Shelf
+local _base_0 = { }
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
+        end
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "Cupboard",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        Cupboard = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+Cupboard = _class_0
 local MyClass
-do
-        local _class_0
-        local _parent_0 = ParentClass
-        local _base_0 = {
-                a_method = function(self)
-                        _class_0.__parent.__base.a_method(self, "hello", "world")
-                        _class_0.__parent.a_method(self, "hello", "world")
-                        _class_0.__parent.a_method(self, "hello", "world")
-                        return assert(_class_0.__parent == ParentClass)
-                end
-        }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
-                end
-        end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "MyClass",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+local _class_0
+local _parent_0 = ParentClass
+local _base_0 = {
+        a_method = function(self)
+                _class_0.__parent.__base.a_method(self, "hello", "world")
+                _class_0.__parent.a_method(self, "hello", "world")
+                _class_0.__parent.a_method(self, "hello", "world")
+                return assert(_class_0.__parent == ParentClass)
+        end
+}
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
+        end
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "MyClass",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        MyClass = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+MyClass = _class_0
 local b = BackPack()
 assert(b.__class == BackPack)
 print(BackPack.size)
@@ -1659,61 +1600,57 @@ Counter()
 print(Counter.count)
 self.__class:hello(1, 2, 3, 4)
 local Things
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Things"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Things"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        local self = _class_0;
-        self.class_var = "hello world"
-        Things = _class_0
-end
+})
+_base_0.__class = _class_0
+local self = _class_0;
+self.class_var = "hello world"
+Things = _class_0
 local MoreThings
-do
-        local _class_0
-        local secret, log
-        local _base_0 = {
-                some_method = function(self)
-                        return log("hello world: " .. secret)
-                end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local secret, log
+local _base_0 = {
+        some_method = function(self)
+                return log("hello world: " .. secret)
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "MoreThings"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        local self = _class_0;
-        secret = 123
-        log = function(msg)
-                return print("LOG:", msg)
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "MoreThings"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        MoreThings = _class_0
+})
+_base_0.__class = _class_0
+local self = _class_0;
+secret = 123
+log = function(msg)
+        return print("LOG:", msg)
 end
+MoreThings = _class_0
 assert(self == self)
 assert(self.__class == self.__class)
 local some_instance_method
@@ -1747,32 +1684,30 @@ do
         _base_0.__class = _class_0
         Something = _class_0
 end
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function(self, foo, bar, biz, baz)
+                self.foo = foo
+                self.bar = bar
+                self.__class.biz = biz
+                self.__class.baz = baz
+        end,
+        __base = _base_0,
+        __name = "Something"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function(self, foo, bar, biz, baz)
-                        self.foo = foo
-                        self.bar = bar
-                        self.__class.biz = biz
-                        self.__class.baz = baz
-                end,
-                __base = _base_0,
-                __name = "Something"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Something = _class_0
-end
+})
+_base_0.__class = _class_0
+Something = _class_0
 local new
 new = function(self, fieldA, fieldB)
         self.fieldA = fieldA
@@ -1783,33 +1718,31 @@ local obj = new({ }, 123, "abc")
 print(obj)
 local x
 local Bucket
-do
-        local _class_0
-        local _base_0 = {
-                drops = 0,
-                add_drop = function(self)
-                        self.drops = self.drops + 1
-                end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = {
+        drops = 0,
+        add_drop = function(self)
+                self.drops = self.drops + 1
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Bucket"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Bucket = _class_0
-        x = _class_0
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Bucket"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Bucket = _class_0
+x = _class_0
 local BigBucket
 do
         local _class_0
@@ -1861,27 +1794,25 @@ do
 end
 assert(Bucket.__name == "BigBucket")
 local x
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "x"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "x"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        x = _class_0
-end
+})
+_base_0.__class = _class_0
+x = _class_0
 local MyIndex = {
         __index = {
                 var = 1
@@ -1964,19 +1895,15 @@ end
 local y = Y()
 y:func()
 assert(y.__class.__parent ~= X)
-do
-        local _with_0 = Person()
-        _with_0.name = "Oswald"
-        _with_0:add_relative(my_dad)
-        _with_0:save()
-        print(_with_0.name)
-end
+local _with_0 = Person()
+_with_0.name = "Oswald"
+_with_0:add_relative(my_dad)
+_with_0:save()
+print(_with_0.name)
 local file
-do
-        local _with_0 = File("favorite_foods.txt")
-        _with_0:set_encoding("utf8")
-        file = _with_0
-end
+local _with_0 = File("favorite_foods.txt")
+_with_0:set_encoding("utf8")
+file = _with_0
 local create_person
 create_person = function(name, relatives)
         local _with_0 = Person()
@@ -1992,22 +1919,18 @@ local me = create_person("Leaf", {
         mother,
         sister
 })
+local str = "Hello"
+print("original:", str)
+print("upper:", str:upper())
+local _with_0 = tb
+_with_0[1] = 1
+print(_with_0[2])
 do
-        local str = "Hello"
-        print("original:", str)
-        print("upper:", str:upper())
-end
-do
-        local _with_0 = tb
-        _with_0[1] = 1
-        print(_with_0[2])
-        do
-                local _with_1 = _with_0[abc]
-                _with_1[3] = _with_1[2]:func()
-                _with_1["key-name"] = value
-        end
-        _with_0[#_with_0 + 1] = "abc"
+        local _with_1 = _with_0[abc]
+        _with_1[3] = _with_1[2]:func()
+        _with_1["key-name"] = value
 end
+_with_0[#_with_0 + 1] = "abc"
 do
         local var = "hello"
         print(var)
@@ -2124,13 +2047,18 @@ _module_0["🌛"] = _ud83c_udf1b
 return _module_0
 local area = 6.2831853071796 * 5
 print('hello world')
-assert(item ~= nil)
+do
+        assert(item ~= nil)
+end
 local value = item
 if (f1() and f2() and f3()) then
         print("OK")
 end
+do
+        local funcA
+        funcA = function() end
+end
 local funcA
-funcA = function() end
 funcA = function()
         return "assign the Yue defined variable"
 end
@@ -2224,28 +2152,26 @@ local b = {
         y = 1
 }
 local merge
-do
-        local _tab_0 = { }
-        local _idx_0 = 1
-        for _key_0, _value_0 in pairs(a) do
-                if _idx_0 == _key_0 then
-                        _tab_0[#_tab_0 + 1] = _value_0
-                        _idx_0 = _idx_0 + 1
-                else
-                        _tab_0[_key_0] = _value_0
-                end
+local _tab_0 = { }
+local _idx_0 = 1
+for _key_0, _value_0 in pairs(a) do
+        if _idx_0 == _key_0 then
+                _tab_0[#_tab_0 + 1] = _value_0
+                _idx_0 = _idx_0 + 1
+        else
+                _tab_0[_key_0] = _value_0
         end
-        local _idx_1 = 1
-        for _key_0, _value_0 in pairs(b) do
-                if _idx_1 == _key_0 then
-                        _tab_0[#_tab_0 + 1] = _value_0
-                        _idx_1 = _idx_1 + 1
-                else
-                        _tab_0[_key_0] = _value_0
-                end
+end
+local _idx_1 = 1
+for _key_0, _value_0 in pairs(b) do
+        if _idx_1 == _key_0 then
+                _tab_0[#_tab_0 + 1] = _value_0
+                _idx_1 = _idx_1 + 1
+        else
+                _tab_0[_key_0] = _value_0
         end
-        merge = _tab_0
 end
+merge = _tab_0
 local mt = { }
 local add
 add = function(self, right)
@@ -2337,12 +2263,10 @@ end
 if print and (x ~= nil) then
         print(x)
 end
-do
-        local _with_0 = io.open("test.txt", "w")
-        if _with_0 ~= nil then
-                _with_0:write("hello")
-                _with_0:close()
-        end
+local _with_0 = io.open("test.txt", "w")
+if _with_0 ~= nil then
+        _with_0:write("hello")
+        _with_0:close()
 end
 print("hello")
 print(1, 2)
@@ -2419,10 +2343,8 @@ do
                 x, y, z = _obj_0.x, _obj_0.y, _obj_0.z
         end
         local a, b, c
-        do
-                local _obj_0 = require('module')
-                a, b, c = _obj_0.a, _obj_0.b, _obj_0.c
-        end
+        local _obj_0 = require('module')
+        a, b, c = _obj_0.a, _obj_0.b, _obj_0.c
 end
 do
         local module = require('module')
@@ -2461,29 +2383,27 @@ y = function()
 end
 _module_0["y"] = y
 local Something
-do
-        local _class_0
-        local _base_0 = {
-                umm = "cool"
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Something"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Something = _class_0
+local _class_0
+local _base_0 = {
+        umm = "cool"
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Something"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Something = _class_0
 _module_0["Something"] = Something
 return _module_0
 local _module_0 = { }
@@ -2514,11 +2434,9 @@ if this then
 else
         _module_0[#_module_0 + 1] = 456
 end
-do
-        local _with_0 = tmp
-        local j = 2000
-        _module_0[#_module_0 + 1] = _with_0
-end
+local _with_0 = tmp
+local j = 2000
+_module_0[#_module_0 + 1] = _with_0
 return _module_0
 local _module_0 = nil
 _module_0 = function()
@@ -2655,25 +2573,19 @@ for _index_0 = 1, #tuples do
         local left, right = _des_0[1], _des_0[2]
         print(left, right)
 end
-do
-        local user = database.find_user("moon")
-        if user then
-                print(user.name)
-        end
+local user = database.find_user("moon")
+if user then
+        print(user.name)
 end
-do
-        local hello = os.getenv("hello")
-        if hello then
-                print("You have hello", hello)
+local hello = os.getenv("hello")
+if hello then
+        print("You have hello", hello)
+else
+        local world = os.getenv("world")
+        if world then
+                print("you have world", world)
         else
-                do
-                        local world = os.getenv("world")
-                        if world then
-                                print("you have world", world)
-                        else
-                                print("nothing :(")
-                        end
-                end
+                print("nothing :(")
         end
 end
 do
@@ -2936,40 +2848,34 @@ local items = {
         4
 }
 local doubled
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i, item in ipairs(items) do
-                _accum_0[_len_0] = item * 2
-                _len_0 = _len_0 + 1
-        end
-        doubled = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+for i, item in ipairs(items) do
+        _accum_0[_len_0] = item * 2
+        _len_0 = _len_0 + 1
 end
+doubled = _accum_0
 local iter = ipairs(items)
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i, item in iter do
-                if i > 1 and i < 3 then
-                        _accum_0[_len_0] = item
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for i, item in iter do
+        if i > 1 and i < 3 then
+                _accum_0[_len_0] = item
+                _len_0 = _len_0 + 1
         end
-        slice = _accum_0
 end
+slice = _accum_0
 local doubled
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 1, #_list_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item * 2
-                _len_0 = _len_0 + 1
-        end
-        doubled = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item * 2
+        _len_0 = _len_0 + 1
 end
+doubled = _accum_0
 local x_coords = {
         4,
         5,
@@ -2982,57 +2888,49 @@ local y_coords = {
         3
 }
 local points
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for _index_0 = 1, #x_coords do
-                local x = x_coords[_index_0]
-                for _index_1 = 1, #y_coords do
-                        local y = y_coords[_index_1]
-                        _accum_0[_len_0] = {
-                                x,
-                                y
-                        }
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for _index_0 = 1, #x_coords do
+        local x = x_coords[_index_0]
+        for _index_1 = 1, #y_coords do
+                local y = y_coords[_index_1]
+                _accum_0[_len_0] = {
+                        x,
+                        y
+                }
+                _len_0 = _len_0 + 1
         end
-        points = _accum_0
 end
+points = _accum_0
 local evens
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i = 1, 100 do
-                if i % 2 == 0 then
-                        _accum_0[_len_0] = i
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for i = 1, 100 do
+        if i % 2 == 0 then
+                _accum_0[_len_0] = i
+                _len_0 = _len_0 + 1
         end
-        evens = _accum_0
 end
+evens = _accum_0
 local thing = {
         color = "red",
         name = "fast",
         width = 123
 }
 local thing_copy
-do
-        local _tbl_0 = { }
-        for k, v in pairs(thing) do
-                _tbl_0[k] = v
-        end
-        thing_copy = _tbl_0
+local _tbl_0 = { }
+for k, v in pairs(thing) do
+        _tbl_0[k] = v
 end
+thing_copy = _tbl_0
 local no_color
-do
-        local _tbl_0 = { }
-        for k, v in pairs(thing) do
-                if k ~= "color" then
-                        _tbl_0[k] = v
-                end
+local _tbl_0 = { }
+for k, v in pairs(thing) do
+        if k ~= "color" then
+                _tbl_0[k] = v
         end
-        no_color = _tbl_0
 end
+no_color = _tbl_0
 local numbers = {
         1,
         2,
@@ -3040,14 +2938,12 @@ local numbers = {
         4
 }
 local sqrts
-do
-        local _tbl_0 = { }
-        for _index_0 = 1, #numbers do
-                local i = numbers[_index_0]
-                _tbl_0[i] = math.sqrt(i)
-        end
-        sqrts = _tbl_0
+local _tbl_0 = { }
+for _index_0 = 1, #numbers do
+        local i = numbers[_index_0]
+        _tbl_0[i] = math.sqrt(i)
 end
+sqrts = _tbl_0
 local tuples = {
         {
                 "hello",
@@ -3059,52 +2955,44 @@ local tuples = {
         }
 }
 local tbl
-do
-        local _tbl_0 = { }
-        for _index_0 = 1, #tuples do
-                local tuple = tuples[_index_0]
-                local _key_0, _val_0 = unpack(tuple)
-                _tbl_0[_key_0] = _val_0
-        end
-        tbl = _tbl_0
+local _tbl_0 = { }
+for _index_0 = 1, #tuples do
+        local tuple = tuples[_index_0]
+        local _key_0, _val_0 = unpack(tuple)
+        _tbl_0[_key_0] = _val_0
 end
+tbl = _tbl_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        local _max_0 = 5
-        for _index_0 = 1, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+local _max_0 = 5
+for _index_0 = 1, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 2, #_list_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 2, #_list_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 1, #_list_0, 2 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 1, #_list_0, 2 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 for i = 10, 20 do
         print(i)
 end
@@ -3114,13 +3002,11 @@ end
 for key, value in pairs(object) do
         print(key, value)
 end
-do
-        local _list_0 = items
-        local _max_0 = 4
-        for _index_0 = 2, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
-                local item = _list_0[_index_0]
-                print(item)
-        end
+local _list_0 = items
+local _max_0 = 4
+for _index_0 = 2, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
+        local item = _list_0[_index_0]
+        print(item)
 end
 local _list_0 = items
 for _index_0 = 1, #_list_0 do
@@ -3131,19 +3017,17 @@ for j = 1, 10, 3 do
         print(j)
 end
 local doubled_evens
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i = 1, 20 do
-                if i % 2 == 0 then
-                        _accum_0[_len_0] = i * 2
-                else
-                        _accum_0[_len_0] = i
-                end
-                _len_0 = _len_0 + 1
+local _accum_0 = { }
+local _len_0 = 1
+for i = 1, 20 do
+        if i % 2 == 0 then
+                _accum_0[_len_0] = i * 2
+        else
+                _accum_0[_len_0] = i
         end
-        doubled_evens = _accum_0
+        _len_0 = _len_0 + 1
 end
+doubled_evens = _accum_0
 local func_a
 func_a = function()
         for i = 1, 10 do
@@ -3201,20 +3085,18 @@ local my_numbers = {
         6
 }
 local odds
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for _index_0 = 1, #my_numbers do
-                local x = my_numbers[_index_0]
-                if x % 2 == 1 then
-                        goto _continue_0
-                end
-                _accum_0[_len_0] = x
-                _len_0 = _len_0 + 1
-                ::_continue_0::
+local _accum_0 = { }
+local _len_0 = 1
+for _index_0 = 1, #my_numbers do
+        local x = my_numbers[_index_0]
+        if x % 2 == 1 then
+                goto _continue_0
         end
-        odds = _accum_0
+        _accum_0[_len_0] = x
+        _len_0 = _len_0 + 1
+        ::_continue_0::
 end
+odds = _accum_0
 local have_coins = false
 if have_coins then
         print("Got coins")
@@ -3306,15 +3188,13 @@ else
         next_number = error("can't count that high!")
 end
 local msg
-do
-        local _exp_0 = math.random(1, 5)
-        if 1 == _exp_0 then
-                msg = "you are lucky"
-        elseif 2 == _exp_0 then
-                msg = "you are almost lucky"
-        else
-                msg = "not so lucky"
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        msg = "you are lucky"
+elseif 2 == _exp_0 then
+        msg = "you are almost lucky"
+else
+        msg = "not so lucky"
 end
 do
         local _exp_0 = math.random(1, 5)
@@ -3324,13 +3204,11 @@ do
                 print("not so lucky")
         end
 end
-do
-        local _exp_0 = math.random(1, 5)
-        if 1 == _exp_0 then
-                print("you are lucky")
-        else
-                print("not so lucky")
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        print("you are lucky")
+else
+        print("not so lucky")
 end
 local items = {
         {
@@ -3344,25 +3222,23 @@ local items = {
 }
 for _index_0 = 1, #items do
         local item = items[_index_0]
-        do
-                local _type_0 = type(item)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                local _match_0 = false
-                if _tab_0 then
-                        local x = item.x
-                        local y = item.y
-                        if x ~= nil and y ~= nil then
-                                _match_0 = true
-                                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
-                        end
+        local _type_0 = type(item)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        local _match_0 = false
+        if _tab_0 then
+                local x = item.x
+                local y = item.y
+                if x ~= nil and y ~= nil then
+                        _match_0 = true
+                        print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
                 end
-                if not _match_0 then
-                        if _tab_0 then
-                                local width = item.width
-                                local height = item.height
-                                if width ~= nil and height ~= nil then
-                                        print("size " .. tostring(width) .. ", " .. tostring(height))
-                                end
+        end
+        if not _match_0 then
+                if _tab_0 then
+                        local width = item.width
+                        local height = item.height
+                        if width ~= nil and height ~= nil then
+                                print("size " .. tostring(width) .. ", " .. tostring(height))
                         end
                 end
         end
@@ -3375,66 +3251,62 @@ end
 if y == nil then
         y = 200
 end
-do
-        local _type_0 = type(item)
-        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-        if _tab_0 then
-                do
-                        local _obj_0 = item.pos
-                        local _type_1 = type(_obj_0)
-                        if "table" == _type_1 or "userdata" == _type_1 then
-                                x = _obj_0.x
-                        end
-                end
-                do
-                        local _obj_0 = item.pos
-                        local _type_1 = type(_obj_0)
-                        if "table" == _type_1 or "userdata" == _type_1 then
-                                y = _obj_0.y
-                        end
-                end
-                if x == nil then
-                        x = 50
+local _type_0 = type(item)
+local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+if _tab_0 then
+        do
+                local _obj_0 = item.pos
+                local _type_1 = type(_obj_0)
+                if "table" == _type_1 or "userdata" == _type_1 then
+                        x = _obj_0.x
                 end
-                if y == nil then
-                        y = 200
+        end
+        do
+                local _obj_0 = item.pos
+                local _type_1 = type(_obj_0)
+                if "table" == _type_1 or "userdata" == _type_1 then
+                        y = _obj_0.y
                 end
-                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
         end
+        if x == nil then
+                x = 50
+        end
+        if y == nil then
+                y = 200
+        end
+        print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
 end
 local Inventory
-do
-        local _class_0
-        local _base_0 = {
-                add_item = function(self, name)
-                        if self.items[name] then
-                                local _obj_0 = self.items
-                                _obj_0[name] = _obj_0[name] + 1
-                        else
-                                self.items[name] = 1
-                        end
+local _class_0
+local _base_0 = {
+        add_item = function(self, name)
+                if self.items[name] then
+                        local _obj_0 = self.items
+                        _obj_0[name] = _obj_0[name] + 1
+                else
+                        self.items[name] = 1
                 end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
         end
-        _class_0 = setmetatable({
-                __init = function(self)
-                        self.items = { }
-                end,
-                __base = _base_0,
-                __name = "Inventory"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Inventory = _class_0
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function(self)
+                self.items = { }
+        end,
+        __base = _base_0,
+        __name = "Inventory"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Inventory = _class_0
 local inv = Inventory()
 inv:add_item("t-shirt")
 inv:add_item("pants")
@@ -3475,82 +3347,78 @@ for _index_0 = 1, #_list_0 do
         print(item)
 end
 local Person
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function(self)
+                self.clothes = { }
+        end,
+        __base = _base_0,
+        __name = "Person"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function(self)
-                        self.clothes = { }
-                end,
-                __base = _base_0,
-                __name = "Person"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Person = _class_0
-end
+})
+_base_0.__class = _class_0
+Person = _class_0
 local BackPack
-do
-        local _class_0
-        local _parent_0 = Inventory
-        local _base_0 = {
-                size = 10,
-                add_item = function(self, name)
-                        if #self.items > size then
-                                error("backpack is full")
-                        end
-                        return _class_0.__parent.__base.add_item(self, name)
-                end
-        }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
+local _class_0
+local _parent_0 = Inventory
+local _base_0 = {
+        size = 10,
+        add_item = function(self, name)
+                if #self.items > size then
+                        error("backpack is full")
                 end
+                return _class_0.__parent.__base.add_item(self, name)
         end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+}
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
         end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "BackPack",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "BackPack",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        BackPack = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+BackPack = _class_0
 local Shelf
 do
         local _class_0
@@ -3578,102 +3446,98 @@ do
         Shelf = _class_0
 end
 local Cupboard
-do
-        local _class_0
-        local _parent_0 = Shelf
-        local _base_0 = { }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
-                end
-        end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "Cupboard",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+local _class_0
+local _parent_0 = Shelf
+local _base_0 = { }
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
+        end
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "Cupboard",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        Cupboard = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+Cupboard = _class_0
 local MyClass
-do
-        local _class_0
-        local _parent_0 = ParentClass
-        local _base_0 = {
-                a_method = function(self)
-                        _class_0.__parent.__base.a_method(self, "hello", "world")
-                        _class_0.__parent.a_method(self, "hello", "world")
-                        _class_0.__parent.a_method(self, "hello", "world")
-                        return assert(_class_0.__parent == ParentClass)
-                end
-        }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
-                end
-        end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "MyClass",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+local _class_0
+local _parent_0 = ParentClass
+local _base_0 = {
+        a_method = function(self)
+                _class_0.__parent.__base.a_method(self, "hello", "world")
+                _class_0.__parent.a_method(self, "hello", "world")
+                _class_0.__parent.a_method(self, "hello", "world")
+                return assert(_class_0.__parent == ParentClass)
+        end
+}
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
+        end
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "MyClass",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        MyClass = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+MyClass = _class_0
 local b = BackPack()
 assert(b.__class == BackPack)
 print(BackPack.size)
@@ -3737,61 +3601,57 @@ Counter()
 print(Counter.count)
 self.__class:hello(1, 2, 3, 4)
 local Things
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Things"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Things"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        local self = _class_0;
-        self.class_var = "hello world"
-        Things = _class_0
-end
+})
+_base_0.__class = _class_0
+local self = _class_0;
+self.class_var = "hello world"
+Things = _class_0
 local MoreThings
-do
-        local _class_0
-        local secret, log
-        local _base_0 = {
-                some_method = function(self)
-                        return log("hello world: " .. secret)
-                end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local secret, log
+local _base_0 = {
+        some_method = function(self)
+                return log("hello world: " .. secret)
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "MoreThings"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        local self = _class_0;
-        secret = 123
-        log = function(msg)
-                return print("LOG:", msg)
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "MoreThings"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        MoreThings = _class_0
+})
+_base_0.__class = _class_0
+local self = _class_0;
+secret = 123
+log = function(msg)
+        return print("LOG:", msg)
 end
+MoreThings = _class_0
 assert(self == self)
 assert(self.__class == self.__class)
 local some_instance_method
@@ -3825,32 +3685,30 @@ do
         _base_0.__class = _class_0
         Something = _class_0
 end
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function(self, foo, bar, biz, baz)
+                self.foo = foo
+                self.bar = bar
+                self.__class.biz = biz
+                self.__class.baz = baz
+        end,
+        __base = _base_0,
+        __name = "Something"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function(self, foo, bar, biz, baz)
-                        self.foo = foo
-                        self.bar = bar
-                        self.__class.biz = biz
-                        self.__class.baz = baz
-                end,
-                __base = _base_0,
-                __name = "Something"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Something = _class_0
-end
+})
+_base_0.__class = _class_0
+Something = _class_0
 local new
 new = function(self, fieldA, fieldB)
         self.fieldA = fieldA
@@ -3861,33 +3719,31 @@ local obj = new({ }, 123, "abc")
 print(obj)
 local x
 local Bucket
-do
-        local _class_0
-        local _base_0 = {
-                drops = 0,
-                add_drop = function(self)
-                        self.drops = self.drops + 1
-                end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = {
+        drops = 0,
+        add_drop = function(self)
+                self.drops = self.drops + 1
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Bucket"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Bucket = _class_0
-        x = _class_0
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Bucket"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Bucket = _class_0
+x = _class_0
 local BigBucket
 do
         local _class_0
@@ -3939,27 +3795,25 @@ do
 end
 assert(Bucket.__name == "BigBucket")
 local x
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "x"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "x"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        x = _class_0
-end
+})
+_base_0.__class = _class_0
+x = _class_0
 local MyIndex = {
         __index = {
                 var = 1
@@ -4042,19 +3896,15 @@ end
 local y = Y()
 y:func()
 assert(y.__class.__parent ~= X)
-do
-        local _with_0 = Person()
-        _with_0.name = "Oswald"
-        _with_0:add_relative(my_dad)
-        _with_0:save()
-        print(_with_0.name)
-end
+local _with_0 = Person()
+_with_0.name = "Oswald"
+_with_0:add_relative(my_dad)
+_with_0:save()
+print(_with_0.name)
 local file
-do
-        local _with_0 = File("favorite_foods.txt")
-        _with_0:set_encoding("utf8")
-        file = _with_0
-end
+local _with_0 = File("favorite_foods.txt")
+_with_0:set_encoding("utf8")
+file = _with_0
 local create_person
 create_person = function(name, relatives)
         local _with_0 = Person()
@@ -4070,22 +3920,18 @@ local me = create_person("Leaf", {
         mother,
         sister
 })
-do
-        local str = "Hello"
-        print("original:", str)
-        print("upper:", str:upper())
-end
-do
-        local _with_0 = tb
-        _with_0[1] = 1
-        print(_with_0[2])
-        do
-                local _with_1 = _with_0[abc]
-                _with_1[3] = _with_1[2]:func()
-                _with_1["key-name"] = value
-        end
-        _with_0[#_with_0 + 1] = "abc"
-end
+local str = "Hello"
+print("original:", str)
+print("upper:", str:upper())
+local _with_0 = tb
+_with_0[1] = 1
+print(_with_0[2])
+do
+        local _with_1 = _with_0[abc]
+        _with_1[3] = _with_1[2]:func()
+        _with_1["key-name"] = value
+end
+_with_0[#_with_0 + 1] = "abc"
 do
         local var = "hello"
         print(var)
diff --git a/spec/outputs/codes_from_doc_zh.lua b/spec/outputs/codes_from_doc_zh.lua
index 15647b2..fff0bdd 100644
--- a/spec/outputs/codes_from_doc_zh.lua
+++ b/spec/outputs/codes_from_doc_zh.lua
@@ -46,13 +46,18 @@ _module_0["🌛"] = _ud83c_udf1b
 return _module_0
 local area = 6.2831853071796 * 5
 print('你好 世界')
-assert(item ~= nil)
+do
+        assert(item ~= nil)
+end
 local value = item
 if (f1() and f2() and f3()) then
         print("OK")
 end
+do
+        local funcA
+        funcA = function() end
+end
 local funcA
-funcA = function() end
 funcA = function()
         return "访问月之脚本定义的��"
 end
@@ -146,28 +151,26 @@ local b = {
         y = 1
 }
 local merge
-do
-        local _tab_0 = { }
-        local _idx_0 = 1
-        for _key_0, _value_0 in pairs(a) do
-                if _idx_0 == _key_0 then
-                        _tab_0[#_tab_0 + 1] = _value_0
-                        _idx_0 = _idx_0 + 1
-                else
-                        _tab_0[_key_0] = _value_0
-                end
+local _tab_0 = { }
+local _idx_0 = 1
+for _key_0, _value_0 in pairs(a) do
+        if _idx_0 == _key_0 then
+                _tab_0[#_tab_0 + 1] = _value_0
+                _idx_0 = _idx_0 + 1
+        else
+                _tab_0[_key_0] = _value_0
         end
-        local _idx_1 = 1
-        for _key_0, _value_0 in pairs(b) do
-                if _idx_1 == _key_0 then
-                        _tab_0[#_tab_0 + 1] = _value_0
-                        _idx_1 = _idx_1 + 1
-                else
-                        _tab_0[_key_0] = _value_0
-                end
+end
+local _idx_1 = 1
+for _key_0, _value_0 in pairs(b) do
+        if _idx_1 == _key_0 then
+                _tab_0[#_tab_0 + 1] = _value_0
+                _idx_1 = _idx_1 + 1
+        else
+                _tab_0[_key_0] = _value_0
         end
-        merge = _tab_0
 end
+merge = _tab_0
 local mt = { }
 local add
 add = function(self, right)
@@ -259,12 +262,10 @@ end
 if print and (x ~= nil) then
         print(x)
 end
-do
-        local _with_0 = io.open("test.txt", "w")
-        if _with_0 ~= nil then
-                _with_0:write("你好")
-                _with_0:close()
-        end
+local _with_0 = io.open("test.txt", "w")
+if _with_0 ~= nil then
+        _with_0:write("你好")
+        _with_0:close()
 end
 print("你好")
 print(1, 2)
@@ -341,10 +342,8 @@ do
                 x, y, z = _obj_0.x, _obj_0.y, _obj_0.z
         end
         local a, b, c
-        do
-                local _obj_0 = require('module')
-                a, b, c = _obj_0.a, _obj_0.b, _obj_0.c
-        end
+        local _obj_0 = require('module')
+        a, b, c = _obj_0.a, _obj_0.b, _obj_0.c
 end
 do
         local module = require('module')
@@ -383,29 +382,27 @@ y = function()
 end
 _module_0["y"] = y
 local Something
-do
-        local _class_0
-        local _base_0 = {
-                umm = "cool"
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Something"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Something = _class_0
+local _class_0
+local _base_0 = {
+        umm = "cool"
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Something"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Something = _class_0
 _module_0["Something"] = Something
 return _module_0
 local _module_0 = { }
@@ -436,11 +433,9 @@ if this then
 else
         _module_0[#_module_0 + 1] = 456
 end
-do
-        local _with_0 = tmp
-        local j = 2000
-        _module_0[#_module_0 + 1] = _with_0
-end
+local _with_0 = tmp
+local j = 2000
+_module_0[#_module_0 + 1] = _with_0
 return _module_0
 local _module_0 = nil
 _module_0 = function()
@@ -577,25 +572,19 @@ for _index_0 = 1, #tuples do
         local left, right = _des_0[1], _des_0[2]
         print(left, right)
 end
-do
-        local user = database.find_user("moon")
-        if user then
-                print(user.name)
-        end
+local user = database.find_user("moon")
+if user then
+        print(user.name)
 end
-do
-        local hello = os.getenv("hello")
-        if hello then
-                print("你有 hello", hello)
+local hello = os.getenv("hello")
+if hello then
+        print("你有 hello", hello)
+else
+        local world = os.getenv("world")
+        if world then
+                print("你有 world", world)
         else
-                do
-                        local world = os.getenv("world")
-                        if world then
-                                print("你有 world", world)
-                        else
-                                print("什么都没有 :(")
-                        end
-                end
+                print("什么都没有 :(")
         end
 end
 do
@@ -852,40 +841,34 @@ local items = {
         4
 }
 local doubled
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i, item in ipairs(items) do
-                _accum_0[_len_0] = item * 2
-                _len_0 = _len_0 + 1
-        end
-        doubled = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+for i, item in ipairs(items) do
+        _accum_0[_len_0] = item * 2
+        _len_0 = _len_0 + 1
 end
+doubled = _accum_0
 local iter = ipairs(items)
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i, item in iter do
-                if i > 1 and i < 3 then
-                        _accum_0[_len_0] = item
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for i, item in iter do
+        if i > 1 and i < 3 then
+                _accum_0[_len_0] = item
+                _len_0 = _len_0 + 1
         end
-        slice = _accum_0
 end
+slice = _accum_0
 local doubled
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 1, #_list_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item * 2
-                _len_0 = _len_0 + 1
-        end
-        doubled = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item * 2
+        _len_0 = _len_0 + 1
 end
+doubled = _accum_0
 local x_coords = {
         4,
         5,
@@ -898,57 +881,49 @@ local y_coords = {
         3
 }
 local points
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for _index_0 = 1, #x_coords do
-                local x = x_coords[_index_0]
-                for _index_1 = 1, #y_coords do
-                        local y = y_coords[_index_1]
-                        _accum_0[_len_0] = {
-                                x,
-                                y
-                        }
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for _index_0 = 1, #x_coords do
+        local x = x_coords[_index_0]
+        for _index_1 = 1, #y_coords do
+                local y = y_coords[_index_1]
+                _accum_0[_len_0] = {
+                        x,
+                        y
+                }
+                _len_0 = _len_0 + 1
         end
-        points = _accum_0
 end
+points = _accum_0
 local evens
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i = 1, 100 do
-                if i % 2 == 0 then
-                        _accum_0[_len_0] = i
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for i = 1, 100 do
+        if i % 2 == 0 then
+                _accum_0[_len_0] = i
+                _len_0 = _len_0 + 1
         end
-        evens = _accum_0
 end
+evens = _accum_0
 local thing = {
         color = "red",
         name = "fast",
         width = 123
 }
 local thing_copy
-do
-        local _tbl_0 = { }
-        for k, v in pairs(thing) do
-                _tbl_0[k] = v
-        end
-        thing_copy = _tbl_0
+local _tbl_0 = { }
+for k, v in pairs(thing) do
+        _tbl_0[k] = v
 end
+thing_copy = _tbl_0
 local no_color
-do
-        local _tbl_0 = { }
-        for k, v in pairs(thing) do
-                if k ~= "color" then
-                        _tbl_0[k] = v
-                end
+local _tbl_0 = { }
+for k, v in pairs(thing) do
+        if k ~= "color" then
+                _tbl_0[k] = v
         end
-        no_color = _tbl_0
 end
+no_color = _tbl_0
 local numbers = {
         1,
         2,
@@ -956,14 +931,12 @@ local numbers = {
         4
 }
 local sqrts
-do
-        local _tbl_0 = { }
-        for _index_0 = 1, #numbers do
-                local i = numbers[_index_0]
-                _tbl_0[i] = math.sqrt(i)
-        end
-        sqrts = _tbl_0
+local _tbl_0 = { }
+for _index_0 = 1, #numbers do
+        local i = numbers[_index_0]
+        _tbl_0[i] = math.sqrt(i)
 end
+sqrts = _tbl_0
 local tuples = {
         {
                 "hello",
@@ -975,52 +948,44 @@ local tuples = {
         }
 }
 local tbl
-do
-        local _tbl_0 = { }
-        for _index_0 = 1, #tuples do
-                local tuple = tuples[_index_0]
-                local _key_0, _val_0 = unpack(tuple)
-                _tbl_0[_key_0] = _val_0
-        end
-        tbl = _tbl_0
+local _tbl_0 = { }
+for _index_0 = 1, #tuples do
+        local tuple = tuples[_index_0]
+        local _key_0, _val_0 = unpack(tuple)
+        _tbl_0[_key_0] = _val_0
 end
+tbl = _tbl_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        local _max_0 = 5
-        for _index_0 = 1, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+local _max_0 = 5
+for _index_0 = 1, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 2, #_list_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 2, #_list_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 1, #_list_0, 2 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 1, #_list_0, 2 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 for i = 10, 20 do
         print(i)
 end
@@ -1030,13 +995,11 @@ end
 for key, value in pairs(object) do
         print(key, value)
 end
-do
-        local _list_0 = items
-        local _max_0 = 4
-        for _index_0 = 2, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
-                local item = _list_0[_index_0]
-                print(item)
-        end
+local _list_0 = items
+local _max_0 = 4
+for _index_0 = 2, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
+        local item = _list_0[_index_0]
+        print(item)
 end
 local _list_0 = items
 for _index_0 = 1, #_list_0 do
@@ -1047,19 +1010,17 @@ for j = 1, 10, 3 do
         print(j)
 end
 local doubled_evens
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i = 1, 20 do
-                if i % 2 == 0 then
-                        _accum_0[_len_0] = i * 2
-                else
-                        _accum_0[_len_0] = i
-                end
-                _len_0 = _len_0 + 1
+local _accum_0 = { }
+local _len_0 = 1
+for i = 1, 20 do
+        if i % 2 == 0 then
+                _accum_0[_len_0] = i * 2
+        else
+                _accum_0[_len_0] = i
         end
-        doubled_evens = _accum_0
+        _len_0 = _len_0 + 1
 end
+doubled_evens = _accum_0
 local func_a
 func_a = function()
         for i = 1, 10 do
@@ -1117,20 +1078,18 @@ local my_numbers = {
         6
 }
 local odds
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for _index_0 = 1, #my_numbers do
-                local x = my_numbers[_index_0]
-                if x % 2 == 1 then
-                        goto _continue_0
-                end
-                _accum_0[_len_0] = x
-                _len_0 = _len_0 + 1
-                ::_continue_0::
+local _accum_0 = { }
+local _len_0 = 1
+for _index_0 = 1, #my_numbers do
+        local x = my_numbers[_index_0]
+        if x % 2 == 1 then
+                goto _continue_0
         end
-        odds = _accum_0
+        _accum_0[_len_0] = x
+        _len_0 = _len_0 + 1
+        ::_continue_0::
 end
+odds = _accum_0
 local have_coins = false
 if have_coins then
         print("有硬�")
@@ -1222,15 +1181,13 @@ else
         next_number = error("数字数得太大了�")
 end
 local msg
-do
-        local _exp_0 = math.random(1, 5)
-        if 1 == _exp_0 then
-                msg = "你很幸�"
-        elseif 2 == _exp_0 then
-                msg = "你差点很幸�"
-        else
-                msg = "�太幸�"
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        msg = "你很幸�"
+elseif 2 == _exp_0 then
+        msg = "你差点很幸�"
+else
+        msg = "�太幸�"
 end
 do
         local _exp_0 = math.random(1, 5)
@@ -1240,13 +1197,11 @@ do
                 print("�太幸�")
         end
 end
-do
-        local _exp_0 = math.random(1, 5)
-        if 1 == _exp_0 then
-                print("你很幸�")
-        else
-                print("�太幸�")
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        print("你很幸�")
+else
+        print("�太幸�")
 end
 local items = {
         {
@@ -1260,25 +1215,23 @@ local items = {
 }
 for _index_0 = 1, #items do
         local item = items[_index_0]
-        do
-                local _type_0 = type(item)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                local _match_0 = false
-                if _tab_0 then
-                        local x = item.x
-                        local y = item.y
-                        if x ~= nil and y ~= nil then
-                                _match_0 = true
-                                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
-                        end
+        local _type_0 = type(item)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        local _match_0 = false
+        if _tab_0 then
+                local x = item.x
+                local y = item.y
+                if x ~= nil and y ~= nil then
+                        _match_0 = true
+                        print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
                 end
-                if not _match_0 then
-                        if _tab_0 then
-                                local width = item.width
-                                local height = item.height
-                                if width ~= nil and height ~= nil then
-                                        print("尺寸 " .. tostring(width) .. ", " .. tostring(height))
-                                end
+        end
+        if not _match_0 then
+                if _tab_0 then
+                        local width = item.width
+                        local height = item.height
+                        if width ~= nil and height ~= nil then
+                                print("尺寸 " .. tostring(width) .. ", " .. tostring(height))
                         end
                 end
         end
@@ -1291,66 +1244,62 @@ end
 if y == nil then
         y = 200
 end
-do
-        local _type_0 = type(item)
-        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-        if _tab_0 then
-                do
-                        local _obj_0 = item.pos
-                        local _type_1 = type(_obj_0)
-                        if "table" == _type_1 or "userdata" == _type_1 then
-                                x = _obj_0.x
-                        end
-                end
-                do
-                        local _obj_0 = item.pos
-                        local _type_1 = type(_obj_0)
-                        if "table" == _type_1 or "userdata" == _type_1 then
-                                y = _obj_0.y
-                        end
-                end
-                if x == nil then
-                        x = 50
+local _type_0 = type(item)
+local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+if _tab_0 then
+        do
+                local _obj_0 = item.pos
+                local _type_1 = type(_obj_0)
+                if "table" == _type_1 or "userdata" == _type_1 then
+                        x = _obj_0.x
                 end
-                if y == nil then
-                        y = 200
+        end
+        do
+                local _obj_0 = item.pos
+                local _type_1 = type(_obj_0)
+                if "table" == _type_1 or "userdata" == _type_1 then
+                        y = _obj_0.y
                 end
-                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
         end
+        if x == nil then
+                x = 50
+        end
+        if y == nil then
+                y = 200
+        end
+        print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
 end
 local Inventory
-do
-        local _class_0
-        local _base_0 = {
-                add_item = function(self, name)
-                        if self.items[name] then
-                                local _obj_0 = self.items
-                                _obj_0[name] = _obj_0[name] + 1
-                        else
-                                self.items[name] = 1
-                        end
+local _class_0
+local _base_0 = {
+        add_item = function(self, name)
+                if self.items[name] then
+                        local _obj_0 = self.items
+                        _obj_0[name] = _obj_0[name] + 1
+                else
+                        self.items[name] = 1
                 end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
         end
-        _class_0 = setmetatable({
-                __init = function(self)
-                        self.items = { }
-                end,
-                __base = _base_0,
-                __name = "Inventory"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Inventory = _class_0
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function(self)
+                self.items = { }
+        end,
+        __base = _base_0,
+        __name = "Inventory"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Inventory = _class_0
 local inv = Inventory()
 inv:add_item("t-shirt")
 inv:add_item("pants")
@@ -1391,82 +1340,78 @@ for _index_0 = 1, #_list_0 do
         print(item)
 end
 local Person
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function(self)
+                self.clothes = { }
+        end,
+        __base = _base_0,
+        __name = "Person"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function(self)
-                        self.clothes = { }
-                end,
-                __base = _base_0,
-                __name = "Person"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Person = _class_0
-end
+})
+_base_0.__class = _class_0
+Person = _class_0
 local BackPack
-do
-        local _class_0
-        local _parent_0 = Inventory
-        local _base_0 = {
-                size = 10,
-                add_item = function(self, name)
-                        if #self.items > size then
-                                error("背包已满")
-                        end
-                        return _class_0.__parent.__base.add_item(self, name)
-                end
-        }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
+local _class_0
+local _parent_0 = Inventory
+local _base_0 = {
+        size = 10,
+        add_item = function(self, name)
+                if #self.items > size then
+                        error("背包已满")
                 end
+                return _class_0.__parent.__base.add_item(self, name)
         end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+}
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
         end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "BackPack",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "BackPack",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        BackPack = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+BackPack = _class_0
 local Shelf
 do
         local _class_0
@@ -1494,102 +1439,98 @@ do
         Shelf = _class_0
 end
 local Cupboard
-do
-        local _class_0
-        local _parent_0 = Shelf
-        local _base_0 = { }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
-                end
-        end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "Cupboard",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+local _class_0
+local _parent_0 = Shelf
+local _base_0 = { }
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
+        end
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "Cupboard",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        Cupboard = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+Cupboard = _class_0
 local MyClass
-do
-        local _class_0
-        local _parent_0 = ParentClass
-        local _base_0 = {
-                a_method = function(self)
-                        _class_0.__parent.__base.a_method(self, "你好", "世界")
-                        _class_0.__parent.a_method(self, "你好", "世界")
-                        _class_0.__parent.a_method(self, "你好", "世界")
-                        return assert(_class_0.__parent == ParentClass)
-                end
-        }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
-                end
-        end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "MyClass",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+local _class_0
+local _parent_0 = ParentClass
+local _base_0 = {
+        a_method = function(self)
+                _class_0.__parent.__base.a_method(self, "你好", "世界")
+                _class_0.__parent.a_method(self, "你好", "世界")
+                _class_0.__parent.a_method(self, "你好", "世界")
+                return assert(_class_0.__parent == ParentClass)
+        end
+}
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
+        end
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "MyClass",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        MyClass = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+MyClass = _class_0
 local b = BackPack()
 assert(b.__class == BackPack)
 print(BackPack.size)
@@ -1653,61 +1594,57 @@ Counter()
 print(Counter.count)
 self.__class:hello(1, 2, 3, 4)
 local Things
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Things"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Things"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        local self = _class_0;
-        self.class_var = "hello world"
-        Things = _class_0
-end
+})
+_base_0.__class = _class_0
+local self = _class_0;
+self.class_var = "hello world"
+Things = _class_0
 local MoreThings
-do
-        local _class_0
-        local secret, log
-        local _base_0 = {
-                some_method = function(self)
-                        return log("hello world: " .. secret)
-                end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local secret, log
+local _base_0 = {
+        some_method = function(self)
+                return log("hello world: " .. secret)
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "MoreThings"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        local self = _class_0;
-        secret = 123
-        log = function(msg)
-                return print("LOG:", msg)
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "MoreThings"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        MoreThings = _class_0
+})
+_base_0.__class = _class_0
+local self = _class_0;
+secret = 123
+log = function(msg)
+        return print("LOG:", msg)
 end
+MoreThings = _class_0
 assert(self == self)
 assert(self.__class == self.__class)
 local some_instance_method
@@ -1741,32 +1678,30 @@ do
         _base_0.__class = _class_0
         Something = _class_0
 end
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function(self, foo, bar, biz, baz)
+                self.foo = foo
+                self.bar = bar
+                self.__class.biz = biz
+                self.__class.baz = baz
+        end,
+        __base = _base_0,
+        __name = "Something"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function(self, foo, bar, biz, baz)
-                        self.foo = foo
-                        self.bar = bar
-                        self.__class.biz = biz
-                        self.__class.baz = baz
-                end,
-                __base = _base_0,
-                __name = "Something"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Something = _class_0
-end
+})
+_base_0.__class = _class_0
+Something = _class_0
 local new
 new = function(self, fieldA, fieldB)
         self.fieldA = fieldA
@@ -1777,33 +1712,31 @@ local obj = new({ }, 123, "abc")
 print(obj)
 local x
 local Bucket
-do
-        local _class_0
-        local _base_0 = {
-                drops = 0,
-                add_drop = function(self)
-                        self.drops = self.drops + 1
-                end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = {
+        drops = 0,
+        add_drop = function(self)
+                self.drops = self.drops + 1
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Bucket"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Bucket = _class_0
-        x = _class_0
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Bucket"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Bucket = _class_0
+x = _class_0
 local BigBucket
 do
         local _class_0
@@ -1855,27 +1788,25 @@ do
 end
 assert(Bucket.__name == "BigBucket")
 local x
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "x"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "x"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        x = _class_0
-end
+})
+_base_0.__class = _class_0
+x = _class_0
 local MyIndex = {
         __index = {
                 var = 1
@@ -1958,19 +1889,15 @@ end
 local y = Y()
 y:func()
 assert(y.__class.__parent ~= X)
-do
-        local _with_0 = Person()
-        _with_0.name = "Oswald"
-        _with_0:add_relative(my_dad)
-        _with_0:save()
-        print(_with_0.name)
-end
+local _with_0 = Person()
+_with_0.name = "Oswald"
+_with_0:add_relative(my_dad)
+_with_0:save()
+print(_with_0.name)
 local file
-do
-        local _with_0 = File("favorite_foods.txt")
-        _with_0:set_encoding("utf8")
-        file = _with_0
-end
+local _with_0 = File("favorite_foods.txt")
+_with_0:set_encoding("utf8")
+file = _with_0
 local create_person
 create_person = function(name, relatives)
         local _with_0 = Person()
@@ -1986,22 +1913,18 @@ local me = create_person("Leaf", {
         mother,
         sister
 })
+local str = "你好"
+print("原始:", str)
+print("大写:", str:upper())
+local _with_0 = tb
+_with_0[1] = 1
+print(_with_0[2])
 do
-        local str = "你好"
-        print("原始:", str)
-        print("大写:", str:upper())
-end
-do
-        local _with_0 = tb
-        _with_0[1] = 1
-        print(_with_0[2])
-        do
-                local _with_1 = _with_0[abc]
-                _with_1[3] = _with_1[2]:func()
-                _with_1["key-name"] = value
-        end
-        _with_0[#_with_0 + 1] = "abc"
+        local _with_1 = _with_0[abc]
+        _with_1[3] = _with_1[2]:func()
+        _with_1["key-name"] = value
 end
+_with_0[#_with_0 + 1] = "abc"
 do
         local var = "hello"
         print(var)
@@ -2118,13 +2041,18 @@ _module_0["🌛"] = _ud83c_udf1b
 return _module_0
 local area = 6.2831853071796 * 5
 print('你好 世界')
-assert(item ~= nil)
+do
+        assert(item ~= nil)
+end
 local value = item
 if (f1() and f2() and f3()) then
         print("OK")
 end
+do
+        local funcA
+        funcA = function() end
+end
 local funcA
-funcA = function() end
 funcA = function()
         return "访问月之脚本定义的��"
 end
@@ -2218,28 +2146,26 @@ local b = {
         y = 1
 }
 local merge
-do
-        local _tab_0 = { }
-        local _idx_0 = 1
-        for _key_0, _value_0 in pairs(a) do
-                if _idx_0 == _key_0 then
-                        _tab_0[#_tab_0 + 1] = _value_0
-                        _idx_0 = _idx_0 + 1
-                else
-                        _tab_0[_key_0] = _value_0
-                end
+local _tab_0 = { }
+local _idx_0 = 1
+for _key_0, _value_0 in pairs(a) do
+        if _idx_0 == _key_0 then
+                _tab_0[#_tab_0 + 1] = _value_0
+                _idx_0 = _idx_0 + 1
+        else
+                _tab_0[_key_0] = _value_0
         end
-        local _idx_1 = 1
-        for _key_0, _value_0 in pairs(b) do
-                if _idx_1 == _key_0 then
-                        _tab_0[#_tab_0 + 1] = _value_0
-                        _idx_1 = _idx_1 + 1
-                else
-                        _tab_0[_key_0] = _value_0
-                end
+end
+local _idx_1 = 1
+for _key_0, _value_0 in pairs(b) do
+        if _idx_1 == _key_0 then
+                _tab_0[#_tab_0 + 1] = _value_0
+                _idx_1 = _idx_1 + 1
+        else
+                _tab_0[_key_0] = _value_0
         end
-        merge = _tab_0
 end
+merge = _tab_0
 local mt = { }
 local add
 add = function(self, right)
@@ -2331,12 +2257,10 @@ end
 if print and (x ~= nil) then
         print(x)
 end
-do
-        local _with_0 = io.open("test.txt", "w")
-        if _with_0 ~= nil then
-                _with_0:write("你好")
-                _with_0:close()
-        end
+local _with_0 = io.open("test.txt", "w")
+if _with_0 ~= nil then
+        _with_0:write("你好")
+        _with_0:close()
 end
 print("你好")
 print(1, 2)
@@ -2413,10 +2337,8 @@ do
                 x, y, z = _obj_0.x, _obj_0.y, _obj_0.z
         end
         local a, b, c
-        do
-                local _obj_0 = require('module')
-                a, b, c = _obj_0.a, _obj_0.b, _obj_0.c
-        end
+        local _obj_0 = require('module')
+        a, b, c = _obj_0.a, _obj_0.b, _obj_0.c
 end
 do
         local module = require('module')
@@ -2455,29 +2377,27 @@ y = function()
 end
 _module_0["y"] = y
 local Something
-do
-        local _class_0
-        local _base_0 = {
-                umm = "cool"
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Something"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Something = _class_0
+local _class_0
+local _base_0 = {
+        umm = "cool"
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Something"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Something = _class_0
 _module_0["Something"] = Something
 return _module_0
 local _module_0 = { }
@@ -2508,11 +2428,9 @@ if this then
 else
         _module_0[#_module_0 + 1] = 456
 end
-do
-        local _with_0 = tmp
-        local j = 2000
-        _module_0[#_module_0 + 1] = _with_0
-end
+local _with_0 = tmp
+local j = 2000
+_module_0[#_module_0 + 1] = _with_0
 return _module_0
 local _module_0 = nil
 _module_0 = function()
@@ -2649,25 +2567,19 @@ for _index_0 = 1, #tuples do
         local left, right = _des_0[1], _des_0[2]
         print(left, right)
 end
-do
-        local user = database.find_user("moon")
-        if user then
-                print(user.name)
-        end
+local user = database.find_user("moon")
+if user then
+        print(user.name)
 end
-do
-        local hello = os.getenv("hello")
-        if hello then
-                print("你有 hello", hello)
+local hello = os.getenv("hello")
+if hello then
+        print("你有 hello", hello)
+else
+        local world = os.getenv("world")
+        if world then
+                print("你有 world", world)
         else
-                do
-                        local world = os.getenv("world")
-                        if world then
-                                print("你有 world", world)
-                        else
-                                print("什么都没有 :(")
-                        end
-                end
+                print("什么都没有 :(")
         end
 end
 do
@@ -2924,40 +2836,34 @@ local items = {
         4
 }
 local doubled
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i, item in ipairs(items) do
-                _accum_0[_len_0] = item * 2
-                _len_0 = _len_0 + 1
-        end
-        doubled = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+for i, item in ipairs(items) do
+        _accum_0[_len_0] = item * 2
+        _len_0 = _len_0 + 1
 end
+doubled = _accum_0
 local iter = ipairs(items)
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i, item in iter do
-                if i > 1 and i < 3 then
-                        _accum_0[_len_0] = item
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for i, item in iter do
+        if i > 1 and i < 3 then
+                _accum_0[_len_0] = item
+                _len_0 = _len_0 + 1
         end
-        slice = _accum_0
 end
+slice = _accum_0
 local doubled
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 1, #_list_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item * 2
-                _len_0 = _len_0 + 1
-        end
-        doubled = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item * 2
+        _len_0 = _len_0 + 1
 end
+doubled = _accum_0
 local x_coords = {
         4,
         5,
@@ -2970,57 +2876,49 @@ local y_coords = {
         3
 }
 local points
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for _index_0 = 1, #x_coords do
-                local x = x_coords[_index_0]
-                for _index_1 = 1, #y_coords do
-                        local y = y_coords[_index_1]
-                        _accum_0[_len_0] = {
-                                x,
-                                y
-                        }
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for _index_0 = 1, #x_coords do
+        local x = x_coords[_index_0]
+        for _index_1 = 1, #y_coords do
+                local y = y_coords[_index_1]
+                _accum_0[_len_0] = {
+                        x,
+                        y
+                }
+                _len_0 = _len_0 + 1
         end
-        points = _accum_0
 end
+points = _accum_0
 local evens
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i = 1, 100 do
-                if i % 2 == 0 then
-                        _accum_0[_len_0] = i
-                        _len_0 = _len_0 + 1
-                end
+local _accum_0 = { }
+local _len_0 = 1
+for i = 1, 100 do
+        if i % 2 == 0 then
+                _accum_0[_len_0] = i
+                _len_0 = _len_0 + 1
         end
-        evens = _accum_0
 end
+evens = _accum_0
 local thing = {
         color = "red",
         name = "fast",
         width = 123
 }
 local thing_copy
-do
-        local _tbl_0 = { }
-        for k, v in pairs(thing) do
-                _tbl_0[k] = v
-        end
-        thing_copy = _tbl_0
+local _tbl_0 = { }
+for k, v in pairs(thing) do
+        _tbl_0[k] = v
 end
+thing_copy = _tbl_0
 local no_color
-do
-        local _tbl_0 = { }
-        for k, v in pairs(thing) do
-                if k ~= "color" then
-                        _tbl_0[k] = v
-                end
+local _tbl_0 = { }
+for k, v in pairs(thing) do
+        if k ~= "color" then
+                _tbl_0[k] = v
         end
-        no_color = _tbl_0
 end
+no_color = _tbl_0
 local numbers = {
         1,
         2,
@@ -3028,14 +2926,12 @@ local numbers = {
         4
 }
 local sqrts
-do
-        local _tbl_0 = { }
-        for _index_0 = 1, #numbers do
-                local i = numbers[_index_0]
-                _tbl_0[i] = math.sqrt(i)
-        end
-        sqrts = _tbl_0
+local _tbl_0 = { }
+for _index_0 = 1, #numbers do
+        local i = numbers[_index_0]
+        _tbl_0[i] = math.sqrt(i)
 end
+sqrts = _tbl_0
 local tuples = {
         {
                 "hello",
@@ -3047,52 +2943,44 @@ local tuples = {
         }
 }
 local tbl
-do
-        local _tbl_0 = { }
-        for _index_0 = 1, #tuples do
-                local tuple = tuples[_index_0]
-                local _key_0, _val_0 = unpack(tuple)
-                _tbl_0[_key_0] = _val_0
-        end
-        tbl = _tbl_0
+local _tbl_0 = { }
+for _index_0 = 1, #tuples do
+        local tuple = tuples[_index_0]
+        local _key_0, _val_0 = unpack(tuple)
+        _tbl_0[_key_0] = _val_0
 end
+tbl = _tbl_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        local _max_0 = 5
-        for _index_0 = 1, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+local _max_0 = 5
+for _index_0 = 1, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 2, #_list_0 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 2, #_list_0 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 local slice
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_0 = items
-        for _index_0 = 1, #_list_0, 2 do
-                local item = _list_0[_index_0]
-                _accum_0[_len_0] = item
-                _len_0 = _len_0 + 1
-        end
-        slice = _accum_0
+local _accum_0 = { }
+local _len_0 = 1
+local _list_0 = items
+for _index_0 = 1, #_list_0, 2 do
+        local item = _list_0[_index_0]
+        _accum_0[_len_0] = item
+        _len_0 = _len_0 + 1
 end
+slice = _accum_0
 for i = 10, 20 do
         print(i)
 end
@@ -3102,13 +2990,11 @@ end
 for key, value in pairs(object) do
         print(key, value)
 end
-do
-        local _list_0 = items
-        local _max_0 = 4
-        for _index_0 = 2, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
-                local item = _list_0[_index_0]
-                print(item)
-        end
+local _list_0 = items
+local _max_0 = 4
+for _index_0 = 2, _max_0 < 0 and #_list_0 + _max_0 or _max_0 do
+        local item = _list_0[_index_0]
+        print(item)
 end
 local _list_0 = items
 for _index_0 = 1, #_list_0 do
@@ -3119,19 +3005,17 @@ for j = 1, 10, 3 do
         print(j)
 end
 local doubled_evens
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for i = 1, 20 do
-                if i % 2 == 0 then
-                        _accum_0[_len_0] = i * 2
-                else
-                        _accum_0[_len_0] = i
-                end
-                _len_0 = _len_0 + 1
+local _accum_0 = { }
+local _len_0 = 1
+for i = 1, 20 do
+        if i % 2 == 0 then
+                _accum_0[_len_0] = i * 2
+        else
+                _accum_0[_len_0] = i
         end
-        doubled_evens = _accum_0
+        _len_0 = _len_0 + 1
 end
+doubled_evens = _accum_0
 local func_a
 func_a = function()
         for i = 1, 10 do
@@ -3189,20 +3073,18 @@ local my_numbers = {
         6
 }
 local odds
-do
-        local _accum_0 = { }
-        local _len_0 = 1
-        for _index_0 = 1, #my_numbers do
-                local x = my_numbers[_index_0]
-                if x % 2 == 1 then
-                        goto _continue_0
-                end
-                _accum_0[_len_0] = x
-                _len_0 = _len_0 + 1
-                ::_continue_0::
+local _accum_0 = { }
+local _len_0 = 1
+for _index_0 = 1, #my_numbers do
+        local x = my_numbers[_index_0]
+        if x % 2 == 1 then
+                goto _continue_0
         end
-        odds = _accum_0
+        _accum_0[_len_0] = x
+        _len_0 = _len_0 + 1
+        ::_continue_0::
 end
+odds = _accum_0
 local have_coins = false
 if have_coins then
         print("有硬�")
@@ -3294,15 +3176,13 @@ else
         next_number = error("数字数得太大了�")
 end
 local msg
-do
-        local _exp_0 = math.random(1, 5)
-        if 1 == _exp_0 then
-                msg = "你很幸�"
-        elseif 2 == _exp_0 then
-                msg = "你差点很幸�"
-        else
-                msg = "�太幸�"
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        msg = "你很幸�"
+elseif 2 == _exp_0 then
+        msg = "你差点很幸�"
+else
+        msg = "�太幸�"
 end
 do
         local _exp_0 = math.random(1, 5)
@@ -3312,13 +3192,11 @@ do
                 print("�太幸�")
         end
 end
-do
-        local _exp_0 = math.random(1, 5)
-        if 1 == _exp_0 then
-                print("你很幸�")
-        else
-                print("�太幸�")
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        print("你很幸�")
+else
+        print("�太幸�")
 end
 local items = {
         {
@@ -3332,25 +3210,23 @@ local items = {
 }
 for _index_0 = 1, #items do
         local item = items[_index_0]
-        do
-                local _type_0 = type(item)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                local _match_0 = false
-                if _tab_0 then
-                        local x = item.x
-                        local y = item.y
-                        if x ~= nil and y ~= nil then
-                                _match_0 = true
-                                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
-                        end
+        local _type_0 = type(item)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        local _match_0 = false
+        if _tab_0 then
+                local x = item.x
+                local y = item.y
+                if x ~= nil and y ~= nil then
+                        _match_0 = true
+                        print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
                 end
-                if not _match_0 then
-                        if _tab_0 then
-                                local width = item.width
-                                local height = item.height
-                                if width ~= nil and height ~= nil then
-                                        print("尺寸 " .. tostring(width) .. ", " .. tostring(height))
-                                end
+        end
+        if not _match_0 then
+                if _tab_0 then
+                        local width = item.width
+                        local height = item.height
+                        if width ~= nil and height ~= nil then
+                                print("尺寸 " .. tostring(width) .. ", " .. tostring(height))
                         end
                 end
         end
@@ -3363,66 +3239,62 @@ end
 if y == nil then
         y = 200
 end
-do
-        local _type_0 = type(item)
-        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-        if _tab_0 then
-                do
-                        local _obj_0 = item.pos
-                        local _type_1 = type(_obj_0)
-                        if "table" == _type_1 or "userdata" == _type_1 then
-                                x = _obj_0.x
-                        end
-                end
-                do
-                        local _obj_0 = item.pos
-                        local _type_1 = type(_obj_0)
-                        if "table" == _type_1 or "userdata" == _type_1 then
-                                y = _obj_0.y
-                        end
-                end
-                if x == nil then
-                        x = 50
+local _type_0 = type(item)
+local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+if _tab_0 then
+        do
+                local _obj_0 = item.pos
+                local _type_1 = type(_obj_0)
+                if "table" == _type_1 or "userdata" == _type_1 then
+                        x = _obj_0.x
                 end
-                if y == nil then
-                        y = 200
+        end
+        do
+                local _obj_0 = item.pos
+                local _type_1 = type(_obj_0)
+                if "table" == _type_1 or "userdata" == _type_1 then
+                        y = _obj_0.y
                 end
-                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
         end
+        if x == nil then
+                x = 50
+        end
+        if y == nil then
+                y = 200
+        end
+        print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
 end
 local Inventory
-do
-        local _class_0
-        local _base_0 = {
-                add_item = function(self, name)
-                        if self.items[name] then
-                                local _obj_0 = self.items
-                                _obj_0[name] = _obj_0[name] + 1
-                        else
-                                self.items[name] = 1
-                        end
+local _class_0
+local _base_0 = {
+        add_item = function(self, name)
+                if self.items[name] then
+                        local _obj_0 = self.items
+                        _obj_0[name] = _obj_0[name] + 1
+                else
+                        self.items[name] = 1
                 end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
         end
-        _class_0 = setmetatable({
-                __init = function(self)
-                        self.items = { }
-                end,
-                __base = _base_0,
-                __name = "Inventory"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Inventory = _class_0
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function(self)
+                self.items = { }
+        end,
+        __base = _base_0,
+        __name = "Inventory"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Inventory = _class_0
 local inv = Inventory()
 inv:add_item("t-shirt")
 inv:add_item("pants")
@@ -3463,82 +3335,78 @@ for _index_0 = 1, #_list_0 do
         print(item)
 end
 local Person
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function(self)
+                self.clothes = { }
+        end,
+        __base = _base_0,
+        __name = "Person"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function(self)
-                        self.clothes = { }
-                end,
-                __base = _base_0,
-                __name = "Person"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Person = _class_0
-end
+})
+_base_0.__class = _class_0
+Person = _class_0
 local BackPack
-do
-        local _class_0
-        local _parent_0 = Inventory
-        local _base_0 = {
-                size = 10,
-                add_item = function(self, name)
-                        if #self.items > size then
-                                error("背包已满")
-                        end
-                        return _class_0.__parent.__base.add_item(self, name)
-                end
-        }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
+local _class_0
+local _parent_0 = Inventory
+local _base_0 = {
+        size = 10,
+        add_item = function(self, name)
+                if #self.items > size then
+                        error("背包已满")
                 end
+                return _class_0.__parent.__base.add_item(self, name)
         end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+}
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
         end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "BackPack",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "BackPack",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        BackPack = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+BackPack = _class_0
 local Shelf
 do
         local _class_0
@@ -3566,102 +3434,98 @@ do
         Shelf = _class_0
 end
 local Cupboard
-do
-        local _class_0
-        local _parent_0 = Shelf
-        local _base_0 = { }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
-                end
-        end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "Cupboard",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+local _class_0
+local _parent_0 = Shelf
+local _base_0 = { }
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
+        end
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "Cupboard",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        Cupboard = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+Cupboard = _class_0
 local MyClass
-do
-        local _class_0
-        local _parent_0 = ParentClass
-        local _base_0 = {
-                a_method = function(self)
-                        _class_0.__parent.__base.a_method(self, "你好", "世界")
-                        _class_0.__parent.a_method(self, "你好", "世界")
-                        _class_0.__parent.a_method(self, "你好", "世界")
-                        return assert(_class_0.__parent == ParentClass)
-                end
-        }
-        for _key_0, _val_0 in pairs(_parent_0.__base) do
-                if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
-                        _base_0[_key_0] = _val_0
-                end
-        end
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
-        end
-        setmetatable(_base_0, _parent_0.__base)
-        _class_0 = setmetatable({
-                __init = function(self, ...)
-                        return _class_0.__parent.__init(self, ...)
-                end,
-                __base = _base_0,
-                __name = "MyClass",
-                __parent = _parent_0
-        }, {
-                __index = function(cls, name)
-                        local val = rawget(_base_0, name)
-                        if val == nil then
-                                local parent = rawget(cls, "__parent")
-                                if parent then
-                                        return parent[name]
-                                end
-                        else
-                                return val
+local _class_0
+local _parent_0 = ParentClass
+local _base_0 = {
+        a_method = function(self)
+                _class_0.__parent.__base.a_method(self, "你好", "世界")
+                _class_0.__parent.a_method(self, "你好", "世界")
+                _class_0.__parent.a_method(self, "你好", "世界")
+                return assert(_class_0.__parent == ParentClass)
+        end
+}
+for _key_0, _val_0 in pairs(_parent_0.__base) do
+        if _base_0[_key_0] == nil and _key_0:match("^__") and not (_key_0 == "__index" and _val_0 == _parent_0.__base) then
+                _base_0[_key_0] = _val_0
+        end
+end
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+setmetatable(_base_0, _parent_0.__base)
+_class_0 = setmetatable({
+        __init = function(self, ...)
+                return _class_0.__parent.__init(self, ...)
+        end,
+        __base = _base_0,
+        __name = "MyClass",
+        __parent = _parent_0
+}, {
+        __index = function(cls, name)
+                local val = rawget(_base_0, name)
+                if val == nil then
+                        local parent = rawget(cls, "__parent")
+                        if parent then
+                                return parent[name]
                         end
-                end,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
+                else
+                        return val
                 end
-        })
-        _base_0.__class = _class_0
-        if _parent_0.__inherited then
-                _parent_0.__inherited(_parent_0, _class_0)
+        end,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        MyClass = _class_0
+})
+_base_0.__class = _class_0
+if _parent_0.__inherited then
+        _parent_0.__inherited(_parent_0, _class_0)
 end
+MyClass = _class_0
 local b = BackPack()
 assert(b.__class == BackPack)
 print(BackPack.size)
@@ -3725,61 +3589,57 @@ Counter()
 print(Counter.count)
 self.__class:hello(1, 2, 3, 4)
 local Things
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Things"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Things"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        local self = _class_0;
-        self.class_var = "hello world"
-        Things = _class_0
-end
+})
+_base_0.__class = _class_0
+local self = _class_0;
+self.class_var = "hello world"
+Things = _class_0
 local MoreThings
-do
-        local _class_0
-        local secret, log
-        local _base_0 = {
-                some_method = function(self)
-                        return log("hello world: " .. secret)
-                end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local secret, log
+local _base_0 = {
+        some_method = function(self)
+                return log("hello world: " .. secret)
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "MoreThings"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        local self = _class_0;
-        secret = 123
-        log = function(msg)
-                return print("LOG:", msg)
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "MoreThings"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        MoreThings = _class_0
+})
+_base_0.__class = _class_0
+local self = _class_0;
+secret = 123
+log = function(msg)
+        return print("LOG:", msg)
 end
+MoreThings = _class_0
 assert(self == self)
 assert(self.__class == self.__class)
 local some_instance_method
@@ -3813,32 +3673,30 @@ do
         _base_0.__class = _class_0
         Something = _class_0
 end
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function(self, foo, bar, biz, baz)
+                self.foo = foo
+                self.bar = bar
+                self.__class.biz = biz
+                self.__class.baz = baz
+        end,
+        __base = _base_0,
+        __name = "Something"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function(self, foo, bar, biz, baz)
-                        self.foo = foo
-                        self.bar = bar
-                        self.__class.biz = biz
-                        self.__class.baz = baz
-                end,
-                __base = _base_0,
-                __name = "Something"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Something = _class_0
-end
+})
+_base_0.__class = _class_0
+Something = _class_0
 local new
 new = function(self, fieldA, fieldB)
         self.fieldA = fieldA
@@ -3849,33 +3707,31 @@ local obj = new({ }, 123, "abc")
 print(obj)
 local x
 local Bucket
-do
-        local _class_0
-        local _base_0 = {
-                drops = 0,
-                add_drop = function(self)
-                        self.drops = self.drops + 1
-                end
-        }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = {
+        drops = 0,
+        add_drop = function(self)
+                self.drops = self.drops + 1
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "Bucket"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        Bucket = _class_0
-        x = _class_0
+}
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
 end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "Bucket"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
+        end
+})
+_base_0.__class = _class_0
+Bucket = _class_0
+x = _class_0
 local BigBucket
 do
         local _class_0
@@ -3927,27 +3783,25 @@ do
 end
 assert(Bucket.__name == "BigBucket")
 local x
-do
-        local _class_0
-        local _base_0 = { }
-        if _base_0.__index == nil then
-                _base_0.__index = _base_0
+local _class_0
+local _base_0 = { }
+if _base_0.__index == nil then
+        _base_0.__index = _base_0
+end
+_class_0 = setmetatable({
+        __init = function() end,
+        __base = _base_0,
+        __name = "x"
+}, {
+        __index = _base_0,
+        __call = function(cls, ...)
+                local _self_0 = setmetatable({ }, _base_0)
+                cls.__init(_self_0, ...)
+                return _self_0
         end
-        _class_0 = setmetatable({
-                __init = function() end,
-                __base = _base_0,
-                __name = "x"
-        }, {
-                __index = _base_0,
-                __call = function(cls, ...)
-                        local _self_0 = setmetatable({ }, _base_0)
-                        cls.__init(_self_0, ...)
-                        return _self_0
-                end
-        })
-        _base_0.__class = _class_0
-        x = _class_0
-end
+})
+_base_0.__class = _class_0
+x = _class_0
 local MyIndex = {
         __index = {
                 var = 1
@@ -4030,19 +3884,15 @@ end
 local y = Y()
 y:func()
 assert(y.__class.__parent ~= X)
-do
-        local _with_0 = Person()
-        _with_0.name = "Oswald"
-        _with_0:add_relative(my_dad)
-        _with_0:save()
-        print(_with_0.name)
-end
+local _with_0 = Person()
+_with_0.name = "Oswald"
+_with_0:add_relative(my_dad)
+_with_0:save()
+print(_with_0.name)
 local file
-do
-        local _with_0 = File("favorite_foods.txt")
-        _with_0:set_encoding("utf8")
-        file = _with_0
-end
+local _with_0 = File("favorite_foods.txt")
+_with_0:set_encoding("utf8")
+file = _with_0
 local create_person
 create_person = function(name, relatives)
         local _with_0 = Person()
@@ -4058,22 +3908,18 @@ local me = create_person("Leaf", {
         mother,
         sister
 })
-do
-        local str = "你好"
-        print("原始:", str)
-        print("大写:", str:upper())
-end
-do
-        local _with_0 = tb
-        _with_0[1] = 1
-        print(_with_0[2])
-        do
-                local _with_1 = _with_0[abc]
-                _with_1[3] = _with_1[2]:func()
-                _with_1["key-name"] = value
-        end
-        _with_0[#_with_0 + 1] = "abc"
-end
+local str = "你好"
+print("原始:", str)
+print("大写:", str:upper())
+local _with_0 = tb
+_with_0[1] = 1
+print(_with_0[2])
+do
+        local _with_1 = _with_0[abc]
+        _with_1[3] = _with_1[2]:func()
+        _with_1["key-name"] = value
+end
+_with_0[#_with_0 + 1] = "abc"
 do
         local var = "hello"
         print(var)
diff --git a/spec/outputs/compile_doc.lua b/spec/outputs/compile_doc.lua
index 7597cb8..29f4aeb 100644
--- a/spec/outputs/compile_doc.lua
+++ b/spec/outputs/compile_doc.lua
@@ -19,31 +19,27 @@ for _index_0 = 1, #_list_0 do
                         local text = _with_0:read("*a")
                         local codes = { }
                         for code in text:gmatch("```moonscript(.-)```") do
-                                do
-                                        local result, err = to_lua(code, {
-                                                implicit_return_root = false,
-                                                reserve_line_number = false
-                                        })
-                                        if result then
-                                                codes[#codes + 1] = result
-                                        elseif not err:match("macro exporting module only accepts macro definition") then
-                                                print(err)
-                                                os.exit(1)
-                                        end
+                                local result, err = to_lua(code, {
+                                        implicit_return_root = false,
+                                        reserve_line_number = false
+                                })
+                                if result then
+                                        codes[#codes + 1] = result
+                                elseif not err:match("macro exporting module only accepts macro definition") then
+                                        print(err)
+                                        os.exit(1)
                                 end
                         end
                         for code in text:gmatch("<pre>(.-)</pre>") do
-                                do
-                                        local result, err = to_lua(code:gsub("&lt;", "<"):gsub("&gt;", ">"), {
-                                                implicit_return_root = false,
-                                                reserve_line_number = false
-                                        })
-                                        if result then
-                                                codes[#codes + 1] = result
-                                        else
-                                                print(err)
-                                                os.exit(1)
-                                        end
+                                local result, err = to_lua(code:gsub("&lt;", "<"):gsub("&gt;", ">"), {
+                                        implicit_return_root = false,
+                                        reserve_line_number = false
+                                })
+                                if result then
+                                        codes[#codes + 1] = result
+                                else
+                                        print(err)
+                                        os.exit(1)
                                 end
                         end
                         local output <close> = (function()
diff --git a/spec/outputs/cond.lua b/spec/outputs/cond.lua
index acbf644..5a5aae5 100644
--- a/spec/outputs/cond.lua
+++ b/spec/outputs/cond.lua
@@ -113,17 +113,15 @@ local z = false
 if false then
         _ = one
 else
-        do
-                local x = true
-                if x then
-                        _ = two
+        local x = true
+        if x then
+                _ = two
+        else
+                z = true
+                if z then
+                        _ = three
                 else
-                        z = true
-                        if z then
-                                _ = three
-                        else
-                                _ = four
-                        end
+                        _ = four
                 end
         end
 end
@@ -131,33 +129,27 @@ local out
 if false then
         out = one
 else
-        do
-                local x = true
-                if x then
-                        out = two
+        local x = true
+        if x then
+                out = two
+        else
+                z = true
+                if z then
+                        out = three
                 else
-                        z = true
-                        if z then
-                                out = three
-                        else
-                                out = four
-                        end
+                        out = four
                 end
         end
 end
 local kzy
 kzy = function()
-        do
-                local something = true
-                if something then
-                        return 1
-                else
-                        do
-                                local another = false
-                                if another then
-                                        return 2
-                                end
-                        end
+        local something = true
+        if something then
+                return 1
+        else
+                local another = false
+                if another then
+                        return 2
                 end
         end
 end
@@ -314,12 +306,10 @@ do
         end
 end
 do
-        do
-                local _M = { }
-                if _M then
-                        local Thing = _M.Thing
-                        a, b = _M.a, _M.b
-                end
+        local _M = { }
+        if _M then
+                local Thing = _M.Thing
+                a, b = _M.a, _M.b
         end
 end
 do
diff --git a/spec/outputs/destructure.lua b/spec/outputs/destructure.lua
index 38f21ff..224ed2d 100644
--- a/spec/outputs/destructure.lua
+++ b/spec/outputs/destructure.lua
@@ -131,11 +131,9 @@ do
         end
 end
 do
-        do
-                local _with_0 = thing
-                local a, b = _with_0[1], _with_0[2]
-                print(a, b)
-        end
+        local _with_0 = thing
+        local a, b = _with_0[1], _with_0[2]
+        print(a, b)
 end
 do
         local thing = nil
@@ -314,11 +312,9 @@ do
                         _tmp_0 = _obj_0.func
                 end
                 if _tmp_0 == nil then
-                        do
-                                local _obj_0 = item
-                                if _obj_0 ~= nil then
-                                        _tmp_0 = _obj_0.defVal
-                                end
+                        local _obj_0 = item
+                        if _obj_0 ~= nil then
+                                _tmp_0 = _obj_0.defVal
                         end
                 end
                 a.b(function()
@@ -449,11 +445,9 @@ do
         end
         local y1, y4
         local y2, y3
-        do
-                local _obj_0, _obj_1 = f2()
-                y1, y4 = f1(), _obj_1
-                y2, y3 = _obj_0.y2, _obj_0.y3
-        end
+        local _obj_0, _obj_1 = f2()
+        y1, y4 = f1(), _obj_1
+        y2, y3 = _obj_0.y2, _obj_0.y3
 end
 do
         local v1, v2, v3, v4
@@ -483,11 +477,9 @@ do
 end
 do
         local value, value_meta
-        do
-                local _obj_0 = tb
-                value = _obj_0[name]
-                value_meta = getmetatable(_obj_0)[name]
-        end
+        local _obj_0 = tb
+        value = _obj_0[name]
+        value_meta = getmetatable(_obj_0)[name]
 end
 do
         local tostring, add
@@ -500,24 +492,22 @@ do
                         end)
                 end
         end
-        do
-                local _exp_0 = tb
-                local _type_0 = type(_exp_0)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                if _tab_0 then
-                        local name, meta_field
-                        do
-                                local _obj_0 = getmetatable(_exp_0)
-                                name = _obj_0.__name
-                                meta_field = _obj_0["123"]
-                                if name == nil then
-                                        name = "item"
-                                end
-                        end
-                        if meta_field ~= nil then
-                                print(name, meta_field)
+        local _exp_0 = tb
+        local _type_0 = type(_exp_0)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        if _tab_0 then
+                local name, meta_field
+                do
+                        local _obj_0 = getmetatable(_exp_0)
+                        name = _obj_0.__name
+                        meta_field = _obj_0["123"]
+                        if name == nil then
+                                name = "item"
                         end
                 end
+                if meta_field ~= nil then
+                        print(name, meta_field)
+                end
         end
 end
 do
@@ -599,52 +589,50 @@ do
                         print(add, field)
                 end
         end
-        do
-                local _exp_0 = tb
-                local _type_0 = type(_exp_0)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                if _tab_0 then
-                        do
-                                local _obj_0 = _exp_0.c
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        do
-                                                local _obj_1 = getmetatable(_obj_0)
-                                                local _type_2 = type(_obj_1)
-                                                if "table" == _type_2 or "userdata" == _type_2 then
-                                                        meta_field = _obj_1["abc"]
-                                                end
+        local _exp_0 = tb
+        local _type_0 = type(_exp_0)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        if _tab_0 then
+                do
+                        local _obj_0 = _exp_0.c
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                do
+                                        local _obj_1 = getmetatable(_obj_0)
+                                        local _type_2 = type(_obj_1)
+                                        if "table" == _type_2 or "userdata" == _type_2 then
+                                                meta_field = _obj_1["abc"]
                                         end
                                 end
                         end
-                        if meta_field == nil then
-                                meta_field = "def"
-                        end
+                end
+                if meta_field == nil then
+                        meta_field = "def"
+                end
+                do
+                        local _obj_0 = getmetatable(_exp_0)
                         do
-                                local _obj_0 = getmetatable(_exp_0)
-                                do
-                                        local _obj_1 = _obj_0[ [[any string]]]
-                                        local _type_1 = type(_obj_1)
-                                        if "table" == _type_1 or "userdata" == _type_1 then
-                                                abc = _obj_1.d
-                                        end
-                                end
-                                do
-                                        local _obj_1 = _obj_0['str']
-                                        local _type_1 = type(_obj_1)
-                                        if "table" == _type_1 or "userdata" == _type_1 then
-                                                def = _obj_1.e
-                                        end
-                                end
-                                if abc == nil then
-                                        abc = 123
+                                local _obj_1 = _obj_0[ [[any string]]]
+                                local _type_1 = type(_obj_1)
+                                if "table" == _type_1 or "userdata" == _type_1 then
+                                        abc = _obj_1.d
                                 end
-                                if def == nil then
-                                        def = { }
+                        end
+                        do
+                                local _obj_1 = _obj_0['str']
+                                local _type_1 = type(_obj_1)
+                                if "table" == _type_1 or "userdata" == _type_1 then
+                                        def = _obj_1.e
                                 end
                         end
-                        print(meta_field, abc, def)
+                        if abc == nil then
+                                abc = 123
+                        end
+                        if def == nil then
+                                def = { }
+                        end
                 end
+                print(meta_field, abc, def)
         end
 end
 return nil
diff --git a/spec/outputs/funcs.lua b/spec/outputs/funcs.lua
index c07989e..c1735c4 100644
--- a/spec/outputs/funcs.lua
+++ b/spec/outputs/funcs.lua
@@ -224,13 +224,11 @@ do
                 if item.field then
                         local value = item.field.get("abc")
                         if value then
-                                do
-                                        local _exp_0 = value:get()
-                                        if 123 == _exp_0 then
-                                                return false
-                                        elseif 456 == _exp_0 then
-                                                handle(item)
-                                        end
+                                local _exp_0 = value:get()
+                                if 123 == _exp_0 then
+                                        return false
+                                elseif 456 == _exp_0 then
+                                        handle(item)
                                 end
                         end
                 end
@@ -240,13 +238,11 @@ do
                 if item.field then
                         local value = item.field.get("abc")
                         if value then
-                                do
-                                        local _exp_0 = value:get()
-                                        if 123 == _exp_0 then
-                                                return false
-                                        elseif 456 == _exp_0 then
-                                                handle(item)
-                                        end
+                                local _exp_0 = value:get()
+                                if 123 == _exp_0 then
+                                        return false
+                                elseif 456 == _exp_0 then
+                                        handle(item)
                                 end
                         end
                 end
@@ -261,14 +257,12 @@ do
                                 local pwd = req.pwd
                                 if name ~= nil and pwd ~= nil then
                                         if name ~= "" then
-                                                do
-                                                        local user = DB:queryUser(name, pwd)
-                                                        if user then
-                                                                if user.status == "available" then
-                                                                        return {
-                                                                                success = true
-                                                                        }
-                                                                end
+                                                local user = DB:queryUser(name, pwd)
+                                                if user then
+                                                        if user.status == "available" then
+                                                                return {
+                                                                        success = true
+                                                                }
                                                         end
                                                 end
                                         end
diff --git a/spec/outputs/global.lua b/spec/outputs/global.lua
index 930ecf6..7e74387 100644
--- a/spec/outputs/global.lua
+++ b/spec/outputs/global.lua
@@ -3,29 +3,27 @@ do
         cool = "dad"
 end
 do
-        do
-                local _class_0
-                local _base_0 = {
-                        umm = "cool"
-                }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
-                end
-                _class_0 = setmetatable({
-                        __init = function() end,
-                        __base = _base_0,
-                        __name = "Something"
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                Something = _class_0
+        local _class_0
+        local _base_0 = {
+                umm = "cool"
+        }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
         end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "Something"
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        Something = _class_0
 end
 do
         local d
diff --git a/spec/outputs/import.lua b/spec/outputs/import.lua
index 270c7b7..ffe688b 100644
--- a/spec/outputs/import.lua
+++ b/spec/outputs/import.lua
@@ -30,16 +30,14 @@ do
 end
 if indent then
         local okay, well
-        do
-                local _obj_1 = tables[100]
-                okay, well = _obj_1.okay, (function()
-                        local _base_0 = _obj_1
-                        local _fn_0 = _base_0.well
-                        return _fn_0 and function(...)
-                                return _fn_0(_base_0, ...)
-                        end
-                end)()
-        end
+        local _obj_1 = tables[100]
+        okay, well = _obj_1.okay, (function()
+                local _base_0 = _obj_1
+                local _fn_0 = _base_0.well
+                return _fn_0 and function(...)
+                        return _fn_0(_base_0, ...)
+                end
+        end)()
 end
 do
         local a, b, c = z.a, z.b, z.c
@@ -68,16 +66,14 @@ do
                 item = _obj_1.item
         end
         local x1, y1, z1
-        do
-                local _obj_1 = require("mymodule")
-                x1, y1, z1 = _obj_1.x1, _obj_1.y1, (function()
-                        local _base_0 = _obj_1
-                        local _fn_0 = _base_0.z1
-                        return _fn_0 and function(...)
-                                return _fn_0(_base_0, ...)
-                        end
-                end)()
-        end
+        local _obj_1 = require("mymodule")
+        x1, y1, z1 = _obj_1.x1, _obj_1.y1, (function()
+                local _base_0 = _obj_1
+                local _fn_0 = _base_0.z1
+                return _fn_0 and function(...)
+                        return _fn_0(_base_0, ...)
+                end
+        end)()
 end
 do
         local p
@@ -86,16 +82,14 @@ do
                 p = _obj_1.p
         end
         local x1, y1, z1
-        do
-                local _obj_1 = require('mymodule')
-                x1, y1, z1 = _obj_1.x1, _obj_1.y1, (function()
-                        local _base_0 = _obj_1
-                        local _fn_0 = _base_0.z1
-                        return _fn_0 and function(...)
-                                return _fn_0(_base_0, ...)
-                        end
-                end)()
-        end
+        local _obj_1 = require('mymodule')
+        x1, y1, z1 = _obj_1.x1, _obj_1.y1, (function()
+                local _base_0 = _obj_1
+                local _fn_0 = _base_0.z1
+                return _fn_0 and function(...)
+                        return _fn_0(_base_0, ...)
+                end
+        end)()
 end
 do
         local a, b, c = z.a, z.b, z.c
diff --git a/spec/outputs/local.lua b/spec/outputs/local.lua
index 5004e75..5d215e0 100644
--- a/spec/outputs/local.lua
+++ b/spec/outputs/local.lua
@@ -98,50 +98,46 @@ do
                 Five = 6
                 One = _class_0
         end
-        do
-                local _class_0
-                local No
-                local _base_0 = { }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
-                end
-                _class_0 = setmetatable({
-                        __init = function() end,
-                        __base = _base_0,
-                        __name = "Two"
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                local self = _class_0;
-                do
-                        local _class_1
-                        local _base_1 = { }
-                        if _base_1.__index == nil then
-                                _base_1.__index = _base_1
-                        end
-                        _class_1 = setmetatable({
-                                __init = function() end,
-                                __base = _base_1,
-                                __name = "No"
-                        }, {
-                                __index = _base_1,
-                                __call = function(cls, ...)
-                                        local _self_0 = setmetatable({ }, _base_1)
-                                        cls.__init(_self_0, ...)
-                                        return _self_0
-                                end
-                        })
-                        _base_1.__class = _class_1
-                        No = _class_1
+        local _class_0
+        local No
+        local _base_0 = { }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "Two"
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
                 end
-                Two = _class_0
+        })
+        _base_0.__class = _class_0
+        local self = _class_0;
+        local _class_1
+        local _base_1 = { }
+        if _base_1.__index == nil then
+                _base_1.__index = _base_1
         end
+        _class_1 = setmetatable({
+                __init = function() end,
+                __base = _base_1,
+                __name = "No"
+        }, {
+                __index = _base_1,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_1)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_1.__class = _class_1
+        No = _class_1
+        Two = _class_0
 end
 do
         local _list_0 = { }
diff --git a/spec/outputs/loops.lua b/spec/outputs/loops.lua
index 79ef789..40e27b9 100644
--- a/spec/outputs/loops.lua
+++ b/spec/outputs/loops.lua
@@ -297,17 +297,15 @@ end
 do
         for i = 1, 10 do
                 repeat
-                        do
-                                local _with_0 = tb
-                                if _with_0 ~= nil then
-                                        _with_0.a = 1
-                                        if _with_0.b then
-                                                goto _continue_12
-                                        end
-                                        do
-                                                if _with_0.c then
-                                                        break
-                                                end
+                        local _with_0 = tb
+                        if _with_0 ~= nil then
+                                _with_0.a = 1
+                                if _with_0.b then
+                                        goto _continue_12
+                                end
+                                do
+                                        if _with_0.c then
+                                                break
                                         end
                                 end
                         end
diff --git a/spec/outputs/macro.lua b/spec/outputs/macro.lua
index f18baed..2ee3e0a 100644
--- a/spec/outputs/macro.lua
+++ b/spec/outputs/macro.lua
@@ -1,4 +1,6 @@
-assert(item == nil)
+do
+        assert(item == nil)
+end
 local v = (item == nil)
 if f1() then
         print("OK")
@@ -9,86 +11,86 @@ end
 local item
 do
         local _src_, _dst_
-        do
-                _dst_ = {
-                        pos = { },
-                        flags = flags:tonumber()
-                }
-                do
-                        _src_ = self
-                        _dst_.id = _src_.id
-                        _dst_.connections = _src_.connections
-                        _dst_.pos.x = _src_.pos.x
-                        _dst_.pos.y = _src_.pos.y
-                        _dst_.pos.z = _src_.pos.z
-                end
-                item = _dst_
-        end
+        _dst_ = {
+                pos = { },
+                flags = flags:tonumber()
+        }
+        _src_ = self
+        _dst_.id = _src_.id
+        _dst_.connections = _src_.connections
+        _dst_.pos.x = _src_.pos.x
+        _dst_.pos.y = _src_.pos.y
+        _dst_.pos.z = _src_.pos.z
+        item = _dst_
 end
 if (x == "Apple" or x == "Pig" or x == "Dog") then
         print("exist")
 end
-local _list_0 = (function()
-        local _accum_0 = { }
-        local _len_0 = 1
+do
         local _list_0 = (function()
-                local _accum_1 = { }
-                local _len_1 = 1
-                local _list_0 = {
-                        1,
-                        2,
-                        3
-                }
+                local _accum_0 = { }
+                local _len_0 = 1
+                local _list_0 = (function()
+                        local _accum_1 = { }
+                        local _len_1 = 1
+                        local _list_0 = {
+                                1,
+                                2,
+                                3
+                        }
+                        for _index_0 = 1, #_list_0 do
+                                local _ = _list_0[_index_0]
+                                _accum_1[_len_1] = _ * 2
+                                _len_1 = _len_1 + 1
+                        end
+                        return _accum_1
+                end)()
                 for _index_0 = 1, #_list_0 do
                         local _ = _list_0[_index_0]
-                        _accum_1[_len_1] = _ * 2
-                        _len_1 = _len_1 + 1
+                        if _ > 4 then
+                                _accum_0[_len_0] = _
+                                _len_0 = _len_0 + 1
+                        end
                 end
-                return _accum_1
+                return _accum_0
         end)()
         for _index_0 = 1, #_list_0 do
                 local _ = _list_0[_index_0]
-                if _ > 4 then
-                        _accum_0[_len_0] = _
-                        _len_0 = _len_0 + 1
-                end
+                print(_)
         end
-        return _accum_0
-end)()
-for _index_0 = 1, #_list_0 do
-        local _ = _list_0[_index_0]
-        print(_)
 end
-local _list_1 = (function()
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_1 = (function()
-                local _accum_1 = { }
-                local _len_1 = 1
-                local _list_1 = {
-                        1,
-                        2,
-                        3
-                }
-                for _index_0 = 1, #_list_1 do
-                        local _ = _list_1[_index_0]
-                        _accum_1[_len_1] = _ * 2
-                        _len_1 = _len_1 + 1
+do
+        local _list_0 = (function()
+                local _accum_0 = { }
+                local _len_0 = 1
+                local _list_0 = (function()
+                        local _accum_1 = { }
+                        local _len_1 = 1
+                        local _list_0 = {
+                                1,
+                                2,
+                                3
+                        }
+                        for _index_0 = 1, #_list_0 do
+                                local _ = _list_0[_index_0]
+                                _accum_1[_len_1] = _ * 2
+                                _len_1 = _len_1 + 1
+                        end
+                        return _accum_1
+                end)()
+                for _index_0 = 1, #_list_0 do
+                        local _ = _list_0[_index_0]
+                        if _ > 4 then
+                                _accum_0[_len_0] = _
+                                _len_0 = _len_0 + 1
+                        end
                 end
-                return _accum_1
+                return _accum_0
         end)()
-        for _index_0 = 1, #_list_1 do
-                local _ = _list_1[_index_0]
-                if _ > 4 then
-                        _accum_0[_len_0] = _
-                        _len_0 = _len_0 + 1
-                end
+        for _index_0 = 1, #_list_0 do
+                local _ = _list_0[_index_0]
+                print(_)
         end
-        return _accum_0
-end)()
-for _index_0 = 1, #_list_1 do
-        local _ = _list_1[_index_0]
-        print(_)
 end
 local val
 do
@@ -96,13 +98,13 @@ do
         do
                 local _accum_0 = { }
                 local _len_0 = 1
-                local _list_2 = {
+                local _list_0 = {
                         1,
                         2,
                         3
                 }
-                for _index_0 = 1, #_list_2 do
-                        local _ = _list_2[_index_0]
+                for _index_0 = 1, #_list_0 do
+                        local _ = _list_0[_index_0]
                         _accum_0[_len_0] = _ * 2
                         _len_0 = _len_0 + 1
                 end
@@ -134,7 +136,9 @@ do
         end
         val = _4
 end
-(1 + 2):call(123)
+do
+        (1 + 2):call(123)
+end
 local res = (1 + 2)
 local f
 f = function(x)
@@ -210,40 +214,44 @@ local a = ((((_({
         return self * 2
 end)):filter(function(self)
         return self > 3
-end)):value();
-((((_({
-        1,
-        2,
-        3,
-        4,
-        -2,
-        3
-})):chain()):map(function(self)
-        return self * 2
-end)):filter(function(self)
-        return self > 3
-end)):each(function(self)
-        return print(self)
-end)
+end)):value()
+do
+        ((((_({
+                1,
+                2,
+                3,
+                4,
+                -2,
+                3
+        })):chain()):map(function(self)
+                return self * 2
+        end)):filter(function(self)
+                return self > 3
+        end)):each(function(self)
+                return print(self)
+        end)
+end
 local result = ((((((origin.transform.root.gameObject:Parents()):Descendants()):SelectEnable()):SelectVisible()):TagEqual("fx")):Where(function(x)
         return x.name:EndsWith("(Clone)")
 end)):Destroy()
 do
-        local _1
-        _1 = origin.transform.root.gameObject:Parents()
-        local _2
-        _2 = _1:Descendants()
-        local _3
-        _3 = _2:SelectEnable()
-        local _4
-        _4 = _3:SelectVisible()
-        local _5
-        _5 = _4:TagEqual("fx")
-        local _6
-        _6 = _5:Where(function(x)
-                return x.name:EndsWith("(Clone)")
-        end)
-        _6:Destroy()
+        do
+                local _1
+                _1 = origin.transform.root.gameObject:Parents()
+                local _2
+                _2 = _1:Descendants()
+                local _3
+                _3 = _2:SelectEnable()
+                local _4
+                _4 = _3:SelectVisible()
+                local _5
+                _5 = _4:TagEqual("fx")
+                local _6
+                _6 = _5:Where(function(x)
+                        return x.name:EndsWith("(Clone)")
+                end)
+                _6:Destroy()
+        end
 end
 origin.transform.root.gameObject:Parents():Descendants():SelectEnable():SelectVisible():TagEqual("fx"):Where(function(x)
         return x.name:EndsWith("(Clone)")
@@ -278,7 +286,9 @@ print((setmetatable({
         end
 }))
 print("current line: " .. tostring(268))
+do
 -- TODO
+end
 do
         print(1)
 end
@@ -293,5 +303,7 @@ _1 = function()
         end
         return _accum_0
 end
-print('abc')
-return 123
+do
+        print('abc')
+        return 123
+end
diff --git a/spec/outputs/metatable.lua b/spec/outputs/metatable.lua
index 9f95787..78de433 100644
--- a/spec/outputs/metatable.lua
+++ b/spec/outputs/metatable.lua
@@ -48,19 +48,17 @@ do
 end
 do
         local x, new, var, close, closeA, num, add, sub
+        local _obj_0, _obj_1
+        x, _obj_0, _obj_1 = 123, a.b.c, func()
+        new, var = _obj_0.new, _obj_0.var
         do
-                local _obj_0, _obj_1
-                x, _obj_0, _obj_1 = 123, a.b.c, func()
-                new, var = _obj_0.new, _obj_0.var
-                do
-                        local _obj_2 = getmetatable(_obj_0)
-                        close, closeA = _obj_2.__close, _obj_2.__close
-                end
-                num = _obj_1.num
-                do
-                        local _obj_2 = getmetatable(_obj_1)
-                        add, sub = _obj_2.__add, _obj_2.__sub
-                end
+                local _obj_2 = getmetatable(_obj_0)
+                close, closeA = _obj_2.__close, _obj_2.__close
+        end
+        num = _obj_1.num
+        do
+                local _obj_2 = getmetatable(_obj_1)
+                add, sub = _obj_2.__add, _obj_2.__sub
         end
 end
 setmetatable(a.b, { })
diff --git a/spec/outputs/multiline_chain.lua b/spec/outputs/multiline_chain.lua
index 5edad88..ef64906 100644
--- a/spec/outputs/multiline_chain.lua
+++ b/spec/outputs/multiline_chain.lua
@@ -82,15 +82,13 @@ do
                 _with_0:itemMethodC(i)
         end
         if not _with_0.b then
-                do
-                        local _accum_0 = { }
-                        local _len_0 = 1
-                        while _with_0.itemFieldD do
-                                _accum_0[_len_0] = _with_0:itemNext():get()
-                                _len_0 = _len_0 + 1
-                        end
-                        _with_0.c = _accum_0
+                local _accum_0 = { }
+                local _len_0 = 1
+                while _with_0.itemFieldD do
+                        _accum_0[_len_0] = _with_0:itemNext():get()
+                        _len_0 = _len_0 + 1
                 end
+                _with_0.c = _accum_0
         end
 end
 return nil
diff --git a/spec/outputs/nil_coalescing.lua b/spec/outputs/nil_coalescing.lua
index e1547df..2279853 100644
--- a/spec/outputs/nil_coalescing.lua
+++ b/spec/outputs/nil_coalescing.lua
@@ -1,23 +1,19 @@
 do
         local a
-        do
-                local _exp_0 = b
-                if _exp_0 ~= nil then
-                        a = _exp_0
-                else
-                        a = c
-                end
+        local _exp_0 = b
+        if _exp_0 ~= nil then
+                a = _exp_0
+        else
+                a = c
         end
 end
 do
         local a
-        do
-                local _exp_0 = b
-                if _exp_0 ~= nil then
-                        a = _exp_0.a
-                else
-                        a = c.a
-                end
+        local _exp_0 = b
+        if _exp_0 ~= nil then
+                a = _exp_0.a
+        else
+                a = c.a
         end
 end
 do
@@ -50,23 +46,21 @@ do
 end
 do
         local a
-        do
-                local _exp_0 = b
-                if _exp_0 ~= nil then
-                        a = _exp_0
-                else
-                        do
-                                local _exp_1 = c
-                                if _exp_1 ~= nil then
-                                        a = _exp_1
-                                else
-                                        do
-                                                local _exp_2 = d
-                                                if _exp_2 ~= nil then
-                                                        a = _exp_2
-                                                else
-                                                        a = e
-                                                end
+        local _exp_0 = b
+        if _exp_0 ~= nil then
+                a = _exp_0
+        else
+                do
+                        local _exp_1 = c
+                        if _exp_1 ~= nil then
+                                a = _exp_1
+                        else
+                                do
+                                        local _exp_2 = d
+                                        if _exp_2 ~= nil then
+                                                a = _exp_2
+                                        else
+                                                a = e
                                         end
                                 end
                         end
@@ -84,18 +78,14 @@ do
         end)())
 end
 do
-        do
-                local _with_0
-                do
-                        local _exp_0 = funcA()
-                        if _exp_0 ~= nil then
-                                _with_0 = _exp_0
-                        else
-                                _with_0 = funcB()
-                        end
-                end
-                print(_with_0.field)
+        local _with_0
+        local _exp_0 = funcA()
+        if _exp_0 ~= nil then
+                _with_0 = _exp_0
+        else
+                _with_0 = funcB()
         end
+        print(_with_0.field)
 end
 do
         local a = 1 + 2 + (function()
@@ -137,18 +127,16 @@ do
 end
 do
         local a
-        do
-                local _exp_0 = 1
-                if _exp_0 ~= nil then
-                        a = _exp_0
-                else
-                        do
-                                local _exp_1 = 2
-                                if _exp_1 ~= nil then
-                                        a = _exp_1
-                                else
-                                        a = 3
-                                end
+        local _exp_0 = 1
+        if _exp_0 ~= nil then
+                a = _exp_0
+        else
+                do
+                        local _exp_1 = 2
+                        if _exp_1 ~= nil then
+                                a = _exp_1
+                        else
+                                a = 3
                         end
                 end
         end
diff --git a/spec/outputs/stub.lua b/spec/outputs/stub.lua
index ff867ba..a3a27e3 100644
--- a/spec/outputs/stub.lua
+++ b/spec/outputs/stub.lua
@@ -15,12 +15,10 @@ end
 print(fn())
 print(x:val());
 (function(...)
-        do
-                local _base_0 = hello(...)
-                local _fn_0 = _base_0.world
-                x = _fn_0 and function(...)
-                        return _fn_0(_base_0, ...)
-                end
+        local _base_0 = hello(...)
+        local _fn_0 = _base_0.world
+        x = _fn_0 and function(...)
+                return _fn_0(_base_0, ...)
         end
 end)()
 return nil
diff --git a/spec/outputs/switch.lua b/spec/outputs/switch.lua
index bbdf794..e4dedc9 100644
--- a/spec/outputs/switch.lua
+++ b/spec/outputs/switch.lua
@@ -45,13 +45,11 @@ do
 end
 do
         local _with_0 = something
-        do
-                local _exp_0 = _with_0:value()
-                if _with_0.okay == _exp_0 then
-                        local _ = "world"
-                else
-                        local _ = "yesh"
-                end
+        local _exp_0 = _with_0:value()
+        if _with_0.okay == _exp_0 then
+                local _ = "world"
+        else
+                local _ = "yesh"
         end
 end
 fix(this)
@@ -106,66 +104,64 @@ do
                         }
                 }
         }
-        do
-                local _type_0 = type(dict)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                if _tab_0 then
-                        local first = dict[1]
-                        local one
-                        do
-                                local _obj_0 = dict[2]
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        one = _obj_0[1]
-                                end
+        local _type_0 = type(dict)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        if _tab_0 then
+                local first = dict[1]
+                local one
+                do
+                        local _obj_0 = dict[2]
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                one = _obj_0[1]
                         end
-                        local two
-                        do
-                                local _obj_0 = dict[2]
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        two = _obj_0[2]
-                                end
+                end
+                local two
+                do
+                        local _obj_0 = dict[2]
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                two = _obj_0[2]
                         end
-                        local three
-                        do
-                                local _obj_0 = dict[2]
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        three = _obj_0[3]
-                                end
+                end
+                local three
+                do
+                        local _obj_0 = dict[2]
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                three = _obj_0[3]
                         end
-                        local c
-                        do
-                                local _obj_0 = dict.a
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        do
-                                                local _obj_1 = _obj_0.b
-                                                local _type_2 = type(_obj_1)
-                                                if "table" == _type_2 or "userdata" == _type_2 then
-                                                        c = _obj_1.c
-                                                end
+                end
+                local c
+                do
+                        local _obj_0 = dict.a
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                do
+                                        local _obj_1 = _obj_0.b
+                                        local _type_2 = type(_obj_1)
+                                        if "table" == _type_2 or "userdata" == _type_2 then
+                                                c = _obj_1.c
                                         end
                                 end
                         end
-                        local z
-                        do
-                                local _obj_0 = dict.x
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        do
-                                                local _obj_1 = _obj_0.y
-                                                local _type_2 = type(_obj_1)
-                                                if "table" == _type_2 or "userdata" == _type_2 then
-                                                        z = _obj_1.z
-                                                end
+                end
+                local z
+                do
+                        local _obj_0 = dict.x
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                do
+                                        local _obj_1 = _obj_0.y
+                                        local _type_2 = type(_obj_1)
+                                        if "table" == _type_2 or "userdata" == _type_2 then
+                                                z = _obj_1.z
                                         end
                                 end
                         end
-                        if first ~= nil and one ~= nil and two ~= nil and three ~= nil and c ~= nil and z ~= nil then
-                                print(first, one, two, three, c, z)
-                        end
+                end
+                if first ~= nil and one ~= nil and two ~= nil and three ~= nil and c ~= nil and z ~= nil then
+                        print(first, one, two, three, c, z)
                 end
         end
 end
@@ -183,56 +179,54 @@ do
         }
         for _index_0 = 1, #items do
                 local item = items[_index_0]
-                do
-                        local _type_0 = type(item)
-                        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                        local _match_0 = false
+                local _type_0 = type(item)
+                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+                local _match_0 = false
+                if _tab_0 then
+                        local x = item.x
+                        local y = item.y
+                        if x ~= nil and y ~= nil then
+                                _match_0 = true
+                                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
+                        end
+                end
+                if not _match_0 then
+                        local _match_1 = false
                         if _tab_0 then
-                                local x = item.x
-                                local y = item.y
-                                if x ~= nil and y ~= nil then
-                                        _match_0 = true
-                                        print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
+                                local width = item.width
+                                local height = item.height
+                                if width ~= nil and height ~= nil then
+                                        _match_1 = true
+                                        print("Size " .. tostring(width) .. ", " .. tostring(height))
                                 end
                         end
-                        if not _match_0 then
-                                local _match_1 = false
-                                if _tab_0 then
-                                        local width = item.width
-                                        local height = item.height
-                                        if width ~= nil and height ~= nil then
-                                                _match_1 = true
-                                                print("Size " .. tostring(width) .. ", " .. tostring(height))
+                        if not _match_1 then
+                                if false == item then
+                                        print("None")
+                                else
+                                        local _match_2 = false
+                                        if _tab_0 then
+                                                local cls = item.__class
+                                                if cls ~= nil then
+                                                        _match_2 = true
+                                                        if ClassA == cls then
+                                                                print("Object A")
+                                                        elseif ClassB == cls then
+                                                                print("Object B")
+                                                        end
+                                                end
                                         end
-                                end
-                                if not _match_1 then
-                                        if false == item then
-                                                print("None")
-                                        else
-                                                local _match_2 = false
+                                        if not _match_2 then
+                                                local _match_3 = false
                                                 if _tab_0 then
-                                                        local cls = item.__class
-                                                        if cls ~= nil then
-                                                                _match_2 = true
-                                                                if ClassA == cls then
-                                                                        print("Object A")
-                                                                elseif ClassB == cls then
-                                                                        print("Object B")
-                                                                end
+                                                        local mt = getmetatable(item)
+                                                        if mt ~= nil then
+                                                                _match_3 = true
+                                                                print("A table with metatable")
                                                         end
                                                 end
-                                                if not _match_2 then
-                                                        local _match_3 = false
-                                                        if _tab_0 then
-                                                                local mt = getmetatable(item)
-                                                                if mt ~= nil then
-                                                                        _match_3 = true
-                                                                        print("A table with metatable")
-                                                                end
-                                                        end
-                                                        if not _match_3 then
-                                                                print("item not accepted!")
-                                                        end
+                                                if not _match_3 then
+                                                        print("item not accepted!")
                                                 end
                                         end
                                 end
@@ -271,72 +265,66 @@ do
                         end
                 end
         end
-        do
-                local _type_0 = type(tb)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                local _match_0 = false
-                if _tab_0 then
-                        local a = tb.a
-                        local b = tb.b
-                        if a ~= nil and b ~= nil then
-                                _match_0 = true
-                                print(a, b)
-                        end
-                end
-                if not _match_0 then
-                        print("not matched")
+        local _type_0 = type(tb)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        local _match_0 = false
+        if _tab_0 then
+                local a = tb.a
+                local b = tb.b
+                if a ~= nil and b ~= nil then
+                        _match_0 = true
+                        print(a, b)
                 end
         end
+        if not _match_0 then
+                print("not matched")
+        end
 end
 do
         local tb = {
                 x = "abc"
         }
-        do
-                local _type_0 = type(tb)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                local _match_0 = false
+        local _type_0 = type(tb)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        local _match_0 = false
+        if _tab_0 then
+                local x = tb.x
+                local y = tb.y
+                if x ~= nil and y ~= nil then
+                        _match_0 = true
+                        print("x: " .. tostring(x) .. " with y: " .. tostring(y))
+                end
+        end
+        if not _match_0 then
                 if _tab_0 then
                         local x = tb.x
-                        local y = tb.y
-                        if x ~= nil and y ~= nil then
-                                _match_0 = true
-                                print("x: " .. tostring(x) .. " with y: " .. tostring(y))
-                        end
-                end
-                if not _match_0 then
-                        if _tab_0 then
-                                local x = tb.x
-                                if x ~= nil then
-                                        print("x: " .. tostring(x) .. " only")
-                                end
+                        if x ~= nil then
+                                print("x: " .. tostring(x) .. " only")
                         end
                 end
         end
 end
 do
         local matched
-        do
-                local _exp_0 = tb
-                if 1 == _exp_0 then
-                        matched = "1"
-                else
-                        local _type_0 = type(_exp_0)
-                        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                        local _match_0 = false
-                        if _tab_0 then
-                                local x = _exp_0.x
-                                if x ~= nil then
-                                        _match_0 = true
-                                        matched = x
-                                end
+        local _exp_0 = tb
+        if 1 == _exp_0 then
+                matched = "1"
+        else
+                local _type_0 = type(_exp_0)
+                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+                local _match_0 = false
+                if _tab_0 then
+                        local x = _exp_0.x
+                        if x ~= nil then
+                                _match_0 = true
+                                matched = x
                         end
-                        if not _match_0 then
-                                if false == _exp_0 then
-                                        matched = "false"
-                                else
-                                        matched = nil
-                                end
+                end
+                if not _match_0 then
+                        if false == _exp_0 then
+                                matched = "false"
+                        else
+                                matched = nil
                         end
                 end
         end
@@ -346,90 +334,84 @@ do
         if nil == _exp_0 then
                 return "invalid"
         else
-                do
-                        local _type_0 = type(_exp_0)
-                        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                        local _match_0 = false
-                        if _tab_0 then
-                                local a = _exp_0.a
-                                local b = _exp_0.b
-                                if a ~= nil and b ~= nil then
-                                        _match_0 = true
-                                        return tostring(a + b)
-                                end
+                local _type_0 = type(_exp_0)
+                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+                local _match_0 = false
+                if _tab_0 then
+                        local a = _exp_0.a
+                        local b = _exp_0.b
+                        if a ~= nil and b ~= nil then
+                                _match_0 = true
+                                return tostring(a + b)
                         end
-                        if not _match_0 then
-                                if 1 == _exp_0 or 2 == _exp_0 or 3 == _exp_0 or 4 == _exp_0 or 5 == _exp_0 then
-                                        return "number 1 - 5"
-                                else
-                                        local _match_1 = false
-                                        if _tab_0 then
-                                                local matchAnyTable = _exp_0.matchAnyTable
-                                                if matchAnyTable == nil then
-                                                        matchAnyTable = "fallback"
-                                                end
-                                                _match_1 = true
-                                                return matchAnyTable
-                                        end
-                                        if not _match_1 then
-                                                return "should not reach here unless it is not a table"
+                end
+                if not _match_0 then
+                        if 1 == _exp_0 or 2 == _exp_0 or 3 == _exp_0 or 4 == _exp_0 or 5 == _exp_0 then
+                                return "number 1 - 5"
+                        else
+                                local _match_1 = false
+                                if _tab_0 then
+                                        local matchAnyTable = _exp_0.matchAnyTable
+                                        if matchAnyTable == nil then
+                                                matchAnyTable = "fallback"
                                         end
+                                        _match_1 = true
+                                        return matchAnyTable
+                                end
+                                if not _match_1 then
+                                        return "should not reach here unless it is not a table"
                                 end
                         end
                 end
         end
 end
 do
-        do
-                local _exp_0 = y
-                local _type_0 = type(_exp_0)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                if _tab_0 then
-                        local mt = (function()
-                                local _obj_0 = _exp_0.x
-                                if _obj_0 ~= nil then
-                                        return getmetatable(_obj_0)
-                                end
-                                return nil
-                        end)()
-                        if mt ~= nil then
-                                print(mt)
+        local _exp_0 = y
+        local _type_0 = type(_exp_0)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        if _tab_0 then
+                local mt = (function()
+                        local _obj_0 = _exp_0.x
+                        if _obj_0 ~= nil then
+                                return getmetatable(_obj_0)
                         end
+                        return nil
+                end)()
+                if mt ~= nil then
+                        print(mt)
                 end
         end
 end
 do
-        do
-                local _exp_0 = tb
-                local _type_0 = type(_exp_0)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                local _match_0 = false
-                if _tab_0 then
-                        local item
-                        do
-                                local _obj_0 = _exp_0[1]
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        item = _obj_0[1]
-                                end
-                        end
-                        if item ~= nil then
-                                _match_0 = true
-                                print(item)
+        local _exp_0 = tb
+        local _type_0 = type(_exp_0)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        local _match_0 = false
+        if _tab_0 then
+                local item
+                do
+                        local _obj_0 = _exp_0[1]
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                item = _obj_0[1]
                         end
                 end
-                if not _match_0 then
-                        if _tab_0 then
-                                local a = _exp_0[1]
-                                local b = _exp_0[2]
-                                if a == nil then
-                                        a = 1
-                                end
-                                if b == nil then
-                                        b = "abc"
-                                end
-                                print(a, b)
+                if item ~= nil then
+                        _match_0 = true
+                        print(item)
+                end
+        end
+        if not _match_0 then
+                if _tab_0 then
+                        local a = _exp_0[1]
+                        local b = _exp_0[2]
+                        if a == nil then
+                                a = 1
+                        end
+                        if b == nil then
+                                b = "abc"
                         end
+                        print(a, b)
                 end
         end
 end
diff --git a/spec/outputs/syntax.lua b/spec/outputs/syntax.lua
index 20b8469..cfe63eb 100644
--- a/spec/outputs/syntax.lua
+++ b/spec/outputs/syntax.lua
@@ -217,15 +217,11 @@ else
 end
 do
         local _with_0 = tb
-        do
-                local _obj_2 = _with_0.b.c
-                do
-                        local _with_1 = vec
-                        _with_1.x = 1
-                        _with_1.y = 2
-                        _obj_2[#_obj_2 + 1] = _with_1
-                end
-        end
+        local _obj_2 = _with_0.b.c
+        local _with_1 = vec
+        _with_1.x = 1
+        _with_1.y = 2
+        _obj_2[#_obj_2 + 1] = _with_1
 end
 do
         local _obj_2 = a.b.c.d:f().g
diff --git a/spec/outputs/tables.lua b/spec/outputs/tables.lua
index 911f677..f358811 100644
--- a/spec/outputs/tables.lua
+++ b/spec/outputs/tables.lua
@@ -430,157 +430,141 @@ do
 end
 do
         local tbMixA
-        do
-                local _tab_0 = { }
-                local _obj_0
-                do
-                        local _accum_0 = { }
-                        local _len_0 = 1
-                        for i = 1, 10 do
-                                _accum_0[_len_0] = i
-                                _len_0 = _len_0 + 1
-                        end
-                        _obj_0 = _accum_0
-                end
-                local _idx_0 = 1
-                for _key_0, _value_0 in pairs(_obj_0) do
-                        if _idx_0 == _key_0 then
-                                _tab_0[#_tab_0 + 1] = _value_0
-                                _idx_0 = _idx_0 + 1
-                        else
-                                _tab_0[_key_0] = _value_0
-                        end
+        local _tab_0 = { }
+        local _obj_0
+        local _accum_0 = { }
+        local _len_0 = 1
+        for i = 1, 10 do
+                _accum_0[_len_0] = i
+                _len_0 = _len_0 + 1
+        end
+        _obj_0 = _accum_0
+        local _idx_0 = 1
+        for _key_0, _value_0 in pairs(_obj_0) do
+                if _idx_0 == _key_0 then
+                        _tab_0[#_tab_0 + 1] = _value_0
+                        _idx_0 = _idx_0 + 1
+                else
+                        _tab_0[_key_0] = _value_0
                 end
-                _tab_0[#_tab_0 + 1] = 11
-                tbMixA = _tab_0
         end
+        _tab_0[#_tab_0 + 1] = 11
+        tbMixA = _tab_0
 end
 do
         local tbMixA
-        do
-                local _tab_0 = { }
-                local _obj_0
-                do
-                        local _accum_0 = { }
-                        local _len_0 = 1
-                        for i = 1, 10 do
-                                _accum_0[_len_0] = i
-                                _len_0 = _len_0 + 1
-                        end
-                        _obj_0 = _accum_0
-                end
-                local _idx_0 = #_tab_0 + 1
-                for _index_0 = 1, #_obj_0 do
-                        local _value_0 = _obj_0[_index_0]
-                        _tab_0[_idx_0] = _value_0
-                        _idx_0 = _idx_0 + 1
-                end
-                _tab_0[#_tab_0 + 1] = 11
-                tbMixA = _tab_0
+        local _tab_0 = { }
+        local _obj_0
+        local _accum_0 = { }
+        local _len_0 = 1
+        for i = 1, 10 do
+                _accum_0[_len_0] = i
+                _len_0 = _len_0 + 1
+        end
+        _obj_0 = _accum_0
+        local _idx_0 = #_tab_0 + 1
+        for _index_0 = 1, #_obj_0 do
+                local _value_0 = _obj_0[_index_0]
+                _tab_0[_idx_0] = _value_0
+                _idx_0 = _idx_0 + 1
         end
+        _tab_0[#_tab_0 + 1] = 11
+        tbMixA = _tab_0
 end
 do
         local tbMixB
-        do
-                local _tab_0 = { }
-                local _obj_0 = ...
-                local _idx_0 = 1
-                for _key_0, _value_0 in pairs(_obj_0) do
-                        if _idx_0 == _key_0 then
-                                _tab_0[#_tab_0 + 1] = _value_0
-                                _idx_0 = _idx_0 + 1
-                        else
-                                _tab_0[_key_0] = _value_0
-                        end
+        local _tab_0 = { }
+        local _obj_0 = ...
+        local _idx_0 = 1
+        for _key_0, _value_0 in pairs(_obj_0) do
+                if _idx_0 == _key_0 then
+                        _tab_0[#_tab_0 + 1] = _value_0
+                        _idx_0 = _idx_0 + 1
+                else
+                        _tab_0[_key_0] = _value_0
                 end
-                local _obj_1 = {
-                        ...
-                }
-                local _idx_1 = 1
-                for _key_0, _value_0 in pairs(_obj_1) do
-                        if _idx_1 == _key_0 then
-                                _tab_0[#_tab_0 + 1] = _value_0
-                                _idx_1 = _idx_1 + 1
-                        else
-                                _tab_0[_key_0] = _value_0
-                        end
+        end
+        local _obj_1 = {
+                ...
+        }
+        local _idx_1 = 1
+        for _key_0, _value_0 in pairs(_obj_1) do
+                if _idx_1 == _key_0 then
+                        _tab_0[#_tab_0 + 1] = _value_0
+                        _idx_1 = _idx_1 + 1
+                else
+                        _tab_0[_key_0] = _value_0
                 end
-                local _obj_2
-                do
-                        local _tab_1 = { }
-                        local _obj_3 = ...
-                        local _idx_2 = 1
-                        for _key_0, _value_0 in pairs(_obj_3) do
-                                if _idx_2 == _key_0 then
-                                        _tab_1[#_tab_1 + 1] = _value_0
-                                        _idx_2 = _idx_2 + 1
-                                else
-                                        _tab_1[_key_0] = _value_0
-                                end
-                        end
-                        _obj_2 = _tab_1
+        end
+        local _obj_2
+        local _tab_1 = { }
+        local _obj_3 = ...
+        local _idx_2 = 1
+        for _key_0, _value_0 in pairs(_obj_3) do
+                if _idx_2 == _key_0 then
+                        _tab_1[#_tab_1 + 1] = _value_0
+                        _idx_2 = _idx_2 + 1
+                else
+                        _tab_1[_key_0] = _value_0
                 end
-                local _idx_2 = 1
-                for _key_0, _value_0 in pairs(_obj_2) do
-                        if _idx_2 == _key_0 then
-                                _tab_0[#_tab_0 + 1] = _value_0
-                                _idx_2 = _idx_2 + 1
-                        else
-                                _tab_0[_key_0] = _value_0
-                        end
+        end
+        _obj_2 = _tab_1
+        local _idx_2 = 1
+        for _key_0, _value_0 in pairs(_obj_2) do
+                if _idx_2 == _key_0 then
+                        _tab_0[#_tab_0 + 1] = _value_0
+                        _idx_2 = _idx_2 + 1
+                else
+                        _tab_0[_key_0] = _value_0
                 end
-                _tab_0[#_tab_0 + 1] = 1
-                _tab_0[#_tab_0 + 1] = 2
-                _tab_0[#_tab_0 + 1] = 3
-                tbMixB = _tab_0
         end
+        _tab_0[#_tab_0 + 1] = 1
+        _tab_0[#_tab_0 + 1] = 2
+        _tab_0[#_tab_0 + 1] = 3
+        tbMixB = _tab_0
 end
 do
         local tbMixB
-        do
-                local _tab_0 = { }
-                local _obj_0 = ...
-                local _idx_0 = #_tab_0 + 1
-                for _index_0 = 1, #_obj_0 do
-                        local _value_0 = _obj_0[_index_0]
-                        _tab_0[_idx_0] = _value_0
-                        _idx_0 = _idx_0 + 1
-                end
-                local _obj_1 = {
-                        ...
-                }
-                local _idx_1 = #_tab_0 + 1
-                for _index_0 = 1, #_obj_1 do
-                        local _value_0 = _obj_1[_index_0]
-                        _tab_0[_idx_1] = _value_0
-                        _idx_1 = _idx_1 + 1
-                end
-                local _obj_2
-                do
-                        local _tab_1 = { }
-                        local _obj_3 = ...
-                        local _idx_2 = 1
-                        for _key_0, _value_0 in pairs(_obj_3) do
-                                if _idx_2 == _key_0 then
-                                        _tab_1[#_tab_1 + 1] = _value_0
-                                        _idx_2 = _idx_2 + 1
-                                else
-                                        _tab_1[_key_0] = _value_0
-                                end
-                        end
-                        _obj_2 = _tab_1
-                end
-                local _idx_2 = #_tab_0 + 1
-                for _index_0 = 1, #_obj_2 do
-                        local _value_0 = _obj_2[_index_0]
-                        _tab_0[_idx_2] = _value_0
+        local _tab_0 = { }
+        local _obj_0 = ...
+        local _idx_0 = #_tab_0 + 1
+        for _index_0 = 1, #_obj_0 do
+                local _value_0 = _obj_0[_index_0]
+                _tab_0[_idx_0] = _value_0
+                _idx_0 = _idx_0 + 1
+        end
+        local _obj_1 = {
+                ...
+        }
+        local _idx_1 = #_tab_0 + 1
+        for _index_0 = 1, #_obj_1 do
+                local _value_0 = _obj_1[_index_0]
+                _tab_0[_idx_1] = _value_0
+                _idx_1 = _idx_1 + 1
+        end
+        local _obj_2
+        local _tab_1 = { }
+        local _obj_3 = ...
+        local _idx_2 = 1
+        for _key_0, _value_0 in pairs(_obj_3) do
+                if _idx_2 == _key_0 then
+                        _tab_1[#_tab_1 + 1] = _value_0
                         _idx_2 = _idx_2 + 1
+                else
+                        _tab_1[_key_0] = _value_0
                 end
-                _tab_0[#_tab_0 + 1] = 1
-                _tab_0[#_tab_0 + 1] = 2
-                _tab_0[#_tab_0 + 1] = 3
-                tbMixB = _tab_0
         end
+        _obj_2 = _tab_1
+        local _idx_2 = #_tab_0 + 1
+        for _index_0 = 1, #_obj_2 do
+                local _value_0 = _obj_2[_index_0]
+                _tab_0[_idx_2] = _value_0
+                _idx_2 = _idx_2 + 1
+        end
+        _tab_0[#_tab_0 + 1] = 1
+        _tab_0[#_tab_0 + 1] = 2
+        _tab_0[#_tab_0 + 1] = 3
+        tbMixB = _tab_0
 end
 local template <const> = {
         foo = "Hello",
diff --git a/spec/outputs/test/format_spec.lua b/spec/outputs/test/format_spec.lua
index 33a85f2..ed0fbee 100644
--- a/spec/outputs/test/format_spec.lua
+++ b/spec/outputs/test/format_spec.lua
@@ -101,16 +101,14 @@ rewriteLineCol = function(item)
         item[2] = 0
         item[3] = 0
         for i = 4, #item do
-                do
-                        local _exp_0 = type(item[i])
-                        if "table" == _exp_0 then
-                                if item[i][1] == "comment" then
-                                        table.remove(item, i)
-                                        rewriteLineCol(item)
-                                        return
-                                end
-                                rewriteLineCol(item[i])
+                local _exp_0 = type(item[i])
+                if "table" == _exp_0 then
+                        if item[i][1] == "comment" then
+                                table.remove(item, i)
+                                rewriteLineCol(item)
+                                return
                         end
+                        rewriteLineCol(item[i])
                 end
         end
 end
diff --git a/spec/outputs/unicode/ambiguous.lua b/spec/outputs/unicode/ambiguous.lua
index 3783026..ac90016 100644
--- a/spec/outputs/unicode/ambiguous.lua
+++ b/spec/outputs/unicode/ambiguous.lua
@@ -13,11 +13,17 @@ _u53d8_u91cfa, _u53d8_u91cfb = _u53d8_u91cfc, _u53d8_u91cfd;
 (_u53d8_u91cfd(_u53d8_u91cfa))(_u53d8_u91cfc)
 for _u8ba1_u6570 = 1, 10 do
         _u53d8_u91cfa = function() end
-        (_u6253_u5370)(1)
-        _u53d8_u91cfa = _u53d8_u91cff;
-        (_u6253_u5370)(2)
+        do
+                (_u6253_u5370)(1)
+        end
+        _u53d8_u91cfa = _u53d8_u91cff
+        do
+                (_u6253_u5370)(2)
+        end
         if _u6761_u4ef6 then
-                (_u6253_u5370)(3)
+                do
+                        (_u6253_u5370)(3)
+                end
         end
         ::_u8df3_u8f6c_u4f4d_u7f6e::;
         (_u6253_u5370)(4)
@@ -40,7 +46,9 @@ do
         end)
 end
 do
-        _u6253_u5370(123)
+        do
+                _u6253_u5370(123)
+        end
 end
 do
         _u51fd_u6570f({
@@ -97,18 +105,16 @@ do
                 _u6570_u5b57_u6570_u7ec4 = _accum_0
         end
         local _u5bf9_u8c61_u6570_u7ec4
-        do
-                local _accum_0 = { }
-                local _len_0 = 1
-                local _list_0 = _u7269_u4ef6_u6570_u7ec4
-                for _index_0 = 1, #_list_0 do
-                        local _u7269_u4ef6 = _list_0[_index_0]
-                        _accum_0[_len_0] = {
-                                ["�称"] = _u7269_u4ef6
-                        }
-                        _len_0 = _len_0 + 1
-                end
-                _u5bf9_u8c61_u6570_u7ec4 = _accum_0
+        local _accum_0 = { }
+        local _len_0 = 1
+        local _list_0 = _u7269_u4ef6_u6570_u7ec4
+        for _index_0 = 1, #_list_0 do
+                local _u7269_u4ef6 = _list_0[_index_0]
+                _accum_0[_len_0] = {
+                        ["�称"] = _u7269_u4ef6
+                }
+                _len_0 = _len_0 + 1
         end
+        _u5bf9_u8c61_u6570_u7ec4 = _accum_0
 end
 return nil
diff --git a/spec/outputs/unicode/assign.lua b/spec/outputs/unicode/assign.lua
index 290b248..16ece1a 100644
--- a/spec/outputs/unicode/assign.lua
+++ b/spec/outputs/unicode/assign.lua
@@ -52,18 +52,16 @@ return __u65e0_u6548_u53d8_u91cf(function()
         setmetatable(a_u53d8_u91cf, _anon_func_0(_u6253_u5370))
         do
                 local _u5143_u7d20a, _u5143_u7d20b
-                do
-                        local _exp_0 = _u5bf9_u8c61c
-                        if "a" == _exp_0 then
-                                do
-                                        local _obj_0 = _u5b57_u5178
-                                        _u5143_u7d20a, _u5143_u7d20b = _obj_0[1], _obj_0[2]
-                                end
-                        elseif "b" == _exp_0 then
-                                do
-                                        local _obj_0 = _u51fd_u6570()
-                                        _u5143_u7d20a, _u5143_u7d20b = _obj_0[1], _obj_0[2]
-                                end
+                local _exp_0 = _u5bf9_u8c61c
+                if "a" == _exp_0 then
+                        do
+                                local _obj_0 = _u5b57_u5178
+                                _u5143_u7d20a, _u5143_u7d20b = _obj_0[1], _obj_0[2]
+                        end
+                elseif "b" == _exp_0 then
+                        do
+                                local _obj_0 = _u51fd_u6570()
+                                _u5143_u7d20a, _u5143_u7d20b = _obj_0[1], _obj_0[2]
                         end
                 end
         end
@@ -78,15 +76,11 @@ return __u65e0_u6548_u53d8_u91cf(function()
         do
                 local _u53d8_u91cfa
                 if x_u6761_u4ef6 then
-                        do
-                                local _exp_0 = _u5bf9_u8c61y
-                                if 1 == _exp_0 then
-                                        do
-                                                local _obj_0, _obj_1 = _u51fd_u6570()
-                                                _u53d8_u91cfb[#_u53d8_u91cfb + 1] = _obj_1
-                                                _u53d8_u91cfa = _obj_0
-                                        end
-                                end
+                        local _exp_0 = _u5bf9_u8c61y
+                        if 1 == _exp_0 then
+                                local _obj_0, _obj_1 = _u51fd_u6570()
+                                _u53d8_u91cfb[#_u53d8_u91cfb + 1] = _obj_1
+                                _u53d8_u91cfa = _obj_0
                         end
                 end
         end
@@ -94,11 +88,9 @@ return __u65e0_u6548_u53d8_u91cf(function()
                 local _u53d8_u91cfa
                 local _u5143_u7d20b
                 if x_u6761_u4ef6 then
-                        do
-                                local _obj_0, _obj_1 = _u51fd_u6570()
-                                _u53d8_u91cfa = _obj_0
-                                _u5143_u7d20b = _obj_1[1]
-                        end
+                        local _obj_0, _obj_1 = _u51fd_u6570()
+                        _u53d8_u91cfa = _obj_0
+                        _u5143_u7d20b = _obj_1[1]
                 else
                         _u53d8_u91cfa = 123
                         _u5143_u7d20b = _u8868[1]
@@ -107,42 +99,28 @@ return __u65e0_u6548_u53d8_u91cf(function()
         do
                 local _u53d8_u91cfa, _u5bf9_u8c61c
                 if _u6761_u4ef6x then
-                        do
-                                local _exp_0 = _u5bf9_u8c61y
-                                if 1 == _exp_0 then
-                                        do
-                                                local _obj_0, _obj_1, _obj_2, _obj_3 = _u51fd_u6570()
-                                                do
-                                                        local _obj_4 = _u6570_u7ec4b
-                                                        _obj_4[#_obj_4 + 1] = _obj_1
-                                                end
-                                                _u53d8_u91cfa, _u5bf9_u8c61c, getmetatable(_u5bf9_u8c61d).__add = _obj_0, _obj_2, _obj_3
-                                        end
-                                end
+                        local _exp_0 = _u5bf9_u8c61y
+                        if 1 == _exp_0 then
+                                local _obj_0, _obj_1, _obj_2, _obj_3 = _u51fd_u6570()
+                                local _obj_4 = _u6570_u7ec4b
+                                _obj_4[#_obj_4 + 1] = _obj_1
+                                _u53d8_u91cfa, _u5bf9_u8c61c, getmetatable(_u5bf9_u8c61d).__add = _obj_0, _obj_2, _obj_3
                         end
                 elseif _u6761_u4ef6x2 then
                         if _u6761_u4ef6y2 then
-                                do
-                                        local _obj_0, _obj_1, _obj_2, _obj_3 = _u51fd_u65701()
-                                        do
-                                                local _obj_4 = _u6570_u7ec4b
-                                                _obj_4[#_obj_4 + 1] = _obj_1
-                                        end
-                                        _u53d8_u91cfa, _u5bf9_u8c61c, getmetatable(_u5bf9_u8c61d).__add = _obj_0, _obj_2, _obj_3
-                                end
+                                local _obj_0, _obj_1, _obj_2, _obj_3 = _u51fd_u65701()
+                                local _obj_4 = _u6570_u7ec4b
+                                _obj_4[#_obj_4 + 1] = _obj_1
+                                _u53d8_u91cfa, _u5bf9_u8c61c, getmetatable(_u5bf9_u8c61d).__add = _obj_0, _obj_2, _obj_3
                         end
                 else
                         _u6253_u5370("hello")
                         do
                                 _u6253_u5370(123)
-                                do
-                                        local _obj_0, _obj_1, _obj_2 = _u51fd_u65702()
-                                        do
-                                                local _obj_3 = _u6570_u7ec4b
-                                                _obj_3[#_obj_3 + 1] = _obj_0
-                                        end
-                                        _u53d8_u91cfa, _u5bf9_u8c61c, getmetatable(_u5bf9_u8c61d).__add = 1, _obj_1, _obj_2
-                                end
+                                local _obj_0, _obj_1, _obj_2 = _u51fd_u65702()
+                                local _obj_3 = _u6570_u7ec4b
+                                _obj_3[#_obj_3 + 1] = _obj_0
+                                _u53d8_u91cfa, _u5bf9_u8c61c, getmetatable(_u5bf9_u8c61d).__add = 1, _obj_1, _obj_2
                         end
                 end
         end
diff --git a/spec/outputs/unicode/attrib.lua b/spec/outputs/unicode/attrib.lua
index 0f60451..58ad4b2 100644
--- a/spec/outputs/unicode/attrib.lua
+++ b/spec/outputs/unicode/attrib.lua
@@ -14,20 +14,16 @@ end
 do
         local _u5e38_u91cfa <const> = _u51fd_u6570()
         local _u5143_u7d20b, _u5143_u7d20c, _u5143_u7d20d
-        do
-                local _obj_0, _obj_1 = _u51fd_u65701()
-                _u5143_u7d20b, _u5143_u7d20c = _obj_0[1], _obj_0[2]
-                _u5143_u7d20d = _obj_1[1]
-        end
+        local _obj_0, _obj_1 = _u51fd_u65701()
+        _u5143_u7d20b, _u5143_u7d20c = _obj_0[1], _obj_0[2]
+        _u5143_u7d20d = _obj_1[1]
 end
 do
         local _u5e38_u91cfa, _u5143_u7d20b, _u5143_u7d20c, _u5143_u7d20d
-        do
-                local _obj_0, _obj_1, _obj_2 = _u51fd_u6570()
-                _u5e38_u91cfa = _obj_0
-                _u5143_u7d20b, _u5143_u7d20c = _obj_1[1], _obj_1[2]
-                _u5143_u7d20d = _obj_2[1]
-        end
+        local _obj_0, _obj_1, _obj_2 = _u51fd_u6570()
+        _u5e38_u91cfa = _obj_0
+        _u5143_u7d20b, _u5143_u7d20c = _obj_1[1], _obj_1[2]
+        _u5143_u7d20d = _obj_2[1]
 end
 do
         local _u5173_u95ed_u53d8_u91cfv <close> = (function()
diff --git a/spec/outputs/unicode/backcall.lua b/spec/outputs/unicode/backcall.lua
index 91dfdff..f4bd5a3 100644
--- a/spec/outputs/unicode/backcall.lua
+++ b/spec/outputs/unicode/backcall.lua
@@ -31,21 +31,19 @@ do
         end)())
 end
 do
-        do
-                local _obj_0 = _u7f51_u7edc
-                if _obj_0 ~= nil then
-                        _obj_0["获�"]("测试地�", function(_u6570_u636e)
-                                local _call_0 = _u7f51_u9875_u4f53[".结果"]
-                                _call_0["网页"](_call_0, _u6570_u636e)
-                                return _u7f51_u7edc["请求"]("测试地�", _u6570_u636e, function(_u662f_u5426_u5904_u7406_u6210_u529f)
-                                        local _call_1 = _u7f51_u9875_u4f53[".结果"]
-                                        _call_1["添加"](_call_1, _u662f_u5426_u5904_u7406_u6210_u679c)
-                                        return _u8bbe_u7f6e_u8d85_u65f6_u56de_u8c03(1000, function()
-                                                return _u6253_u5370("完�")
-                                        end)
+        local _obj_0 = _u7f51_u7edc
+        if _obj_0 ~= nil then
+                _obj_0["获�"]("测试地�", function(_u6570_u636e)
+                        local _call_0 = _u7f51_u9875_u4f53[".结果"]
+                        _call_0["网页"](_call_0, _u6570_u636e)
+                        return _u7f51_u7edc["请求"]("测试地�", _u6570_u636e, function(_u662f_u5426_u5904_u7406_u6210_u529f)
+                                local _call_1 = _u7f51_u9875_u4f53[".结果"]
+                                _call_1["添加"](_call_1, _u662f_u5426_u5904_u7406_u6210_u679c)
+                                return _u8bbe_u7f6e_u8d85_u65f6_u56de_u8c03(1000, function()
+                                        return _u6253_u5370("完�")
                                 end)
                         end)
-                end
+                end)
         end
 end
 do
diff --git a/spec/outputs/unicode/bubbling.lua b/spec/outputs/unicode/bubbling.lua
index cb8750d..55666ba 100644
--- a/spec/outputs/unicode/bubbling.lua
+++ b/spec/outputs/unicode/bubbling.lua
@@ -109,15 +109,13 @@ __u65e0_u6548_u53d8_u91cf = function(...)
                 _u6570_u7ec4a = _accum_0
         end
         local _u6570_u7ec4b
-        do
-                local _accum_0 = { }
-                local _len_0 = 1
-                for _u8ba1_u6570 = 1, 10 do
-                        _accum_0[_len_0] = function(...)
-                                return _u6253_u5370(...)
-                        end
-                        _len_0 = _len_0 + 1
+        local _accum_0 = { }
+        local _len_0 = 1
+        for _u8ba1_u6570 = 1, 10 do
+                _accum_0[_len_0] = function(...)
+                        return _u6253_u5370(...)
                 end
-                _u6570_u7ec4b = _accum_0
+                _len_0 = _len_0 + 1
         end
+        _u6570_u7ec4b = _accum_0
 end
diff --git a/spec/outputs/unicode/class.lua b/spec/outputs/unicode/class.lua
index 4d309e3..23fc8f4 100644
--- a/spec/outputs/unicode/class.lua
+++ b/spec/outputs/unicode/class.lua
@@ -497,30 +497,28 @@ _u6253_u5370("你好")
 local _u53d8_u91cfyyy
 _u53d8_u91cfyyy = function()
         local _u9177
-        do
-                local _class_0
-                local _base_0 = { }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
-                end
-                _class_0 = setmetatable({
-                        __init = function() end,
-                        __base = _base_0,
-                        __name = "é…·"
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                local self = _class_0;
-                _ = nil
-                _u9177 = _class_0
-                return _class_0
+        local _class_0
+        local _base_0 = { }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
         end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "é…·"
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        local self = _class_0;
+        _ = nil
+        _u9177 = _class_0
+        return _class_0
 end
 do
         local _class_0
diff --git a/spec/outputs/unicode/cond.lua b/spec/outputs/unicode/cond.lua
index ed5d274..2b5af8a 100644
--- a/spec/outputs/unicode/cond.lua
+++ b/spec/outputs/unicode/cond.lua
@@ -113,19 +113,15 @@ local z_u53d8_u91cf = false
 if false then
         __u65e0_u6548_u53d8_u91cf = _u4e00
 else
-        do
-                local _u6761_u4ef6x = true
-                if _u6761_u4ef6x then
-                        __u65e0_u6548_u53d8_u91cf = _u4e8c
+        local _u6761_u4ef6x = true
+        if _u6761_u4ef6x then
+                __u65e0_u6548_u53d8_u91cf = _u4e8c
+        else
+                local _u6761_u4ef6z = true
+                if _u6761_u4ef6z then
+                        __u65e0_u6548_u53d8_u91cf = _u4e09
                 else
-                        do
-                                local _u6761_u4ef6z = true
-                                if _u6761_u4ef6z then
-                                        __u65e0_u6548_u53d8_u91cf = _u4e09
-                                else
-                                        __u65e0_u6548_u53d8_u91cf = _u56db
-                                end
-                        end
+                        __u65e0_u6548_u53d8_u91cf = _u56db
                 end
         end
 end
@@ -133,35 +129,27 @@ local _u8f93_u51fa
 if false then
         _u8f93_u51fa = _u4e00
 else
-        do
-                local _u6761_u4ef6x = true
-                if _u6761_u4ef6x then
-                        _u8f93_u51fa = _u4e8c
+        local _u6761_u4ef6x = true
+        if _u6761_u4ef6x then
+                _u8f93_u51fa = _u4e8c
+        else
+                local _u6761_u4ef6z = true
+                if _u6761_u4ef6z then
+                        _u8f93_u51fa = _u4e09
                 else
-                        do
-                                local _u6761_u4ef6z = true
-                                if _u6761_u4ef6z then
-                                        _u8f93_u51fa = _u4e09
-                                else
-                                        _u8f93_u51fa = _u56db
-                                end
-                        end
+                        _u8f93_u51fa = _u56db
                 end
         end
 end
 local _u53d8_u91cf
 _u53d8_u91cf = function()
-        do
-                local _u67d0_u4e1c_u897f = true
-                if _u67d0_u4e1c_u897f then
-                        return 1
-                else
-                        do
-                                local _u53e6_u4e00_u4e2a = false
-                                if _u53e6_u4e00_u4e2a then
-                                        return 2
-                                end
-                        end
+        local _u67d0_u4e1c_u897f = true
+        if _u67d0_u4e1c_u897f then
+                return 1
+        else
+                local _u53e6_u4e00_u4e2a = false
+                if _u53e6_u4e00_u4e2a then
+                        return 2
                 end
         end
 end
@@ -319,12 +307,10 @@ do
         end
 end
 do
-        do
-                local __u6a21_u5757 = { }
-                if __u6a21_u5757 then
-                        local _u4e1c_u897f = __u6a21_u5757["东西"]
-                        local a_u529f_u80fd, b_u529f_u80fd = __u6a21_u5757["a功能"], __u6a21_u5757["b功能"]
-                end
+        local __u6a21_u5757 = { }
+        if __u6a21_u5757 then
+                local _u4e1c_u897f = __u6a21_u5757["东西"]
+                local a_u529f_u80fd, b_u529f_u80fd = __u6a21_u5757["a功能"], __u6a21_u5757["b功能"]
         end
 end
 do
diff --git a/spec/outputs/unicode/destructure.lua b/spec/outputs/unicode/destructure.lua
index 002c4b0..7263d49 100644
--- a/spec/outputs/unicode/destructure.lua
+++ b/spec/outputs/unicode/destructure.lua
@@ -127,11 +127,9 @@ do
         end
 end
 do
-        do
-                local _with_0 = _u4e1c_u897f
-                local _u5143_u7d20a, _u5143_u7d20b = _with_0[1], _with_0[2]
-                _u6253_u5370(_u5143_u7d20a, _u5143_u7d20b)
-        end
+        local _with_0 = _u4e1c_u897f
+        local _u5143_u7d20a, _u5143_u7d20b = _with_0[1], _with_0[2]
+        _u6253_u5370(_u5143_u7d20a, _u5143_u7d20b)
 end
 do
         local _u4e1c_u897f = nil
@@ -320,11 +318,9 @@ do
                         _tmp_0 = _obj_0["函数"]
                 end
                 if _tmp_0 == nil then
-                        do
-                                local _obj_0 = _u9879_u76ee
-                                if _obj_0 ~= nil then
-                                        _tmp_0 = _obj_0["默认值"]
-                                end
+                        local _obj_0 = _u9879_u76ee
+                        if _obj_0 ~= nil then
+                                _tmp_0 = _obj_0["默认值"]
                         end
                 end
                 a_u5bf9_u8c61["b字段"](function()
@@ -436,11 +432,9 @@ do
         end
         local _u53d8_u91cfy1, _u53d8_u91cfy4
         local _u5b57_u6bb5y2, _u5b57_u6bb5y3
-        do
-                local _obj_0, _obj_1 = _u51fd_u65702()
-                _u53d8_u91cfy1, _u53d8_u91cfy4 = _u51fd_u65701(), _obj_1
-                _u5b57_u6bb5y2, _u5b57_u6bb5y3 = _obj_0["字段y2"], _obj_0["字段y3"]
-        end
+        local _obj_0, _obj_1 = _u51fd_u65702()
+        _u53d8_u91cfy1, _u53d8_u91cfy4 = _u51fd_u65701(), _obj_1
+        _u5b57_u6bb5y2, _u5b57_u6bb5y3 = _obj_0["字段y2"], _obj_0["字段y3"]
 end
 do
         local _u53d8_u91cfv1, _u53d8_u91cfv2, _u53d8_u91cfv3, _u53d8_u91cfv4
@@ -470,11 +464,9 @@ do
 end
 do
         local _u503c, _u5143_u503c
-        do
-                local _obj_0 = _u5bf9_u8c61tb
-                _u503c = _obj_0[_u540d_u79f0]
-                _u5143_u503c = getmetatable(_obj_0)[_u540d_u79f0]
-        end
+        local _obj_0 = _u5bf9_u8c61tb
+        _u503c = _obj_0[_u540d_u79f0]
+        _u5143_u503c = getmetatable(_obj_0)[_u540d_u79f0]
 end
 do
         local tostring, add
@@ -487,24 +479,22 @@ do
                         end)
                 end
         end
-        do
-                local _exp_0 = _u5bf9_u8c61tb
-                local _type_0 = type(_exp_0)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                if _tab_0 then
-                        local name, _u5143_u5b57_u6bb5
-                        do
-                                local _obj_0 = getmetatable(_exp_0)
-                                name = _obj_0.__name
-                                _u5143_u5b57_u6bb5 = _obj_0["123"]
-                                if name == nil then
-                                        name = "项目"
-                                end
-                        end
-                        if _u5143_u5b57_u6bb5 ~= nil then
-                                _u6253_u5370(name, _u5143_u5b57_u6bb5)
+        local _exp_0 = _u5bf9_u8c61tb
+        local _type_0 = type(_exp_0)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        if _tab_0 then
+                local name, _u5143_u5b57_u6bb5
+                do
+                        local _obj_0 = getmetatable(_exp_0)
+                        name = _obj_0.__name
+                        _u5143_u5b57_u6bb5 = _obj_0["123"]
+                        if name == nil then
+                                name = "项目"
                         end
                 end
+                if _u5143_u5b57_u6bb5 ~= nil then
+                        _u6253_u5370(name, _u5143_u5b57_u6bb5)
+                end
         end
 end
 do
@@ -586,52 +576,50 @@ do
                         _u6253_u5370(add, _u5b57_u6bb5)
                 end
         end
-        do
-                local _exp_0 = tb
-                local _type_0 = type(_exp_0)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                if _tab_0 then
-                        do
-                                local _obj_0 = _exp_0["字段c"]
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        do
-                                                local _obj_1 = getmetatable(_obj_0)
-                                                local _type_2 = type(_obj_1)
-                                                if "table" == _type_2 or "userdata" == _type_2 then
-                                                        _u5143_u5b57_u6bb5 = _obj_1["字段abc"]
-                                                end
+        local _exp_0 = tb
+        local _type_0 = type(_exp_0)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        if _tab_0 then
+                do
+                        local _obj_0 = _exp_0["字段c"]
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                do
+                                        local _obj_1 = getmetatable(_obj_0)
+                                        local _type_2 = type(_obj_1)
+                                        if "table" == _type_2 or "userdata" == _type_2 then
+                                                _u5143_u5b57_u6bb5 = _obj_1["字段abc"]
                                         end
                                 end
                         end
-                        if _u5143_u5b57_u6bb5 == nil then
-                                _u5143_u5b57_u6bb5 = "默认值"
-                        end
+                end
+                if _u5143_u5b57_u6bb5 == nil then
+                        _u5143_u5b57_u6bb5 = "默认值"
+                end
+                do
+                        local _obj_0 = getmetatable(_exp_0)
                         do
-                                local _obj_0 = getmetatable(_exp_0)
-                                do
-                                        local _obj_1 = _obj_0[ [[any string]]]
-                                        local _type_1 = type(_obj_1)
-                                        if "table" == _type_1 or "userdata" == _type_1 then
-                                                _u53d8_u91cfabc = _obj_1["字段d"]
-                                        end
-                                end
-                                do
-                                        local _obj_1 = _obj_0['字符串']
-                                        local _type_1 = type(_obj_1)
-                                        if "table" == _type_1 or "userdata" == _type_1 then
-                                                _u6709_u9ed8_u8ba4_u503c = _obj_1["字段e"]
-                                        end
-                                end
-                                if _u53d8_u91cfabc == nil then
-                                        _u53d8_u91cfabc = 123
+                                local _obj_1 = _obj_0[ [[any string]]]
+                                local _type_1 = type(_obj_1)
+                                if "table" == _type_1 or "userdata" == _type_1 then
+                                        _u53d8_u91cfabc = _obj_1["字段d"]
                                 end
-                                if _u6709_u9ed8_u8ba4_u503c == nil then
-                                        _u6709_u9ed8_u8ba4_u503c = { }
+                        end
+                        do
+                                local _obj_1 = _obj_0['字符串']
+                                local _type_1 = type(_obj_1)
+                                if "table" == _type_1 or "userdata" == _type_1 then
+                                        _u6709_u9ed8_u8ba4_u503c = _obj_1["字段e"]
                                 end
                         end
-                        _u6253_u5370(_u5143_u5b57_u6bb5, _u53d8_u91cfabc, _u6709_u9ed8_u8ba4_u503c)
+                        if _u53d8_u91cfabc == nil then
+                                _u53d8_u91cfabc = 123
+                        end
+                        if _u6709_u9ed8_u8ba4_u503c == nil then
+                                _u6709_u9ed8_u8ba4_u503c = { }
+                        end
                 end
+                _u6253_u5370(_u5143_u5b57_u6bb5, _u53d8_u91cfabc, _u6709_u9ed8_u8ba4_u503c)
         end
 end
 return nil
diff --git a/spec/outputs/unicode/global.lua b/spec/outputs/unicode/global.lua
index c91db52..a34ce6d 100644
--- a/spec/outputs/unicode/global.lua
+++ b/spec/outputs/unicode/global.lua
@@ -3,29 +3,27 @@ do
         _u9177 = "📉"
 end
 do
-        do
-                local _class_0
-                local _base_0 = {
-                        ["嗯"] = "🆒"
-                }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
-                end
-                _class_0 = setmetatable({
-                        __init = function() end,
-                        __base = _base_0,
-                        __name = "全局类"
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                _u5168_u5c40_u7c7b = _class_0
+        local _class_0
+        local _base_0 = {
+                ["嗯"] = "🆒"
+        }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
         end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "全局类"
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        _u5168_u5c40_u7c7b = _class_0
 end
 do
         local _u53d8_u91cfc, _u53d8_u91cfd
diff --git a/spec/outputs/unicode/import.lua b/spec/outputs/unicode/import.lua
index 3499295..e4aec89 100644
--- a/spec/outputs/unicode/import.lua
+++ b/spec/outputs/unicode/import.lua
@@ -30,16 +30,14 @@ do
 end
 if _u7f29_u8fdb then
         local _u597d_u5427, _u5f88_u597d
-        do
-                local _obj_1 = _u5f88_u591a_u8868[100]
-                _u597d_u5427, _u5f88_u597d = _obj_1["好�"], (function()
-                        local _base_0 = _obj_1
-                        local _fn_0 = _base_0["很好"]
-                        return _fn_0 and function(...)
-                                return _fn_0(_base_0, ...)
-                        end
-                end)()
-        end
+        local _obj_1 = _u5f88_u591a_u8868[100]
+        _u597d_u5427, _u5f88_u597d = _obj_1["好�"], (function()
+                local _base_0 = _obj_1
+                local _fn_0 = _base_0["很好"]
+                return _fn_0 and function(...)
+                        return _fn_0(_base_0, ...)
+                end
+        end)()
 end
 do
         local _u5b57_u6bb5a, _u5b57_u6bb5b, _u5b57_u6bb5c = _u5bf9_u8c61z["字段a"], _u5bf9_u8c61z["字段b"], _u5bf9_u8c61z["字段c"]
diff --git a/spec/outputs/unicode/in_expression.lua b/spec/outputs/unicode/in_expression.lua
index 2f47b1f..4b8f711 100644
--- a/spec/outputs/unicode/in_expression.lua
+++ b/spec/outputs/unicode/in_expression.lua
@@ -173,10 +173,8 @@ do
         _u51fd_u65704 = function()
                 local _u53d8_u91cfa = 2
                 local _u53d8_u91cfb
-                do
-                        local _val_0 = a
-                        _u53d8_u91cfb = 1 == _val_0 or 2 == _val_0 or 3 == _val_0 or 4 == _val_0
-                end
+                local _val_0 = a
+                _u53d8_u91cfb = 1 == _val_0 or 2 == _val_0 or 3 == _val_0 or 4 == _val_0
         end
         local _u51fd_u65705
         _u51fd_u65705 = function()
diff --git a/spec/outputs/unicode/local.lua b/spec/outputs/unicode/local.lua
index 170144b..4b4b366 100644
--- a/spec/outputs/unicode/local.lua
+++ b/spec/outputs/unicode/local.lua
@@ -98,50 +98,46 @@ do
                 F_u4e94 = 6
                 O_u4e00 = _class_0
         end
-        do
-                local _class_0
-                local N_u65e0
-                local _base_0 = { }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
-                end
-                _class_0 = setmetatable({
-                        __init = function() end,
-                        __base = _base_0,
-                        __name = "T二"
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                local self = _class_0;
-                do
-                        local _class_1
-                        local _base_1 = { }
-                        if _base_1.__index == nil then
-                                _base_1.__index = _base_1
-                        end
-                        _class_1 = setmetatable({
-                                __init = function() end,
-                                __base = _base_1,
-                                __name = "Næ— "
-                        }, {
-                                __index = _base_1,
-                                __call = function(cls, ...)
-                                        local _self_0 = setmetatable({ }, _base_1)
-                                        cls.__init(_self_0, ...)
-                                        return _self_0
-                                end
-                        })
-                        _base_1.__class = _class_1
-                        N_u65e0 = _class_1
+        local _class_0
+        local N_u65e0
+        local _base_0 = { }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "T二"
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
                 end
-                T_u4e8c = _class_0
+        })
+        _base_0.__class = _class_0
+        local self = _class_0;
+        local _class_1
+        local _base_1 = { }
+        if _base_1.__index == nil then
+                _base_1.__index = _base_1
         end
+        _class_1 = setmetatable({
+                __init = function() end,
+                __base = _base_1,
+                __name = "Næ— "
+        }, {
+                __index = _base_1,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_1)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_1.__class = _class_1
+        N_u65e0 = _class_1
+        T_u4e8c = _class_0
 end
 do
         local _list_0 = { }
diff --git a/spec/outputs/unicode/loops.lua b/spec/outputs/unicode/loops.lua
index d630343..8379993 100644
--- a/spec/outputs/unicode/loops.lua
+++ b/spec/outputs/unicode/loops.lua
@@ -297,17 +297,15 @@ end
 do
         for _u53d8_u91cfi = 1, 10 do
                 repeat
-                        do
-                                local _with_0 = _u5bf9_u8c61tb
-                                if _with_0 ~= nil then
-                                        _with_0["字段a"] = 1
-                                        if _with_0["字段b"] then
-                                                goto _continue_12
-                                        end
-                                        do
-                                                if _with_0["字段c"] then
-                                                        break
-                                                end
+                        local _with_0 = _u5bf9_u8c61tb
+                        if _with_0 ~= nil then
+                                _with_0["字段a"] = 1
+                                if _with_0["字段b"] then
+                                        goto _continue_12
+                                end
+                                do
+                                        if _with_0["字段c"] then
+                                                break
                                         end
                                 end
                         end
diff --git a/spec/outputs/unicode/macro.lua b/spec/outputs/unicode/macro.lua
index 88f6de7..069f429 100644
--- a/spec/outputs/unicode/macro.lua
+++ b/spec/outputs/unicode/macro.lua
@@ -1,4 +1,6 @@
-assert(_u5bf9_u8c61 == nil)
+do
+        assert(_u5bf9_u8c61 == nil)
+end
 local _u7ed3_u679c = (_u5bf9_u8c61 == nil)
 if _u51fd_u65701() then
         _u6253_u5370("没问题")
@@ -9,89 +11,89 @@ end
 local _u5bf9_u8c61
 do
         local __u6e90_, __u76ee_u6807_
-        do
-                __u76ee_u6807_ = {
-                        ["�置"] = { },
-                        ["标签"] = (function()
-                                local _call_0 = _u6807_u7b7e
-                                return _call_0["转数字"](_call_0)
-                        end)()
-                }
-                do
-                        __u6e90_ = self
-                        __u76ee_u6807_["标识"] = __u6e90_["标识"]
-                        __u76ee_u6807_["连接们"] = __u6e90_["连接们"]
-                        __u76ee_u6807_["�置"]["x�标"] = __u6e90_["�置"]["x�标"]
-                        __u76ee_u6807_["�置"]["y�标"] = __u6e90_["�置"]["y�标"]
-                        __u76ee_u6807_["�置"]["z�标"] = __u6e90_["�置"]["z�标"]
-                end
-                _u5bf9_u8c61 = __u76ee_u6807_
-        end
+        __u76ee_u6807_ = {
+                ["�置"] = { },
+                ["标签"] = (function()
+                        local _call_0 = _u6807_u7b7e
+                        return _call_0["转数字"](_call_0)
+                end)()
+        }
+        __u6e90_ = self
+        __u76ee_u6807_["标识"] = __u6e90_["标识"]
+        __u76ee_u6807_["连接们"] = __u6e90_["连接们"]
+        __u76ee_u6807_["�置"]["x�标"] = __u6e90_["�置"]["x�标"]
+        __u76ee_u6807_["�置"]["y�标"] = __u6e90_["�置"]["y�标"]
+        __u76ee_u6807_["�置"]["z�标"] = __u6e90_["�置"]["z�标"]
+        _u5bf9_u8c61 = __u76ee_u6807_
 end
 if (_u53d8_u91cfx == "�" or _u53d8_u91cfx == "�" or _u53d8_u91cfx == "�") then
         _u6253_u5370("存在")
 end
-local _list_0 = (function()
-        local _accum_0 = { }
-        local _len_0 = 1
+do
         local _list_0 = (function()
-                local _accum_1 = { }
-                local _len_1 = 1
-                local _list_0 = {
-                        1,
-                        2,
-                        3
-                }
+                local _accum_0 = { }
+                local _len_0 = 1
+                local _list_0 = (function()
+                        local _accum_1 = { }
+                        local _len_1 = 1
+                        local _list_0 = {
+                                1,
+                                2,
+                                3
+                        }
+                        for _index_0 = 1, #_list_0 do
+                                local _ = _list_0[_index_0]
+                                _accum_1[_len_1] = _ * 2
+                                _len_1 = _len_1 + 1
+                        end
+                        return _accum_1
+                end)()
                 for _index_0 = 1, #_list_0 do
                         local _ = _list_0[_index_0]
-                        _accum_1[_len_1] = _ * 2
-                        _len_1 = _len_1 + 1
+                        if _ > 4 then
+                                _accum_0[_len_0] = _
+                                _len_0 = _len_0 + 1
+                        end
                 end
-                return _accum_1
+                return _accum_0
         end)()
         for _index_0 = 1, #_list_0 do
                 local _ = _list_0[_index_0]
-                if _ > 4 then
-                        _accum_0[_len_0] = _
-                        _len_0 = _len_0 + 1
-                end
+                _u6253_u5370(_)
         end
-        return _accum_0
-end)()
-for _index_0 = 1, #_list_0 do
-        local _ = _list_0[_index_0]
-        _u6253_u5370(_)
 end
-local _list_1 = (function()
-        local _accum_0 = { }
-        local _len_0 = 1
-        local _list_1 = (function()
-                local _accum_1 = { }
-                local _len_1 = 1
-                local _list_1 = {
-                        1,
-                        2,
-                        3
-                }
-                for _index_0 = 1, #_list_1 do
-                        local _ = _list_1[_index_0]
-                        _accum_1[_len_1] = _ * 2
-                        _len_1 = _len_1 + 1
+do
+        local _list_0 = (function()
+                local _accum_0 = { }
+                local _len_0 = 1
+                local _list_0 = (function()
+                        local _accum_1 = { }
+                        local _len_1 = 1
+                        local _list_0 = {
+                                1,
+                                2,
+                                3
+                        }
+                        for _index_0 = 1, #_list_0 do
+                                local _ = _list_0[_index_0]
+                                _accum_1[_len_1] = _ * 2
+                                _len_1 = _len_1 + 1
+                        end
+                        return _accum_1
+                end)()
+                for _index_0 = 1, #_list_0 do
+                        local _ = _list_0[_index_0]
+                        if _ > 4 then
+                                _accum_0[_len_0] = _
+                                _len_0 = _len_0 + 1
+                        end
                 end
-                return _accum_1
+                return _accum_0
         end)()
-        for _index_0 = 1, #_list_1 do
-                local _ = _list_1[_index_0]
-                if _ > 4 then
-                        _accum_0[_len_0] = _
-                        _len_0 = _len_0 + 1
-                end
+        for _index_0 = 1, #_list_0 do
+                local _ = _list_0[_index_0]
+                _u6253_u5370(_)
         end
-        return _accum_0
-end)()
-for _index_0 = 1, #_list_1 do
-        local _ = _list_1[_index_0]
-        _u6253_u5370(_)
 end
 local _u503c
 do
@@ -99,13 +101,13 @@ do
         do
                 local _accum_0 = { }
                 local _len_0 = 1
-                local _list_2 = {
+                local _list_0 = {
                         1,
                         2,
                         3
                 }
-                for _index_0 = 1, #_list_2 do
-                        local _ = _list_2[_index_0]
+                for _index_0 = 1, #_list_0 do
+                        local _ = _list_0[_index_0]
                         _accum_0[_len_0] = _ * 2
                         _len_0 = _len_0 + 1
                 end
@@ -137,8 +139,10 @@ do
         end
         _u503c = _4
 end
-local _call_0 = (1 + 2)
-_call_0["调用"](_call_0, 123)
+do
+        local _call_0 = (1 + 2)
+        _call_0["调用"](_call_0, 123)
+end
 _u7ed3_u679c = (1 + 2)
 local f
 f = function(_u53c2_u6570x)
@@ -203,7 +207,7 @@ local function dummy()
 end
 -- 这有个注释
 local _ = require('下划线')
-local _call_1 = (_({
+local _call_0 = (_({
         1,
         2,
         3,
@@ -211,61 +215,65 @@ local _call_1 = (_({
         -2,
         3
 }))
-_call_1 = _call_1["链"](_call_1)
-_call_1 = _call_1["映射"](_call_1, function(self)
+_call_0 = _call_0["链"](_call_0)
+_call_0 = _call_0["映射"](_call_0, function(self)
         return self * 2
 end)
-_call_1 = _call_1["过滤"](_call_1, function(self)
+_call_0 = _call_0["过滤"](_call_0, function(self)
         return self > 3
 end)
-local _u7ed3_u679ca = _call_1["�值"](_call_1)
-local _call_2 = (_({
-        1,
-        2,
-        3,
-        4,
-        -2,
-        3
-}))
-_call_2 = _call_2["链"](_call_2)
-_call_2 = _call_2["映射"](_call_2, function(self)
-        return self * 2
-end)
-_call_2 = _call_2["过滤"](_call_2, function(self)
-        return self > 3
-end)
-_call_2["�一个"](_call_2, function(self)
-        return _u6253_u5370(self)
-end)
-local _call_3 = _u539f_u70b9["��"]["根节点"]["游�对象"]
-_call_3 = _call_3["父节点"](_call_3)
-_call_3 = _call_3["�代"](_call_3)
-_call_3 = _call_3["选择�用"](_call_3)
-_call_3 = _call_3["选择��"](_call_3)
-_call_3 = _call_3["标签等于"](_call_3, "fx")
-_call_3 = _call_3["其中"](_call_3, function(x)
-        local _call_4 = x["�称"]
-        return _call_4["结尾为"](_call_4, "(克隆)")
-end)
-_u7ed3_u679c = _call_3["摧�"](_call_3)
+local _u7ed3_u679ca = _call_0["�值"](_call_0)
 do
-        local _1
-        local _call_4 = _u539f_u70b9["��"]["根节点"]["游�对象"]
-        _1 = _call_4["父节点"](_call_4)
-        local _2
-        _2 = _1["�代"](_1)
-        local _3
-        _3 = _2["选择�用"](_2)
-        local _4
-        _4 = _3["选择��"](_3)
-        local _5
-        _5 = _4["标签等于"](_4, "fx")
-        local _6
-        _6 = _5["其中"](_5, function(x)
-                local _call_5 = x["�称"]
-                return _call_5["结尾为"](_call_5, "(克隆)")
+        local _call_1 = (_({
+                1,
+                2,
+                3,
+                4,
+                -2,
+                3
+        }))
+        _call_1 = _call_1["链"](_call_1)
+        _call_1 = _call_1["映射"](_call_1, function(self)
+                return self * 2
+        end)
+        _call_1 = _call_1["过滤"](_call_1, function(self)
+                return self > 3
+        end)
+        _call_1["�一个"](_call_1, function(self)
+                return _u6253_u5370(self)
         end)
-        _6["摧�"](_6)
+end
+local _call_1 = _u539f_u70b9["��"]["根节点"]["游�对象"]
+_call_1 = _call_1["父节点"](_call_1)
+_call_1 = _call_1["�代"](_call_1)
+_call_1 = _call_1["选择�用"](_call_1)
+_call_1 = _call_1["选择��"](_call_1)
+_call_1 = _call_1["标签等于"](_call_1, "fx")
+_call_1 = _call_1["其中"](_call_1, function(x)
+        local _call_2 = x["�称"]
+        return _call_2["结尾为"](_call_2, "(克隆)")
+end)
+_u7ed3_u679c = _call_1["摧�"](_call_1)
+do
+        do
+                local _1
+                local _call_2 = _u539f_u70b9["��"]["根节点"]["游�对象"]
+                _1 = _call_2["父节点"](_call_2)
+                local _2
+                _2 = _1["�代"](_1)
+                local _3
+                _3 = _2["选择�用"](_2)
+                local _4
+                _4 = _3["选择��"](_3)
+                local _5
+                _5 = _4["标签等于"](_4, "fx")
+                local _6
+                _6 = _5["其中"](_5, function(x)
+                        local _call_3 = x["�称"]
+                        return _call_3["结尾为"](_call_3, "(克隆)")
+                end)
+                _6["摧�"](_6)
+        end
 end
 local _call_0 = _u539f_u70b9["��"]["根节点"]["游�对象"]
 _call_0["父节点"](_call_0):_u540e_u4ee3():_u9009_u62e9_u542f_u7528():_u9009_u62e9_u53ef_u89c1():_u6807_u7b7e_u7b49_u4e8e("fx"):_u5176_u4e2d(function(x)
@@ -302,7 +310,9 @@ _u6253_u5370((setmetatable({
         end
 }))
 _u6253_u5370("当�代�行数: " .. tostring(268))
+do
 -- 待实现
+end
 do
         _u6253_u5370(1)
 end
@@ -317,5 +327,7 @@ _1 = function()
         end
         return _accum_0
 end
-_u6253_u5370('abc')
-return 123
+do
+        _u6253_u5370('abc')
+        return 123
+end
diff --git a/spec/outputs/unicode/metatable.lua b/spec/outputs/unicode/metatable.lua
index b6ee48a..c7c8730 100644
--- a/spec/outputs/unicode/metatable.lua
+++ b/spec/outputs/unicode/metatable.lua
@@ -48,19 +48,17 @@ do
 end
 do
         local _u53d8_u91cfx, _u65b0, _u53d8_u91cf, close, _u5173_u95edA, num, add, sub
+        local _obj_0, _obj_1
+        _u53d8_u91cfx, _obj_0, _obj_1 = 123, _u53d8_u91cfa["��b"]["��c"], _u51fd_u6570()
+        _u65b0, _u53d8_u91cf = _obj_0["新"], _obj_0["��"]
         do
-                local _obj_0, _obj_1
-                _u53d8_u91cfx, _obj_0, _obj_1 = 123, _u53d8_u91cfa["��b"]["��c"], _u51fd_u6570()
-                _u65b0, _u53d8_u91cf = _obj_0["新"], _obj_0["��"]
-                do
-                        local _obj_2 = getmetatable(_obj_0)
-                        close, _u5173_u95edA = _obj_2.__close, _obj_2.__close
-                end
-                num = _obj_1.num
-                do
-                        local _obj_2 = getmetatable(_obj_1)
-                        add, sub = _obj_2.__add, _obj_2.__sub
-                end
+                local _obj_2 = getmetatable(_obj_0)
+                close, _u5173_u95edA = _obj_2.__close, _obj_2.__close
+        end
+        num = _obj_1.num
+        do
+                local _obj_2 = getmetatable(_obj_1)
+                add, sub = _obj_2.__add, _obj_2.__sub
         end
 end
 setmetatable(_u53d8_u91cfa["��b"], { })
diff --git a/spec/outputs/unicode/multiline_chain.lua b/spec/outputs/unicode/multiline_chain.lua
index f45e71f..c1da13f 100644
--- a/spec/outputs/unicode/multiline_chain.lua
+++ b/spec/outputs/unicode/multiline_chain.lua
@@ -127,16 +127,14 @@ do
                 _with_0["项目方法C"](_with_0, _u53d8_u91cfi)
         end
         if not _with_0["��b"] then
-                do
-                        local _accum_0 = { }
-                        local _len_0 = 1
-                        while _with_0["项目字段D"] do
-                                local _call_17 = _with_0["下一个项目"](_with_0)
-                                _accum_0[_len_0] = _call_17["�得"](_call_17)
-                                _len_0 = _len_0 + 1
-                        end
-                        _with_0["��c"] = _accum_0
+                local _accum_0 = { }
+                local _len_0 = 1
+                while _with_0["项目字段D"] do
+                        local _call_17 = _with_0["下一个项目"](_with_0)
+                        _accum_0[_len_0] = _call_17["�得"](_call_17)
+                        _len_0 = _len_0 + 1
                 end
+                _with_0["��c"] = _accum_0
         end
 end
 return nil
diff --git a/spec/outputs/unicode/nil_coalescing.lua b/spec/outputs/unicode/nil_coalescing.lua
index 90fd097..53e3711 100644
--- a/spec/outputs/unicode/nil_coalescing.lua
+++ b/spec/outputs/unicode/nil_coalescing.lua
@@ -1,23 +1,19 @@
 do
         local _u53d8_u91cfa
-        do
-                local _exp_0 = _u53d8_u91cfb
-                if _exp_0 ~= nil then
-                        _u53d8_u91cfa = _exp_0
-                else
-                        _u53d8_u91cfa = _u53d8_u91cfc
-                end
+        local _exp_0 = _u53d8_u91cfb
+        if _exp_0 ~= nil then
+                _u53d8_u91cfa = _exp_0
+        else
+                _u53d8_u91cfa = _u53d8_u91cfc
         end
 end
 do
         local _u5b57_u6bb5a
-        do
-                local _exp_0 = _u53d8_u91cfb
-                if _exp_0 ~= nil then
-                        _u5b57_u6bb5a = _exp_0["字段a"]
-                else
-                        _u5b57_u6bb5a = _u53d8_u91cfc["字段a"]
-                end
+        local _exp_0 = _u53d8_u91cfb
+        if _exp_0 ~= nil then
+                _u5b57_u6bb5a = _exp_0["字段a"]
+        else
+                _u5b57_u6bb5a = _u53d8_u91cfc["字段a"]
         end
 end
 do
@@ -50,23 +46,21 @@ do
 end
 do
         local _u53d8_u91cfa
-        do
-                local _exp_0 = _u53d8_u91cfb
-                if _exp_0 ~= nil then
-                        _u53d8_u91cfa = _exp_0
-                else
-                        do
-                                local _exp_1 = _u53d8_u91cfc
-                                if _exp_1 ~= nil then
-                                        _u53d8_u91cfa = _exp_1
-                                else
-                                        do
-                                                local _exp_2 = _u53d8_u91cfd
-                                                if _exp_2 ~= nil then
-                                                        _u53d8_u91cfa = _exp_2
-                                                else
-                                                        _u53d8_u91cfa = _u53d8_u91cfe
-                                                end
+        local _exp_0 = _u53d8_u91cfb
+        if _exp_0 ~= nil then
+                _u53d8_u91cfa = _exp_0
+        else
+                do
+                        local _exp_1 = _u53d8_u91cfc
+                        if _exp_1 ~= nil then
+                                _u53d8_u91cfa = _exp_1
+                        else
+                                do
+                                        local _exp_2 = _u53d8_u91cfd
+                                        if _exp_2 ~= nil then
+                                                _u53d8_u91cfa = _exp_2
+                                        else
+                                                _u53d8_u91cfa = _u53d8_u91cfe
                                         end
                                 end
                         end
@@ -84,18 +78,14 @@ do
         end)())
 end
 do
-        do
-                local _with_0
-                do
-                        local _exp_0 = _u51fd_u6570A()
-                        if _exp_0 ~= nil then
-                                _with_0 = _exp_0
-                        else
-                                _with_0 = _u51fd_u6570B()
-                        end
-                end
-                _u6253_u5370(_with_0["字段"])
+        local _with_0
+        local _exp_0 = _u51fd_u6570A()
+        if _exp_0 ~= nil then
+                _with_0 = _exp_0
+        else
+                _with_0 = _u51fd_u6570B()
         end
+        _u6253_u5370(_with_0["字段"])
 end
 do
         local _u53d8_u91cfa = 1 + 2 + (function()
@@ -138,18 +128,16 @@ do
 end
 do
         local _u53d8_u91cfa
-        do
-                local _exp_0 = 1
-                if _exp_0 ~= nil then
-                        _u53d8_u91cfa = _exp_0
-                else
-                        do
-                                local _exp_1 = 2
-                                if _exp_1 ~= nil then
-                                        _u53d8_u91cfa = _exp_1
-                                else
-                                        _u53d8_u91cfa = 3
-                                end
+        local _exp_0 = 1
+        if _exp_0 ~= nil then
+                _u53d8_u91cfa = _exp_0
+        else
+                do
+                        local _exp_1 = 2
+                        if _exp_1 ~= nil then
+                                _u53d8_u91cfa = _exp_1
+                        else
+                                _u53d8_u91cfa = 3
                         end
                 end
         end
diff --git a/spec/outputs/unicode/stub.lua b/spec/outputs/unicode/stub.lua
index 5f183a1..426967b 100644
--- a/spec/outputs/unicode/stub.lua
+++ b/spec/outputs/unicode/stub.lua
@@ -15,12 +15,10 @@ end
 _u6253_u5370(_u51fd_u6570())
 _u6253_u5370(_u53d8_u91cfx["值"](_u53d8_u91cfx));
 (function(...)
-        do
-                local _base_0 = _u4f60_u597d(...)
-                local _fn_0 = _base_0["世界"]
-                _u53d8_u91cfx = _fn_0 and function(...)
-                        return _fn_0(_base_0, ...)
-                end
+        local _base_0 = _u4f60_u597d(...)
+        local _fn_0 = _base_0["世界"]
+        _u53d8_u91cfx = _fn_0 and function(...)
+                return _fn_0(_base_0, ...)
         end
 end)()
 return nil
diff --git a/spec/outputs/unicode/switch.lua b/spec/outputs/unicode/switch.lua
index 6b8bbdc..76c078c 100644
--- a/spec/outputs/unicode/switch.lua
+++ b/spec/outputs/unicode/switch.lua
@@ -45,13 +45,11 @@ do
 end
 do
         local _with_0 = _u4e1c_u897f
-        do
-                local _exp_0 = _with_0["值"](_with_0)
-                if _with_0["确定"] == _exp_0 then
-                        local _u53d8_u91cf_ = "世界"
-                else
-                        local _u53d8_u91cf_ = "是的"
-                end
+        local _exp_0 = _with_0["值"](_with_0)
+        if _with_0["确定"] == _exp_0 then
+                local _u53d8_u91cf_ = "世界"
+        else
+                local _u53d8_u91cf_ = "是的"
         end
 end
 _u4fee_u590d(_u8fd9_u4e2a)
@@ -106,66 +104,64 @@ do
                         }
                 }
         }
-        do
-                local _type_0 = type(_u5b57_u5178)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                if _tab_0 then
-                        local _u7b2c_u4e00 = _u5b57_u5178[1]
-                        local _u4e00_u4e2a
-                        do
-                                local _obj_0 = _u5b57_u5178[2]
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        _u4e00_u4e2a = _obj_0[1]
-                                end
+        local _type_0 = type(_u5b57_u5178)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        if _tab_0 then
+                local _u7b2c_u4e00 = _u5b57_u5178[1]
+                local _u4e00_u4e2a
+                do
+                        local _obj_0 = _u5b57_u5178[2]
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                _u4e00_u4e2a = _obj_0[1]
                         end
-                        local _u4e24_u4e2a
-                        do
-                                local _obj_0 = _u5b57_u5178[2]
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        _u4e24_u4e2a = _obj_0[2]
-                                end
+                end
+                local _u4e24_u4e2a
+                do
+                        local _obj_0 = _u5b57_u5178[2]
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                _u4e24_u4e2a = _obj_0[2]
                         end
-                        local _u4e09_u4e2a
-                        do
-                                local _obj_0 = _u5b57_u5178[2]
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        _u4e09_u4e2a = _obj_0[3]
-                                end
+                end
+                local _u4e09_u4e2a
+                do
+                        local _obj_0 = _u5b57_u5178[2]
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                _u4e09_u4e2a = _obj_0[3]
                         end
-                        local _u53d8_u91cfc
-                        do
-                                local _obj_0 = _u5b57_u5178["��a"]
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        do
-                                                local _obj_1 = _obj_0["��b"]
-                                                local _type_2 = type(_obj_1)
-                                                if "table" == _type_2 or "userdata" == _type_2 then
-                                                        _u53d8_u91cfc = _obj_1["��c"]
-                                                end
+                end
+                local _u53d8_u91cfc
+                do
+                        local _obj_0 = _u5b57_u5178["��a"]
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                do
+                                        local _obj_1 = _obj_0["��b"]
+                                        local _type_2 = type(_obj_1)
+                                        if "table" == _type_2 or "userdata" == _type_2 then
+                                                _u53d8_u91cfc = _obj_1["��c"]
                                         end
                                 end
                         end
-                        local _u53d8_u91cfz
-                        do
-                                local _obj_0 = _u5b57_u5178["��x"]
-                                local _type_1 = type(_obj_0)
-                                if "table" == _type_1 or "userdata" == _type_1 then
-                                        do
-                                                local _obj_1 = _obj_0["��y"]
-                                                local _type_2 = type(_obj_1)
-                                                if "table" == _type_2 or "userdata" == _type_2 then
-                                                        _u53d8_u91cfz = _obj_1["��z"]
-                                                end
+                end
+                local _u53d8_u91cfz
+                do
+                        local _obj_0 = _u5b57_u5178["��x"]
+                        local _type_1 = type(_obj_0)
+                        if "table" == _type_1 or "userdata" == _type_1 then
+                                do
+                                        local _obj_1 = _obj_0["��y"]
+                                        local _type_2 = type(_obj_1)
+                                        if "table" == _type_2 or "userdata" == _type_2 then
+                                                _u53d8_u91cfz = _obj_1["��z"]
                                         end
                                 end
                         end
-                        if _u7b2c_u4e00 ~= nil and _u4e00_u4e2a ~= nil and _u4e24_u4e2a ~= nil and _u4e09_u4e2a ~= nil and _u53d8_u91cfc ~= nil and _u53d8_u91cfz ~= nil then
-                                _u6253_u5370(_u7b2c_u4e00, _u4e00_u4e2a, _u4e24_u4e2a, _u4e09_u4e2a, _u53d8_u91cfc, _u53d8_u91cfz)
-                        end
+                end
+                if _u7b2c_u4e00 ~= nil and _u4e00_u4e2a ~= nil and _u4e24_u4e2a ~= nil and _u4e09_u4e2a ~= nil and _u53d8_u91cfc ~= nil and _u53d8_u91cfz ~= nil then
+                        _u6253_u5370(_u7b2c_u4e00, _u4e00_u4e2a, _u4e24_u4e2a, _u4e09_u4e2a, _u53d8_u91cfc, _u53d8_u91cfz)
                 end
         end
 end
@@ -183,56 +179,54 @@ do
         }
         for _index_0 = 1, #_u7269_u54c1 do
                 local _u7269 = _u7269_u54c1[_index_0]
-                do
-                        local _type_0 = type(_u7269)
-                        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                        local _match_0 = false
+                local _type_0 = type(_u7269)
+                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+                local _match_0 = false
+                if _tab_0 then
+                        local _u53d8_u91cfx = _u7269["��x"]
+                        local _u53d8_u91cfy = _u7269["��y"]
+                        if _u53d8_u91cfx ~= nil and _u53d8_u91cfy ~= nil then
+                                _match_0 = true
+                                _u6253_u5370("Vec2 " .. tostring(_u53d8_u91cfx) .. ", " .. tostring(_u53d8_u91cfy))
+                        end
+                end
+                if not _match_0 then
+                        local _match_1 = false
                         if _tab_0 then
-                                local _u53d8_u91cfx = _u7269["��x"]
-                                local _u53d8_u91cfy = _u7269["��y"]
-                                if _u53d8_u91cfx ~= nil and _u53d8_u91cfy ~= nil then
-                                        _match_0 = true
-                                        _u6253_u5370("Vec2 " .. tostring(_u53d8_u91cfx) .. ", " .. tostring(_u53d8_u91cfy))
+                                local _u5bbd_u5ea6 = _u7269["宽度"]
+                                local _u9ad8_u5ea6 = _u7269["高度"]
+                                if _u5bbd_u5ea6 ~= nil and _u9ad8_u5ea6 ~= nil then
+                                        _match_1 = true
+                                        _u6253_u5370("Size " .. tostring(_u5bbd_u5ea6) .. ", " .. tostring(_u9ad8_u5ea6))
                                 end
                         end
-                        if not _match_0 then
-                                local _match_1 = false
-                                if _tab_0 then
-                                        local _u5bbd_u5ea6 = _u7269["宽度"]
-                                        local _u9ad8_u5ea6 = _u7269["高度"]
-                                        if _u5bbd_u5ea6 ~= nil and _u9ad8_u5ea6 ~= nil then
-                                                _match_1 = true
-                                                _u6253_u5370("Size " .. tostring(_u5bbd_u5ea6) .. ", " .. tostring(_u9ad8_u5ea6))
+                        if not _match_1 then
+                                if false == _u7269 then
+                                        _u6253_u5370("没有")
+                                else
+                                        local _match_2 = false
+                                        if _tab_0 then
+                                                local _u7c7b = _u7269["__ç±»"]
+                                                if _u7c7b ~= nil then
+                                                        _match_2 = true
+                                                        if _u7c7b_u522bA == _u7c7b then
+                                                                _u6253_u5370("对象 A")
+                                                        elseif _u7c7b_u522bB == _u7c7b then
+                                                                _u6253_u5370("对象 B")
+                                                        end
+                                                end
                                         end
-                                end
-                                if not _match_1 then
-                                        if false == _u7269 then
-                                                _u6253_u5370("没有")
-                                        else
-                                                local _match_2 = false
+                                        if not _match_2 then
+                                                local _match_3 = false
                                                 if _tab_0 then
-                                                        local _u7c7b = _u7269["__ç±»"]
-                                                        if _u7c7b ~= nil then
-                                                                _match_2 = true
-                                                                if _u7c7b_u522bA == _u7c7b then
-                                                                        _u6253_u5370("对象 A")
-                                                                elseif _u7c7b_u522bB == _u7c7b then
-                                                                        _u6253_u5370("对象 B")
-                                                                end
+                                                        local _u8868 = getmetatable(_u7269)
+                                                        if _u8868 ~= nil then
+                                                                _match_3 = true
+                                                                _u6253_u5370("带有元表的表")
                                                         end
                                                 end
-                                                if not _match_2 then
-                                                        local _match_3 = false
-                                                        if _tab_0 then
-                                                                local _u8868 = getmetatable(_u7269)
-                                                                if _u8868 ~= nil then
-                                                                        _match_3 = true
-                                                                        _u6253_u5370("带有元表的表")
-                                                                end
-                                                        end
-                                                        if not _match_3 then
-                                                                _u6253_u5370("物��被接��")
-                                                        end
+                                                if not _match_3 then
+                                                        _u6253_u5370("物��被接��")
                                                 end
                                         end
                                 end
@@ -271,72 +265,66 @@ do
                         end
                 end
         end
-        do
-                local _type_0 = type(_u8868_u683c)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                local _match_0 = false
-                if _tab_0 then
-                        local _u53d8_u91cfa = _u8868_u683c["��a"]
-                        local _u53d8_u91cfb = _u8868_u683c["��b"]
-                        if _u53d8_u91cfa ~= nil and _u53d8_u91cfb ~= nil then
-                                _match_0 = true
-                                _u6253_u5370(_u53d8_u91cfa, _u53d8_u91cfb)
-                        end
-                end
-                if not _match_0 then
-                        _u6253_u5370("没有匹�")
+        local _type_0 = type(_u8868_u683c)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        local _match_0 = false
+        if _tab_0 then
+                local _u53d8_u91cfa = _u8868_u683c["��a"]
+                local _u53d8_u91cfb = _u8868_u683c["��b"]
+                if _u53d8_u91cfa ~= nil and _u53d8_u91cfb ~= nil then
+                        _match_0 = true
+                        _u6253_u5370(_u53d8_u91cfa, _u53d8_u91cfb)
                 end
         end
+        if not _match_0 then
+                _u6253_u5370("没有匹�")
+        end
 end
 do
         local _u8868_u683c = {
                 ["��x"] = "abc"
         }
-        do
-                local _type_0 = type(_u8868_u683c)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                local _match_0 = false
+        local _type_0 = type(_u8868_u683c)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        local _match_0 = false
+        if _tab_0 then
+                local _u53d8_u91cfx = _u8868_u683c["��x"]
+                local _u53d8_u91cfy = _u8868_u683c["��y"]
+                if _u53d8_u91cfx ~= nil and _u53d8_u91cfy ~= nil then
+                        _match_0 = true
+                        _u6253_u5370("��x: " .. tostring(_u53d8_u91cfx) .. " 和 ��y: " .. tostring(_u53d8_u91cfy))
+                end
+        end
+        if not _match_0 then
                 if _tab_0 then
                         local _u53d8_u91cfx = _u8868_u683c["��x"]
-                        local _u53d8_u91cfy = _u8868_u683c["��y"]
-                        if _u53d8_u91cfx ~= nil and _u53d8_u91cfy ~= nil then
-                                _match_0 = true
-                                _u6253_u5370("��x: " .. tostring(_u53d8_u91cfx) .. " 和 ��y: " .. tostring(_u53d8_u91cfy))
-                        end
-                end
-                if not _match_0 then
-                        if _tab_0 then
-                                local _u53d8_u91cfx = _u8868_u683c["��x"]
-                                if _u53d8_u91cfx ~= nil then
-                                        _u6253_u5370("�有 ��x: " .. tostring(_u53d8_u91cfx))
-                                end
+                        if _u53d8_u91cfx ~= nil then
+                                _u6253_u5370("�有 ��x: " .. tostring(_u53d8_u91cfx))
                         end
                 end
         end
 end
 do
         local _u5339_u914d
-        do
-                local _exp_0 = _u8868_u683c
-                if 1 == _exp_0 then
-                        _u5339_u914d = "1"
-                else
-                        local _type_0 = type(_exp_0)
-                        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                        local _match_0 = false
-                        if _tab_0 then
-                                local _u53d8_u91cfx = _exp_0["��x"]
-                                if _u53d8_u91cfx ~= nil then
-                                        _match_0 = true
-                                        _u5339_u914d = _u53d8_u91cfx
-                                end
+        local _exp_0 = _u8868_u683c
+        if 1 == _exp_0 then
+                _u5339_u914d = "1"
+        else
+                local _type_0 = type(_exp_0)
+                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+                local _match_0 = false
+                if _tab_0 then
+                        local _u53d8_u91cfx = _exp_0["��x"]
+                        if _u53d8_u91cfx ~= nil then
+                                _match_0 = true
+                                _u5339_u914d = _u53d8_u91cfx
                         end
-                        if not _match_0 then
-                                if false == _exp_0 then
-                                        _u5339_u914d = "false"
-                                else
-                                        _u5339_u914d = nil
-                                end
+                end
+                if not _match_0 then
+                        if false == _exp_0 then
+                                _u5339_u914d = "false"
+                        else
+                                _u5339_u914d = nil
                         end
                 end
         end
@@ -346,55 +334,51 @@ do
         if nil == _exp_0 then
                 return "无效"
         else
-                do
-                        local _type_0 = type(_exp_0)
-                        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                        local _match_0 = false
-                        if _tab_0 then
-                                local _u53d8_u91cfa = _exp_0["��a"]
-                                local _u53d8_u91cfb = _exp_0["��b"]
-                                if _u53d8_u91cfa ~= nil and _u53d8_u91cfb ~= nil then
-                                        _match_0 = true
-                                        return tostring(_u53d8_u91cfa + _u53d8_u91cfb)
-                                end
+                local _type_0 = type(_exp_0)
+                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+                local _match_0 = false
+                if _tab_0 then
+                        local _u53d8_u91cfa = _exp_0["��a"]
+                        local _u53d8_u91cfb = _exp_0["��b"]
+                        if _u53d8_u91cfa ~= nil and _u53d8_u91cfb ~= nil then
+                                _match_0 = true
+                                return tostring(_u53d8_u91cfa + _u53d8_u91cfb)
                         end
-                        if not _match_0 then
-                                if 1 == _exp_0 or 2 == _exp_0 or 3 == _exp_0 or 4 == _exp_0 or 5 == _exp_0 then
-                                        return "æ•°å­— 1 - 5"
-                                else
-                                        local _match_1 = false
-                                        if _tab_0 then
-                                                local _u5339_u914d_u4efb_u4f55_u8868_u683c = _exp_0["匹�任何表格"]
-                                                if _u5339_u914d_u4efb_u4f55_u8868_u683c == nil then
-                                                        _u5339_u914d_u4efb_u4f55_u8868_u683c = "�备"
-                                                end
-                                                _match_1 = true
-                                                return _u5339_u914d_u4efb_u4f55_u8868_u683c
-                                        end
-                                        if not _match_1 then
-                                                return "除�它�是一个表格，�则�应到达这里"
+                end
+                if not _match_0 then
+                        if 1 == _exp_0 or 2 == _exp_0 or 3 == _exp_0 or 4 == _exp_0 or 5 == _exp_0 then
+                                return "æ•°å­— 1 - 5"
+                        else
+                                local _match_1 = false
+                                if _tab_0 then
+                                        local _u5339_u914d_u4efb_u4f55_u8868_u683c = _exp_0["匹�任何表格"]
+                                        if _u5339_u914d_u4efb_u4f55_u8868_u683c == nil then
+                                                _u5339_u914d_u4efb_u4f55_u8868_u683c = "�备"
                                         end
+                                        _match_1 = true
+                                        return _u5339_u914d_u4efb_u4f55_u8868_u683c
+                                end
+                                if not _match_1 then
+                                        return "除�它�是一个表格，�则�应到达这里"
                                 end
                         end
                 end
         end
 end
 do
-        do
-                local _exp_0 = _u53d8_u91cfy
-                local _type_0 = type(_exp_0)
-                local _tab_0 = "table" == _type_0 or "userdata" == _type_0
-                if _tab_0 then
-                        local _u8868 = (function()
-                                local _obj_0 = _exp_0["��x"]
-                                if _obj_0 ~= nil then
-                                        return getmetatable(_obj_0)
-                                end
-                                return nil
-                        end)()
-                        if _u8868 ~= nil then
-                                _u6253_u5370(_u8868)
+        local _exp_0 = _u53d8_u91cfy
+        local _type_0 = type(_exp_0)
+        local _tab_0 = "table" == _type_0 or "userdata" == _type_0
+        if _tab_0 then
+                local _u8868 = (function()
+                        local _obj_0 = _exp_0["��x"]
+                        if _obj_0 ~= nil then
+                                return getmetatable(_obj_0)
                         end
+                        return nil
+                end)()
+                if _u8868 ~= nil then
+                        _u6253_u5370(_u8868)
                 end
         end
 end
diff --git a/spec/outputs/unicode/syntax.lua b/spec/outputs/unicode/syntax.lua
index f086db6..9ea8f68 100644
--- a/spec/outputs/unicode/syntax.lua
+++ b/spec/outputs/unicode/syntax.lua
@@ -235,15 +235,11 @@ else
 end
 do
         local _with_0 = _u8868
-        do
-                local _obj_2 = _with_0["��b"]["��c"]
-                do
-                        local _with_1 = _u5411_u91cf
-                        _with_1["字段x"] = 1
-                        _with_1["字段y"] = 2
-                        _obj_2[#_obj_2 + 1] = _with_1
-                end
-        end
+        local _obj_2 = _with_0["��b"]["��c"]
+        local _with_1 = _u5411_u91cf
+        _with_1["字段x"] = 1
+        _with_1["字段y"] = 2
+        _obj_2[#_obj_2 + 1] = _with_1
 end
 do
         local _call_8 = _u5bf9_u8c61a["��b"]["��c"]["��d"]
diff --git a/spec/outputs/unicode/tables.lua b/spec/outputs/unicode/tables.lua
index 28ad6e2..82ca299 100644
--- a/spec/outputs/unicode/tables.lua
+++ b/spec/outputs/unicode/tables.lua
@@ -392,11 +392,9 @@ do
         _tab_0[#_tab_0 + 1] = "b"
         _tab_0[#_tab_0 + 1] = "c"
         local _obj_1
-        do
-                local _obj_2 = _u51fd_u6570
-                if _obj_2 ~= nil then
-                        _obj_1 = _obj_2()
-                end
+        local _obj_2 = _u51fd_u6570
+        if _obj_2 ~= nil then
+                _obj_1 = _obj_2()
         end
         local _idx_1 = 1
         for _key_0, _value_0 in pairs(_obj_1) do
diff --git a/spec/outputs/unicode/vararg.lua b/spec/outputs/unicode/vararg.lua
index 4acb6cc..b837006 100644
--- a/spec/outputs/unicode/vararg.lua
+++ b/spec/outputs/unicode/vararg.lua
@@ -46,57 +46,53 @@ local _anon_func_5 = function(_u9879_u76ee, ...)
 end
 local _anon_func_6 = function(_u51fd_u6570, setmetatable)
         local _u53d8_u91cfA
-        do
-                local _class_0
-                local _base_0 = { }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
+        local _class_0
+        local _base_0 = { }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "��A"
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
                 end
-                _class_0 = setmetatable({
-                        __init = function() end,
-                        __base = _base_0,
-                        __name = "��A"
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                local self = _class_0;
-                _u51fd_u6570()
-                _u53d8_u91cfA = _class_0
-                return _class_0
-        end
+        })
+        _base_0.__class = _class_0
+        local self = _class_0;
+        _u51fd_u6570()
+        _u53d8_u91cfA = _class_0
+        return _class_0
 end
 local _anon_func_7 = function(_u51fd_u6570, setmetatable, ...)
         local _u53d8_u91cfA
-        do
-                local _class_0
-                local _base_0 = { }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
+        local _class_0
+        local _base_0 = { }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "��A"
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
                 end
-                _class_0 = setmetatable({
-                        __init = function() end,
-                        __base = _base_0,
-                        __name = "��A"
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                local self = _class_0;
-                _u51fd_u6570(...)
-                _u53d8_u91cfA = _class_0
-                return _class_0
-        end
+        })
+        _base_0.__class = _class_0
+        local self = _class_0;
+        _u51fd_u6570(...)
+        _u53d8_u91cfA = _class_0
+        return _class_0
 end
 local _anon_func_8 = function(_u8868, pairs)
         local _tbl_0 = { }
diff --git a/spec/outputs/unicode/with.lua b/spec/outputs/unicode/with.lua
index 0dcd4a7..7a5ba00 100644
--- a/spec/outputs/unicode/with.lua
+++ b/spec/outputs/unicode/with.lua
@@ -9,24 +9,20 @@ do
         end
 end
 do
-        do
-                local _with_0 = _u53f6_u5b50
-                _with_0["世界"]()
-                _with_0["世界"](1, 2, 3)
-                local _u53d8_u91cfg = _with_0["什么"]["是"]["这"]
-                _with_0["你好"](1, 2, 3)
-                _with_0["你好"](_with_0, 1, 2)["世界"](2323)
-                _with_0["你好"](_with_0, "是的", "伙计")
-                _with_0["世界"] = 200
-        end
+        local _with_0 = _u53f6_u5b50
+        _with_0["世界"]()
+        _with_0["世界"](1, 2, 3)
+        local _u53d8_u91cfg = _with_0["什么"]["是"]["这"]
+        _with_0["你好"](1, 2, 3)
+        _with_0["你好"](_with_0, 1, 2)["世界"](2323)
+        _with_0["你好"](_with_0, "是的", "伙计")
+        _with_0["世界"] = 200
 end
 do
         local _u6ecb_u6ecb_u6ecb
-        do
-                local _with_0 = _u4e1c_u897f
-                _with_0["设置状�"]("你好 世界")
-                _u6ecb_u6ecb_u6ecb = _with_0
-        end
+        local _with_0 = _u4e1c_u897f
+        _with_0["设置状�"]("你好 世界")
+        _u6ecb_u6ecb_u6ecb = _with_0
 end
 do
         local _u53d8_u91cfx = 5 + (function()
@@ -45,14 +41,12 @@ do
         }
 end
 do
-        do
-                local _with_0 = _u4e1c_u897f
-                local _ = _with_0["属性"](_with_0, "�物")["你好"]
-                local _call_0 = _with_0["属性"]
-                _call_0["��"](_call_0, _u4e00_u4e2a)
-                local _call_1 = _with_0["属性"]
-                _call_1["��"](_call_1, _u4e00_u4e2a)
-        end
+        local _with_0 = _u4e1c_u897f
+        local _ = _with_0["属性"](_with_0, "�物")["你好"]
+        local _call_0 = _with_0["属性"]
+        _call_0["��"](_call_0, _u4e00_u4e2a)
+        local _call_1 = _with_0["属性"]
+        _call_1["��"](_call_1, _u4e00_u4e2a)
 end
 do
         do
@@ -81,69 +75,49 @@ do
                 return _u53d8_u91cfa
         end)())
         local p
-        do
-                local _with_0 = 1
-                _u4f60_u597d()["字段x"], _u4e16_u754c()["字段y"] = _with_0, 2
-                _u6253_u5370(_u53d8_u91cfa + _u53d8_u91cfb)
-                p = _with_0
-        end
+        local _with_0 = 1
+        _u4f60_u597d()["字段x"], _u4e16_u754c()["字段y"] = _with_0, 2
+        _u6253_u5370(_u53d8_u91cfa + _u53d8_u91cfb)
+        p = _with_0
 end
 do
         local _u53d8_u91cfx = "你好"
         _u53d8_u91cfx["大写"](_u53d8_u91cfx)
 end
 do
-        do
-                local _u53d8_u91cfk = "ä¹”"
-                _u6253_u5370(_u53d8_u91cfk["大写"](_u53d8_u91cfk))
-        end
+        local _u53d8_u91cfk = "ä¹”"
+        _u6253_u5370(_u53d8_u91cfk["大写"](_u53d8_u91cfk))
 end
 do
-        do
-                local _u53d8_u91cfa, _u53d8_u91cfb, _u53d8_u91cfc = "", "", ""
-                _u6253_u5370(_u53d8_u91cfa["大写"](_u53d8_u91cfa))
-        end
+        local _u53d8_u91cfa, _u53d8_u91cfb, _u53d8_u91cfc = "", "", ""
+        _u6253_u5370(_u53d8_u91cfa["大写"](_u53d8_u91cfa))
 end
 do
         local _u53d8_u91cfa = "床铺"
-        do
-                local _u53d8_u91cfb, _u53d8_u91cfc
-                _u53d8_u91cfa, _u53d8_u91cfb, _u53d8_u91cfc = "", "", ""
-                _u6253_u5370(_u53d8_u91cfa["大写"](_u53d8_u91cfa))
-        end
+        local _u53d8_u91cfb, _u53d8_u91cfc
+        _u53d8_u91cfa, _u53d8_u91cfb, _u53d8_u91cfc = "", "", ""
+        _u6253_u5370(_u53d8_u91cfa["大写"](_u53d8_u91cfa))
 end
 do
-        do
-                local _with_0 = _u53d8_u91cfj
-                _u6253_u5370(_with_0["大写"](_with_0))
-        end
+        local _with_0 = _u53d8_u91cfj
+        _u6253_u5370(_with_0["大写"](_with_0))
 end
 do
-        do
-                local _with_0 = "ä¹”"
-                _u53d8_u91cfk["��j"] = _with_0
-                _u6253_u5370(_with_0["大写"](_with_0))
-        end
+        local _with_0 = "ä¹”"
+        _u53d8_u91cfk["��j"] = _with_0
+        _u6253_u5370(_with_0["大写"](_with_0))
 end
 do
-        do
-                local _with_0 = _u53d8_u91cfa
-                _u6253_u5370(_with_0.b)
-                do
-                        local _with_1 = _with_0.c
-                        _u6253_u5370(_with_1.d)
-                end
-        end
+        local _with_0 = _u53d8_u91cfa
+        _u6253_u5370(_with_0.b)
+        local _with_1 = _with_0.c
+        _u6253_u5370(_with_1.d)
 end
 do
-        do
-                local _with_0 = _u53d8_u91cfa
-                do
-                        local _with_1 = 2
-                        _with_0.b = _with_1
-                        _u6253_u5370(_with_1.c)
-                end
-        end
+        local _with_0 = _u53d8_u91cfa
+        local _with_1 = 2
+        _with_0.b = _with_1
+        _u6253_u5370(_with_1.c)
 end
 do
         local _
@@ -153,44 +127,38 @@ do
         end
 end
 do
-        do
-                local _with_0 = _u8868_u683c
-                local _call_0 = _u9879_u76ee["字段"]
-                _with_0.x = _call_0["函数"](_call_0, 123)
-        end
+        local _with_0 = _u8868_u683c
+        local _call_0 = _u9879_u76ee["字段"]
+        _with_0.x = _call_0["函数"](_call_0, 123)
 end
 do
-        do
-                local _with_0 = _u7238_u7238
-                _with_0["如果"]("是的")
-                local _u53d8_u91cfy = _with_0["结�"]["函数"]
-        end
+        local _with_0 = _u7238_u7238
+        _with_0["如果"]("是的")
+        local _u53d8_u91cfy = _with_0["结�"]["函数"]
 end
 do
+        local _with_0 = _u8868_u683c
         do
-                local _with_0 = _u8868_u683c
-                do
-                        local _obj_0 = _with_0[2]
-                        if _obj_0 ~= nil then
-                                _with_0[1] = _obj_0["函数"](_obj_0)
-                        end
-                end
-                _with_0["%a-b-c%"] = 123
-                _with_0[ [[x y z]]] = _with_0[_u53d8_u91cf]
-                _u6253_u5370(_with_0[_with_0[3]])
-                do
-                        local _with_1 = _with_0[4]
-                        _with_1[1] = 1
+                local _obj_0 = _with_0[2]
+                if _obj_0 ~= nil then
+                        _with_0[1] = _obj_0["函数"](_obj_0)
                 end
-                _with_0[#_with_0 + 1] = "abc"
-                _with_0[#_with_0 + 1] = {
-                        ["类型"] = "你好",
-                        {
-                                ["�字"] = "xyz",
-                                ["值"] = 998
-                        }
-                }
         end
+        _with_0["%a-b-c%"] = 123
+        _with_0[ [[x y z]]] = _with_0[_u53d8_u91cf]
+        _u6253_u5370(_with_0[_with_0[3]])
+        do
+                local _with_1 = _with_0[4]
+                _with_1[1] = 1
+        end
+        _with_0[#_with_0 + 1] = "abc"
+        _with_0[#_with_0 + 1] = {
+                ["类型"] = "你好",
+                {
+                        ["�字"] = "xyz",
+                        ["值"] = 998
+                }
+        }
 end
 do
         do
@@ -207,16 +175,14 @@ do
         end
 end
 do
-        do
-                local _u63a9_u7801 = _u5b9e_u5fc3_u77e9_u5f62({
-                        ["宽"] = w,
-                        ["高"] = h,
-                        ["颜色"] = 0x66000000
-                })
-                if _u63a9_u7801 ~= nil then
-                        _u63a9_u7801["触摸�用"] = true
-                        _u63a9_u7801["�噬触摸"] = true
-                end
+        local _u63a9_u7801 = _u5b9e_u5fc3_u77e9_u5f62({
+                ["宽"] = w,
+                ["高"] = h,
+                ["颜色"] = 0x66000000
+        })
+        if _u63a9_u7801 ~= nil then
+                _u63a9_u7801["触摸�用"] = true
+                _u63a9_u7801["�噬触摸"] = true
         end
 end
 return nil
diff --git a/spec/outputs/upvalue_func.lua b/spec/outputs/upvalue_func.lua
index 5768d2d..14fe400 100644
--- a/spec/outputs/upvalue_func.lua
+++ b/spec/outputs/upvalue_func.lua
@@ -320,28 +320,26 @@ local _anon_func_13 = function(pairs, tb)
         return _accum_0
 end
 local _anon_func_14 = function(setmetatable)
-        do
-                local _class_0
-                local _base_0 = { }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
+        local _class_0
+        local _base_0 = { }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function(self)
+                        self.value = 1
+                end,
+                __base = _base_0
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
                 end
-                _class_0 = setmetatable({
-                        __init = function(self)
-                                self.value = 1
-                        end,
-                        __base = _base_0
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                return _class_0
-        end
+        })
+        _base_0.__class = _class_0
+        return _class_0
 end
 local _anon_func_15 = function(tb)
         tb.field = 1
diff --git a/spec/outputs/vararg.lua b/spec/outputs/vararg.lua
index 27918e9..dabba44 100644
--- a/spec/outputs/vararg.lua
+++ b/spec/outputs/vararg.lua
@@ -46,57 +46,53 @@ local _anon_func_5 = function(items, ...)
 end
 local _anon_func_6 = function(func, setmetatable)
         local A
-        do
-                local _class_0
-                local _base_0 = { }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
+        local _class_0
+        local _base_0 = { }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "A"
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
                 end
-                _class_0 = setmetatable({
-                        __init = function() end,
-                        __base = _base_0,
-                        __name = "A"
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                local self = _class_0;
-                func()
-                A = _class_0
-                return _class_0
-        end
+        })
+        _base_0.__class = _class_0
+        local self = _class_0;
+        func()
+        A = _class_0
+        return _class_0
 end
 local _anon_func_7 = function(func, setmetatable, ...)
         local A
-        do
-                local _class_0
-                local _base_0 = { }
-                if _base_0.__index == nil then
-                        _base_0.__index = _base_0
+        local _class_0
+        local _base_0 = { }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "A"
+        }, {
+                __index = _base_0,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
                 end
-                _class_0 = setmetatable({
-                        __init = function() end,
-                        __base = _base_0,
-                        __name = "A"
-                }, {
-                        __index = _base_0,
-                        __call = function(cls, ...)
-                                local _self_0 = setmetatable({ }, _base_0)
-                                cls.__init(_self_0, ...)
-                                return _self_0
-                        end
-                })
-                _base_0.__class = _class_0
-                local self = _class_0;
-                func(...)
-                A = _class_0
-                return _class_0
-        end
+        })
+        _base_0.__class = _class_0
+        local self = _class_0;
+        func(...)
+        A = _class_0
+        return _class_0
 end
 local _anon_func_8 = function(pairs, tb)
         local _tbl_0 = { }
diff --git a/spec/outputs/with.lua b/spec/outputs/with.lua
index 304d26e..b2a1c3b 100644
--- a/spec/outputs/with.lua
+++ b/spec/outputs/with.lua
@@ -9,24 +9,20 @@ do
         end
 end
 do
-        do
-                local _with_0 = leaf
-                _with_0.world()
-                _with_0.world(1, 2, 3)
-                local g = _with_0.what.is.this
-                _with_0.hi(1, 2, 3)
-                _with_0:hi(1, 2).world(2323)
-                _with_0:hi("yeah", "man")
-                _with_0.world = 200
-        end
+        local _with_0 = leaf
+        _with_0.world()
+        _with_0.world(1, 2, 3)
+        local g = _with_0.what.is.this
+        _with_0.hi(1, 2, 3)
+        _with_0:hi(1, 2).world(2323)
+        _with_0:hi("yeah", "man")
+        _with_0.world = 200
 end
 do
         local zyzyzy
-        do
-                local _with_0 = something
-                _with_0.set_state("hello world")
-                zyzyzy = _with_0
-        end
+        local _with_0 = something
+        _with_0.set_state("hello world")
+        zyzyzy = _with_0
 end
 do
         local x = 5 + (function()
@@ -45,12 +41,10 @@ do
         }
 end
 do
-        do
-                local _with_0 = foo
-                local _ = _with_0:prop("something").hello
-                _with_0.prop:send(one)
-                _with_0.prop:send(one)
-        end
+        local _with_0 = foo
+        local _ = _with_0:prop("something").hello
+        _with_0.prop:send(one)
+        _with_0.prop:send(one)
 end
 do
         do
@@ -79,69 +73,49 @@ do
                 return a
         end)())
         local p
-        do
-                local _with_0 = 1
-                hello().x, world().y = _with_0, 2
-                print(a + b)
-                p = _with_0
-        end
+        local _with_0 = 1
+        hello().x, world().y = _with_0, 2
+        print(a + b)
+        p = _with_0
 end
 do
         local x = "hello"
         x:upper()
 end
 do
-        do
-                local k = "jo"
-                print(k:upper())
-        end
+        local k = "jo"
+        print(k:upper())
 end
 do
-        do
-                local a, b, c = "", "", ""
-                print(a:upper())
-        end
+        local a, b, c = "", "", ""
+        print(a:upper())
 end
 do
         local a = "bunk"
-        do
-                local b, c
-                a, b, c = "", "", ""
-                print(a:upper())
-        end
+        local b, c
+        a, b, c = "", "", ""
+        print(a:upper())
 end
 do
-        do
-                local _with_0 = j
-                print(_with_0:upper())
-        end
+        local _with_0 = j
+        print(_with_0:upper())
 end
 do
-        do
-                local _with_0 = "jo"
-                k.j = _with_0
-                print(_with_0:upper())
-        end
+        local _with_0 = "jo"
+        k.j = _with_0
+        print(_with_0:upper())
 end
 do
-        do
-                local _with_0 = a
-                print(_with_0.b)
-                do
-                        local _with_1 = _with_0.c
-                        print(_with_1.d)
-                end
-        end
+        local _with_0 = a
+        print(_with_0.b)
+        local _with_1 = _with_0.c
+        print(_with_1.d)
 end
 do
-        do
-                local _with_0 = a
-                do
-                        local _with_1 = 2
-                        _with_0.b = _with_1
-                        print(_with_1.c)
-                end
-        end
+        local _with_0 = a
+        local _with_1 = 2
+        _with_0.b = _with_1
+        print(_with_1.c)
 end
 do
         local _
@@ -151,43 +125,37 @@ do
         end
 end
 do
-        do
-                local _with_0 = tb
-                _with_0.x = item.field:func(123)
-        end
+        local _with_0 = tb
+        _with_0.x = item.field:func(123)
 end
 do
-        do
-                local _with_0 = dad
-                _with_0["if"]("yes")
-                local y = _with_0["end"].of["function"]
-        end
+        local _with_0 = dad
+        _with_0["if"]("yes")
+        local y = _with_0["end"].of["function"]
 end
 do
+        local _with_0 = tb
         do
-                local _with_0 = tb
-                do
-                        local _obj_0 = _with_0[2]
-                        if _obj_0 ~= nil then
-                                _with_0[1] = _obj_0:func()
-                        end
-                end
-                _with_0["%a-b-c%"] = 123
-                _with_0[ [[x y z]]] = _with_0[var]
-                print(_with_0[_with_0[3]])
-                do
-                        local _with_1 = _with_0[4]
-                        _with_1[1] = 1
+                local _obj_0 = _with_0[2]
+                if _obj_0 ~= nil then
+                        _with_0[1] = _obj_0:func()
                 end
-                _with_0[#_with_0 + 1] = "abc"
-                _with_0[#_with_0 + 1] = {
-                        type = "hello",
-                        {
-                                name = "xyz",
-                                value = 998
-                        }
-                }
         end
+        _with_0["%a-b-c%"] = 123
+        _with_0[ [[x y z]]] = _with_0[var]
+        print(_with_0[_with_0[3]])
+        do
+                local _with_1 = _with_0[4]
+                _with_1[1] = 1
+        end
+        _with_0[#_with_0 + 1] = "abc"
+        _with_0[#_with_0 + 1] = {
+                type = "hello",
+                {
+                        name = "xyz",
+                        value = 998
+                }
+        }
 end
 do
         do
@@ -204,16 +172,14 @@ do
         end
 end
 do
-        do
-                local mask = SolidRect({
-                        width = w,
-                        height = h,
-                        color = 0x66000000
-                })
-                if mask ~= nil then
-                        mask.touchEnabled = true
-                        mask.swallowTouches = true
-                end
+        local mask = SolidRect({
+                width = w,
+                height = h,
+                color = 0x66000000
+        })
+        if mask ~= nil then
+                mask.touchEnabled = true
+                mask.swallowTouches = true
         end
 end
 return nil
diff --git a/src/yuescript/yue_compiler.cpp b/src/yuescript/yue_compiler.cpp
index 1864846..ae6c0e4 100644
--- a/src/yuescript/yue_compiler.cpp
+++ b/src/yuescript/yue_compiler.cpp
@@ -75,7 +75,7 @@ static std::unordered_set<std::string> Metamethods = {
         "close"s // Lua 5.4
 };
 
-const std::string_view version = "0.23.0"sv;
+const std::string_view version = "0.23.1"sv;
 const std::string_view extension = "yue"sv;
 
 class CompileError : public std::logic_error {
@@ -431,6 +431,7 @@ private:
         };
         struct Scope {
                 GlobalMode mode = GlobalMode::None;
+                bool lastStatement = false;
                 std::unique_ptr<std::unordered_map<std::string, VarType>> vars;
                 std::unique_ptr<std::unordered_set<std::string>> allows;
                 std::unique_ptr<std::unordered_set<std::string>> globals;
@@ -1854,12 +1855,17 @@ private:
                         preAssignment->expList.set(preExplist);
                         str_list temp;
                         temp.push_back(getPreDefineLine(assignment));
-                        temp.push_back(indent() + "do"s + nll(assignment));
-                        pushScope();
+                        bool needScope = !currentScope().lastStatement;
+                        if (needScope) {
+                                temp.push_back(indent() + "do"s + nll(assignment));
+                                pushScope();
+                        }
                         transformAssignmentCommon(preAssignment, temp);
                         transformAssignment(assignment, temp);
-                        popScope();
-                        temp.push_back(indent() + "end"s + nll(assignment));
+                        if (needScope) {
+                                popScope();
+                                temp.push_back(indent() + "end"s + nll(assignment));
+                        }
                         out.push_back(join(temp));
                         return;
                         BLOCK_END
@@ -1906,11 +1912,14 @@ private:
                                                 }
                                         }
                                         auto varName = singleVariableFrom(tmpChain, AccessType::Write);
-                                        bool isScoped = false;
+                                        bool needScope = !currentScope().lastStatement;
+                                        bool extraScoped = false;
                                         if (varName.empty() || !isLocal(varName)) {
-                                                isScoped = true;
-                                                temp.push_back(indent() + "do"s + nll(x));
-                                                pushScope();
+                                                if (needScope) {
+                                                        extraScoped = true;
+                                                        temp.push_back(indent() + "do"s + nll(x));
+                                                        pushScope();
+                                                }
                                                 auto objVar = getUnusedName("_obj_"sv);
                                                 auto newAssignment = x->new_ptr<ExpListAssign_t>();
                                                 newAssignment->expList.set(toAst<ExpList_t>(objVar, x));
@@ -1929,7 +1938,7 @@ private:
                                         assign->values.push_back(*vit);
                                         newAssignment->action.set(assign);
                                         transformAssignment(newAssignment, temp);
-                                        if (isScoped) {
+                                        if (extraScoped) {
                                                 popScope();
                                                 temp.push_back(indent() + "end"s + nlr(x));
                                         }
@@ -2126,6 +2135,8 @@ private:
                 } else {
                         auto x = assignment;
                         str_list temp;
+                        bool needScope = !currentScope().lastStatement;
+                        bool extraScope = false;
                         if (info.extraScope) {
                                 str_list defs;
                                 for (auto& destruct : info.destructures) {
@@ -2144,8 +2155,11 @@ private:
                                         }
                                         temp.push_back(indent() + "local "s + join(defs, ", "sv) + nll(x));
                                 }
-                                temp.push_back(indent() + "do"s + nll(x));
-                                pushScope();
+                                if (needScope) {
+                                        extraScope = true;
+                                        temp.push_back(indent() + "do"s + nll(x));
+                                        pushScope();
+                                }
                         }
                         if (info.assignment) {
                                 transformAssignmentCommon(info.assignment, temp);
@@ -2355,7 +2369,7 @@ private:
                                         temp.push_back(clearBuf());
                                 }
                         }
-                        if (info.extraScope) {
+                        if (extraScope) {
                                 popScope();
                                 temp.push_back(indent() + "end"s + nlr(x));
                         }
@@ -3202,6 +3216,7 @@ private:
                 auto asmt = firstIfCond->assignment.get();
                 bool storingValue = false;
                 ast_ptr<false, ExpListAssign_t> extraAssignment;
+                bool extraScope = false;
                 if (asmt) {
                         auto exp = firstIfCond->condition.get();
                         auto x = exp;
@@ -3218,8 +3233,11 @@ private:
                                 }
                                 if (storingValue) {
                                         if (usage != ExpUsage::Closure) {
-                                                temp.push_back(indent() + "do"s + nll(asmt));
-                                                pushScope();
+                                                if (!currentScope().lastStatement) {
+                                                        extraScope = true;
+                                                        temp.push_back(indent() + "do"s + nll(asmt));
+                                                        pushScope();
+                                                }
                                         }
                                         auto expList = toAst<ExpList_t>(desVar, x);
                                         auto assignment = x->new_ptr<ExpListAssign_t>();
@@ -3248,8 +3266,11 @@ private:
                                 if (!isDefined(var)) {
                                         storingValue = true;
                                         if (usage != ExpUsage::Closure) {
-                                                temp.push_back(indent() + "do"s + nll(asmt));
-                                                pushScope();
+                                                if (!currentScope().lastStatement) {
+                                                        extraScope = true;
+                                                        temp.push_back(indent() + "do"s + nll(asmt));
+                                                        pushScope();
+                                                }
                                         }
                                 }
                                 auto expList = x->new_ptr<ExpList_t>();
@@ -3295,7 +3316,7 @@ private:
                                 break;
                         }
                 }
-                if (storingValue && usage != ExpUsage::Closure) {
+                if (extraScope) {
                         popScope();
                         temp.push_back(indent() + "end"s + nlr(nodes.front()));
                 }
@@ -3823,9 +3844,12 @@ private:
                 auto objVar = singleVariableFrom(left, AccessType::Read);
                 auto prepareValue = [&](bool forAssignment = false) {
                         if (objVar.empty() || !isLocal(objVar)) {
+                                bool extraScope = !currentScope().lastStatement;
                                 if (forAssignment) {
-                                        temp.push_back(indent() + "do"s + nll(x));
-                                        pushScope();
+                                        if (extraScope) {
+                                                temp.push_back(indent() + "do"s + nll(x));
+                                                pushScope();
+                                        }
                                 }
                                 objVar = getUnusedName("_exp_"sv);
                                 auto expList = toAst<ExpList_t>(objVar, x);
@@ -3835,7 +3859,7 @@ private:
                                 assignment->expList.set(expList);
                                 assignment->action.set(assign);
                                 transformAssignment(assignment, temp);
-                                return forAssignment;
+                                return extraScope;
                         }
                         return false;
                 };
@@ -4531,6 +4555,7 @@ private:
                 if (!nodes.empty()) {
                         str_list temp;
                         for (auto node : nodes) {
+                                currentScope().lastStatement = (node == nodes.back()) && currentScope().mode == GlobalMode::None;
                                 transformStatement(static_cast<Statement_t*>(node), temp);
                                 if (isRoot && !_rootDefs.empty()) {
                                         auto last = std::move(temp.back());
@@ -5166,12 +5191,14 @@ private:
                         auto objVar = singleVariableFrom(partOne, AccessType::Read);
                         bool isScoped = false;
                         if (objVar.empty() || !isLocal(objVar)) {
-                                switch (usage) {
-                                        case ExpUsage::Common:
-                                        case ExpUsage::Assignment:
-                                                isScoped = true;
-                                                break;
-                                        default: break;
+                                if (!currentScope().lastStatement) {
+                                        switch (usage) {
+                                                case ExpUsage::Common:
+                                                case ExpUsage::Assignment:
+                                                        isScoped = true;
+                                                        break;
+                                                default: break;
+                                        }
                                 }
                                 if (isScoped) {
                                         temp.push_back(indent() + "do"s + nll(x));
@@ -5302,10 +5329,13 @@ private:
                         auto x = chainList.front();
                         str_list temp;
                         std::string* funcStart = nullptr;
+                        bool isScoped = !currentScope().lastStatement;
                         switch (usage) {
                                 case ExpUsage::Assignment:
-                                        temp.push_back(indent() + "do"s + nll(x));
-                                        pushScope();
+                                        if (isScoped) {
+                                                temp.push_back(indent() + "do"s + nll(x));
+                                                pushScope();
+                                        }
                                         break;
                                 case ExpUsage::Closure:
                                         pushAnonFunctionScope();
@@ -5378,8 +5408,10 @@ private:
                         }
                         switch (usage) {
                                 case ExpUsage::Assignment:
-                                        popScope();
-                                        temp.push_back(indent() + "end"s + nlr(x));
+                                        if (isScoped) {
+                                                popScope();
+                                                temp.push_back(indent() + "end"s + nlr(x));
+                                        }
                                         break;
                                 case ExpUsage::Closure:
                                         popScope();
@@ -5432,6 +5464,7 @@ private:
                         case id<ColonChainItem_t>(): {
                                 auto colon = static_cast<ColonChainItem_t*>(*opIt);
                                 auto meta = colon->name.to<Metamethod_t>();
+                                bool isScoped = !currentScope().lastStatement;
                                 switch (meta->item->get_id()) {
                                         case id<Name_t>(): {
                                                 auto name = _parser.toString(meta->item);
@@ -5457,8 +5490,10 @@ private:
                                                         funcStart = &temp.emplace_back();
                                                         pushScope();
                                                 } else if (usage != ExpUsage::Return) {
-                                                        temp.push_back(indent() + "do"s + nll(x));
-                                                        pushScope();
+                                                        if (isScoped) {
+                                                                temp.push_back(indent() + "do"s + nll(x));
+                                                                pushScope();
+                                                        }
                                                 }
                                                 auto var = getUnusedName("_obj_"sv);
                                                 auto target = toAst<Exp_t>(var, x);
@@ -5513,14 +5548,18 @@ private:
                                                                 assign->values.push_back(newChainExp);
                                                                 assignment->action.set(assign);
                                                                 transformAssignment(assignment, temp);
-                                                                popScope();
-                                                                temp.push_back(indent() + "end"s + nlr(x));
+                                                                if (isScoped) {
+                                                                        popScope();
+                                                                        temp.push_back(indent() + "end"s + nlr(x));
+                                                                }
                                                                 break;
                                                         }
                                                         case ExpUsage::Common:
                                                                 transformExp(newChainExp, temp, usage);
-                                                                popScope();
-                                                                temp.push_back(indent() + "end"s + nlr(x));
+                                                                if (isScoped) {
+                                                                        popScope();
+                                                                        temp.push_back(indent() + "end"s + nlr(x));
+                                                                }
                                                                 break;
                                                 }
                                                 out.push_back(join(temp));
@@ -6060,36 +6099,6 @@ private:
                                 if (auto blockEnd = info.node.as<BlockEnd_t>()) {
                                         auto block = blockEnd->block.get();
                                         info.node.set(block);
-                                        for (auto stmt_ : block->statements.objects()) {
-                                                auto stmt = static_cast<Statement_t*>(stmt_);
-                                                if (auto global = stmt->content.as<Global_t>()) {
-                                                        if (global->item.is<GlobalOp_t>()) {
-                                                                throw CompileError("can not use global statement with wildcard operator in macro"sv, x);
-                                                        }
-                                                } else if (auto local = stmt->content.as<Local_t>()) {
-                                                        if (local->item.is<LocalFlag_t>()) {
-                                                                throw CompileError("can not use local statement with wildcard operator in macro"sv, x);
-                                                        }
-                                                } else if (auto localAttrib = stmt->content.as<LocalAttrib_t>()) {
-                                                        if (localAttrib->attrib.is<CloseAttrib_t>()) {
-                                                                throw CompileError("can not use close attribute statement in macro"sv, x);
-                                                        }
-                                                } else if (stmt->content.as<Backcall_t>()) {
-                                                        throw CompileError("can not use back call statement in macro"sv, x);
-                                                } else if (auto expListAssign = stmt->content.as<ExpListAssign_t>();
-                                                        expListAssign && expListAssign->action && expListAssign->action.is<Assign_t>()) {
-                                                        BLOCK_START
-                                                        auto unary = singleUnaryExpFrom(expListAssign->expList->exprs.back());
-                                                        BREAK_IF(!unary->ops.empty());
-                                                        auto value = static_cast<Value_t*>(unary->expos.front());
-                                                        auto simpleValue = value->item.as<SimpleValue_t>();
-                                                        BREAK_IF(!simpleValue);
-                                                        auto varArg = simpleValue->value.as<VarArg_t>();
-                                                        BREAK_IF(!varArg);
-                                                        throw CompileError("can not use variadic arguments assignment statement in macro"sv, x);
-                                                        BLOCK_END
-                                                }
-                                        }
                                 }
                                 return {info.node, std::move(info.codes), Empty, std::move(localVars)};
                         } else {
@@ -6118,7 +6127,15 @@ private:
                                 return;
                         }
                         if (usage == ExpUsage::Common || (usage == ExpUsage::Return && node.is<Block_t>())) {
-                                transformBlock(node.to<Block_t>(), out, usage, assignList);
+                                if (node.to<Block_t>()->statements.empty()) {
+                                        out.push_back(Empty);
+                                } else {
+                                        auto doBody = node->new_ptr<Body_t>();
+                                        doBody->content.set(node);
+                                        auto doNode = node->new_ptr<Do_t>();
+                                        doNode->body.set(doBody);
+                                        transformDo(doNode, out, usage, assignList);
+                                }
                         } else {
                                 auto x = chainValue;
                                 switch (usage) {
@@ -6428,6 +6445,7 @@ private:
                         }
                         if (varName.empty()) {
                                 str_list temp;
+                                bool isScoped = !currentScope().lastStatement;
                                 if (usage == ExpUsage::Closure) {
                                         if (transformAsUpValueFunc(newExp(unary_exp, unary_exp), out)) {
                                                 return;
@@ -6436,8 +6454,10 @@ private:
                                         pushAnonVarArg();
                                         pushScope();
                                 } else if (usage == ExpUsage::Assignment) {
-                                        temp.push_back(indent() + "do"s + nll(x));
-                                        pushScope();
+                                        if (isScoped) {
+                                                temp.push_back(indent() + "do"s + nll(x));
+                                                pushScope();
+                                        }
                                 }
                                 auto newUnaryExp = x->new_ptr<UnaryExp_t>();
                                 newUnaryExp->ops.dup(unary_exp->ops);
@@ -6485,8 +6505,10 @@ private:
                                         popAnonVarArg();
                                         popFunctionScope();
                                 } else if (usage == ExpUsage::Assignment) {
-                                        popScope();
-                                        temp.push_back(indent() + "end"s + nll(x));
+                                        if (isScoped) {
+                                                popScope();
+                                                temp.push_back(indent() + "end"s + nll(x));
+                                        }
                                         out.push_back(join(temp));
                                 } else {
                                         out.push_back(join(temp));
@@ -6573,6 +6595,7 @@ private:
 
         void transformSpreadTable(const node_container& values, str_list& out, ExpUsage usage, ExpList_t* assignList = nullptr) {
                 auto x = values.front();
+                bool extraScope = false;
                 switch (usage) {
                         case ExpUsage::Closure: {
                                 auto tableLit = x->new_ptr<TableLit_t>();
@@ -6590,7 +6613,10 @@ private:
                                 break;
                         }
                         case ExpUsage::Assignment:
-                                pushScope();
+                                if (!currentScope().lastStatement) {
+                                        extraScope = true;
+                                        pushScope();
+                                }
                                 break;
                         default:
                                 break;
@@ -6850,9 +6876,11 @@ private:
                                 assignment->expList.set(assignList);
                                 assignment->action.set(assign);
                                 transformAssignment(assignment, temp);
-                                popScope();
+                                if (extraScope) popScope();
                                 out.push_back(join(temp));
-                                out.back() = indent() + "do"s + nll(x) + out.back() + indent() + "end"s + nlr(x);
+                                if (extraScope) {
+                                        out.back() = indent() + "do"s + nll(x) + out.back() + indent() + "end"s + nlr(x);
+                                }
                                 break;
                         }
                         case ExpUsage::Return:
@@ -7107,6 +7135,7 @@ private:
                 if (!def || def->defVal) {
                         throw CompileError("invalid comprehension expression", comp->items.front());
                 }
+                bool extraScope = false;
                 switch (usage) {
                         case ExpUsage::Closure: {
                                 auto simpleValue = x->new_ptr<SimpleValue_t>();
@@ -7120,7 +7149,10 @@ private:
                                 break;
                         }
                         case ExpUsage::Assignment:
-                                pushScope();
+                                if (!currentScope().lastStatement) {
+                                        extraScope = true;
+                                        pushScope();
+                                }
                                 break;
                         default:
                                 break;
@@ -7191,8 +7223,11 @@ private:
                                 assignment->expList.set(assignList);
                                 assignment->action.set(assign);
                                 transformAssignment(assignment, temp);
-                                popScope();
-                                out.back() = indent() + "do"s + nll(comp) + out.back() + temp.back() + indent() + "end"s + nlr(comp);
+                                out.back().append(temp.back());
+                                if (extraScope) {
+                                        popScope();
+                                        out.back() = indent() + "do"s + nll(comp) + out.back() + indent() + "end"s + nlr(comp);
+                                }
                                 break;
                         }
                         case ExpUsage::Return:
@@ -7204,13 +7239,14 @@ private:
                 }
         }
 
-        bool transformForEachHead(AssignableNameList_t* nameList, ast_node* loopTarget, str_list& out, bool isStatement = false) {
+        bool transformForEachHead(AssignableNameList_t* nameList, ast_node* loopTarget, str_list& out, bool inClosure) {
                 auto x = nameList;
                 str_list temp;
                 str_list vars;
                 str_list varBefore, varAfter;
                 std::string varConstAfter;
                 bool extraScope = false;
+                bool needScope = !currentScope().lastStatement;
                 std::list<std::pair<ast_node*, ast_ptr<false, ast_node>>> destructPairs;
                 for (auto _item : nameList->items.objects()) {
                         auto item = static_cast<NameOrDestructure_t*>(_item)->item.get();
@@ -7287,7 +7323,7 @@ private:
                                 }
                                 if (listVar.empty()) {
                                         std::string prefix;
-                                        if (isStatement) {
+                                        if (!inClosure && needScope) {
                                                 extraScope = true;
                                                 prefix = indent() + "do"s + nll(x);
                                                 pushScope();
@@ -7300,7 +7336,7 @@ private:
                                 std::string maxVar;
                                 if (!stopValue.empty()) {
                                         std::string prefix;
-                                        if (isStatement && !extraScope) {
+                                        if (!extraScope && !inClosure && needScope) {
                                                 extraScope = true;
                                                 prefix = indent() + "do"s + nll(x);
                                                 pushScope();
@@ -7376,7 +7412,7 @@ private:
         }
 
         void transformCompForEach(CompForEach_t* comp, str_list& out) {
-                transformForEachHead(comp->nameList, comp->loopValue, out);
+                transformForEachHead(comp->nameList, comp->loopValue, out, true);
         }
 
         void transformInvokeArgs(InvokeArgs_t* invokeArgs, str_list& out) {
@@ -7741,9 +7777,12 @@ private:
         void transformForInPlace(For_t* forNode, str_list& out, ExpList_t* assignExpList = nullptr) {
                 auto x = forNode;
                 str_list temp;
+                bool isScoped = !currentScope().lastStatement;
                 if (assignExpList) {
-                        _buf << indent() << "do"sv << nll(forNode);
-                        pushScope();
+                        if (isScoped) {
+                                _buf << indent() << "do"sv << nll(forNode);
+                                pushScope();
+                        }
                         auto accum = transformForInner(forNode, temp);
                         auto assign = x->new_ptr<Assign_t>();
                         assign->values.push_back(toAst<Exp_t>(accum, x));
@@ -7751,8 +7790,10 @@ private:
                         assignment->expList.set(assignExpList);
                         assignment->action.set(assign);
                         transformAssignment(assignment, temp);
-                        popScope();
-                        temp.push_back(indent() + "end"s + nlr(forNode));
+                        if (isScoped) {
+                                popScope();
+                                temp.push_back(indent() + "end"s + nlr(forNode));
+                        }
                 } else {
                         auto accum = transformForInner(forNode, temp);
                         auto returnNode = x->new_ptr<Return_t>();
@@ -7783,11 +7824,11 @@ private:
 
         void transformForEach(ForEach_t* forEach, str_list& out) {
                 str_list temp;
-                bool extraScope = transformForEachHead(forEach->nameList, forEach->loopValue, temp, true);
+                bool extraScoped = transformForEachHead(forEach->nameList, forEach->loopValue, temp, false);
                 transformLoopBody(forEach->body, temp, Empty, ExpUsage::Common);
                 popScope();
                 out.push_back(temp.front() + temp.back() + indent() + "end"s + nlr(forEach));
-                if (extraScope) {
+                if (extraScoped) {
                         popScope();
                         out.back().append(indent() + "end"s + nlr(forEach));
                 }
@@ -7802,7 +7843,7 @@ private:
                 _buf << indent() << "local "sv << accum << " = { }"sv << nll(forEach);
                 _buf << indent() << "local "sv << len << " = 1"sv << nll(forEach);
                 out.push_back(clearBuf());
-                transformForEachHead(forEach->nameList, forEach->loopValue, out);
+                transformForEachHead(forEach->nameList, forEach->loopValue, out, true);
                 auto expList = toAst<ExpList_t>(accum + '[' + len + ']', x);
                 auto lenLine = len + " = "s + len + " + 1"s + nlr(forEach->body);
                 transformLoopBody(forEach->body, out, lenLine, ExpUsage::Assignment, expList);
@@ -7835,9 +7876,12 @@ private:
         void transformForEachInPlace(ForEach_t* forEach, str_list& out, ExpList_t* assignExpList = nullptr) {
                 auto x = forEach;
                 str_list temp;
+                bool isScoped = !currentScope().lastStatement;
                 if (assignExpList) {
-                        _buf << indent() << "do"sv << nll(forEach);
-                        pushScope();
+                        if (isScoped) {
+                                _buf << indent() << "do"sv << nll(forEach);
+                                pushScope();
+                        }
                         auto accum = transformForEachInner(forEach, temp);
                         auto assign = x->new_ptr<Assign_t>();
                         assign->values.push_back(toAst<Exp_t>(accum, x));
@@ -7845,8 +7889,10 @@ private:
                         assignment->expList.set(assignExpList);
                         assignment->action.set(assign);
                         transformAssignment(assignment, temp);
-                        popScope();
-                        temp.push_back(indent() + "end"s + nlr(forEach));
+                        if (isScoped) {
+                                popScope();
+                                temp.push_back(indent() + "end"s + nlr(forEach));
+                        }
                 } else {
                         auto accum = transformForEachInner(forEach, temp);
                         auto returnNode = x->new_ptr<Return_t>();
@@ -8035,6 +8081,7 @@ private:
                 std::string className;
                 std::string assignItem;
                 std::string classTextName;
+                bool isScoped = !currentScope().lastStatement;
                 if (assignable) {
                         if (!isAssignable(assignable)) {
                                 throw CompileError("left hand expression is not assignable"sv, assignable);
@@ -8078,8 +8125,10 @@ private:
                                 }
                         }
                 }
-                temp.push_back(indent() + "do"s + nll(classDecl));
-                pushScope();
+                if (isScoped) {
+                        temp.push_back(indent() + "do"s + nll(classDecl));
+                        pushScope();
+                }
                 auto classVar = getUnusedName("_class_"sv);
                 addToScope(classVar);
                 temp.push_back(indent() + "local "s + classVar + nll(classDecl));
@@ -8295,8 +8344,10 @@ private:
                         default: break;
                 }
                 temp.push_back(clearBuf());
-                popScope();
-                temp.push_back(indent() + "end"s + nlr(classDecl));
+                if (isScoped) {
+                        popScope();
+                        temp.push_back(indent() + "end"s + nlr(classDecl));
+                }
                 out.push_back(join(temp));
         }
 
@@ -8469,7 +8520,8 @@ private:
                 auto x = with;
                 str_list temp;
                 std::string withVar;
-                bool scoped = false;
+                bool needScope = !currentScope().lastStatement && !returnValue;
+                bool extraScope = false;
                 if (with->assigns) {
                         auto vars = getAssignVars(with);
                         if (vars.front().empty() || isDeclaredAsGlobal(vars.front())) {
@@ -8486,8 +8538,8 @@ private:
                                         auto assign = x->new_ptr<Assign_t>();
                                         assign->values.push_back(with->assigns->values.objects().front());
                                         assignment->action.set(assign);
-                                        if (!returnValue) {
-                                                scoped = true;
+                                        if (needScope) {
+                                                extraScope = true;
                                                 temp.push_back(indent() + "do"s + nll(with));
                                                 pushScope();
                                         }
@@ -8512,8 +8564,8 @@ private:
                                 auto assignment = x->new_ptr<ExpListAssign_t>();
                                 assignment->expList.set(with->valueList);
                                 assignment->action.set(with->assigns);
-                                if (!returnValue) {
-                                        scoped = true;
+                                if (needScope) {
+                                        extraScope = true;
                                         temp.push_back(indent() + "do"s + nll(with));
                                         pushScope();
                                 }
@@ -8528,17 +8580,17 @@ private:
                                 auto assign = x->new_ptr<Assign_t>();
                                 assign->values.dup(with->valueList->exprs);
                                 assignment->action.set(assign);
-                                if (!returnValue) {
-                                        scoped = true;
+                                if (needScope) {
+                                        extraScope = true;
                                         temp.push_back(indent() + "do"s + nll(with));
                                         pushScope();
                                 }
                                 transformAssignment(assignment, temp);
                         }
                 }
-                if (!with->eop && !scoped && !returnValue) {
+                if (needScope && !with->eop && !extraScope) {
                         pushScope();
-                        scoped = traversal::Stop == with->body->traverse([&](ast_node* node) {
+                        extraScope = traversal::Stop == with->body->traverse([&](ast_node* node) {
                                 if (auto statement = ast_cast<Statement_t>(node)) {
                                         ClassDecl_t* clsDecl = nullptr;
                                         if (auto assignment = assignmentFrom(statement)) {
@@ -8576,7 +8628,7 @@ private:
                                 return traversal::Continue;
                         });
                         popScope();
-                        if (scoped) {
+                        if (extraScope) {
                                 temp.push_back(indent() + "do"s + nll(with));
                                 pushScope();
                         }
@@ -8606,7 +8658,7 @@ private:
                                 temp.push_back(indent() + "return "s + withVar + nll(with));
                         }
                 }
-                if (scoped) {
+                if (extraScope) {
                         popScope();
                         temp.push_back(indent() + "end"s + nll(with));
                 }
@@ -8863,6 +8915,7 @@ private:
         }
 
         void transformTblComprehension(TblComprehension_t* comp, str_list& out, ExpUsage usage, ExpList_t* assignList = nullptr) {
+                bool extraScope = false;
                 switch (usage) {
                         case ExpUsage::Closure: {
                                 auto simpleValue = comp->new_ptr<SimpleValue_t>();
@@ -8876,7 +8929,10 @@ private:
                                 break;
                         }
                         case ExpUsage::Assignment:
-                                pushScope();
+                                if (!currentScope().lastStatement) {
+                                        extraScope = true;
+                                        pushScope();
+                                }
                                 break;
                         default:
                                 break;
@@ -8944,9 +9000,11 @@ private:
                                 assignment->action.set(assign);
                                 transformAssignment(assignment, temp);
                                 out.back().append(temp.back());
-                                popScope();
-                                out.back().insert(0, indent() + "do"s + nll(comp));
-                                out.back().append(indent() + "end"s + nlr(comp));
+                                if (extraScope) {
+                                        popScope();
+                                        out.back().insert(0, indent() + "do"s + nll(comp));
+                                        out.back().append(indent() + "end"s + nlr(comp));
+                                }
                                 break;
                         }
                         case ExpUsage::Return:
@@ -8986,18 +9044,20 @@ private:
                         pushAnonFunctionScope();
                         pushAnonVarArg();
                         funcStart = &temp.emplace_back();
+                        pushScope();
                 } else {
                         temp.push_back(indent() + "do"s + nll(doNode));
+                        pushScope();
                 }
-                pushScope();
                 transformBody(doNode->body, temp, usage, assignList);
-                popScope();
                 if (usage == ExpUsage::Closure) {
+                        popScope();
                         *funcStart = anonFuncStart() + nll(doNode);
                         temp.push_back(indent() + anonFuncEnd());
                         popAnonVarArg();
                         popFunctionScope();
                 } else {
+                        popScope();
                         temp.push_back(indent() + "end"s + nlr(doNode));
                 }
                 out.push_back(join(temp));
@@ -9225,13 +9285,17 @@ private:
                                 default: YUEE("AST node mismatch", name); break;
                         }
                 }
+                bool extraScope = false;
                 if (objAssign) {
                         auto preDef = toLocalDecl(transformAssignDefs(expList, DefOp::Mark));
                         if (!preDef.empty()) {
                                 temp.push_back(preDef + nll(importNode));
                         }
-                        temp.push_back(indent() + "do"s + nll(importNode));
-                        pushScope();
+                        if (!currentScope().lastStatement) {
+                                extraScope = true;
+                                temp.push_back(indent() + "do"s + nll(importNode));
+                                pushScope();
+                        }
                         transformAssignment(objAssign, temp);
                 }
                 auto assignment = x->new_ptr<ExpListAssign_t>();
@@ -9239,8 +9303,10 @@ private:
                 assignment->action.set(assign);
                 transformAssignment(assignment, temp);
                 if (objAssign) {
-                        popScope();
-                        temp.push_back(indent() + "end"s + nlr(importNode));
+                        if (extraScope) {
+                                popScope();
+                                temp.push_back(indent() + "end"s + nlr(importNode));
+                        }
                 }
                 out.push_back(join(temp));
                 auto vars = getAssignVars(assignment);
@@ -9485,9 +9551,13 @@ private:
         void transformWhileInPlace(While_t* whileNode, str_list& out, ExpList_t* expList = nullptr) {
                 auto x = whileNode;
                 str_list temp;
+                bool extraScope = false;
                 if (expList) {
-                        temp.push_back(indent() + "do"s + nll(whileNode));
-                        pushScope();
+                        if (!currentScope().lastStatement) {
+                                extraScope = true;
+                                temp.push_back(indent() + "do"s + nll(whileNode));
+                                pushScope();
+                        }
                 }
                 auto accumVar = getUnusedName("_accum_"sv);
                 addToScope(accumVar);
@@ -9511,11 +9581,11 @@ private:
                         assignment->expList.set(expList);
                         assignment->action.set(assign);
                         transformAssignment(assignment, temp);
-                        popScope();
+                        if (extraScope) popScope();
                 } else {
                         temp.push_back(indent() + "return "s + accumVar + nlr(whileNode));
                 }
-                if (expList) {
+                if (expList && extraScope) {
                         temp.push_back(indent() + "end"s + nlr(whileNode));
                 }
                 out.push_back(join(temp));
@@ -9589,6 +9659,7 @@ private:
         void transformSwitch(Switch_t* switchNode, str_list& out, ExpUsage usage, ExpList_t* assignList = nullptr) {
                 auto x = switchNode;
                 str_list temp;
+                bool needScope = !currentScope().lastStatement;
                 std::string* funcStart = nullptr;
                 if (usage == ExpUsage::Closure) {
                         auto simpleValue = x->new_ptr<SimpleValue_t>();
@@ -9605,9 +9676,11 @@ private:
                 auto objVar = singleVariableFrom(switchNode->target, AccessType::Read);
                 if (objVar.empty() || !isLocal(objVar)) {
                         if (usage == ExpUsage::Common || usage == ExpUsage::Assignment) {
-                                extraScope = true;
-                                temp.push_back(indent() + "do"s + nll(x));
-                                pushScope();
+                                if (needScope) {
+                                        extraScope = true;
+                                        temp.push_back(indent() + "do"s + nll(x));
+                                        pushScope();
+                                }
                         }
                         objVar = getUnusedName("_exp_"sv);
                         auto expList = toAst<ExpList_t>(objVar, x);
@@ -9640,7 +9713,7 @@ private:
                                         addScope++;
                                 }
                                 if (tabCheckVar.empty()) {
-                                        if (!extraScope) {
+                                        if (!extraScope && needScope) {
                                                 temp.push_back(indent() + "do"s + nll(branch));
                                                 pushScope();
                                                 extraScope = true;