remove redundant 'do' blocks in code generation.

1 files changed, 1048 insertions, 1202 deletions

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变量"
 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("有硬币")
@@ -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 = "你很幸运"
-        elseif 2 == _exp_0 then
-                msg = "你差点很幸运"
-        else
-                msg = "不太幸运"
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        msg = "你很幸运"
+elseif 2 == _exp_0 then
+        msg = "你差点很幸运"
+else
+        msg = "不太幸运"
 end
 do
         local _exp_0 = math.random(1, 5)
@@ -1240,13 +1197,11 @@ do
                 print("不太幸运")
         end
 end
-do
-        local _exp_0 = math.random(1, 5)
-        if 1 == _exp_0 then
-                print("你很幸运")
-        else
-                print("不太幸运")
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        print("你很幸运")
+else
+        print("不太幸运")
 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变量"
 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("有硬币")
@@ -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 = "你很幸运"
-        elseif 2 == _exp_0 then
-                msg = "你差点很幸运"
-        else
-                msg = "不太幸运"
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        msg = "你很幸运"
+elseif 2 == _exp_0 then
+        msg = "你差点很幸运"
+else
+        msg = "不太幸运"
 end
 do
         local _exp_0 = math.random(1, 5)
@@ -3312,13 +3192,11 @@ do
                 print("不太幸运")
         end
 end
-do
-        local _exp_0 = math.random(1, 5)
-        if 1 == _exp_0 then
-                print("你很幸运")
-        else
-                print("不太幸运")
-        end
+local _exp_0 = math.random(1, 5)
+if 1 == _exp_0 then
+        print("你很幸运")
+else
+        print("不太幸运")
 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)