5 files changed, 8383 insertions, 0 deletions

diff --git a/makefile b/makefile
index b328dd6..49698fb 100644
--- a/makefile
+++ b/makefile
@@ -289,6 +289,7 @@ test: debug
         @./$(BIN_NAME) $(TEST_INPUT)/try_catch.yue -o $(TEST_OUTPUT)/5.1/try_catch.lua --target=5.1
         @./$(BIN_NAME) $(TEST_INPUT)/attrib.yue -o $(TEST_OUTPUT)/5.1/attrib.lua --target=5.1
         @./$(BIN_NAME) $(TEST_INPUT)/test/loops_spec.yue -o $(TEST_OUTPUT)/5.1/test/loops_spec.lua --target=5.1
+        @./$(BIN_NAME) -e spec/inputs/compile_doc.yue $(TEST_OUTPUT)
         @echo -en "Compile time: "
         @$(END_TIME)
         @./$(BIN_NAME) -e "$$(printf "r = io.popen('git diff --no-index $(TEST_OUTPUT) $(GEN_OUTPUT) | head -5')\\\\read '*a'\nif r ~= ''\n print r\n os.exit 1")"
@@ -307,6 +308,7 @@ gen: release
         @./$(BIN_NAME) $(TEST_INPUT)/try_catch.yue -o $(GEN_OUTPUT)/5.1/try_catch.lua --target=5.1
         @./$(BIN_NAME) $(TEST_INPUT)/attrib.yue -o $(GEN_OUTPUT)/5.1/attrib.lua --target=5.1
         @./$(BIN_NAME) $(TEST_INPUT)/test/loops_spec.yue -o $(GEN_OUTPUT)/5.1/test/loops_spec.lua --target=5.1
+        @./$(BIN_NAME) -e spec/inputs/compile_doc.yue $(GEN_OUTPUT)
         @echo -en "Compile time: "
         @$(END_TIME)
 
diff --git a/spec/inputs/compile_doc.yue b/spec/inputs/compile_doc.yue
new file mode 100644
index 0000000..4ce2b13
--- /dev/null
+++ b/spec/inputs/compile_doc.yue
@@ -0,0 +1,24 @@
+outputFolder = ...
+for [compiledFile, docFile] in *[
+                ["codes_from_doc.lua", "doc/docs/doc/README.md"]
+                ["codes_from_doc_zh.lua", "doc/docs/zh/doc/README.md"]
+        ]
+        close input = with? io.open docFile
+                import "yue" as :to_lua
+                text = \read "*a"
+                codes = []
+                for code in text\gmatch "```moonscript(.-)```"
+                        if result, err = to_lua code, implicit_return_root: false, reserve_line_number: false
+                                codes[] = result
+                        elseif not err\match "macro exporting module only accepts macro definition"
+                                print err
+                                os.exit 1
+                for code in text\gmatch "<pre>(.-)</pre>"
+                        if result, err = to_lua code\gsub("&lt;", "<")\gsub("&gt;", ">"), implicit_return_root: false, reserve_line_number: false
+                                codes[] = result
+                        else
+                                print err
+                                os.exit 1
+                close output = with io.open "#{outputFolder}/#{compiledFile}", "w+"
+                        \write table.concat codes
+
diff --git a/spec/outputs/codes_from_doc.lua b/spec/outputs/codes_from_doc.lua
new file mode 100644
index 0000000..1bcc587
--- /dev/null
+++ b/spec/outputs/codes_from_doc.lua
@@ -0,0 +1,4156 @@
+local _module_0 = { }
+local p, to_lua
+do
+        local _obj_0 = require("yue")
+        p, to_lua = _obj_0.p, _obj_0.to_lua
+end
+local inventory = {
+        equipment = {
+                "sword",
+                "shield"
+        },
+        items = {
+                {
+                        name = "potion",
+                        count = 10
+                },
+                {
+                        name = "bread",
+                        count = 3
+                }
+        }
+}
+print(reduce(filter(map({
+        1,
+        2,
+        3
+}, function(x)
+        return x * 2
+end), function(x)
+        return x > 4
+end), 0, function(a, b)
+        return a + b
+end))
+local apple = setmetatable({
+        size = 15,
+}, {
+        __index = {
+                color = 0x00ffff
+        }
+})
+if (getmetatable(apple) ~= nil) then
+        p(apple.color, getmetatable(apple).__index)
+end
+local _ud83c_udf1b = "月之脚本"
+_module_0["🌛"] = _ud83c_udf1b
+return _module_0
+local area = 6.2831853071796 * 5
+print('hello world')
+assert(item ~= nil)
+local value = item
+if (f1() and f2() and f3()) then
+        print("OK")
+end
+local funcA
+funcA = function() end
+funcA = function()
+        return "assign the Yue defined variable"
+end
+local function funcB() end
+funcB = function()
+        return "assign the Lua defined variable"
+end
+-- raw Lua codes insertion
+if cond then
+  print("output")
+end
+print("yuescript")
+print(3)
+if tb ~= nil then
+        tb:func()
+end
+if tb ~= nil then
+        tb:func()
+end
+print(1 < 2 and 2 <= 2 and 2 < 3 and 3 == 3 and 3 > 2 and 2 >= 1 and 1 == 1 and 1 < 3 and 3 ~= 5)
+local a = 5
+print(1 <= a and a <= 10)
+local v
+v = function(x)
+        print(x)
+        return x
+end
+print((function()
+        local _cond_0 = v(2)
+        if not (v(1) < _cond_0) then
+                return false
+        else
+                return _cond_0 <= v(3)
+        end
+end)())
+print((function()
+        local _cond_0 = v(2)
+        if not (v(1) > _cond_0) then
+                return false
+        else
+                return _cond_0 <= v(3)
+        end
+end)())
+local tab = { }
+tab[#tab + 1] = "Value"
+local parts = {
+        "shoulders",
+        "knees"
+}
+local lyrics
+do
+        local _tab_0 = {
+                "head"
+        }
+        local _idx_0 = 1
+        for _key_0, _value_0 in pairs(parts) 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
+        end
+        _tab_0[#_tab_0 + 1] = "and"
+        _tab_0[#_tab_0 + 1] = "toes"
+        lyrics = _tab_0
+end
+local copy
+do
+        local _tab_0 = { }
+        local _idx_0 = 1
+        for _key_0, _value_0 in pairs(other) 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
+        end
+        copy = _tab_0
+end
+local a = {
+        1,
+        2,
+        3,
+        x = 1
+}
+local b = {
+        4,
+        5,
+        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
+        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
+        merge = _tab_0
+end
+local mt = { }
+local add
+add = function(self, right)
+        return setmetatable({
+                value = self.value + right.value
+        }, mt)
+end
+mt.__add = add
+local a = setmetatable({
+        value = 1
+}, mt)
+local b = setmetatable({
+        value = 2
+}, {
+        __add = add
+})
+local c = setmetatable({
+        value = 3
+}, {
+        __add = mt.__add
+})
+local d = a + b + c
+print(d.value)
+local _ <close> = setmetatable({ }, {
+        __close = function()
+                return print("out of scope")
+        end
+})
+local tb = setmetatable({ }, {
+        ["value"] = 123
+})
+getmetatable(tb).__index = getmetatable(tb)
+print(tb.value)
+setmetatable(tb, {
+        __index = {
+                item = "hello"
+        }
+})
+print(tb.item)
+local item, new, close, getter
+do
+        local _obj_0 = tb
+        item, new = _obj_0[1], _obj_0.new
+        do
+                local _obj_1 = getmetatable(_obj_0)
+                close, getter = _obj_1.__close, _obj_1.__index
+        end
+end
+print(item, new, close, getter)
+do
+        local _obj_0 = func
+        if _obj_0 ~= nil then
+                _obj_0()
+        end
+end
+print((function()
+        local _obj_0 = abc
+        if _obj_0 ~= nil then
+                local _obj_1 = _obj_0["hello world"]
+                if _obj_1 ~= nil then
+                        return _obj_1.xyz
+                end
+                return nil
+        end
+        return nil
+end)())
+local x
+do
+        local _obj_0 = tab
+        if _obj_0 ~= nil then
+                x = _obj_0.value
+        end
+end
+local len = (function()
+        local _obj_0 = utf8
+        if _obj_0 ~= nil then
+                return _obj_0.len
+        end
+        return nil
+end)() or (function()
+        local _obj_0 = string
+        if _obj_0 ~= nil then
+                return _obj_0.len
+        end
+        return nil
+end)() or function(o)
+        return #o
+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
+end
+print("hello")
+print(1, 2)
+print(1, 2, 3)
+print(render(emit(parse(extract(readFile("example.txt"), language, { }), language))))
+local a, b, c, d
+if b ~= nil then
+        a = b
+else
+        if c ~= nil then
+                a = c
+        else
+                a = d
+        end
+end
+func((function()
+        if a ~= nil then
+                return a
+        else
+                return { }
+        end
+end)())
+if a == nil then
+        a = false
+end
+local list = {
+        1,
+        2,
+        3
+}
+func({
+        1,
+        2,
+        3
+})
+local tb = {
+        name = "abc",
+        values = {
+                "a",
+                "b",
+                "c"
+        },
+        objects = {
+                {
+                        name = "a",
+                        value = 1,
+                        func = function(self)
+                                return self.value + 1
+                        end,
+                        tb = {
+                                fieldA = 1
+                        }
+                },
+                {
+                        name = "b",
+                        value = 2,
+                        func = function(self)
+                                return self.value + 2
+                        end,
+                        tb = { }
+                }
+        }
+}
+do
+        local insert, concat = table.insert, table.concat
+        local C, Ct, Cmt
+        do
+                local _obj_0 = require("lpeg")
+                C, Ct, Cmt = _obj_0.C, _obj_0.Ct, _obj_0.Cmt
+        end
+        local x, y, z
+        do
+                local _obj_0 = require('mymodule')
+                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
+end
+do
+        local module = require('module')
+        local module_x = require('module_x')
+        local d_a_s_h_e_s = require("d-a-s-h-e-s")
+        local part = require("module.part")
+end
+do
+        local PlayerModule = require("player")
+        local C, Ct, Cmt
+        do
+                local _obj_0 = require("lpeg")
+                C, Ct, Cmt = _obj_0.C, _obj_0.Ct, _obj_0.Cmt
+        end
+        local one, two, ch
+        do
+                local _obj_0 = require("export")
+                one, two, ch = _obj_0[1], _obj_0[2], _obj_0.Something.umm[1]
+        end
+end
+local _module_0 = { }
+local a, b, c = 1, 2, 3
+_module_0["a"], _module_0["b"], _module_0["c"] = a, b, c
+local cool = "cat"
+_module_0["cool"] = cool
+local What
+if this then
+        What = "abc"
+else
+        What = "def"
+end
+_module_0["What"] = What
+local y
+y = function()
+        local hallo = 3434
+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
+end
+_module_0["Something"] = Something
+return _module_0
+local _module_0 = { }
+local loadstring, tolua
+do
+        local _obj_0 = yue
+        loadstring, tolua = _obj_0.loadstring, _obj_0.to_lua
+end
+_module_0["loadstring"], _module_0["tolua"] = loadstring, tolua
+local fieldA = tb.itemA.fieldA
+if fieldA == nil then
+        fieldA = 'default'
+end
+_module_0["fieldA"] = fieldA
+return _module_0
+local _module_0 = setmetatable({ }, { })
+_module_0.itemA = tb
+getmetatable(_module_0).__index = items
+_module_0["a-b-c"] = 123
+return _module_0
+local _module_0 = { }
+local d, e, f = 3, 2, 1
+_module_0[#_module_0 + 1] = d
+_module_0[#_module_0 + 1] = e
+_module_0[#_module_0 + 1] = f
+if this then
+        _module_0[#_module_0 + 1] = 123
+else
+        _module_0[#_module_0 + 1] = 456
+end
+do
+        local _with_0 = tmp
+        local j = 2000
+        _module_0[#_module_0 + 1] = _with_0
+end
+return _module_0
+local _module_0 = nil
+_module_0 = function()
+        print("hello")
+        return 123
+end
+return _module_0
+local hello = "world"
+local a, b, c = 1, 2, 3
+hello = 123
+local x = 1
+x = x + 1
+x = x - 1
+x = x * 10
+x = x / 10
+x = x % 10
+local s = s .. "world"
+local arg = arg or "default value"
+local a = 0
+local b = 0
+local c = 0
+local d = 0
+local e = 0
+local x = f()
+local y = x
+local z = x
+do
+        local a
+        a = 1
+        local x, y, z
+        print("forward declare all variables as locals")
+        x = function()
+                return 1 + y + z
+        end
+        y, z = 2, 3
+        instance = Item:new()
+end
+do
+        local X
+        X = 1
+        local B
+        print("only forward declare upper case variables")
+        local a = 1
+        B = 2
+end
+do
+        a = 1
+        print("declare all variables as globals")
+        local x
+        x = function()
+                return 1 + y + z
+        end
+        local y, z = 2, 3
+end
+do
+        X = 1
+        print("only declare upper case variables as globals")
+        local a = 1
+        local B = 2
+        local Temp
+        Temp = "a local value"
+end
+local thing = {
+        1,
+        2
+}
+local a, b = thing[1], thing[2]
+print(a, b)
+local obj = {
+        hello = "world",
+        day = "tuesday",
+        length = 20
+}
+local hello, the_day = obj.hello, obj.day
+print(hello, the_day)
+local day = obj.day
+local obj2 = {
+        numbers = {
+                1,
+                2,
+                3,
+                4
+        },
+        properties = {
+                color = "green",
+                height = 13.5
+        }
+}
+local first, second = obj2.numbers[1], obj2.numbers[2]
+print(first, second, color)
+local first, second, color
+do
+        local _obj_0 = obj2
+        first, second, color = _obj_0.numbers[1], _obj_0.numbers[2], _obj_0.properties.color
+end
+local concat, insert
+do
+        local _obj_0 = table
+        concat, insert = _obj_0.concat, _obj_0.insert
+end
+local mix, max, rand
+do
+        local _obj_0 = math
+        mix, max, rand = _obj_0.mix, _obj_0.max, _obj_0.random
+end
+local name, job
+do
+        local _obj_0 = person
+        name, job = _obj_0.name, _obj_0.job
+        if name == nil then
+                name = "nameless"
+        end
+        if job == nil then
+                job = "jobless"
+        end
+end
+local two, four
+do
+        local _obj_0 = items
+        two, four = _obj_0[2], _obj_0[4]
+end
+local tuples = {
+        {
+                "hello",
+                "world"
+        },
+        {
+                "egg",
+                "head"
+        }
+}
+for _index_0 = 1, #tuples do
+        local _des_0 = tuples[_index_0]
+        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
+end
+do
+        local hello = os.getenv("hello")
+        if hello then
+                print("You have hello", hello)
+        else
+                do
+                        local world = os.getenv("world")
+                        if world then
+                                print("you have world", world)
+                        else
+                                print("nothing :(")
+                        end
+                end
+        end
+end
+do
+        local success, result = pcall(function()
+                return "get result without problems"
+        end)
+        if success then
+                print(result)
+        end
+end
+print("OK")
+local list = {
+        1,
+        2,
+        3,
+        4,
+        5
+}
+local fn
+fn = function(ok)
+        return ok, table.unpack(list)
+end
+(function(_arg_0, ...)
+        local ok = _arg_0
+        local count = select('#', ...)
+        local first = select(1, ...)
+        return print(ok, count, first)
+end)(fn(true))
+Rx.Observable.fromRange(1, 8):filter(function(x)
+        return x % 2 == 0
+end):concat(Rx.Observable.of('who do we appreciate')):map(function(value)
+        return value .. '!'
+end):subscribe(print)
+local str = strA .. strB .. strC
+func(3000, "192.168.1.1")
+xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+local success, result = xpcall(func, function(err)
+        return yue.traceback(err)
+end, 1, 2, 3)
+xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+success, result = pcall(func, 1, 2, 3)
+pcall(function()
+        print("trying")
+        return func(1, 2, 3)
+end)
+success, result = xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+if success then
+        print(result)
+end
+local a <const> = 123
+local _ <close> = setmetatable({ }, {
+        __close = function()
+                return print("Out of scope.")
+        end
+})
+local a, b, c, d
+do
+        local _obj_0 = tb
+        a, b, c, d = _obj_0.a, _obj_0.b, _obj_0[1], _obj_0[2]
+end
+local some_string = "Here is a string\n  that has a line break in it."
+print("I am " .. tostring(math.random() * 100) .. "% sure.")
+local integer = 1000000
+local hex = 0xEFBBBF
+local my_function
+my_function = function() end
+my_function()
+local func_a
+func_a = function()
+        return print("hello world")
+end
+local func_b
+func_b = function()
+        local value = 100
+        return print("The value:", value)
+end
+func_a()
+func_b()
+local sum
+sum = function(x, y)
+        return print("sum", x + y)
+end
+sum(10, 20)
+print(sum(10, 20))
+a(b(c("a", "b", "c")))
+print("x:", sum(10, 20), "y:", sum(30, 40))
+local sum
+sum = function(x, y)
+        return x + y
+end
+print("The sum is ", sum(10, 20))
+local sum
+sum = function(x, y)
+        return x + y
+end
+local mystery
+mystery = function(x, y)
+        return x + y, x - y
+end
+local a, b = mystery(10, 20)
+local func
+func = function(self, num)
+        return self.value + num
+end
+local my_function
+my_function = function(name, height)
+        if name == nil then
+                name = "something"
+        end
+        if height == nil then
+                height = 100
+        end
+        print("Hello I am", name)
+        return print("My height is", height)
+end
+local some_args
+some_args = function(x, y)
+        if x == nil then
+                x = 100
+        end
+        if y == nil then
+                y = x + 1000
+        end
+        return print(x + y)
+end
+local a = x - 10
+local b = x - 10
+local c = x(-y)
+local d = x - z
+local x = func("hello") + 100
+local y = func("hello" + 100)
+my_func(5, 4, 3, 8, 9, 10)
+cool_func(1, 2, 3, 4, 5, 6, 7, 8)
+my_func(5, 6, 7, 6, another_func(6, 7, 8, 9, 1, 2), 5, 4)
+local x = {
+        1,
+        2,
+        3,
+        4,
+        a_func(4, 5, 5, 6),
+        8,
+        9,
+        10
+}
+local y = {
+        my_func(1, 2, 3, 4, 5),
+        5,
+        6,
+        7
+}
+if func(1, 2, 3, "hello", "world") then
+        print("hello")
+        print("I am inside if")
+end
+if func(1, 2, 3, "hello", "world") then
+        print("hello")
+        print("I am inside if")
+end
+f(function()
+        return print("hello")
+end)
+f(function(self)
+        return print(self.value)
+end)
+map(function(x)
+        return x * 2
+end, {
+        1,
+        2,
+        3
+})
+local result, msg
+do
+        result, msg = readAsync("filename.txt", function(data)
+                print(data)
+                return processAsync(data, function(info)
+                        return check(info)
+                end)
+        end)
+end
+print(result, msg)
+local some_values = {
+        1,
+        2,
+        3,
+        4
+}
+local some_values = {
+        name = "Bill",
+        age = 200,
+        ["favorite food"] = "rice"
+}
+local profile = {
+        height = "4 feet",
+        shoe_size = 13,
+        favorite_foods = {
+                "ice cream",
+                "donuts"
+        }
+}
+local values = {
+        1,
+        2,
+        3,
+        4,
+        5,
+        6,
+        7,
+        8,
+        name = "superman",
+        occupation = "crime fighting"
+}
+my_function({
+        dance = "Tango",
+        partner = "none"
+})
+local y = {
+        type = "dog",
+        legs = 4,
+        tails = 1
+}
+local tbl = {
+        ["do"] = "something",
+        ["end"] = "hunger"
+}
+local hair = "golden"
+local height = 200
+local person = {
+        hair = hair,
+        height = height,
+        shoe_size = 40
+}
+print_table({
+        hair = hair,
+        height = height
+})
+local t = {
+        [1 + 2] = "hello",
+        ["hello world"] = true
+}
+local some_values = {
+        1,
+        2,
+        3,
+        4
+}
+local list_with_one_element = {
+        1
+}
+local items = {
+        1,
+        2,
+        3,
+        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
+end
+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
+        end
+        slice = _accum_0
+end
+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
+end
+local x_coords = {
+        4,
+        5,
+        6,
+        7
+}
+local y_coords = {
+        9,
+        2,
+        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
+        end
+        points = _accum_0
+end
+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
+        end
+        evens = _accum_0
+end
+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
+end
+local no_color
+do
+        local _tbl_0 = { }
+        for k, v in pairs(thing) do
+                if k ~= "color" then
+                        _tbl_0[k] = v
+                end
+        end
+        no_color = _tbl_0
+end
+local numbers = {
+        1,
+        2,
+        3,
+        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
+end
+local tuples = {
+        {
+                "hello",
+                "world"
+        },
+        {
+                "foo",
+                "bar"
+        }
+}
+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
+end
+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
+end
+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
+end
+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
+end
+for i = 10, 20 do
+        print(i)
+end
+for k = 1, 15, 2 do
+        print(k)
+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
+end
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print(item)
+end
+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
+        end
+        doubled_evens = _accum_0
+end
+local func_a
+func_a = function()
+        for i = 1, 10 do
+                print(i)
+        end
+end
+local func_b
+func_b = function()
+        local _accum_0 = { }
+        local _len_0 = 1
+        for i = 1, 10 do
+                _accum_0[_len_0] = i
+                _len_0 = _len_0 + 1
+        end
+        return _accum_0
+end
+print(func_a())
+print(func_b())
+local i = 10
+repeat
+        print(i)
+        i = i - 1
+until i == 0
+local i = 10
+while i > 0 do
+        print(i)
+        i = i - 1
+end
+while running == true do
+        my_function()
+end
+local i = 10
+while not (i == 0) do
+        print(i)
+        i = i - 1
+end
+while not (running == false) do
+        my_function()
+end
+local i = 0
+while i < 10 do
+        i = i + 1
+        if i % 2 == 0 then
+                goto _continue_0
+        end
+        print(i)
+        ::_continue_0::
+end
+local my_numbers = {
+        1,
+        2,
+        3,
+        4,
+        5,
+        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::
+        end
+        odds = _accum_0
+end
+local have_coins = false
+if have_coins then
+        print("Got coins")
+else
+        print("No coins")
+end
+local have_coins = false
+if have_coins then
+        print("Got coins")
+else
+        print("No coins")
+end
+local have_coins = false
+print((function()
+        if have_coins then
+                return "Got coins"
+        else
+                return "No coins"
+        end
+end)())
+local is_tall
+is_tall = function(name)
+        if name == "Rob" then
+                return true
+        else
+                return false
+        end
+end
+local message
+if is_tall("Rob") then
+        message = "I am very tall"
+else
+        message = "I am not so tall"
+end
+print(message)
+if not (os.date("%A") == "Monday") then
+        print("it is not Monday!")
+end
+if not (math.random() > 0.1) then
+        print("You're lucky!")
+end
+local a = 5
+if (1 == a or 3 == a or 5 == a or 7 == a) then
+        print("checking equality with discrete values")
+end
+if (function()
+        local _check_0 = list
+        for _index_0 = 1, #_check_0 do
+                if _check_0[_index_0] == a then
+                        return true
+                end
+        end
+        return false
+end)() then
+        print("checking if `a` is in a list")
+end
+if not (math.random() > 0.1) then
+        print("You're lucky!")
+end
+if name == "Rob" then
+        print("hello world")
+end
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print("item: ", item)
+end
+while game:isRunning() do
+        game:update()
+end
+while not reader:eof() do
+        reader:parse_line()
+end
+local name = "Dan"
+if "Robert" == name then
+        print("You are Robert")
+elseif "Dan" == name or "Daniel" == name then
+        print("Your name, it's Dan")
+else
+        print("I don't know about your name")
+end
+local b = 1
+local next_number
+if 1 == b then
+        next_number = 2
+elseif 2 == b then
+        next_number = 3
+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
+end
+do
+        local _exp_0 = math.random(1, 5)
+        if 1 == _exp_0 then
+                print("you are lucky")
+        else
+                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
+end
+local items = {
+        {
+                x = 100,
+                y = 200
+        },
+        {
+                width = 300,
+                height = 400
+        }
+}
+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
+                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
+        end
+end
+local item = { }
+local x, y = item.pos.x, item.pos.y
+if x == nil then
+        x = 50
+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
+                end
+                if y == nil then
+                        y = 200
+                end
+                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
+        end
+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
+                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
+end
+local inv = Inventory()
+inv:add_item("t-shirt")
+inv:add_item("pants")
+local Person
+do
+        local _class_0
+        local _base_0 = {
+                clothes = { },
+                give_item = function(self, name)
+                        return table.insert(self.clothes, name)
+                end
+        }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() 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
+local a = Person()
+local b = Person()
+a:give_item("pants")
+b:give_item("shirt")
+local _list_0 = a.clothes
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print(item)
+end
+local Person
+do
+        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
+        })
+        _base_0.__class = _class_0
+        Person = _class_0
+end
+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
+                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 = "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
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        BackPack = _class_0
+end
+local Shelf
+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 = "Shelf"
+        }, {
+                __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.__inherited = function(self, child)
+                return print(self.__name, "was inherited by", child.__name)
+        end
+        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
+                        end
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        Cupboard = _class_0
+end
+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
+                        end
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        MyClass = _class_0
+end
+local b = BackPack()
+assert(b.__class == BackPack)
+print(BackPack.size)
+print(BackPack.__name)
+local Things
+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 = "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.some_func = function(self)
+                return print("Hello from", self.__name)
+        end
+        Things = _class_0
+end
+Things:some_func()
+assert(Things().some_func == nil)
+local Counter
+do
+        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.__class.count = self.__class.count + 1
+                end,
+                __base = _base_0,
+                __name = "Counter"
+        }, {
+                __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.count = 0
+        Counter = _class_0
+end
+Counter()
+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
+        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
+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
+        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)
+        end
+        MoreThings = _class_0
+end
+assert(self == self)
+assert(self.__class == self.__class)
+local some_instance_method
+some_instance_method = function(self, ...)
+        return self.__class(...)
+end
+local Something
+do
+        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
+        })
+        _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
+        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
+local new
+new = function(self, fieldA, fieldB)
+        self.fieldA = fieldA
+        self.fieldB = fieldB
+        return self
+end
+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
+        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
+end
+local BigBucket
+do
+        local _class_0
+        local _parent_0 = Bucket
+        local _base_0 = {
+                add_drop = function(self)
+                        self.drops = self.drops + 10
+                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 = "BigBucket",
+                __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
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        BigBucket = _class_0
+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
+        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
+local MyIndex = {
+        __index = {
+                var = 1
+        }
+}
+local X
+do
+        local _class_0
+        local _base_0 = {
+                func = function(self)
+                        return print(123)
+                end
+        }
+        local _list_0 = {
+                MyIndex
+        }
+        for _index_0 = 1, #_list_0 do
+                local _item_0 = _list_0[_index_0]
+                local _cls_0, _mixin_0 = (_item_0.__base ~= nil), _item_0.__base or _item_0
+                for _key_0, _val_0 in pairs(_mixin_0) do
+                        if _base_0[_key_0] == nil and (not _cls_0 or not _key_0:match("^__")) then
+                                _base_0[_key_0] = _val_0
+                        end
+                end
+        end
+        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
+        })
+        _base_0.__class = _class_0
+        X = _class_0
+end
+local x = X()
+print(x.var)
+local Y
+do
+        local _class_0
+        local _base_0 = { }
+        local _list_0 = {
+                X
+        }
+        for _index_0 = 1, #_list_0 do
+                local _item_0 = _list_0[_index_0]
+                local _cls_0, _mixin_0 = (_item_0.__base ~= nil), _item_0.__base or _item_0
+                for _key_0, _val_0 in pairs(_mixin_0) do
+                        if _base_0[_key_0] == nil and (not _cls_0 or not _key_0:match("^__")) then
+                                _base_0[_key_0] = _val_0
+                        end
+                end
+        end
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "Y"
+        }, {
+                __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
+        Y = _class_0
+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 file
+do
+        local _with_0 = File("favorite_foods.txt")
+        _with_0:set_encoding("utf8")
+        file = _with_0
+end
+local create_person
+create_person = function(name, relatives)
+        local _with_0 = Person()
+        _with_0.name = name
+        for _index_0 = 1, #relatives do
+                local relative = relatives[_index_0]
+                _with_0:add_relative(relative)
+        end
+        return _with_0
+end
+local me = create_person("Leaf", {
+        dad,
+        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
+do
+        local var = "hello"
+        print(var)
+end
+print(var)
+local counter
+do
+        local i = 0
+        counter = function()
+                i = i + 1
+                return i
+        end
+end
+print(counter())
+print(counter())
+local tbl = {
+        key = (function()
+                print("assigning key!")
+                return 1234
+        end)()
+}
+local my_object = {
+        value = 1000,
+        write = function(self)
+                return print("the value:", self.value)
+        end
+}
+local run_callback
+run_callback = function(func)
+        print("running callback...")
+        return func()
+end
+run_callback(my_object.write)
+run_callback((function()
+        local _base_0 = my_object
+        local _fn_0 = _base_0.write
+        return _fn_0 and function(...)
+                return _fn_0(_base_0, ...)
+        end
+end)())
+local i = 100
+local my_func
+my_func = function()
+        i = 10
+        while i > 0 do
+                print(i)
+                i = i - 1
+        end
+end
+my_func()
+print(i)
+local i = 100
+local my_func
+my_func = function()
+        local i = "hello"
+end
+my_func()
+print(i)
+local tmp = 1213
+local i, k = 100, 50
+local my_func
+my_func = function(add)
+        local tmp = tmp + add
+        i = i + tmp
+        k = k + tmp
+end
+my_func(22)
+print(i, k)
+local _module_0 = { }
+local p, to_lua
+do
+        local _obj_0 = require("yue")
+        p, to_lua = _obj_0.p, _obj_0.to_lua
+end
+local inventory = {
+        equipment = {
+                "sword",
+                "shield"
+        },
+        items = {
+                {
+                        name = "potion",
+                        count = 10
+                },
+                {
+                        name = "bread",
+                        count = 3
+                }
+        }
+}
+print(reduce(filter(map({
+        1,
+        2,
+        3
+}, function(x)
+        return x * 2
+end), function(x)
+        return x > 4
+end), 0, function(a, b)
+        return a + b
+end))
+local apple = setmetatable({
+        size = 15,
+}, {
+        __index = {
+                color = 0x00ffff
+        }
+})
+if (getmetatable(apple) ~= nil) then
+        p(apple.color, getmetatable(apple).__index)
+end
+local _ud83c_udf1b = "月之脚本"
+_module_0["🌛"] = _ud83c_udf1b
+return _module_0
+local area = 6.2831853071796 * 5
+print('hello world')
+assert(item ~= nil)
+local value = item
+if (f1() and f2() and f3()) then
+        print("OK")
+end
+local funcA
+funcA = function() end
+funcA = function()
+        return "assign the Yue defined variable"
+end
+local function funcB() end
+funcB = function()
+        return "assign the Lua defined variable"
+end
+-- raw Lua codes insertion
+if cond then
+  print("output")
+end
+print("yuescript")
+print(3)
+if tb ~= nil then
+        tb:func()
+end
+if tb ~= nil then
+        tb:func()
+end
+print(1 < 2 and 2 <= 2 and 2 < 3 and 3 == 3 and 3 > 2 and 2 >= 1 and 1 == 1 and 1 < 3 and 3 ~= 5)
+local a = 5
+print(1 <= a and a <= 10)
+local v
+v = function(x)
+        print(x)
+        return x
+end
+print((function()
+        local _cond_0 = v(2)
+        if not (v(1) < _cond_0) then
+                return false
+        else
+                return _cond_0 <= v(3)
+        end
+end)())
+print((function()
+        local _cond_0 = v(2)
+        if not (v(1) > _cond_0) then
+                return false
+        else
+                return _cond_0 <= v(3)
+        end
+end)())
+local tab = { }
+tab[#tab + 1] = "Value"
+local parts = {
+        "shoulders",
+        "knees"
+}
+local lyrics
+do
+        local _tab_0 = {
+                "head"
+        }
+        local _idx_0 = 1
+        for _key_0, _value_0 in pairs(parts) 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
+        end
+        _tab_0[#_tab_0 + 1] = "and"
+        _tab_0[#_tab_0 + 1] = "toes"
+        lyrics = _tab_0
+end
+local copy
+do
+        local _tab_0 = { }
+        local _idx_0 = 1
+        for _key_0, _value_0 in pairs(other) 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
+        end
+        copy = _tab_0
+end
+local a = {
+        1,
+        2,
+        3,
+        x = 1
+}
+local b = {
+        4,
+        5,
+        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
+        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
+        merge = _tab_0
+end
+local mt = { }
+local add
+add = function(self, right)
+        return setmetatable({
+                value = self.value + right.value
+        }, mt)
+end
+mt.__add = add
+local a = setmetatable({
+        value = 1
+}, mt)
+local b = setmetatable({
+        value = 2
+}, {
+        __add = add
+})
+local c = setmetatable({
+        value = 3
+}, {
+        __add = mt.__add
+})
+local d = a + b + c
+print(d.value)
+local _ <close> = setmetatable({ }, {
+        __close = function()
+                return print("out of scope")
+        end
+})
+local tb = setmetatable({ }, {
+        ["value"] = 123
+})
+getmetatable(tb).__index = getmetatable(tb)
+print(tb.value)
+setmetatable(tb, {
+        __index = {
+                item = "hello"
+        }
+})
+print(tb.item)
+local item, new, close, getter
+do
+        local _obj_0 = tb
+        item, new = _obj_0[1], _obj_0.new
+        do
+                local _obj_1 = getmetatable(_obj_0)
+                close, getter = _obj_1.__close, _obj_1.__index
+        end
+end
+print(item, new, close, getter)
+do
+        local _obj_0 = func
+        if _obj_0 ~= nil then
+                _obj_0()
+        end
+end
+print((function()
+        local _obj_0 = abc
+        if _obj_0 ~= nil then
+                local _obj_1 = _obj_0["hello world"]
+                if _obj_1 ~= nil then
+                        return _obj_1.xyz
+                end
+                return nil
+        end
+        return nil
+end)())
+local x
+do
+        local _obj_0 = tab
+        if _obj_0 ~= nil then
+                x = _obj_0.value
+        end
+end
+local len = (function()
+        local _obj_0 = utf8
+        if _obj_0 ~= nil then
+                return _obj_0.len
+        end
+        return nil
+end)() or (function()
+        local _obj_0 = string
+        if _obj_0 ~= nil then
+                return _obj_0.len
+        end
+        return nil
+end)() or function(o)
+        return #o
+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
+end
+print("hello")
+print(1, 2)
+print(1, 2, 3)
+print(render(emit(parse(extract(readFile("example.txt"), language, { }), language))))
+local a, b, c, d
+if b ~= nil then
+        a = b
+else
+        if c ~= nil then
+                a = c
+        else
+                a = d
+        end
+end
+func((function()
+        if a ~= nil then
+                return a
+        else
+                return { }
+        end
+end)())
+if a == nil then
+        a = false
+end
+local list = {
+        1,
+        2,
+        3
+}
+func({
+        1,
+        2,
+        3
+})
+local tb = {
+        name = "abc",
+        values = {
+                "a",
+                "b",
+                "c"
+        },
+        objects = {
+                {
+                        name = "a",
+                        value = 1,
+                        func = function(self)
+                                return self.value + 1
+                        end,
+                        tb = {
+                                fieldA = 1
+                        }
+                },
+                {
+                        name = "b",
+                        value = 2,
+                        func = function(self)
+                                return self.value + 2
+                        end,
+                        tb = { }
+                }
+        }
+}
+do
+        local insert, concat = table.insert, table.concat
+        local C, Ct, Cmt
+        do
+                local _obj_0 = require("lpeg")
+                C, Ct, Cmt = _obj_0.C, _obj_0.Ct, _obj_0.Cmt
+        end
+        local x, y, z
+        do
+                local _obj_0 = require('mymodule')
+                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
+end
+do
+        local module = require('module')
+        local module_x = require('module_x')
+        local d_a_s_h_e_s = require("d-a-s-h-e-s")
+        local part = require("module.part")
+end
+do
+        local PlayerModule = require("player")
+        local C, Ct, Cmt
+        do
+                local _obj_0 = require("lpeg")
+                C, Ct, Cmt = _obj_0.C, _obj_0.Ct, _obj_0.Cmt
+        end
+        local one, two, ch
+        do
+                local _obj_0 = require("export")
+                one, two, ch = _obj_0[1], _obj_0[2], _obj_0.Something.umm[1]
+        end
+end
+local _module_0 = { }
+local a, b, c = 1, 2, 3
+_module_0["a"], _module_0["b"], _module_0["c"] = a, b, c
+local cool = "cat"
+_module_0["cool"] = cool
+local What
+if this then
+        What = "abc"
+else
+        What = "def"
+end
+_module_0["What"] = What
+local y
+y = function()
+        local hallo = 3434
+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
+end
+_module_0["Something"] = Something
+return _module_0
+local _module_0 = { }
+local loadstring, tolua
+do
+        local _obj_0 = yue
+        loadstring, tolua = _obj_0.loadstring, _obj_0.to_lua
+end
+_module_0["loadstring"], _module_0["tolua"] = loadstring, tolua
+local fieldA = tb.itemA.fieldA
+if fieldA == nil then
+        fieldA = 'default'
+end
+_module_0["fieldA"] = fieldA
+return _module_0
+local _module_0 = setmetatable({ }, { })
+_module_0.itemA = tb
+getmetatable(_module_0).__index = items
+_module_0["a-b-c"] = 123
+return _module_0
+local _module_0 = { }
+local d, e, f = 3, 2, 1
+_module_0[#_module_0 + 1] = d
+_module_0[#_module_0 + 1] = e
+_module_0[#_module_0 + 1] = f
+if this then
+        _module_0[#_module_0 + 1] = 123
+else
+        _module_0[#_module_0 + 1] = 456
+end
+do
+        local _with_0 = tmp
+        local j = 2000
+        _module_0[#_module_0 + 1] = _with_0
+end
+return _module_0
+local _module_0 = nil
+_module_0 = function()
+        print("hello")
+        return 123
+end
+return _module_0
+local hello = "world"
+local a, b, c = 1, 2, 3
+hello = 123
+local x = 1
+x = x + 1
+x = x - 1
+x = x * 10
+x = x / 10
+x = x % 10
+local s = s .. "world"
+local arg = arg or "default value"
+local a = 0
+local b = 0
+local c = 0
+local d = 0
+local e = 0
+local x = f()
+local y = x
+local z = x
+do
+        local a
+        a = 1
+        local x, y, z
+        print("forward declare all variables as locals")
+        x = function()
+                return 1 + y + z
+        end
+        y, z = 2, 3
+        instance = Item:new()
+end
+do
+        local X
+        X = 1
+        local B
+        print("only forward declare upper case variables")
+        local a = 1
+        B = 2
+end
+do
+        a = 1
+        print("declare all variables as globals")
+        local x
+        x = function()
+                return 1 + y + z
+        end
+        local y, z = 2, 3
+end
+do
+        X = 1
+        print("only declare upper case variables as globals")
+        local a = 1
+        local B = 2
+        local Temp
+        Temp = "a local value"
+end
+local thing = {
+        1,
+        2
+}
+local a, b = thing[1], thing[2]
+print(a, b)
+local obj = {
+        hello = "world",
+        day = "tuesday",
+        length = 20
+}
+local hello, the_day = obj.hello, obj.day
+print(hello, the_day)
+local day = obj.day
+local obj2 = {
+        numbers = {
+                1,
+                2,
+                3,
+                4
+        },
+        properties = {
+                color = "green",
+                height = 13.5
+        }
+}
+local first, second = obj2.numbers[1], obj2.numbers[2]
+print(first, second, color)
+local first, second, color
+do
+        local _obj_0 = obj2
+        first, second, color = _obj_0.numbers[1], _obj_0.numbers[2], _obj_0.properties.color
+end
+local concat, insert
+do
+        local _obj_0 = table
+        concat, insert = _obj_0.concat, _obj_0.insert
+end
+local mix, max, rand
+do
+        local _obj_0 = math
+        mix, max, rand = _obj_0.mix, _obj_0.max, _obj_0.random
+end
+local name, job
+do
+        local _obj_0 = person
+        name, job = _obj_0.name, _obj_0.job
+        if name == nil then
+                name = "nameless"
+        end
+        if job == nil then
+                job = "jobless"
+        end
+end
+local two, four
+do
+        local _obj_0 = items
+        two, four = _obj_0[2], _obj_0[4]
+end
+local tuples = {
+        {
+                "hello",
+                "world"
+        },
+        {
+                "egg",
+                "head"
+        }
+}
+for _index_0 = 1, #tuples do
+        local _des_0 = tuples[_index_0]
+        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
+end
+do
+        local hello = os.getenv("hello")
+        if hello then
+                print("You have hello", hello)
+        else
+                do
+                        local world = os.getenv("world")
+                        if world then
+                                print("you have world", world)
+                        else
+                                print("nothing :(")
+                        end
+                end
+        end
+end
+do
+        local success, result = pcall(function()
+                return "get result without problems"
+        end)
+        if success then
+                print(result)
+        end
+end
+print("OK")
+local list = {
+        1,
+        2,
+        3,
+        4,
+        5
+}
+local fn
+fn = function(ok)
+        return ok, table.unpack(list)
+end
+(function(_arg_0, ...)
+        local ok = _arg_0
+        local count = select('#', ...)
+        local first = select(1, ...)
+        return print(ok, count, first)
+end)(fn(true))
+Rx.Observable.fromRange(1, 8):filter(function(x)
+        return x % 2 == 0
+end):concat(Rx.Observable.of('who do we appreciate')):map(function(value)
+        return value .. '!'
+end):subscribe(print)
+local str = strA .. strB .. strC
+func(3000, "192.168.1.1")
+xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+local success, result = xpcall(func, function(err)
+        return yue.traceback(err)
+end, 1, 2, 3)
+xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+success, result = pcall(func, 1, 2, 3)
+pcall(function()
+        print("trying")
+        return func(1, 2, 3)
+end)
+success, result = xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+if success then
+        print(result)
+end
+local a <const> = 123
+local _ <close> = setmetatable({ }, {
+        __close = function()
+                return print("Out of scope.")
+        end
+})
+local a, b, c, d
+do
+        local _obj_0 = tb
+        a, b, c, d = _obj_0.a, _obj_0.b, _obj_0[1], _obj_0[2]
+end
+local some_string = "Here is a string\n  that has a line break in it."
+print("I am " .. tostring(math.random() * 100) .. "% sure.")
+local integer = 1000000
+local hex = 0xEFBBBF
+local my_function
+my_function = function() end
+my_function()
+local func_a
+func_a = function()
+        return print("hello world")
+end
+local func_b
+func_b = function()
+        local value = 100
+        return print("The value:", value)
+end
+func_a()
+func_b()
+local sum
+sum = function(x, y)
+        return print("sum", x + y)
+end
+sum(10, 20)
+print(sum(10, 20))
+a(b(c("a", "b", "c")))
+print("x:", sum(10, 20), "y:", sum(30, 40))
+local sum
+sum = function(x, y)
+        return x + y
+end
+print("The sum is ", sum(10, 20))
+local sum
+sum = function(x, y)
+        return x + y
+end
+local mystery
+mystery = function(x, y)
+        return x + y, x - y
+end
+local a, b = mystery(10, 20)
+local func
+func = function(self, num)
+        return self.value + num
+end
+local my_function
+my_function = function(name, height)
+        if name == nil then
+                name = "something"
+        end
+        if height == nil then
+                height = 100
+        end
+        print("Hello I am", name)
+        return print("My height is", height)
+end
+local some_args
+some_args = function(x, y)
+        if x == nil then
+                x = 100
+        end
+        if y == nil then
+                y = x + 1000
+        end
+        return print(x + y)
+end
+local a = x - 10
+local b = x - 10
+local c = x(-y)
+local d = x - z
+local x = func("hello") + 100
+local y = func("hello" + 100)
+my_func(5, 4, 3, 8, 9, 10)
+cool_func(1, 2, 3, 4, 5, 6, 7, 8)
+my_func(5, 6, 7, 6, another_func(6, 7, 8, 9, 1, 2), 5, 4)
+local x = {
+        1,
+        2,
+        3,
+        4,
+        a_func(4, 5, 5, 6),
+        8,
+        9,
+        10
+}
+local y = {
+        my_func(1, 2, 3, 4, 5),
+        5,
+        6,
+        7
+}
+if func(1, 2, 3, "hello", "world") then
+        print("hello")
+        print("I am inside if")
+end
+if func(1, 2, 3, "hello", "world") then
+        print("hello")
+        print("I am inside if")
+end
+f(function()
+        return print("hello")
+end)
+f(function(self)
+        return print(self.value)
+end)
+map(function(x)
+        return x * 2
+end, {
+        1,
+        2,
+        3
+})
+local result, msg
+do
+        result, msg = readAsync("filename.txt", function(data)
+                print(data)
+                return processAsync(data, function(info)
+                        return check(info)
+                end)
+        end)
+end
+print(result, msg)
+local some_values = {
+        1,
+        2,
+        3,
+        4
+}
+local some_values = {
+        name = "Bill",
+        age = 200,
+        ["favorite food"] = "rice"
+}
+local profile = {
+        height = "4 feet",
+        shoe_size = 13,
+        favorite_foods = {
+                "ice cream",
+                "donuts"
+        }
+}
+local values = {
+        1,
+        2,
+        3,
+        4,
+        5,
+        6,
+        7,
+        8,
+        name = "superman",
+        occupation = "crime fighting"
+}
+my_function({
+        dance = "Tango",
+        partner = "none"
+})
+local y = {
+        type = "dog",
+        legs = 4,
+        tails = 1
+}
+local tbl = {
+        ["do"] = "something",
+        ["end"] = "hunger"
+}
+local hair = "golden"
+local height = 200
+local person = {
+        hair = hair,
+        height = height,
+        shoe_size = 40
+}
+print_table({
+        hair = hair,
+        height = height
+})
+local t = {
+        [1 + 2] = "hello",
+        ["hello world"] = true
+}
+local some_values = {
+        1,
+        2,
+        3,
+        4
+}
+local list_with_one_element = {
+        1
+}
+local items = {
+        1,
+        2,
+        3,
+        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
+end
+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
+        end
+        slice = _accum_0
+end
+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
+end
+local x_coords = {
+        4,
+        5,
+        6,
+        7
+}
+local y_coords = {
+        9,
+        2,
+        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
+        end
+        points = _accum_0
+end
+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
+        end
+        evens = _accum_0
+end
+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
+end
+local no_color
+do
+        local _tbl_0 = { }
+        for k, v in pairs(thing) do
+                if k ~= "color" then
+                        _tbl_0[k] = v
+                end
+        end
+        no_color = _tbl_0
+end
+local numbers = {
+        1,
+        2,
+        3,
+        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
+end
+local tuples = {
+        {
+                "hello",
+                "world"
+        },
+        {
+                "foo",
+                "bar"
+        }
+}
+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
+end
+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
+end
+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
+end
+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
+end
+for i = 10, 20 do
+        print(i)
+end
+for k = 1, 15, 2 do
+        print(k)
+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
+end
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print(item)
+end
+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
+        end
+        doubled_evens = _accum_0
+end
+local func_a
+func_a = function()
+        for i = 1, 10 do
+                print(i)
+        end
+end
+local func_b
+func_b = function()
+        local _accum_0 = { }
+        local _len_0 = 1
+        for i = 1, 10 do
+                _accum_0[_len_0] = i
+                _len_0 = _len_0 + 1
+        end
+        return _accum_0
+end
+print(func_a())
+print(func_b())
+local i = 10
+repeat
+        print(i)
+        i = i - 1
+until i == 0
+local i = 10
+while i > 0 do
+        print(i)
+        i = i - 1
+end
+while running == true do
+        my_function()
+end
+local i = 10
+while not (i == 0) do
+        print(i)
+        i = i - 1
+end
+while not (running == false) do
+        my_function()
+end
+local i = 0
+while i < 10 do
+        i = i + 1
+        if i % 2 == 0 then
+                goto _continue_0
+        end
+        print(i)
+        ::_continue_0::
+end
+local my_numbers = {
+        1,
+        2,
+        3,
+        4,
+        5,
+        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::
+        end
+        odds = _accum_0
+end
+local have_coins = false
+if have_coins then
+        print("Got coins")
+else
+        print("No coins")
+end
+local have_coins = false
+if have_coins then
+        print("Got coins")
+else
+        print("No coins")
+end
+local have_coins = false
+print((function()
+        if have_coins then
+                return "Got coins"
+        else
+                return "No coins"
+        end
+end)())
+local is_tall
+is_tall = function(name)
+        if name == "Rob" then
+                return true
+        else
+                return false
+        end
+end
+local message
+if is_tall("Rob") then
+        message = "I am very tall"
+else
+        message = "I am not so tall"
+end
+print(message)
+if not (os.date("%A") == "Monday") then
+        print("it is not Monday!")
+end
+if not (math.random() > 0.1) then
+        print("You're lucky!")
+end
+local a = 5
+if (1 == a or 3 == a or 5 == a or 7 == a) then
+        print("checking equality with discrete values")
+end
+if (function()
+        local _check_0 = list
+        for _index_0 = 1, #_check_0 do
+                if _check_0[_index_0] == a then
+                        return true
+                end
+        end
+        return false
+end)() then
+        print("checking if `a` is in a list")
+end
+if not (math.random() > 0.1) then
+        print("You're lucky!")
+end
+if name == "Rob" then
+        print("hello world")
+end
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print("item: ", item)
+end
+while game:isRunning() do
+        game:update()
+end
+while not reader:eof() do
+        reader:parse_line()
+end
+local name = "Dan"
+if "Robert" == name then
+        print("You are Robert")
+elseif "Dan" == name or "Daniel" == name then
+        print("Your name, it's Dan")
+else
+        print("I don't know about your name")
+end
+local b = 1
+local next_number
+if 1 == b then
+        next_number = 2
+elseif 2 == b then
+        next_number = 3
+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
+end
+do
+        local _exp_0 = math.random(1, 5)
+        if 1 == _exp_0 then
+                print("you are lucky")
+        else
+                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
+end
+local items = {
+        {
+                x = 100,
+                y = 200
+        },
+        {
+                width = 300,
+                height = 400
+        }
+}
+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
+                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
+        end
+end
+local item = { }
+local x, y = item.pos.x, item.pos.y
+if x == nil then
+        x = 50
+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
+                end
+                if y == nil then
+                        y = 200
+                end
+                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
+        end
+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
+                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
+end
+local inv = Inventory()
+inv:add_item("t-shirt")
+inv:add_item("pants")
+local Person
+do
+        local _class_0
+        local _base_0 = {
+                clothes = { },
+                give_item = function(self, name)
+                        return table.insert(self.clothes, name)
+                end
+        }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() 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
+local a = Person()
+local b = Person()
+a:give_item("pants")
+b:give_item("shirt")
+local _list_0 = a.clothes
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print(item)
+end
+local Person
+do
+        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
+        })
+        _base_0.__class = _class_0
+        Person = _class_0
+end
+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
+                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 = "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
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        BackPack = _class_0
+end
+local Shelf
+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 = "Shelf"
+        }, {
+                __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.__inherited = function(self, child)
+                return print(self.__name, "was inherited by", child.__name)
+        end
+        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
+                        end
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        Cupboard = _class_0
+end
+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
+                        end
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        MyClass = _class_0
+end
+local b = BackPack()
+assert(b.__class == BackPack)
+print(BackPack.size)
+print(BackPack.__name)
+local Things
+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 = "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.some_func = function(self)
+                return print("Hello from", self.__name)
+        end
+        Things = _class_0
+end
+Things:some_func()
+assert(Things().some_func == nil)
+local Counter
+do
+        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.__class.count = self.__class.count + 1
+                end,
+                __base = _base_0,
+                __name = "Counter"
+        }, {
+                __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.count = 0
+        Counter = _class_0
+end
+Counter()
+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
+        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
+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
+        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)
+        end
+        MoreThings = _class_0
+end
+assert(self == self)
+assert(self.__class == self.__class)
+local some_instance_method
+some_instance_method = function(self, ...)
+        return self.__class(...)
+end
+local Something
+do
+        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
+        })
+        _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
+        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
+local new
+new = function(self, fieldA, fieldB)
+        self.fieldA = fieldA
+        self.fieldB = fieldB
+        return self
+end
+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
+        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
+end
+local BigBucket
+do
+        local _class_0
+        local _parent_0 = Bucket
+        local _base_0 = {
+                add_drop = function(self)
+                        self.drops = self.drops + 10
+                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 = "BigBucket",
+                __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
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        BigBucket = _class_0
+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
+        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
+local MyIndex = {
+        __index = {
+                var = 1
+        }
+}
+local X
+do
+        local _class_0
+        local _base_0 = {
+                func = function(self)
+                        return print(123)
+                end
+        }
+        local _list_0 = {
+                MyIndex
+        }
+        for _index_0 = 1, #_list_0 do
+                local _item_0 = _list_0[_index_0]
+                local _cls_0, _mixin_0 = (_item_0.__base ~= nil), _item_0.__base or _item_0
+                for _key_0, _val_0 in pairs(_mixin_0) do
+                        if _base_0[_key_0] == nil and (not _cls_0 or not _key_0:match("^__")) then
+                                _base_0[_key_0] = _val_0
+                        end
+                end
+        end
+        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
+        })
+        _base_0.__class = _class_0
+        X = _class_0
+end
+local x = X()
+print(x.var)
+local Y
+do
+        local _class_0
+        local _base_0 = { }
+        local _list_0 = {
+                X
+        }
+        for _index_0 = 1, #_list_0 do
+                local _item_0 = _list_0[_index_0]
+                local _cls_0, _mixin_0 = (_item_0.__base ~= nil), _item_0.__base or _item_0
+                for _key_0, _val_0 in pairs(_mixin_0) do
+                        if _base_0[_key_0] == nil and (not _cls_0 or not _key_0:match("^__")) then
+                                _base_0[_key_0] = _val_0
+                        end
+                end
+        end
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "Y"
+        }, {
+                __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
+        Y = _class_0
+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 file
+do
+        local _with_0 = File("favorite_foods.txt")
+        _with_0:set_encoding("utf8")
+        file = _with_0
+end
+local create_person
+create_person = function(name, relatives)
+        local _with_0 = Person()
+        _with_0.name = name
+        for _index_0 = 1, #relatives do
+                local relative = relatives[_index_0]
+                _with_0:add_relative(relative)
+        end
+        return _with_0
+end
+local me = create_person("Leaf", {
+        dad,
+        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
+do
+        local var = "hello"
+        print(var)
+end
+print(var)
+local counter
+do
+        local i = 0
+        counter = function()
+                i = i + 1
+                return i
+        end
+end
+print(counter())
+print(counter())
+local tbl = {
+        key = (function()
+                print("assigning key!")
+                return 1234
+        end)()
+}
+local my_object = {
+        value = 1000,
+        write = function(self)
+                return print("the value:", self.value)
+        end
+}
+local run_callback
+run_callback = function(func)
+        print("running callback...")
+        return func()
+end
+run_callback(my_object.write)
+run_callback((function()
+        local _base_0 = my_object
+        local _fn_0 = _base_0.write
+        return _fn_0 and function(...)
+                return _fn_0(_base_0, ...)
+        end
+end)())
+local i = 100
+local my_func
+my_func = function()
+        i = 10
+        while i > 0 do
+                print(i)
+                i = i - 1
+        end
+end
+my_func()
+print(i)
+local i = 100
+local my_func
+my_func = function()
+        local i = "hello"
+end
+my_func()
+print(i)
+local tmp = 1213
+local i, k = 100, 50
+local my_func
+my_func = function(add)
+        local tmp = tmp + add
+        i = i + tmp
+        k = k + tmp
+end
+my_func(22)
+print(i, k)
diff --git a/spec/outputs/codes_from_doc_zh.lua b/spec/outputs/codes_from_doc_zh.lua
new file mode 100644
index 0000000..15647b2
--- /dev/null
+++ b/spec/outputs/codes_from_doc_zh.lua
@@ -0,0 +1,4144 @@
+local _module_0 = { }
+local p, to_lua
+do
+        local _obj_0 = require("yue")
+        p, to_lua = _obj_0.p, _obj_0.to_lua
+end
+local inventory = {
+        equipment = {
+                "sword",
+                "shield"
+        },
+        items = {
+                {
+                        name = "potion",
+                        count = 10
+                },
+                {
+                        name = "bread",
+                        count = 3
+                }
+        }
+}
+print(reduce(filter(map({
+        1,
+        2,
+        3
+}, function(x)
+        return x * 2
+end), function(x)
+        return x > 4
+end), 0, function(a, b)
+        return a + b
+end))
+local apple = setmetatable({
+        size = 15,
+}, {
+        __index = {
+                color = 0x00ffff
+        }
+})
+if (getmetatable(apple) ~= nil) then
+        p(apple.color, getmetatable(apple).__index)
+end
+local _ud83c_udf1b = "月之脚本"
+_module_0["🌛"] = _ud83c_udf1b
+return _module_0
+local area = 6.2831853071796 * 5
+print('你好 世界')
+assert(item ~= nil)
+local value = item
+if (f1() and f2() and f3()) then
+        print("OK")
+end
+local funcA
+funcA = function() end
+funcA = function()
+        return "访问月之脚本定义的变量"
+end
+local function funcB() end
+funcB = function()
+        return "访问Lua代码里定义的变量"
+end
+-- 插入原始Lua代码
+if cond then
+  print("输出")
+end
+print("yuescript")
+print(3)
+if tb ~= nil then
+        tb:func()
+end
+if tb ~= nil then
+        tb:func()
+end
+print(1 < 2 and 2 <= 2 and 2 < 3 and 3 == 3 and 3 > 2 and 2 >= 1 and 1 == 1 and 1 < 3 and 3 ~= 5)
+local a = 5
+print(1 <= a and a <= 10)
+local v
+v = function(x)
+        print(x)
+        return x
+end
+print((function()
+        local _cond_0 = v(2)
+        if not (v(1) < _cond_0) then
+                return false
+        else
+                return _cond_0 <= v(3)
+        end
+end)())
+print((function()
+        local _cond_0 = v(2)
+        if not (v(1) > _cond_0) then
+                return false
+        else
+                return _cond_0 <= v(3)
+        end
+end)())
+local tab = { }
+tab[#tab + 1] = "Value"
+local parts = {
+        "shoulders",
+        "knees"
+}
+local lyrics
+do
+        local _tab_0 = {
+                "head"
+        }
+        local _idx_0 = 1
+        for _key_0, _value_0 in pairs(parts) 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
+        end
+        _tab_0[#_tab_0 + 1] = "and"
+        _tab_0[#_tab_0 + 1] = "toes"
+        lyrics = _tab_0
+end
+local copy
+do
+        local _tab_0 = { }
+        local _idx_0 = 1
+        for _key_0, _value_0 in pairs(other) 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
+        end
+        copy = _tab_0
+end
+local a = {
+        1,
+        2,
+        3,
+        x = 1
+}
+local b = {
+        4,
+        5,
+        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
+        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
+        merge = _tab_0
+end
+local mt = { }
+local add
+add = function(self, right)
+        return setmetatable({
+                value = self.value + right.value
+        }, mt)
+end
+mt.__add = add
+local a = setmetatable({
+        value = 1
+}, mt)
+local b = setmetatable({
+        value = 2
+}, {
+        __add = add
+})
+local c = setmetatable({
+        value = 3
+}, {
+        __add = mt.__add
+})
+local d = a + b + c
+print(d.value)
+local _ <close> = setmetatable({ }, {
+        __close = function()
+                return print("超出范围")
+        end
+})
+local tb = setmetatable({ }, {
+        ["value"] = 123
+})
+getmetatable(tb).__index = getmetatable(tb)
+print(tb.value)
+setmetatable(tb, {
+        __index = {
+                item = "hello"
+        }
+})
+print(tb.item)
+local item, new, close, getter
+do
+        local _obj_0 = tb
+        item, new = _obj_0[1], _obj_0.new
+        do
+                local _obj_1 = getmetatable(_obj_0)
+                close, getter = _obj_1.__close, _obj_1.__index
+        end
+end
+print(item, new, close, getter)
+do
+        local _obj_0 = func
+        if _obj_0 ~= nil then
+                _obj_0()
+        end
+end
+print((function()
+        local _obj_0 = abc
+        if _obj_0 ~= nil then
+                local _obj_1 = _obj_0["你好 世界"]
+                if _obj_1 ~= nil then
+                        return _obj_1.xyz
+                end
+                return nil
+        end
+        return nil
+end)())
+local x
+do
+        local _obj_0 = tab
+        if _obj_0 ~= nil then
+                x = _obj_0.value
+        end
+end
+local len = (function()
+        local _obj_0 = utf8
+        if _obj_0 ~= nil then
+                return _obj_0.len
+        end
+        return nil
+end)() or (function()
+        local _obj_0 = string
+        if _obj_0 ~= nil then
+                return _obj_0.len
+        end
+        return nil
+end)() or function(o)
+        return #o
+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
+end
+print("你好")
+print(1, 2)
+print(1, 2, 3)
+print(render(emit(parse(extract(readFile("example.txt"), language, { }), language))))
+local a, b, c, d
+if b ~= nil then
+        a = b
+else
+        if c ~= nil then
+                a = c
+        else
+                a = d
+        end
+end
+func((function()
+        if a ~= nil then
+                return a
+        else
+                return { }
+        end
+end)())
+if a == nil then
+        a = false
+end
+local list = {
+        1,
+        2,
+        3
+}
+func({
+        1,
+        2,
+        3
+})
+local tb = {
+        name = "abc",
+        values = {
+                "a",
+                "b",
+                "c"
+        },
+        objects = {
+                {
+                        name = "a",
+                        value = 1,
+                        func = function(self)
+                                return self.value + 1
+                        end,
+                        tb = {
+                                fieldA = 1
+                        }
+                },
+                {
+                        name = "b",
+                        value = 2,
+                        func = function(self)
+                                return self.value + 2
+                        end,
+                        tb = { }
+                }
+        }
+}
+do
+        local insert, concat = table.insert, table.concat
+        local C, Ct, Cmt
+        do
+                local _obj_0 = require("lpeg")
+                C, Ct, Cmt = _obj_0.C, _obj_0.Ct, _obj_0.Cmt
+        end
+        local x, y, z
+        do
+                local _obj_0 = require('mymodule')
+                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
+end
+do
+        local module = require('module')
+        local module_x = require('module_x')
+        local d_a_s_h_e_s = require("d-a-s-h-e-s")
+        local part = require("module.part")
+end
+do
+        local PlayerModule = require("player")
+        local C, Ct, Cmt
+        do
+                local _obj_0 = require("lpeg")
+                C, Ct, Cmt = _obj_0.C, _obj_0.Ct, _obj_0.Cmt
+        end
+        local one, two, ch
+        do
+                local _obj_0 = require("export")
+                one, two, ch = _obj_0[1], _obj_0[2], _obj_0.Something.umm[1]
+        end
+end
+local _module_0 = { }
+local a, b, c = 1, 2, 3
+_module_0["a"], _module_0["b"], _module_0["c"] = a, b, c
+local cool = "cat"
+_module_0["cool"] = cool
+local What
+if this then
+        What = "abc"
+else
+        What = "def"
+end
+_module_0["What"] = What
+local y
+y = function()
+        local hallo = 3434
+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
+end
+_module_0["Something"] = Something
+return _module_0
+local _module_0 = { }
+local loadstring, tolua
+do
+        local _obj_0 = yue
+        loadstring, tolua = _obj_0.loadstring, _obj_0.to_lua
+end
+_module_0["loadstring"], _module_0["tolua"] = loadstring, tolua
+local fieldA = tb.itemA.fieldA
+if fieldA == nil then
+        fieldA = '默认值'
+end
+_module_0["fieldA"] = fieldA
+return _module_0
+local _module_0 = setmetatable({ }, { })
+_module_0.itemA = tb
+getmetatable(_module_0).__index = items
+_module_0["a-b-c"] = 123
+return _module_0
+local _module_0 = { }
+local d, e, f = 3, 2, 1
+_module_0[#_module_0 + 1] = d
+_module_0[#_module_0 + 1] = e
+_module_0[#_module_0 + 1] = f
+if this then
+        _module_0[#_module_0 + 1] = 123
+else
+        _module_0[#_module_0 + 1] = 456
+end
+do
+        local _with_0 = tmp
+        local j = 2000
+        _module_0[#_module_0 + 1] = _with_0
+end
+return _module_0
+local _module_0 = nil
+_module_0 = function()
+        print("你好")
+        return 123
+end
+return _module_0
+local hello = "world"
+local a, b, c = 1, 2, 3
+hello = 123
+local x = 1
+x = x + 1
+x = x - 1
+x = x * 10
+x = x / 10
+x = x % 10
+local s = s .. "world"
+local arg = arg or "默认值"
+local a = 0
+local b = 0
+local c = 0
+local d = 0
+local e = 0
+local x = f()
+local y = x
+local z = x
+do
+        local a
+        a = 1
+        local x, y, z
+        print("预先声明后续所有变量为局部变量")
+        x = function()
+                return 1 + y + z
+        end
+        y, z = 2, 3
+        instance = Item:new()
+end
+do
+        local X
+        X = 1
+        local B
+        print("只预先声明后续大写的变量为局部变量")
+        local a = 1
+        B = 2
+end
+do
+        a = 1
+        print("预先声明所有变量为全局变量")
+        local x
+        x = function()
+                return 1 + y + z
+        end
+        local y, z = 2, 3
+end
+do
+        x = 1
+        print("只预先声明大写的变量为全局变量")
+        local a = 1
+        local B = 2
+        local Temp
+        Temp = "一个局部值"
+end
+local thing = {
+        1,
+        2
+}
+local a, b = thing[1], thing[2]
+print(a, b)
+local obj = {
+        hello = "world",
+        day = "tuesday",
+        length = 20
+}
+local hello, the_day = obj.hello, obj.day
+print(hello, the_day)
+local day = obj.day
+local obj2 = {
+        numbers = {
+                1,
+                2,
+                3,
+                4
+        },
+        properties = {
+                color = "green",
+                height = 13.5
+        }
+}
+local first, second = obj2.numbers[1], obj2.numbers[2]
+print(first, second, color)
+local first, second, color
+do
+        local _obj_0 = obj2
+        first, second, color = _obj_0.numbers[1], _obj_0.numbers[2], _obj_0.properties.color
+end
+local concat, insert
+do
+        local _obj_0 = table
+        concat, insert = _obj_0.concat, _obj_0.insert
+end
+local mix, max, rand
+do
+        local _obj_0 = math
+        mix, max, rand = _obj_0.mix, _obj_0.max, _obj_0.random
+end
+local name, job
+do
+        local _obj_0 = person
+        name, job = _obj_0.name, _obj_0.job
+        if name == nil then
+                name = "nameless"
+        end
+        if job == nil then
+                job = "jobless"
+        end
+end
+local two, four
+do
+        local _obj_0 = items
+        two, four = _obj_0[2], _obj_0[4]
+end
+local tuples = {
+        {
+                "hello",
+                "world"
+        },
+        {
+                "egg",
+                "head"
+        }
+}
+for _index_0 = 1, #tuples do
+        local _des_0 = tuples[_index_0]
+        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
+end
+do
+        local hello = os.getenv("hello")
+        if hello then
+                print("你有 hello", hello)
+        else
+                do
+                        local world = os.getenv("world")
+                        if world then
+                                print("你有 world", world)
+                        else
+                                print("什么都没有 :(")
+                        end
+                end
+        end
+end
+do
+        local success, result = pcall(function()
+                return "无报错地获取结果"
+        end)
+        if success then
+                print(result)
+        end
+end
+print("好的")
+local list = {
+        1,
+        2,
+        3,
+        4,
+        5
+}
+local fn
+fn = function(ok)
+        return ok, table.unpack(list)
+end
+(function(_arg_0, ...)
+        local ok = _arg_0
+        local count = select('#', ...)
+        local first = select(1, ...)
+        return print(ok, count, first)
+end)(fn(true))
+Rx.Observable.fromRange(1, 8):filter(function(x)
+        return x % 2 == 0
+end):concat(Rx.Observable.of('who do we appreciate')):map(function(value)
+        return value .. '!'
+end):subscribe(print)
+local str = strA .. strB .. strC
+func(3000, "192.168.1.1")
+xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+local success, result = xpcall(func, function(err)
+        return yue.traceback(err)
+end, 1, 2, 3)
+xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+success, result = pcall(func, 1, 2, 3)
+pcall(function()
+        print("尝试中")
+        return func(1, 2, 3)
+end)
+success, result = xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+if success then
+        print(result)
+end
+local a <const> = 123
+local _ <close> = setmetatable({ }, {
+        __close = function()
+                return print("超出范围。")
+        end
+})
+local a, b, c, d
+do
+        local _obj_0 = tb
+        a, b, c, d = _obj_0.a, _obj_0.b, _obj_0[1], _obj_0[2]
+end
+local some_string = "这是一个字符串\n  并包括一个换行。"
+print("我有" .. tostring(math.random() * 100) .. "%的把握。")
+local integer = 1000000
+local hex = 0xEFBBBF
+local my_function
+my_function = function() end
+my_function()
+local func_a
+func_a = function()
+        return print("你好，世界")
+end
+local func_b
+func_b = function()
+        local value = 100
+        return print("这个值是：", value)
+end
+func_a()
+func_b()
+local sum
+sum = function(x, y)
+        return print("数字的和", x + y)
+end
+sum(10, 20)
+print(sum(10, 20))
+a(b(c("a", "b", "c")))
+print("x:", sum(10, 20), "y:", sum(30, 40))
+local sum
+sum = function(x, y)
+        return x + y
+end
+print("数字的和是", sum(10, 20))
+local sum
+sum = function(x, y)
+        return x + y
+end
+local mystery
+mystery = function(x, y)
+        return x + y, x - y
+end
+local a, b = mystery(10, 20)
+local func
+func = function(self, num)
+        return self.value + num
+end
+local my_function
+my_function = function(name, height)
+        if name == nil then
+                name = "某物"
+        end
+        if height == nil then
+                height = 100
+        end
+        print("你好，我是", name)
+        return print("我的高度是", height)
+end
+local some_args
+some_args = function(x, y)
+        if x == nil then
+                x = 100
+        end
+        if y == nil then
+                y = x + 1000
+        end
+        return print(x + y)
+end
+my_func(5, 4, 3, 8, 9, 10)
+cool_func(1, 2, 3, 4, 5, 6, 7, 8)
+my_func(5, 6, 7, 6, another_func(6, 7, 8, 9, 1, 2), 5, 4)
+local x = {
+        1,
+        2,
+        3,
+        4,
+        a_func(4, 5, 5, 6),
+        8,
+        9,
+        10
+}
+local y = {
+        my_func(1, 2, 3, 4, 5),
+        5,
+        6,
+        7
+}
+if func(1, 2, 3, "你好", "世界") then
+        print("你好")
+        print("我在if内部")
+end
+if func(1, 2, 3, "你好", "世界") then
+        print("hello")
+        print("我在if内部")
+end
+f(function()
+        return print("hello")
+end)
+f(function(self)
+        return print(self.value)
+end)
+map(function(x)
+        return x * 2
+end, {
+        1,
+        2,
+        3
+})
+local result, msg
+do
+        result, msg = readAsync("文件名.txt", function(data)
+                print(data)
+                return processAsync(data, function(info)
+                        return check(info)
+                end)
+        end)
+end
+print(result, msg)
+local some_values = {
+        1,
+        2,
+        3,
+        4
+}
+local some_values = {
+        name = "Bill",
+        age = 200,
+        ["favorite food"] = "rice"
+}
+local profile = {
+        height = "4英尺",
+        shoe_size = 13,
+        favorite_foods = {
+                "冰淇淋",
+                "甜甜圈"
+        }
+}
+local values = {
+        1,
+        2,
+        3,
+        4,
+        5,
+        6,
+        7,
+        8,
+        name = "超人",
+        occupation = "打击犯罪"
+}
+my_function({
+        dance = "探戈",
+        partner = "无"
+})
+local y = {
+        type = "狗",
+        legs = 4,
+        tails = 1
+}
+local tbl = {
+        ["do"] = "某事",
+        ["end"] = "饥饿"
+}
+local hair = "金色"
+local height = 200
+local person = {
+        hair = hair,
+        height = height,
+        shoe_size = 40
+}
+print_table({
+        hair = hair,
+        height = height
+})
+local t = {
+        [1 + 2] = "你好",
+        ["你好 世界"] = true
+}
+local some_values = {
+        1,
+        2,
+        3,
+        4
+}
+local list_with_one_element = {
+        1
+}
+local items = {
+        1,
+        2,
+        3,
+        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
+end
+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
+        end
+        slice = _accum_0
+end
+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
+end
+local x_coords = {
+        4,
+        5,
+        6,
+        7
+}
+local y_coords = {
+        9,
+        2,
+        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
+        end
+        points = _accum_0
+end
+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
+        end
+        evens = _accum_0
+end
+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
+end
+local no_color
+do
+        local _tbl_0 = { }
+        for k, v in pairs(thing) do
+                if k ~= "color" then
+                        _tbl_0[k] = v
+                end
+        end
+        no_color = _tbl_0
+end
+local numbers = {
+        1,
+        2,
+        3,
+        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
+end
+local tuples = {
+        {
+                "hello",
+                "world"
+        },
+        {
+                "foo",
+                "bar"
+        }
+}
+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
+end
+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
+end
+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
+end
+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
+end
+for i = 10, 20 do
+        print(i)
+end
+for k = 1, 15, 2 do
+        print(k)
+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
+end
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print(item)
+end
+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
+        end
+        doubled_evens = _accum_0
+end
+local func_a
+func_a = function()
+        for i = 1, 10 do
+                print(i)
+        end
+end
+local func_b
+func_b = function()
+        local _accum_0 = { }
+        local _len_0 = 1
+        for i = 1, 10 do
+                _accum_0[_len_0] = i
+                _len_0 = _len_0 + 1
+        end
+        return _accum_0
+end
+print(func_a())
+print(func_b())
+local i = 10
+repeat
+        print(i)
+        i = i - 1
+until i == 0
+local i = 10
+while i > 0 do
+        print(i)
+        i = i - 1
+end
+while running == true do
+        my_function()
+end
+local i = 10
+while not (i == 0) do
+        print(i)
+        i = i - 1
+end
+while not (running == false) do
+        my_function()
+end
+local i = 0
+while i < 10 do
+        i = i + 1
+        if i % 2 == 0 then
+                goto _continue_0
+        end
+        print(i)
+        ::_continue_0::
+end
+local my_numbers = {
+        1,
+        2,
+        3,
+        4,
+        5,
+        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::
+        end
+        odds = _accum_0
+end
+local have_coins = false
+if have_coins then
+        print("有硬币")
+else
+        print("没有硬币")
+end
+local have_coins = false
+if have_coins then
+        print("有硬币")
+else
+        print("没有硬币")
+end
+local have_coins = false
+print((function()
+        if have_coins then
+                return "有硬币"
+        else
+                return "没有硬币"
+        end
+end)())
+local is_tall
+is_tall = function(name)
+        if name == "Rob" then
+                return true
+        else
+                return false
+        end
+end
+local message
+if is_tall("Rob") then
+        message = "我很高"
+else
+        message = "我不是很高"
+end
+print(message)
+if not (os.date("%A") == "Monday") then
+        print("今天不是星期一！")
+end
+if not (math.random() > 0.1) then
+        print("你真幸运！")
+end
+local a = 5
+if (1 == a or 3 == a or 5 == a or 7 == a) then
+        print("检查离散值的相等性")
+end
+if (function()
+        local _check_0 = list
+        for _index_0 = 1, #_check_0 do
+                if _check_0[_index_0] == a then
+                        return true
+                end
+        end
+        return false
+end)() then
+        print("检查`a`是否在列表中")
+end
+if not (math.random() > 0.1) then
+        print("你很幸运!")
+end
+if name == "Rob" then
+        print("你好，世界")
+end
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print("项目: ", item)
+end
+while game:isRunning() do
+        game:update()
+end
+while not reader:eof() do
+        reader:parse_line()
+end
+local name = "Dan"
+if "Robert" == name then
+        print("你是Robert")
+elseif "Dan" == name or "Daniel" == name then
+        print("你的名字是Dan")
+else
+        print("我不知道你的名字")
+end
+local b = 1
+local next_number
+if 1 == b then
+        next_number = 2
+elseif 2 == b then
+        next_number = 3
+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
+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
+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
+end
+local items = {
+        {
+                x = 100,
+                y = 200
+        },
+        {
+                width = 300,
+                height = 400
+        }
+}
+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
+                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
+        end
+end
+local item = { }
+local x, y = item.pos.x, item.pos.y
+if x == nil then
+        x = 50
+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
+                end
+                if y == nil then
+                        y = 200
+                end
+                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
+        end
+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
+                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
+end
+local inv = Inventory()
+inv:add_item("t-shirt")
+inv:add_item("pants")
+local Person
+do
+        local _class_0
+        local _base_0 = {
+                clothes = { },
+                give_item = function(self, name)
+                        return table.insert(self.clothes, name)
+                end
+        }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() 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
+local a = Person()
+local b = Person()
+a:give_item("pants")
+b:give_item("shirt")
+local _list_0 = a.clothes
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print(item)
+end
+local Person
+do
+        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
+        })
+        _base_0.__class = _class_0
+        Person = _class_0
+end
+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
+                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 = "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
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        BackPack = _class_0
+end
+local Shelf
+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 = "Shelf"
+        }, {
+                __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.__inherited = function(self, child)
+                return print(self.__name, "被", child.__name, "继承")
+        end
+        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
+                        end
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        Cupboard = _class_0
+end
+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
+                        end
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        MyClass = _class_0
+end
+local b = BackPack()
+assert(b.__class == BackPack)
+print(BackPack.size)
+print(BackPack.__name)
+local Things
+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 = "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.some_func = function(self)
+                return print("Hello from", self.__name)
+        end
+        Things = _class_0
+end
+Things:some_func()
+assert(Things().some_func == nil)
+local Counter
+do
+        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.__class.count = self.__class.count + 1
+                end,
+                __base = _base_0,
+                __name = "Counter"
+        }, {
+                __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.count = 0
+        Counter = _class_0
+end
+Counter()
+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
+        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
+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
+        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)
+        end
+        MoreThings = _class_0
+end
+assert(self == self)
+assert(self.__class == self.__class)
+local some_instance_method
+some_instance_method = function(self, ...)
+        return self.__class(...)
+end
+local Something
+do
+        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
+        })
+        _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
+        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
+local new
+new = function(self, fieldA, fieldB)
+        self.fieldA = fieldA
+        self.fieldB = fieldB
+        return self
+end
+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
+        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
+end
+local BigBucket
+do
+        local _class_0
+        local _parent_0 = Bucket
+        local _base_0 = {
+                add_drop = function(self)
+                        self.drops = self.drops + 10
+                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 = "BigBucket",
+                __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
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        BigBucket = _class_0
+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
+        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
+local MyIndex = {
+        __index = {
+                var = 1
+        }
+}
+local X
+do
+        local _class_0
+        local _base_0 = {
+                func = function(self)
+                        return print(123)
+                end
+        }
+        local _list_0 = {
+                MyIndex
+        }
+        for _index_0 = 1, #_list_0 do
+                local _item_0 = _list_0[_index_0]
+                local _cls_0, _mixin_0 = (_item_0.__base ~= nil), _item_0.__base or _item_0
+                for _key_0, _val_0 in pairs(_mixin_0) do
+                        if _base_0[_key_0] == nil and (not _cls_0 or not _key_0:match("^__")) then
+                                _base_0[_key_0] = _val_0
+                        end
+                end
+        end
+        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
+        })
+        _base_0.__class = _class_0
+        X = _class_0
+end
+local x = X()
+print(x.var)
+local Y
+do
+        local _class_0
+        local _base_0 = { }
+        local _list_0 = {
+                X
+        }
+        for _index_0 = 1, #_list_0 do
+                local _item_0 = _list_0[_index_0]
+                local _cls_0, _mixin_0 = (_item_0.__base ~= nil), _item_0.__base or _item_0
+                for _key_0, _val_0 in pairs(_mixin_0) do
+                        if _base_0[_key_0] == nil and (not _cls_0 or not _key_0:match("^__")) then
+                                _base_0[_key_0] = _val_0
+                        end
+                end
+        end
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "Y"
+        }, {
+                __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
+        Y = _class_0
+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 file
+do
+        local _with_0 = File("favorite_foods.txt")
+        _with_0:set_encoding("utf8")
+        file = _with_0
+end
+local create_person
+create_person = function(name, relatives)
+        local _with_0 = Person()
+        _with_0.name = name
+        for _index_0 = 1, #relatives do
+                local relative = relatives[_index_0]
+                _with_0:add_relative(relative)
+        end
+        return _with_0
+end
+local me = create_person("Leaf", {
+        dad,
+        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
+do
+        local var = "hello"
+        print(var)
+end
+print(var)
+local counter
+do
+        local i = 0
+        counter = function()
+                i = i + 1
+                return i
+        end
+end
+print(counter())
+print(counter())
+local tbl = {
+        key = (function()
+                print("分配键值!")
+                return 1234
+        end)()
+}
+local my_object = {
+        value = 1000,
+        write = function(self)
+                return print("值为:", self.value)
+        end
+}
+local run_callback
+run_callback = function(func)
+        print("运行回调...")
+        return func()
+end
+run_callback(my_object.write)
+run_callback((function()
+        local _base_0 = my_object
+        local _fn_0 = _base_0.write
+        return _fn_0 and function(...)
+                return _fn_0(_base_0, ...)
+        end
+end)())
+local i = 100
+local my_func
+my_func = function()
+        i = 10
+        while i > 0 do
+                print(i)
+                i = i - 1
+        end
+end
+my_func()
+print(i)
+local i = 100
+local my_func
+my_func = function()
+        local i = "hello"
+end
+my_func()
+print(i)
+local tmp = 1213
+local i, k = 100, 50
+local my_func
+my_func = function(add)
+        local tmp = tmp + add
+        i = i + tmp
+        k = k + tmp
+end
+my_func(22)
+print(i, k)
+local _module_0 = { }
+local p, to_lua
+do
+        local _obj_0 = require("yue")
+        p, to_lua = _obj_0.p, _obj_0.to_lua
+end
+local inventory = {
+        equipment = {
+                "sword",
+                "shield"
+        },
+        items = {
+                {
+                        name = "potion",
+                        count = 10
+                },
+                {
+                        name = "bread",
+                        count = 3
+                }
+        }
+}
+print(reduce(filter(map({
+        1,
+        2,
+        3
+}, function(x)
+        return x * 2
+end), function(x)
+        return x > 4
+end), 0, function(a, b)
+        return a + b
+end))
+local apple = setmetatable({
+        size = 15,
+}, {
+        __index = {
+                color = 0x00ffff
+        }
+})
+if (getmetatable(apple) ~= nil) then
+        p(apple.color, getmetatable(apple).__index)
+end
+local _ud83c_udf1b = "月之脚本"
+_module_0["🌛"] = _ud83c_udf1b
+return _module_0
+local area = 6.2831853071796 * 5
+print('你好 世界')
+assert(item ~= nil)
+local value = item
+if (f1() and f2() and f3()) then
+        print("OK")
+end
+local funcA
+funcA = function() end
+funcA = function()
+        return "访问月之脚本定义的变量"
+end
+local function funcB() end
+funcB = function()
+        return "访问Lua代码里定义的变量"
+end
+-- 插入原始Lua代码
+if cond then
+  print("输出")
+end
+print("yuescript")
+print(3)
+if tb ~= nil then
+        tb:func()
+end
+if tb ~= nil then
+        tb:func()
+end
+print(1 < 2 and 2 <= 2 and 2 < 3 and 3 == 3 and 3 > 2 and 2 >= 1 and 1 == 1 and 1 < 3 and 3 ~= 5)
+local a = 5
+print(1 <= a and a <= 10)
+local v
+v = function(x)
+        print(x)
+        return x
+end
+print((function()
+        local _cond_0 = v(2)
+        if not (v(1) < _cond_0) then
+                return false
+        else
+                return _cond_0 <= v(3)
+        end
+end)())
+print((function()
+        local _cond_0 = v(2)
+        if not (v(1) > _cond_0) then
+                return false
+        else
+                return _cond_0 <= v(3)
+        end
+end)())
+local tab = { }
+tab[#tab + 1] = "Value"
+local parts = {
+        "shoulders",
+        "knees"
+}
+local lyrics
+do
+        local _tab_0 = {
+                "head"
+        }
+        local _idx_0 = 1
+        for _key_0, _value_0 in pairs(parts) 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
+        end
+        _tab_0[#_tab_0 + 1] = "and"
+        _tab_0[#_tab_0 + 1] = "toes"
+        lyrics = _tab_0
+end
+local copy
+do
+        local _tab_0 = { }
+        local _idx_0 = 1
+        for _key_0, _value_0 in pairs(other) 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
+        end
+        copy = _tab_0
+end
+local a = {
+        1,
+        2,
+        3,
+        x = 1
+}
+local b = {
+        4,
+        5,
+        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
+        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
+        merge = _tab_0
+end
+local mt = { }
+local add
+add = function(self, right)
+        return setmetatable({
+                value = self.value + right.value
+        }, mt)
+end
+mt.__add = add
+local a = setmetatable({
+        value = 1
+}, mt)
+local b = setmetatable({
+        value = 2
+}, {
+        __add = add
+})
+local c = setmetatable({
+        value = 3
+}, {
+        __add = mt.__add
+})
+local d = a + b + c
+print(d.value)
+local _ <close> = setmetatable({ }, {
+        __close = function()
+                return print("超出范围")
+        end
+})
+local tb = setmetatable({ }, {
+        ["value"] = 123
+})
+getmetatable(tb).__index = getmetatable(tb)
+print(tb.value)
+setmetatable(tb, {
+        __index = {
+                item = "hello"
+        }
+})
+print(tb.item)
+local item, new, close, getter
+do
+        local _obj_0 = tb
+        item, new = _obj_0[1], _obj_0.new
+        do
+                local _obj_1 = getmetatable(_obj_0)
+                close, getter = _obj_1.__close, _obj_1.__index
+        end
+end
+print(item, new, close, getter)
+do
+        local _obj_0 = func
+        if _obj_0 ~= nil then
+                _obj_0()
+        end
+end
+print((function()
+        local _obj_0 = abc
+        if _obj_0 ~= nil then
+                local _obj_1 = _obj_0["你好 世界"]
+                if _obj_1 ~= nil then
+                        return _obj_1.xyz
+                end
+                return nil
+        end
+        return nil
+end)())
+local x
+do
+        local _obj_0 = tab
+        if _obj_0 ~= nil then
+                x = _obj_0.value
+        end
+end
+local len = (function()
+        local _obj_0 = utf8
+        if _obj_0 ~= nil then
+                return _obj_0.len
+        end
+        return nil
+end)() or (function()
+        local _obj_0 = string
+        if _obj_0 ~= nil then
+                return _obj_0.len
+        end
+        return nil
+end)() or function(o)
+        return #o
+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
+end
+print("你好")
+print(1, 2)
+print(1, 2, 3)
+print(render(emit(parse(extract(readFile("example.txt"), language, { }), language))))
+local a, b, c, d
+if b ~= nil then
+        a = b
+else
+        if c ~= nil then
+                a = c
+        else
+                a = d
+        end
+end
+func((function()
+        if a ~= nil then
+                return a
+        else
+                return { }
+        end
+end)())
+if a == nil then
+        a = false
+end
+local list = {
+        1,
+        2,
+        3
+}
+func({
+        1,
+        2,
+        3
+})
+local tb = {
+        name = "abc",
+        values = {
+                "a",
+                "b",
+                "c"
+        },
+        objects = {
+                {
+                        name = "a",
+                        value = 1,
+                        func = function(self)
+                                return self.value + 1
+                        end,
+                        tb = {
+                                fieldA = 1
+                        }
+                },
+                {
+                        name = "b",
+                        value = 2,
+                        func = function(self)
+                                return self.value + 2
+                        end,
+                        tb = { }
+                }
+        }
+}
+do
+        local insert, concat = table.insert, table.concat
+        local C, Ct, Cmt
+        do
+                local _obj_0 = require("lpeg")
+                C, Ct, Cmt = _obj_0.C, _obj_0.Ct, _obj_0.Cmt
+        end
+        local x, y, z
+        do
+                local _obj_0 = require('mymodule')
+                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
+end
+do
+        local module = require('module')
+        local module_x = require('module_x')
+        local d_a_s_h_e_s = require("d-a-s-h-e-s")
+        local part = require("module.part")
+end
+do
+        local PlayerModule = require("player")
+        local C, Ct, Cmt
+        do
+                local _obj_0 = require("lpeg")
+                C, Ct, Cmt = _obj_0.C, _obj_0.Ct, _obj_0.Cmt
+        end
+        local one, two, ch
+        do
+                local _obj_0 = require("export")
+                one, two, ch = _obj_0[1], _obj_0[2], _obj_0.Something.umm[1]
+        end
+end
+local _module_0 = { }
+local a, b, c = 1, 2, 3
+_module_0["a"], _module_0["b"], _module_0["c"] = a, b, c
+local cool = "cat"
+_module_0["cool"] = cool
+local What
+if this then
+        What = "abc"
+else
+        What = "def"
+end
+_module_0["What"] = What
+local y
+y = function()
+        local hallo = 3434
+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
+end
+_module_0["Something"] = Something
+return _module_0
+local _module_0 = { }
+local loadstring, tolua
+do
+        local _obj_0 = yue
+        loadstring, tolua = _obj_0.loadstring, _obj_0.to_lua
+end
+_module_0["loadstring"], _module_0["tolua"] = loadstring, tolua
+local fieldA = tb.itemA.fieldA
+if fieldA == nil then
+        fieldA = '默认值'
+end
+_module_0["fieldA"] = fieldA
+return _module_0
+local _module_0 = setmetatable({ }, { })
+_module_0.itemA = tb
+getmetatable(_module_0).__index = items
+_module_0["a-b-c"] = 123
+return _module_0
+local _module_0 = { }
+local d, e, f = 3, 2, 1
+_module_0[#_module_0 + 1] = d
+_module_0[#_module_0 + 1] = e
+_module_0[#_module_0 + 1] = f
+if this then
+        _module_0[#_module_0 + 1] = 123
+else
+        _module_0[#_module_0 + 1] = 456
+end
+do
+        local _with_0 = tmp
+        local j = 2000
+        _module_0[#_module_0 + 1] = _with_0
+end
+return _module_0
+local _module_0 = nil
+_module_0 = function()
+        print("你好")
+        return 123
+end
+return _module_0
+local hello = "world"
+local a, b, c = 1, 2, 3
+hello = 123
+local x = 1
+x = x + 1
+x = x - 1
+x = x * 10
+x = x / 10
+x = x % 10
+local s = s .. "world"
+local arg = arg or "默认值"
+local a = 0
+local b = 0
+local c = 0
+local d = 0
+local e = 0
+local x = f()
+local y = x
+local z = x
+do
+        local a
+        a = 1
+        local x, y, z
+        print("预先声明后续所有变量为局部变量")
+        x = function()
+                return 1 + y + z
+        end
+        y, z = 2, 3
+        instance = Item:new()
+end
+do
+        local X
+        X = 1
+        local B
+        print("只预先声明后续大写的变量为局部变量")
+        local a = 1
+        B = 2
+end
+do
+        a = 1
+        print("预先声明所有变量为全局变量")
+        local x
+        x = function()
+                return 1 + y + z
+        end
+        local y, z = 2, 3
+end
+do
+        x = 1
+        print("只预先声明大写的变量为全局变量")
+        local a = 1
+        local B = 2
+        local Temp
+        Temp = "一个局部值"
+end
+local thing = {
+        1,
+        2
+}
+local a, b = thing[1], thing[2]
+print(a, b)
+local obj = {
+        hello = "world",
+        day = "tuesday",
+        length = 20
+}
+local hello, the_day = obj.hello, obj.day
+print(hello, the_day)
+local day = obj.day
+local obj2 = {
+        numbers = {
+                1,
+                2,
+                3,
+                4
+        },
+        properties = {
+                color = "green",
+                height = 13.5
+        }
+}
+local first, second = obj2.numbers[1], obj2.numbers[2]
+print(first, second, color)
+local first, second, color
+do
+        local _obj_0 = obj2
+        first, second, color = _obj_0.numbers[1], _obj_0.numbers[2], _obj_0.properties.color
+end
+local concat, insert
+do
+        local _obj_0 = table
+        concat, insert = _obj_0.concat, _obj_0.insert
+end
+local mix, max, rand
+do
+        local _obj_0 = math
+        mix, max, rand = _obj_0.mix, _obj_0.max, _obj_0.random
+end
+local name, job
+do
+        local _obj_0 = person
+        name, job = _obj_0.name, _obj_0.job
+        if name == nil then
+                name = "nameless"
+        end
+        if job == nil then
+                job = "jobless"
+        end
+end
+local two, four
+do
+        local _obj_0 = items
+        two, four = _obj_0[2], _obj_0[4]
+end
+local tuples = {
+        {
+                "hello",
+                "world"
+        },
+        {
+                "egg",
+                "head"
+        }
+}
+for _index_0 = 1, #tuples do
+        local _des_0 = tuples[_index_0]
+        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
+end
+do
+        local hello = os.getenv("hello")
+        if hello then
+                print("你有 hello", hello)
+        else
+                do
+                        local world = os.getenv("world")
+                        if world then
+                                print("你有 world", world)
+                        else
+                                print("什么都没有 :(")
+                        end
+                end
+        end
+end
+do
+        local success, result = pcall(function()
+                return "无报错地获取结果"
+        end)
+        if success then
+                print(result)
+        end
+end
+print("好的")
+local list = {
+        1,
+        2,
+        3,
+        4,
+        5
+}
+local fn
+fn = function(ok)
+        return ok, table.unpack(list)
+end
+(function(_arg_0, ...)
+        local ok = _arg_0
+        local count = select('#', ...)
+        local first = select(1, ...)
+        return print(ok, count, first)
+end)(fn(true))
+Rx.Observable.fromRange(1, 8):filter(function(x)
+        return x % 2 == 0
+end):concat(Rx.Observable.of('who do we appreciate')):map(function(value)
+        return value .. '!'
+end):subscribe(print)
+local str = strA .. strB .. strC
+func(3000, "192.168.1.1")
+xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+local success, result = xpcall(func, function(err)
+        return yue.traceback(err)
+end, 1, 2, 3)
+xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+success, result = pcall(func, 1, 2, 3)
+pcall(function()
+        print("尝试中")
+        return func(1, 2, 3)
+end)
+success, result = xpcall(func, function(err)
+        return print(yue.traceback(err))
+end, 1, 2, 3)
+if success then
+        print(result)
+end
+local a <const> = 123
+local _ <close> = setmetatable({ }, {
+        __close = function()
+                return print("超出范围。")
+        end
+})
+local a, b, c, d
+do
+        local _obj_0 = tb
+        a, b, c, d = _obj_0.a, _obj_0.b, _obj_0[1], _obj_0[2]
+end
+local some_string = "这是一个字符串\n  并包括一个换行。"
+print("我有" .. tostring(math.random() * 100) .. "%的把握。")
+local integer = 1000000
+local hex = 0xEFBBBF
+local my_function
+my_function = function() end
+my_function()
+local func_a
+func_a = function()
+        return print("你好，世界")
+end
+local func_b
+func_b = function()
+        local value = 100
+        return print("这个值是：", value)
+end
+func_a()
+func_b()
+local sum
+sum = function(x, y)
+        return print("数字的和", x + y)
+end
+sum(10, 20)
+print(sum(10, 20))
+a(b(c("a", "b", "c")))
+print("x:", sum(10, 20), "y:", sum(30, 40))
+local sum
+sum = function(x, y)
+        return x + y
+end
+print("数字的和是", sum(10, 20))
+local sum
+sum = function(x, y)
+        return x + y
+end
+local mystery
+mystery = function(x, y)
+        return x + y, x - y
+end
+local a, b = mystery(10, 20)
+local func
+func = function(self, num)
+        return self.value + num
+end
+local my_function
+my_function = function(name, height)
+        if name == nil then
+                name = "某物"
+        end
+        if height == nil then
+                height = 100
+        end
+        print("你好，我是", name)
+        return print("我的高度是", height)
+end
+local some_args
+some_args = function(x, y)
+        if x == nil then
+                x = 100
+        end
+        if y == nil then
+                y = x + 1000
+        end
+        return print(x + y)
+end
+my_func(5, 4, 3, 8, 9, 10)
+cool_func(1, 2, 3, 4, 5, 6, 7, 8)
+my_func(5, 6, 7, 6, another_func(6, 7, 8, 9, 1, 2), 5, 4)
+local x = {
+        1,
+        2,
+        3,
+        4,
+        a_func(4, 5, 5, 6),
+        8,
+        9,
+        10
+}
+local y = {
+        my_func(1, 2, 3, 4, 5),
+        5,
+        6,
+        7
+}
+if func(1, 2, 3, "你好", "世界") then
+        print("你好")
+        print("我在if内部")
+end
+if func(1, 2, 3, "你好", "世界") then
+        print("你好")
+        print("我在if内部")
+end
+f(function()
+        return print("hello")
+end)
+f(function(self)
+        return print(self.value)
+end)
+map(function(x)
+        return x * 2
+end, {
+        1,
+        2,
+        3
+})
+local result, msg
+do
+        result, msg = readAsync("文件名.txt", function(data)
+                print(data)
+                return processAsync(data, function(info)
+                        return check(info)
+                end)
+        end)
+end
+print(result, msg)
+local some_values = {
+        1,
+        2,
+        3,
+        4
+}
+local some_values = {
+        name = "Bill",
+        age = 200,
+        ["favorite food"] = "rice"
+}
+local profile = {
+        height = "4英尺",
+        shoe_size = 13,
+        favorite_foods = {
+                "冰淇淋",
+                "甜甜圈"
+        }
+}
+local values = {
+        1,
+        2,
+        3,
+        4,
+        5,
+        6,
+        7,
+        8,
+        name = "超人",
+        occupation = "打击犯罪"
+}
+my_function({
+        dance = "探戈",
+        partner = "无"
+})
+local y = {
+        type = "狗",
+        legs = 4,
+        tails = 1
+}
+local tbl = {
+        ["do"] = "某事",
+        ["end"] = "饥饿"
+}
+local hair = "金色"
+local height = 200
+local person = {
+        hair = hair,
+        height = height,
+        shoe_size = 40
+}
+print_table({
+        hair = hair,
+        height = height
+})
+local t = {
+        [1 + 2] = "你好",
+        ["你好 世界"] = true
+}
+local some_values = {
+        1,
+        2,
+        3,
+        4
+}
+local list_with_one_element = {
+        1
+}
+local items = {
+        1,
+        2,
+        3,
+        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
+end
+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
+        end
+        slice = _accum_0
+end
+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
+end
+local x_coords = {
+        4,
+        5,
+        6,
+        7
+}
+local y_coords = {
+        9,
+        2,
+        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
+        end
+        points = _accum_0
+end
+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
+        end
+        evens = _accum_0
+end
+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
+end
+local no_color
+do
+        local _tbl_0 = { }
+        for k, v in pairs(thing) do
+                if k ~= "color" then
+                        _tbl_0[k] = v
+                end
+        end
+        no_color = _tbl_0
+end
+local numbers = {
+        1,
+        2,
+        3,
+        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
+end
+local tuples = {
+        {
+                "hello",
+                "world"
+        },
+        {
+                "foo",
+                "bar"
+        }
+}
+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
+end
+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
+end
+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
+end
+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
+end
+for i = 10, 20 do
+        print(i)
+end
+for k = 1, 15, 2 do
+        print(k)
+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
+end
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print(item)
+end
+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
+        end
+        doubled_evens = _accum_0
+end
+local func_a
+func_a = function()
+        for i = 1, 10 do
+                print(i)
+        end
+end
+local func_b
+func_b = function()
+        local _accum_0 = { }
+        local _len_0 = 1
+        for i = 1, 10 do
+                _accum_0[_len_0] = i
+                _len_0 = _len_0 + 1
+        end
+        return _accum_0
+end
+print(func_a())
+print(func_b())
+local i = 10
+repeat
+        print(i)
+        i = i - 1
+until i == 0
+local i = 10
+while i > 0 do
+        print(i)
+        i = i - 1
+end
+while running == true do
+        my_function()
+end
+local i = 10
+while not (i == 0) do
+        print(i)
+        i = i - 1
+end
+while not (running == false) do
+        my_function()
+end
+local i = 0
+while i < 10 do
+        i = i + 1
+        if i % 2 == 0 then
+                goto _continue_0
+        end
+        print(i)
+        ::_continue_0::
+end
+local my_numbers = {
+        1,
+        2,
+        3,
+        4,
+        5,
+        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::
+        end
+        odds = _accum_0
+end
+local have_coins = false
+if have_coins then
+        print("有硬币")
+else
+        print("没有硬币")
+end
+local have_coins = false
+if have_coins then
+        print("有硬币")
+else
+        print("没有硬币")
+end
+local have_coins = false
+print((function()
+        if have_coins then
+                return "有硬币"
+        else
+                return "没有硬币"
+        end
+end)())
+local is_tall
+is_tall = function(name)
+        if name == "Rob" then
+                return true
+        else
+                return false
+        end
+end
+local message
+if is_tall("Rob") then
+        message = "我很高"
+else
+        message = "我不是很高"
+end
+print(message)
+if not (os.date("%A") == "Monday") then
+        print("今天不是星期一！")
+end
+if not (math.random() > 0.1) then
+        print("你真幸运！")
+end
+local a = 5
+if (1 == a or 3 == a or 5 == a or 7 == a) then
+        print("检查离散值的相等性")
+end
+if (function()
+        local _check_0 = list
+        for _index_0 = 1, #_check_0 do
+                if _check_0[_index_0] == a then
+                        return true
+                end
+        end
+        return false
+end)() then
+        print("检查`a`是否在列表中")
+end
+if not (math.random() > 0.1) then
+        print("你很幸运!")
+end
+if name == "Rob" then
+        print("你好，世界")
+end
+local _list_0 = items
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print("项目: ", item)
+end
+while game:isRunning() do
+        game:update()
+end
+while not reader:eof() do
+        reader:parse_line()
+end
+local name = "Dan"
+if "Robert" == name then
+        print("你是Robert")
+elseif "Dan" == name or "Daniel" == name then
+        print("你的名字是Dan")
+else
+        print("我不知道你的名字")
+end
+local b = 1
+local next_number
+if 1 == b then
+        next_number = 2
+elseif 2 == b then
+        next_number = 3
+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
+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
+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
+end
+local items = {
+        {
+                x = 100,
+                y = 200
+        },
+        {
+                width = 300,
+                height = 400
+        }
+}
+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
+                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
+        end
+end
+local item = { }
+local x, y = item.pos.x, item.pos.y
+if x == nil then
+        x = 50
+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
+                end
+                if y == nil then
+                        y = 200
+                end
+                print("Vec2 " .. tostring(x) .. ", " .. tostring(y))
+        end
+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
+                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
+end
+local inv = Inventory()
+inv:add_item("t-shirt")
+inv:add_item("pants")
+local Person
+do
+        local _class_0
+        local _base_0 = {
+                clothes = { },
+                give_item = function(self, name)
+                        return table.insert(self.clothes, name)
+                end
+        }
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() 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
+local a = Person()
+local b = Person()
+a:give_item("pants")
+b:give_item("shirt")
+local _list_0 = a.clothes
+for _index_0 = 1, #_list_0 do
+        local item = _list_0[_index_0]
+        print(item)
+end
+local Person
+do
+        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
+        })
+        _base_0.__class = _class_0
+        Person = _class_0
+end
+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
+                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 = "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
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        BackPack = _class_0
+end
+local Shelf
+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 = "Shelf"
+        }, {
+                __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.__inherited = function(self, child)
+                return print(self.__name, "被", child.__name, "继承")
+        end
+        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
+                        end
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        Cupboard = _class_0
+end
+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
+                        end
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        MyClass = _class_0
+end
+local b = BackPack()
+assert(b.__class == BackPack)
+print(BackPack.size)
+print(BackPack.__name)
+local Things
+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 = "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.some_func = function(self)
+                return print("Hello from", self.__name)
+        end
+        Things = _class_0
+end
+Things:some_func()
+assert(Things().some_func == nil)
+local Counter
+do
+        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.__class.count = self.__class.count + 1
+                end,
+                __base = _base_0,
+                __name = "Counter"
+        }, {
+                __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.count = 0
+        Counter = _class_0
+end
+Counter()
+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
+        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
+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
+        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)
+        end
+        MoreThings = _class_0
+end
+assert(self == self)
+assert(self.__class == self.__class)
+local some_instance_method
+some_instance_method = function(self, ...)
+        return self.__class(...)
+end
+local Something
+do
+        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
+        })
+        _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
+        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
+local new
+new = function(self, fieldA, fieldB)
+        self.fieldA = fieldA
+        self.fieldB = fieldB
+        return self
+end
+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
+        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
+end
+local BigBucket
+do
+        local _class_0
+        local _parent_0 = Bucket
+        local _base_0 = {
+                add_drop = function(self)
+                        self.drops = self.drops + 10
+                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 = "BigBucket",
+                __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
+                end,
+                __call = function(cls, ...)
+                        local _self_0 = setmetatable({ }, _base_0)
+                        cls.__init(_self_0, ...)
+                        return _self_0
+                end
+        })
+        _base_0.__class = _class_0
+        if _parent_0.__inherited then
+                _parent_0.__inherited(_parent_0, _class_0)
+        end
+        BigBucket = _class_0
+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
+        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
+local MyIndex = {
+        __index = {
+                var = 1
+        }
+}
+local X
+do
+        local _class_0
+        local _base_0 = {
+                func = function(self)
+                        return print(123)
+                end
+        }
+        local _list_0 = {
+                MyIndex
+        }
+        for _index_0 = 1, #_list_0 do
+                local _item_0 = _list_0[_index_0]
+                local _cls_0, _mixin_0 = (_item_0.__base ~= nil), _item_0.__base or _item_0
+                for _key_0, _val_0 in pairs(_mixin_0) do
+                        if _base_0[_key_0] == nil and (not _cls_0 or not _key_0:match("^__")) then
+                                _base_0[_key_0] = _val_0
+                        end
+                end
+        end
+        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
+        })
+        _base_0.__class = _class_0
+        X = _class_0
+end
+local x = X()
+print(x.var)
+local Y
+do
+        local _class_0
+        local _base_0 = { }
+        local _list_0 = {
+                X
+        }
+        for _index_0 = 1, #_list_0 do
+                local _item_0 = _list_0[_index_0]
+                local _cls_0, _mixin_0 = (_item_0.__base ~= nil), _item_0.__base or _item_0
+                for _key_0, _val_0 in pairs(_mixin_0) do
+                        if _base_0[_key_0] == nil and (not _cls_0 or not _key_0:match("^__")) then
+                                _base_0[_key_0] = _val_0
+                        end
+                end
+        end
+        if _base_0.__index == nil then
+                _base_0.__index = _base_0
+        end
+        _class_0 = setmetatable({
+                __init = function() end,
+                __base = _base_0,
+                __name = "Y"
+        }, {
+                __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
+        Y = _class_0
+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 file
+do
+        local _with_0 = File("favorite_foods.txt")
+        _with_0:set_encoding("utf8")
+        file = _with_0
+end
+local create_person
+create_person = function(name, relatives)
+        local _with_0 = Person()
+        _with_0.name = name
+        for _index_0 = 1, #relatives do
+                local relative = relatives[_index_0]
+                _with_0:add_relative(relative)
+        end
+        return _with_0
+end
+local me = create_person("Leaf", {
+        dad,
+        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
+do
+        local var = "hello"
+        print(var)
+end
+print(var)
+local counter
+do
+        local i = 0
+        counter = function()
+                i = i + 1
+                return i
+        end
+end
+print(counter())
+print(counter())
+local tbl = {
+        key = (function()
+                print("分配键值!")
+                return 1234
+        end)()
+}
+local my_object = {
+        value = 1000,
+        write = function(self)
+                return print("值为:", self.value)
+        end
+}
+local run_callback
+run_callback = function(func)
+        print("运行回调...")
+        return func()
+end
+run_callback(my_object.write)
+run_callback((function()
+        local _base_0 = my_object
+        local _fn_0 = _base_0.write
+        return _fn_0 and function(...)
+                return _fn_0(_base_0, ...)
+        end
+end)())
+local i = 100
+local my_func
+my_func = function()
+        i = 10
+        while i > 0 do
+                print(i)
+                i = i - 1
+        end
+end
+my_func()
+print(i)
+local i = 100
+local my_func
+my_func = function()
+        local i = "hello"
+end
+my_func()
+print(i)
+local tmp = 1213
+local i, k = 100, 50
+local my_func
+my_func = function(add)
+        local tmp = tmp + add
+        i = i + tmp
+        k = k + tmp
+end
+my_func(22)
+print(i, k)
diff --git a/spec/outputs/compile_doc.lua b/spec/outputs/compile_doc.lua
new file mode 100644
index 0000000..7597cb8
--- /dev/null
+++ b/spec/outputs/compile_doc.lua
@@ -0,0 +1,57 @@
+local outputFolder = ...
+local _list_0 = {
+        {
+                "codes_from_doc.lua",
+                "doc/docs/doc/README.md"
+        },
+        {
+                "codes_from_doc_zh.lua",
+                "doc/docs/zh/doc/README.md"
+        }
+}
+for _index_0 = 1, #_list_0 do
+        local _des_0 = _list_0[_index_0]
+        local compiledFile, docFile = _des_0[1], _des_0[2]
+        local input <close> = (function()
+                local _with_0 = io.open(docFile)
+                if _with_0 ~= nil then
+                        local to_lua = require("yue").to_lua
+                        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
+                                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
+                                end
+                        end
+                        local output <close> = (function()
+                                local _with_1 = io.open(tostring(outputFolder) .. "/" .. tostring(compiledFile), "w+")
+                                _with_1:write(table.concat(codes))
+                                return _with_1
+                        end)()
+                end
+                return _with_0
+        end)()
+end