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local createDots = require 'vm.dots'
local createMulti = require 'vm.multi'
local createValue = require 'vm.value'
local createLocal = require 'vm.local'
local mt = {}
mt.__index = mt
mt.type = 'function'
mt._runed = 0
mt._top = 0
function mt:getUri()
return self.source.uri
end
function mt:push()
self._top = self._top + 1
self.locals[self._top] = {}
end
function mt:pop()
self._top = self._top - 1
end
function mt:saveLocal(name, loc)
self.locals[self._top][name] = loc
end
function mt:loadLocal(name)
for i = self._top, 1, -1 do
local locals = self.locals[i]
local loc = locals[name]
if loc then
return loc
end
end
return nil
end
function mt:eachLocal(callback)
local mark = {}
for i = self._top, 1, -1 do
local locals = self.locals[i]
for name, loc in pairs(locals) do
if not mark[name] then
mark[name] = true
local res = callback(name, loc)
if res ~= nil then
return res
end
end
end
end
return nil
end
function mt:saveLabel(label)
if not self._label then
self._label = {}
end
self._label[#self._label+1] = label
end
function mt:loadLabel(name)
if not self._label then
return nil
end
for _, label in ipairs(self._label) do
if label:getName() == name then
return label
end
end
return nil
end
function mt:setReturn(index, value)
self.hasReturn = true
if not self.returns then
self.returns = createMulti()
end
if value then
self.returns[index] = value
else
self.returns[index] = createValue('any', self.source)
end
end
function mt:getReturn(index)
if self.maxReturns and index and self.maxReturns < index then
return createValue('nil')
end
if not self.returns then
self.returns = createMulti()
end
if index then
return self.returns:get(index)
else
return self.returns
end
end
function mt:returnDots(index)
if not self.returns then
self.returns = {}
end
self.returns[index] = createDots()
end
function mt:loadDots(expect)
if not self._dots then
self._dots = createDots()
end
return self._dots:get(expect)
end
function mt:setObject(object)
self._object = object
end
function mt:setColon(colon)
self._colon = colon
end
function mt:hasRuned()
return self._runed > 0
end
function mt:run()
self._runed = self._runed + 1
if not self.source then
return
end
-- 第一次运行函数时，创建函数的参数
if self._runed ~= 1 then
return
end
-- 如果是面向对象形式的函数，创建隐藏的参数self
if self._object then
self:saveLocal('self', self._object)
end
-- 显性声明的参数
self:createArgs()
--local index = 0
--if func.object then
-- local var = self:createArg('self', func.colon, self:getValue--(func.object, func.colon))
-- var.hide = true
-- var.link = func.object
-- if func.argValues[1] then
-- self:setValue(var, func.argValues[1])
-- end
-- index = 1
-- func.args[index] = var
--end
--local stop
--self:forList(func.built.arg, function (arg)
-- if stop then
-- return
-- end
-- index = index + 1
-- if arg.type == 'name' then
-- local var = self:createArg(arg[1], arg)
-- self:setValue(var, func.argValues[index] or self:createValue--('nil'))
-- func.args[index] = var
-- elseif arg.type == '...' then
-- local dots = self:createDots(index, arg)
-- for i = index, #func.argValues do
-- dots[#dots+1] = func.argValues[i]
-- end
-- func.hasDots = true
-- stop = true
-- end
--end)
end
function mt:setArgs(values)
if not self.argValues then
self.argValues = {}
end
for i = 1, #values do
self.argValues[i] = values[i]
end
if self.dots then
local dotsIndex = #self.args
for i = dotsIndex, #values do
self.dots:set(i - dotsIndex + 1, values[i])
end
end
end
function mt:createArg(arg)
if arg.type == 'name' then
local loc = createLocal(arg[1], arg, createValue('any', arg))
self:saveLocal(arg[1], loc)
elseif arg.type == '...' then
end
end
function mt:createArgs()
if not self.source then
return
end
local args = self.source.arg
if not args then
return
end
if args.type == 'list' then
for _, arg in ipairs(args) do
self:createArg(arg)
end
else
self:createArg(args)
end
end
return function (source)
local self = setmetatable({
source = source,
locals = {},
}, mt)
self:push()
return self
end
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