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local vm = require 'vm.vm'
local guide = require 'parser.guide'
local files = require 'files'
local function checkPath(source, info)
if source.type == 'goto' then
return true
end
local src = info.source
local mode = guide.getPath(source, src)
if not mode then
return true
end
if mode == 'before' then
return false
end
return true
end
function vm.eachDef(source, callback)
local results = {}
local valueUris = {}
local sourceUri = guide.getRoot(source).uri
vm.eachRef(source, function (info)
if info.mode == 'declare'
or info.mode == 'set'
or info.mode == 'return'
or info.mode == 'value'
or info.mode == 'library' then
results[#results+1] = info
local src = info.source
if info.mode == 'return' then
local uri = guide.getRoot(src).uri
valueUris[uri] = info.source
end
end
end)
local res
for _, info in ipairs(results) do
local src = info.source
local destUri = guide.getRoot(src).uri
-- 如果是library，则直接放行
if src.library then
res = callback(info)
goto CONTINUE
end
-- 如果是global或field，则直接放行（因为无法确定顺序）
if src.type == 'setindex'
or src.type == 'setfield'
or src.type == 'setmethod'
or src.type == 'tablefield'
or src.type == 'tableindex'
or src.type == 'setglobal' then
res = callback(info)
goto CONTINUE
end
-- 如果是同一个文件，则检查位置关系后放行
if sourceUri == destUri then
if checkPath(source, info) then
res = callback(info)
end
goto CONTINUE
end
-- 如果不是同一个文件，则必须在该文件 return 后才放行
if valueUris[destUri] then
res = callback(info)
goto CONTINUE
end
::CONTINUE::
if res ~= nil then
return res
end
end
end
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