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local files = require 'files'
local guide = require 'parser.guide'
local vm = require 'vm'
local define = require 'proto.define'
local lang = require 'language'
local await = require 'await'
local function isToBeClosed(source)
if not source.attrs then
return false
end
for _, attr in ipairs(source.attrs) do
if attr[1] == 'close' then
return true
end
end
return false
end
return function (uri, callback)
local ast = files.getAst(uri)
if not ast then
return
end
-- 只检查局部函数
guide.eachSourceType(ast.ast, 'function', function (source)
local parent = source.parent
if not parent then
return
end
if parent.type ~= 'local'
and parent.type ~= 'setlocal' then
return
end
if isToBeClosed(source) then
return
end
local hasGet
local refs = vm.getRefs(source)
for _, src in ipairs(refs) do
if vm.isGet(src) then
hasGet = true
break
end
end
if not hasGet then
callback {
start = source.start,
finish = source.finish,
tags = { define.DiagnosticTag.Unnecessary },
message = lang.script.DIAG_UNUSED_FUNCTION,
}
end
end)
end
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