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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 client = require 'client'
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
---@async
return function (uri, callback)
local ast = files.getState(uri)
if not ast then
return
end
local cache = {}
---@async
local function checkFunction(source)
if cache[source] ~= nil then
return cache[source]
end
cache[source] = false
local parent = source.parent
if not parent then
return false
end
if parent.type ~= 'local'
and parent.type ~= 'setlocal' then
return false
end
if isToBeClosed(parent) then
return false
end
await.delay()
if parent.type == 'setlocal' then
parent = parent.node
end
local refs = parent.ref
local hasGet
if refs then
for _, src in ipairs(refs) do
if guide.isGet(src) then
local func = guide.getParentFunction(src)
if not checkFunction(func) then
hasGet = true
break
end
end
end
end
if not hasGet then
if client.isVSCode() then
callback {
start = source.start,
finish = source.finish,
tags = { define.DiagnosticTag.Unnecessary },
message = lang.script.DIAG_UNUSED_FUNCTION,
}
else
callback {
start = source.keyword[1],
finish = source.keyword[2],
tags = { define.DiagnosticTag.Unnecessary },
message = lang.script.DIAG_UNUSED_FUNCTION,
}
end
cache[source] = true
return true
end
return false
end
-- 只检查局部函数
guide.eachSourceType(ast.ast, 'function', function (source) ---@async
checkFunction(source)
end)
end
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