131 lines
3.2 KiB
Lua
131 lines
3.2 KiB
Lua
local files = require 'files'
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local guide = require 'parser.guide'
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local define = require 'proto.define'
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local lang = require 'language'
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local vm = require 'vm.vm'
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local config = require 'config.config'
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local glob = require 'glob'
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local function hasGet(loc)
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if not loc.ref then
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return false
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end
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local weak
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for _, ref in ipairs(loc.ref) do
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if ref.type == 'getlocal' then
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if not ref.next then
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return 'strong'
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end
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local nextType = ref.next.type
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if nextType ~= 'setmethod'
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and nextType ~= 'setfield'
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and nextType ~= 'setindex' then
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return 'strong'
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else
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weak = true
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end
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end
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end
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if weak then
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return 'weak'
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else
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return nil
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end
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end
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local function isMyTable(loc)
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local value = loc.value
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if value and value.type == 'table' then
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return true
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end
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return false
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end
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local function isToBeClosed(source)
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if not source.attrs then
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return false
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end
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for _, attr in ipairs(source.attrs) do
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if attr[1] == 'close' then
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return true
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end
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end
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return false
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end
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local function isDocClass(source)
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if not source.bindDocs then
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return false
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end
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for _, doc in ipairs(source.bindDocs) do
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if doc.type == 'doc.class' then
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return true
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end
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end
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return false
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end
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---@param source parser.object
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local function isDeclareFunctionParam(source)
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if source.parent.type ~= 'funcargs' then
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return false
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end
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local func = source.parent.parent
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return vm.isEmptyFunction(func)
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end
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return function (uri, callback)
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local ast = files.getState(uri)
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if not ast then
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return
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end
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local isMeta = vm.isMetaFile(uri)
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local ignorePatterns = config.get(uri, 'Lua.diagnostics.unusedLocalExclude')
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local ignore = glob.glob(ignorePatterns)
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guide.eachSourceType(ast.ast, 'local', function (source)
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local name = source[1]
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if name == '_'
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or name == ast.ENVMode then
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return
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end
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if ignore(name) then
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return
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end
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if isToBeClosed(source) then
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return
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end
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if isDocClass(source) then
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return
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end
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if isMeta and isDeclareFunctionParam(source) then
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return
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end
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local data = hasGet(source)
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if data == 'strong' then
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return
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end
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if data == 'weak' then
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if not isMyTable(source) then
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return
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end
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end
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callback {
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start = source.start,
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finish = source.finish,
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tags = { define.DiagnosticTag.Unnecessary },
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message = lang.script('DIAG_UNUSED_LOCAL', name),
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}
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if source.ref then
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for _, ref in ipairs(source.ref) do
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callback {
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start = ref.start,
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finish = ref.finish,
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tags = { define.DiagnosticTag.Unnecessary },
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message = lang.script('DIAG_UNUSED_LOCAL', name),
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}
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end
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end
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end)
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end
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