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local files = require 'files'
local guide = require 'parser.guide'
local vm = require 'vm'
local lang = require 'language'
local define = require 'proto.define'
local await = require 'await'
local function countLibraryArgs(source)
local lib = vm.getLibrary(source, 'simple')
if not lib then
return nil
end
local func = lib.value
local result = 0
if not func.args then
return result
end
if func.args[#func.args].type == '...' then
return math.maxinteger
end
result = result + #func.args
return result
end
local function countCallArgs(source)
local result = 0
if not source.args then
return 0
end
if source.node and source.node.type == 'getmethod' then
result = result + 1
end
result = result + #source.args
return result
end
local function countFuncArgs(source)
local result = 0
if source.parent and source.parent.type == 'setmethod' then
result = result + 1
end
if not source.args then
return result
end
if source.args[#source.args].type == '...' then
return math.maxinteger
end
result = result + #source.args
return result
end
return function (uri, callback)
local ast = files.getAst(uri)
if not ast then
return
end
guide.eachSourceType(ast.ast, 'call', function (source)
local callArgs = countCallArgs(source)
if callArgs == 0 then
return
end
local func = source.node
local funcArgs
local defs = vm.getDefs(func, 'simple')
for _, def in ipairs(defs) do
if def.type == 'function' then
local args = countFuncArgs(def)
if not funcArgs or args > funcArgs then
funcArgs = args
end
end
end
funcArgs = funcArgs or countLibraryArgs(func)
if not funcArgs then
return
end
local delta = callArgs - funcArgs
if delta <= 0 then
return
end
for i = #source.args - delta + 1, #source.args do
local arg = source.args[i]
if arg then
callback {
start = arg.start,
finish = arg.finish,
tags = { define.DiagnosticTag.Unnecessary },
message = lang.script('DIAG_OVER_MAX_ARGS', funcArgs, callArgs)
}
end
end
end)
end
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