type builtinId int

const (
	// universe scope
	_Append builtinId = iota
	_Cap
	_Clear
	_Close
	_Complex
	_Copy
	_Delete
	_Imag
	_Len
	_Make
	_Max
	_Min
	_New
	_Panic
	_Print
	_Println
	_Real
	_Recover

	// package unsafe
	_Add
	_Alignof
	_Offsetof
	_Sizeof
	_Slice
	_SliceData
	_String

type builtinId int

const (
	// universe scope
	_Append builtinId = iota
	_Cap
	_Clear
	_Close
	_Complex
	_Copy
	_Delete
	_Imag
	_Len
	_Make
	_Max
	_Min
	_New
	_Panic
	_Print
	_Println
	_Real
	_Recover

	// package unsafe
	_Add
	_Alignof
	_Offsetof
	_Sizeof
	_Slice
	_SliceData
	_String

	var args []*operand // not valid for _Make, _New, _Offsetof, _Trace
	var nargs int
	switch id {
	default:
		// check all arguments
		args = check.exprList(argList)
		nargs = len(args)
		for _, a := range args {
			if a.mode == invalid {
				return
			}
		}
		// first argument is always in x
		if nargs > 0 {
			*x = *args[0]
		}
	case _Make, _New, _Offsetof, _Trace:

	var args []*operand // not valid for _Make, _New, _Offsetof, _Trace
	var nargs int
	switch id {
	default:
		// check all arguments
		args = check.exprList(argList)
		nargs = len(args)
		for _, a := range args {
			if a.mode == invalid {
				return
			}
		}
		// first argument is always in x
		if nargs > 0 {
			*x = *args[0]
		}
	case _Make, _New, _Offsetof, _Trace: