Function OptString

auxiliary.go:327–332

OptString returns the string at index if it is a string. If this argument is absent or is nil, returns def. Otherwise, raises an error.

(l *State, index int, def string)

// OptString returns the string at index if it is a string. If this argument is
// absent or is nil, returns def. Otherwise, raises an error.
func OptString(l *State, index int, def string) string {
	if l.IsNoneOrNil(index) {
		return def
	}
	return CheckString(l, index)
}

func CheckNumber(l *State, index int) float64 {
	n, ok := l.ToNumber(index)