fn token(c: u8) bool = {
	return switch (c) {
	case '+' => yield true;
	case '-' => yield true;
	case '<' => yield true;
	case '>' => yield true;
	case '.' => yield true;
	case ',' => yield true;
	case '[' => yield true;
	case ']' => yield true;
	case => yield false;
	};
};