Method is_valid_hex_number

core/string/ustring.cpp:5020–5055

}

bool String::is_valid_hex_number(bool p_with_prefix) const {
	int len = length();

	if (len == 0) {
		return false;
	}

	int from = 0;
	if (len != 1 && (operator[](0) == '+' || operator[](0) == '-')) {
		from++;
	}

	if (p_with_prefix) {
		if (len < 3) {
			return false;
		}
		if (operator[](from) != '0' || operator[](from + 1) != 'x') {
			return false;
		}
		from += 2;
	}

	if (from == len) {
		return false;
	}

	for (int i = from; i < len; i++) {
		char32_t c = operator[](i);
		if (is_hex_digit(c)) {
			continue;
		}
		return false;
	}

	return true;
}

bool String::is_valid_float() const {
	int len = length();