Method is_valid_float

core/string/ustring.cpp:5057–5095

}

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

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

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

	bool exponent_found = false;
	bool period_found = false;
	bool sign_found = false;
	bool exponent_values_found = false;
	bool numbers_found = false;

	for (int i = from; i < len; i++) {
		const char32_t c = operator[](i);
		if (is_digit(c)) {
			if (exponent_found) {
				exponent_values_found = true;
			} else {
				numbers_found = true;
			}
		} else if (numbers_found && !exponent_found && (c == 'e' || c == 'E')) {
			exponent_found = true;
		} else if (!period_found && !exponent_found && c == '.') {
			period_found = true;
		} else if ((c == '-' || c == '+') && exponent_found && !exponent_values_found && !sign_found) {
			sign_found = true;
		} else {
			return false; // no start with number plz
		}
	}

	return numbers_found;
}

String String::path_to_file(const String &p_path) const {
	// Don't get base dir for src, this is expected to be a dir already.