Function isComposedOnlyOfChars

src/utils/string.cpp:732–734

* @brief Returns @c true if @a str is composed solely of chars in @a chars, @c * false otherwise. * * If @a chars is the empty string, it returns @c false. */

* If @a chars is the empty string, it returns @c false.
*/
bool isComposedOnlyOfChars(const std::string &str, const std::string &chars) {
	return str.find_first_not_of(chars) == std::string::npos;
}

/**
* @brief Returns @c true if @a str is composed solely of char @a c, @c false