Function hasOnlyDecimalDigits

src/utils/string.cpp:227–230

* @brief Returns @c true if the given string is formed only by decimal digits. * * The empty string is considered to be composed only by digits. */

* The empty string is considered to be composed only by digits.
*/
bool hasOnlyDecimalDigits(const std::string &str) {
	return std::all_of(str.begin(), str.end(),
		[](const unsigned char c) { return std::isdigit(c); });
}

/**
* @brief Returns @c true if the given string is formed only by hexadecimal