Function lowercase

include/dpp/stringops.h:42–47

 * @return std::basic_string<T> lowercased string
 */
template <typename T> std::basic_string<T> lowercase(const std::basic_string<T>& s)
{
	std::basic_string<T> s2 = s;
	std::transform(s2.begin(), s2.end(), s2.begin(), tolower);
	return s2;
}

/**
 * @brief Convert a string to uppercase using toupper()