Modern C++ Programming Cookbook

How to do it...

1. To convert a string to lowercase or uppercase, apply the tolower() or toupper() functions on the characters of a string using the general purpose algorithm std::transform():

        template<typename CharT>         inline tstring<CharT> to_upper(tstring<CharT> text)         {           std::transform(std::begin(text), std::end(text),                          std::begin(text), toupper);           return text;         }         template<typename CharT>         inline tstring<CharT> to_lower(tstring<CharT> text)         {           std::transform(std::begin(text), std::end(text),                           std::begin(text), tolower);           return text;         }

2. To reverse a string, use the general purpose algorithm std::reverse():

        template<typename CharT>         inline tstring<CharT> reverse(tstring<CharT> text)         {  std::reverse(std::begin(text), std::end(text)); ...