Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Regex Types Used With MFC Strings

The following typedefs are provided for the convenience of those working with TCHAR's:

typedef basic_regex<TCHAR>                  tregex;
typedef match_results<TCHAR const*>         tmatch;
typedef regex_iterator<TCHAR const*>        tregex_iterator;
typedef regex_token_iterator<TCHAR const*>  tregex_token_iterator;

If you are working with explicitly narrow or wide characters rather than TCHAR, then use the regular Boost.Regex types regex and wregex instead.