[Boost-users] Changing case with regex_format

The following useful Perl expressions seem to have been omitted from regex_format: \l lowercase next char \u uppercase next char \L lowercase till \E \U uppercase till \E \E end case modification Was there a good reason for that? The only way I can see to implement those expressions is to take a copy of regex_format.hpp, then hack _reg_format_aux. I think that it would also be necessary to change the undocumented regex_traits class, to do upper case conversion, as it only seems to do lower casing at present. Is there an easier way? Thanks, Keith MacDonald