[boost] [spirit2] How to get encoding-specific parsers by character type

I was wondering if it was possible to get encoding-specific parsers by character type? Something like that: template< typename CharT > struct encoding_specific { ... }; typedef encoding_specific< char > narrow; narrow::char_; // equivalent to spirit::standard::char_ typedef encoding_specific< wchar_t > wide; wide::char_; // equivalent to spirit::standard_wide::char_ This would help a lot in generic programming, when the character type is not known. Is there a tool like that already? If not, could it be added?