// specialization for type bool inline void argument_value_usage( format_stream& fs, int, bool* = 0 ) { fs << BOOST_RT_PARAM_CSTRING_LITERAL( "[yes|y|no|n]" ); }
inline void argument_value_usage( format_stream& fs, long, T* = 0 ) { fs << BOOST_RT_PARAM_CSTRING_LITERAL( "<value>" ); }
inline void argument_value_usage( format_stream& fs, int, std::list<T>* = 0 ) { fs << BOOST_RT_PARAM_CSTRING_LITERAL( "(<value1>, ..., <valueN>)" ); }