Struct template wrap

Struct template wrap_if

boost::log::formatters::wrap_if — A convenience class that conditionally wraps the type into a formatter.

Synopsis

// In header: <boost/log/formatters/wrappers.hpp>

template<typename CharT, typename T, typename PredT> 
struct wrap_if : public wrap_if_c< CharT, T, PredT::value > {
};