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boost::log::formatters::fmt_wrapper<CharT, reference_wrapper< T >> — Specialization to put objects into streams by reference.
// In header: <boost/log/formatters/wrappers.hpp> template<typename CharT, typename T> class fmt_wrapper<CharT, reference_wrapper< T >> : public basic_formatter< CharT, fmt_wrapper< CharT, reference_wrapper< T > > > { public: // types typedef base_type::ostream_type ostream_type; // Stream type. typedef base_type::record_type record_type; // Log record type. // public member functions fmt_wrapper(reference_wrapper< T > const &); void operator()(ostream_type &, record_type const &) const; };
The specialization allows to put into the formatting stream external (with regard to the formatter) objects.
fmt_wrapper public member functionsfmt_wrapper(reference_wrapper< T > const & obj);
Constructor
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void operator()(ostream_type & strm, record_type const &) const;
Formatting operator. Puts the referenced object into the strm stream.
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