...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::log::operator<<
// In header: <boost/log/utility/manipulators/tuple.hpp> template<typename StreamT, typename TupleT, typename DelimiterT> unspecified operator<<(StreamT & strm, tuple_manipulator< TupleT, DelimiterT > const & manip);
Stream output operator for
. Outputs every element of the sequence, separated with a delimiter, if one was specified on manipulator construction. tuple_manipulator