...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::posix_time::operator>>
// In header: <boost/date_time/posix_time/posix_time_legacy_io.hpp> template<typename charT> std::basic_istream< charT > & operator>>(std::basic_istream< charT > & is, time_period & tp);