...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::algorithm::copy_if — Copies all the elements from the input range that satisfy the predicate to the output range.
// In header: <boost/algorithm/cxx11/copy_if.hpp> template<typename Range, typename OutputIterator, typename Predicate> BOOST_CXX14_CONSTEXPR OutputIterator copy_if(const Range & r, OutputIterator result, Predicate p);