boost/algorithm/minmax.hpp
// (C) Copyright Herve Bronnimann 2004. // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) /* Revision history: 1 July 2004 Split the code into two headers to lessen dependence on Boost.tuple. (Herve) 26 June 2004 Added the code for the boost minmax library. (Herve) */ #ifndef BOOST_ALGORITHM_MINMAX_HPP #define BOOST_ALGORITHM_MINMAX_HPP /* PROPOSED STANDARD EXTENSIONS: * * minmax(a, b) * Effect: (b<a) ? std::make_pair(b,a) : std::make_pair(a,b); * * minmax(a, b, comp) * Effect: comp(b,a) ? std::make_pair(b,a) : std::make_pair(a,b); * */ #include <boost/config.hpp> #include <boost/tuple/tuple.hpp> // for using pairs with boost::cref #include <boost/ref.hpp> namespace boost { template <typename T> tuple< T const&, T const& > minmax(T const& a, T const& b) { return (b<a) ? make_tuple(cref(b),cref(a)) : make_tuple(cref(a),cref(b)); } template <typename T, class BinaryPredicate> tuple< T const&, T const& > minmax(T const& a, T const& b, BinaryPredicate comp) { return comp(b,a) ? make_tuple(cref(b),cref(a)) : make_tuple(cref(a),cref(b)); } } // namespace boost #endif // BOOST_ALGORITHM_MINMAX_HPP