1 // (C) Copyright Herve Bronnimann 2004. 2 // 3 // Distributed under the Boost Software License, Version 1.0. (See accompanying 4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 5 6 /* 7 Revision history: 8 1 July 2004 9 Split the code into two headers to lessen dependence on 10 Boost.tuple. (Herve) 11 26 June 2004 12 Added the code for the boost minmax library. (Herve) 13 */ 14 15 #ifndef BOOST_ALGORITHM_MINMAX_HPP 16 #define BOOST_ALGORITHM_MINMAX_HPP 17 18 /* PROPOSED STANDARD EXTENSIONS: 19 * 20 * minmax(a, b) 21 * Effect: (b<a) ? std::make_pair(b,a) : std::make_pair(a,b); 22 * 23 * minmax(a, b, comp) 24 * Effect: comp(b,a) ? std::make_pair(b,a) : std::make_pair(a,b); 25 * 26 */ 27 28 #include <boost/tuple/tuple.hpp> // for using pairs with boost::cref 29 #include <boost/ref.hpp> 30 31 namespace boost { 32 33 template <typename T> 34 tuple< T const&, T const& > minmax(T const & a,T const & b)35 minmax(T const& a, T const& b) { 36 return (b<a) ? make_tuple(cref(b),cref(a)) : make_tuple(cref(a),cref(b)); 37 } 38 39 template <typename T, class BinaryPredicate> 40 tuple< T const&, T const& > minmax(T const & a,T const & b,BinaryPredicate comp)41 minmax(T const& a, T const& b, BinaryPredicate comp) { 42 return comp(b,a) ? make_tuple(cref(b),cref(a)) : make_tuple(cref(a),cref(b)); 43 } 44 45 } // namespace boost 46 47 #endif // BOOST_ALGORITHM_MINMAX_HPP 48