1 2 #ifndef BOOST_MPL_AUX_PARTITION_OP_HPP_INCLUDED 3 #define BOOST_MPL_AUX_PARTITION_OP_HPP_INCLUDED 4 5 // Copyright Eric Friedman 2003 6 // Copyright Aleksey Gurtovoy 2004 7 // 8 // Distributed under the Boost Software License, Version 1.0. 9 // (See accompanying file LICENSE_1_0.txt or copy at 10 // http://www.boost.org/LICENSE_1_0.txt) 11 // 12 // See http://www.boost.org/libs/mpl for documentation. 13 14 // $Id$ 15 // $Date$ 16 // $Revision$ 17 18 #include <boost/mpl/apply.hpp> 19 #include <boost/mpl/eval_if.hpp> 20 #include <boost/mpl/if.hpp> 21 #include <boost/mpl/pair.hpp> 22 #include <boost/mpl/aux_/lambda_spec.hpp> 23 24 namespace boost { namespace mpl { 25 26 namespace aux { 27 28 template< typename Pred, typename In1Op, typename In2Op > 29 struct partition_op 30 { 31 template< typename State, typename T > 32 struct apply 33 { 34 typedef typename State::first first_; 35 typedef typename State::second second_; 36 typedef typename apply1< Pred,T >::type pred_; 37 38 typedef typename eval_if< 39 pred_ 40 , apply2<In1Op,first_,T> 41 , apply2<In2Op,second_,T> 42 >::type result_; 43 44 typedef typename if_< 45 pred_ 46 , pair< result_,second_ > 47 , pair< first_,result_ > 48 >::type type; 49 }; 50 }; 51 52 } // namespace aux 53 54 BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(3, aux::partition_op) 55 56 }} 57 58 #endif // BOOST_MPL_AUX_PARTITION_OP_HPP_INCLUDED 59