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 | |