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1 | |
2 | #ifndef BOOST_MPL_REMOVE_IF_HPP_INCLUDED | |
3 | #define BOOST_MPL_REMOVE_IF_HPP_INCLUDED | |
4 | ||
5 | // Copyright Aleksey Gurtovoy 2000-2004 | |
6 | // Copyright David Abrahams 2003-2004 | |
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/fold.hpp> | |
19 | #include <boost/mpl/reverse_fold.hpp> | |
20 | #include <boost/mpl/eval_if.hpp> | |
21 | #include <boost/mpl/identity.hpp> | |
22 | #include <boost/mpl/protect.hpp> | |
23 | #include <boost/mpl/lambda.hpp> | |
24 | #include <boost/mpl/apply.hpp> | |
25 | #include <boost/mpl/aux_/inserter_algorithm.hpp> | |
26 | ||
27 | namespace boost { namespace mpl { | |
28 | ||
29 | namespace aux { | |
30 | ||
31 | template< typename Pred, typename InsertOp > struct remove_if_helper | |
32 | { | |
33 | template< typename Sequence, typename U > struct apply | |
34 | { | |
35 | typedef typename eval_if< | |
36 | typename apply1<Pred,U>::type | |
37 | , identity<Sequence> | |
38 | , apply2<InsertOp,Sequence,U> | |
39 | >::type type; | |
40 | }; | |
41 | }; | |
42 | ||
43 | template< | |
44 | typename Sequence | |
45 | , typename Predicate | |
46 | , typename Inserter | |
47 | > | |
48 | struct remove_if_impl | |
49 | : fold< | |
50 | Sequence | |
51 | , typename Inserter::state | |
52 | , protect< aux::remove_if_helper< | |
53 | typename lambda<Predicate>::type | |
54 | , typename Inserter::operation | |
55 | > > | |
56 | > | |
57 | { | |
58 | }; | |
59 | ||
60 | template< | |
61 | typename Sequence | |
62 | , typename Predicate | |
63 | , typename Inserter | |
64 | > | |
65 | struct reverse_remove_if_impl | |
66 | : reverse_fold< | |
67 | Sequence | |
68 | , typename Inserter::state | |
69 | , protect< aux::remove_if_helper< | |
70 | typename lambda<Predicate>::type | |
71 | , typename Inserter::operation | |
72 | > > | |
73 | > | |
74 | { | |
75 | }; | |
76 | ||
77 | } // namespace aux | |
78 | ||
79 | BOOST_MPL_AUX_INSERTER_ALGORITHM_DEF(3, remove_if) | |
80 | ||
81 | }} | |
82 | ||
83 | #endif // BOOST_MPL_REMOVE_IF_HPP_INCLUDED |