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/Src/Dependencies/Boost/boost/mpl/copy_if.hpp

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C++ Header | 96 lines | 72 code | 13 blank | 11 comment | 0 complexity | 8b6e75765ec42c751e4e782e792a60fb MD5 | raw file
 1
 2#ifndef BOOST_MPL_COPY_IF_HPP_INCLUDED
 3#define BOOST_MPL_COPY_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: copy_if.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
15// $Date: 2008-10-11 17:19:02 +1100 (Sat, 11 Oct 2008) $
16// $Revision: 49267 $
17
18#include <boost/mpl/fold.hpp>
19#include <boost/mpl/reverse_fold.hpp>
20#include <boost/mpl/apply.hpp>
21#include <boost/mpl/eval_if.hpp>
22#include <boost/mpl/identity.hpp>
23#include <boost/mpl/protect.hpp>
24#include <boost/mpl/aux_/inserter_algorithm.hpp>
25#include <boost/mpl/aux_/config/forwarding.hpp>
26
27namespace boost { namespace mpl {
28
29namespace aux {
30
31template<
32      typename Operation
33    , typename Predicate
34    >
35struct copy_if_op
36{
37    template< typename Sequence, typename T > struct apply
38#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
39        : eval_if<
40              typename apply1<Predicate,T>::type
41            , apply2<Operation,Sequence,T>
42            , identity<Sequence>
43            >
44    {
45#else
46    {
47        typedef typename eval_if<
48              typename apply1<Predicate,T>::type
49            , apply2<Operation,Sequence,T>
50            , identity<Sequence>
51            >::type type;
52#endif
53    };
54};
55
56template<
57      typename Sequence
58    , typename Predicate
59    , typename Inserter
60    >
61struct copy_if_impl
62    : fold<
63          Sequence
64        , typename Inserter::state
65        , protect< aux::copy_if_op<
66              typename Inserter::operation
67            , Predicate
68            > >
69        >
70{
71};
72
73template<
74      typename Sequence
75    , typename Predicate
76    , typename Inserter
77    >
78struct reverse_copy_if_impl
79    : reverse_fold<
80          Sequence
81        , typename Inserter::state
82        , protect< aux::copy_if_op<
83              typename Inserter::operation
84            , Predicate
85            > >
86        >
87{
88};
89
90} // namespace aux
91
92BOOST_MPL_AUX_INSERTER_ALGORITHM_DEF(3, copy_if)
93
94}}
95
96#endif // BOOST_MPL_COPY_IF_HPP_INCLUDED