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for_each.hpp in vendors/XIOS/current/extern/boost/include/boost/mpl – NEMO

source: vendors/XIOS/current/extern/boost/include/boost/mpl/for_each.hpp @ 3428

Last change on this file since 3428 was 3428, checked in by rblod, 12 years ago

importing initial XIOS vendor drop

File size: 2.8 KB
Line 
1
2#ifndef BOOST_MPL_FOR_EACH_HPP_INCLUDED
3#define BOOST_MPL_FOR_EACH_HPP_INCLUDED
4
5// Copyright Aleksey Gurtovoy 2000-2008
6//
7// Distributed under the Boost Software License, Version 1.0.
8// (See accompanying file LICENSE_1_0.txt or copy at
9// http://www.boost.org/LICENSE_1_0.txt)
10//
11// See http://www.boost.org/libs/mpl for documentation.
12
13// $Id: for_each.hpp 55648 2009-08-18 05:16:53Z agurtovoy $
14// $Date: 2009-08-18 01:16:53 -0400 (Tue, 18 Aug 2009) $
15// $Revision: 55648 $
16
17#include <boost/mpl/is_sequence.hpp>
18#include <boost/mpl/begin_end.hpp>
19#include <boost/mpl/apply.hpp>
20#include <boost/mpl/bool.hpp>
21#include <boost/mpl/next_prior.hpp>
22#include <boost/mpl/deref.hpp>
23#include <boost/mpl/identity.hpp>
24#include <boost/mpl/assert.hpp>
25#include <boost/mpl/aux_/unwrap.hpp>
26
27#include <boost/type_traits/is_same.hpp>
28#include <boost/utility/value_init.hpp>
29
30namespace boost { namespace mpl {
31
32namespace aux {
33
34template< bool done = true >
35struct for_each_impl
36{
37    template<
38          typename Iterator
39        , typename LastIterator
40        , typename TransformFunc
41        , typename F
42        >
43    static void execute(
44          Iterator*
45        , LastIterator*
46        , TransformFunc*
47        , F
48        )
49    {
50    }
51};
52
53template<>
54struct for_each_impl<false>
55{
56    template<
57          typename Iterator
58        , typename LastIterator
59        , typename TransformFunc
60        , typename F
61        >
62    static void execute(
63          Iterator*
64        , LastIterator*
65        , TransformFunc* 
66        , F f
67        )
68    {
69        typedef typename deref<Iterator>::type item;
70        typedef typename apply1<TransformFunc,item>::type arg;
71   
72        // dwa 2002/9/10 -- make sure not to invoke undefined behavior
73        // when we pass arg.
74        value_initialized<arg> x;
75        aux::unwrap(f, 0)(boost::get(x));
76       
77        typedef typename mpl::next<Iterator>::type iter;
78        for_each_impl<boost::is_same<iter,LastIterator>::value>
79            ::execute( static_cast<iter*>(0), static_cast<LastIterator*>(0), static_cast<TransformFunc*>(0), f);
80    }
81};
82
83} // namespace aux
84
85// agurt, 17/mar/02: pointer default parameters are necessary to workaround
86// MSVC 6.5 function template signature's mangling bug
87template<
88      typename Sequence
89    , typename TransformOp
90    , typename F
91    >
92inline
93void for_each(F f, Sequence* = 0, TransformOp* = 0)
94{
95    BOOST_MPL_ASSERT(( is_sequence<Sequence> ));
96
97    typedef typename begin<Sequence>::type first;
98    typedef typename end<Sequence>::type last;
99
100    aux::for_each_impl< boost::is_same<first,last>::value >
101        ::execute(static_cast<first*>(0), static_cast<last*>(0), static_cast<TransformOp*>(0), f);
102}
103
104template<
105      typename Sequence
106    , typename F
107    >
108inline
109void for_each(F f, Sequence* = 0)
110{
111    for_each<Sequence, identity<> >(f);
112}
113
114}}
115
116#endif // BOOST_MPL_FOR_EACH_HPP_INCLUDED
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