1 
2 #ifndef BOOST_MPL_REPLACE_IF_HPP_INCLUDED
3 #define BOOST_MPL_REPLACE_IF_HPP_INCLUDED
4 
5 // Copyright Aleksey Gurtovoy 2000-2004
6 // Copyright John R. Bandela 2000-2002
7 // Copyright David Abrahams 2003-2004
8 //
9 // Distributed under the Boost Software License, Version 1.0.
10 // (See accompanying file LICENSE_1_0.txt or copy at
11 // http://www.boost.org/LICENSE_1_0.txt)
12 //
13 // See http://www.boost.org/libs/mpl for documentation.
14 
15 // $Id$
16 // $Date$
17 // $Revision$
18 
19 #include <boost/mpl/transform.hpp>
20 #include <boost/mpl/apply.hpp>
21 #include <boost/mpl/if.hpp>
22 #include <boost/mpl/aux_/inserter_algorithm.hpp>
23 #include <boost/mpl/aux_/config/forwarding.hpp>
24 
25 namespace boost { namespace mpl {
26 
27 namespace aux {
28 
29 template< typename Predicate, typename T >
30 struct replace_if_op
31 {
32     template< typename U > struct apply
33 #if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
34         : if_<
35               typename apply1<Predicate,U>::type
36             , T
37             , U
38             >
39     {
40 #else
41     {
42         typedef typename if_<
43               typename apply1<Predicate,U>::type
44             , T
45             , U
46             >::type type;
47 #endif
48     };
49 };
50 
51 
52 template<
53       typename Sequence
54     , typename Predicate
55     , typename T
56     , typename Inserter
57     >
58 struct replace_if_impl
59     : transform1_impl<
60           Sequence
61         , protect< aux::replace_if_op<Predicate,T> >
62         , Inserter
63         >
64 {
65 };
66 
67 template<
68       typename Sequence
69     , typename Predicate
70     , typename T
71     , typename Inserter
72     >
73 struct reverse_replace_if_impl
74     : reverse_transform1_impl<
75           Sequence
76         , protect< aux::replace_if_op<Predicate,T> >
77         , Inserter
78         >
79 {
80 };
81 
82 } // namespace aux
83 
84 BOOST_MPL_AUX_INSERTER_ALGORITHM_DEF(4, replace_if)
85 
86 }}
87 
88 #endif // BOOST_MPL_REPLACE_IF_HPP_INCLUDED
89