source: NonGTP/Boost/boost/mpl/aux_/numeric_cast_utils.hpp @ 857

Revision 857, 1.9 KB checked in by igarcia, 19 years ago (diff)
Line 
1
2#ifndef BOOST_MPL_AUX_NUMERIC_CAST_HPP_INCLUDED
3#define BOOST_MPL_AUX_NUMERIC_CAST_HPP_INCLUDED
4
5// Copyright Aleksey Gurtovoy 2003-2004
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// $Source: /cvsroot/boost/boost/boost/mpl/aux_/numeric_cast_utils.hpp,v $
14// $Date: 2004/11/28 01:39:23 $
15// $Revision: 1.2 $
16
17#include <boost/mpl/numeric_cast.hpp>
18#include <boost/mpl/apply_wrap.hpp>
19#include <boost/mpl/aux_/config/forwarding.hpp>
20
21namespace boost { namespace mpl { namespace aux {
22
23template<
24      typename F
25    , typename Tag1
26    , typename Tag2
27    >
28struct cast1st_impl
29{
30    template< typename N1, typename N2 > struct apply
31#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
32        : apply_wrap2<
33              F
34            , typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag1,Tag2>,N1 >::type
35            , N2
36            >
37    {
38#else
39    {
40    typedef typename apply_wrap2<
41              F
42            , typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag1,Tag2>,N1 >::type
43            , N2
44            >::type type;
45#endif
46    };
47};
48
49template<
50      typename F
51    , typename Tag1
52    , typename Tag2
53    >
54struct cast2nd_impl
55{
56    template< typename N1, typename N2 > struct apply
57#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
58        : apply_wrap2<
59              F
60            , N1
61            , typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag2,Tag1>,N2 >::type
62            >
63    {
64#else
65    {
66        typedef typename apply_wrap2<
67              F
68            , N1
69            , typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag2,Tag1>,N2 >::type
70            >::type type;
71#endif
72    };
73};
74
75}}}
76
77#endif // BOOST_MPL_AUX_NUMERIC_CAST_HPP_INCLUDED
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