1
2#ifndef BOOST_MPL_SAME_AS_HPP_INCLUDED
3#define BOOST_MPL_SAME_AS_HPP_INCLUDED
4
5// Copyright Aleksey Gurtovoy 2000-2004
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// $Id$
14// $Date$
15// $Revision$
16
17#include <boost/mpl/not.hpp>
18#include <boost/mpl/aux_/lambda_spec.hpp>
19#include <boost/mpl/aux_/config/forwarding.hpp>
20
21#include <boost/type_traits/is_same.hpp>
22
23namespace boost { namespace mpl {
24
25template< typename T1 >
26struct same_as
27{
28 template< typename T2 > struct apply
29#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
30 : is_same<T1,T2>
31 {
32#else
33 {
34 typedef typename is_same<T1,T2>::type type;
35#endif
36 };
37};
38
39template< typename T1 >
40struct not_same_as
41{
42 template< typename T2 > struct apply
43#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
44 : not_< is_same<T1,T2> >
45 {
46#else
47 {
48 typedef typename not_< is_same<T1,T2> >::type type;
49#endif
50 };
51};
52
53}}
54
55#endif // BOOST_MPL_SAME_AS_HPP_INCLUDED
56