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 // $Source: /cvsroot/boost/boost/boost/mpl/same_as.hpp,v $

    14 // $Date: 2004/09/02 15:40:42 $

    15 // $Revision: 1.6 $

    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 

    23 namespace boost { namespace mpl {

    24 

    25 template< typename T1 >

    26 struct 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 

    39 template< typename T1 >

    40 struct 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