1
2#ifndef BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED
3#define BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED
4
5// Copyright Eric Friedman 2002
6// Copyright Aleksey Gurtovoy 2004
7//
8// Distributed under the Boost Software License, Version 1.0.
9// (See accompanying file LICENSE_1_0.txt or copy at
10// http://www.boost.org/LICENSE_1_0.txt)
11//
12// See http://www.boost.org/libs/mpl for documentation.
13
14// $Id$
15// $Date$
16// $Revision$
17
18#include <boost/mpl/contains_fwd.hpp>
19#include <boost/mpl/begin_end.hpp>
20#include <boost/mpl/find.hpp>
21#include <boost/mpl/not.hpp>
22#include <boost/mpl/aux_/traits_lambda_spec.hpp>
23#include <boost/mpl/aux_/config/forwarding.hpp>
24#include <boost/mpl/aux_/config/static_constant.hpp>
25
26#include <boost/type_traits/is_same.hpp>
27
28namespace boost { namespace mpl {
29
30template< typename Tag >
31struct contains_impl
32{
33 template< typename Sequence, typename T > struct apply
34#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
35 : not_< is_same<
36 typename find<Sequence,T>::type
37 , typename end<Sequence>::type
38 > >
39 {
40#else
41 {
42 typedef not_< is_same<
43 typename find<Sequence,T>::type
44 , typename end<Sequence>::type
45 > > type;
46
47 BOOST_STATIC_CONSTANT(bool, value =
48 (not_< is_same<
49 typename find<Sequence,T>::type
50 , typename end<Sequence>::type
51 > >::value)
52 );
53#endif
54 };
55};
56
57BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,contains_impl)
58
59}}
60
61#endif // BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED
62