1
2#ifndef BOOST_MPL_HAS_KEY_HPP_INCLUDED
3#define BOOST_MPL_HAS_KEY_HPP_INCLUDED
4
5// Copyright Aleksey Gurtovoy 2003-2004
6// Copyright David Abrahams 2003-2004
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/has_key_fwd.hpp>
19#include <boost/mpl/sequence_tag.hpp>
20#include <boost/mpl/aux_/has_key_impl.hpp>
21#include <boost/mpl/aux_/na_spec.hpp>
22#include <boost/mpl/aux_/lambda_support.hpp>
23
24namespace boost { namespace mpl {
25
26template<
27 typename BOOST_MPL_AUX_NA_PARAM(AssociativeSequence)
28 , typename BOOST_MPL_AUX_NA_PARAM(Key)
29 >
30struct has_key
31 : has_key_impl< typename sequence_tag<AssociativeSequence>::type >
32 ::template apply<AssociativeSequence,Key>
33{
34 BOOST_MPL_AUX_LAMBDA_SUPPORT(2,has_key,(AssociativeSequence,Key))
35};
36
37BOOST_MPL_AUX_NA_SPEC(2, has_key)
38
39}}
40
41#endif // BOOST_MPL_HAS_KEY_HPP_INCLUDED
42

source code of include/boost/mpl/has_key.hpp