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/src/contrib/boost/mpl/has_key.hpp

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C++ Header | 41 lines | 21 code | 9 blank | 11 comment | 0 complexity | b0632b47bace972d8affd25668a8545a MD5 | raw file
 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: has_key.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
15// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
16// $Revision: 49267 $
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