has_key.hpp

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#ifndef BOOST_MPL_HAS_KEY_HPP_INCLUDED
#define BOOST_MPL_HAS_KEY_HPP_INCLUDED
 
// Copyright Aleksey Gurtovoy 2003-2004
// Copyright David Abrahams 2003-2004
//
// Distributed under the Boost Software License, Version 1.0. 
// (See accompanying file LICENSE_1_0.txt or copy at 
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/libs/mpl for documentation.
 
// $Id: has_key.hpp 13472 2017-08-22 07:53:44Z richean $
// $Date: 2017-08-22 09:53:44 +0200 (Di, 22 Aug 2017) $
// $Revision: 13472 $
 
#include <boost/mpl/has_key_fwd.hpp>
#include <boost/mpl/sequence_tag.hpp>
#include <boost/mpl/aux_/has_key_impl.hpp>
#include <boost/mpl/aux_/na_spec.hpp>
#include <boost/mpl/aux_/lambda_support.hpp>
 
namespace boost { namespace mpl {
 
template<
      typename BOOST_MPL_AUX_NA_PARAM(AssociativeSequence)
    , typename BOOST_MPL_AUX_NA_PARAM(Key)
    >
struct has_key
    : has_key_impl< typename sequence_tag<AssociativeSequence>::type >
        ::template apply<AssociativeSequence,Key>
{
    BOOST_MPL_AUX_LAMBDA_SUPPORT(2,has_key,(AssociativeSequence,Key))
};
 
BOOST_MPL_AUX_NA_SPEC(2, has_key)
 
}}
 
#endif // BOOST_MPL_HAS_KEY_HPP_INCLUDED