src/boost/mpl/has_key.hpp

   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 // $Source: /cvsroot/boost/boost/boost/mpl/has_key.hpp,v $
  15 // $Date: 2004/09/02 15:40:41 $
  16 // $Revision: 1.3 $
  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
  24 namespace boost { namespace mpl {
  25
  26 template<
  27       typename BOOST_MPL_AUX_NA_PARAM(AssociativeSequence)
  28     , typename BOOST_MPL_AUX_NA_PARAM(Key)
  29     >
  30 struct 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
  37 BOOST_MPL_AUX_NA_SPEC(2, has_key)
  38
  39 }}
  40
  41 #endif // BOOST_MPL_HAS_KEY_HPP_INCLUDED