mpl/aux_/count_impl.hpp

0001
0002 #ifndef BOOST_MPL_AUX_COUNT_IMPL_HPP_INCLUDED
0003 #define BOOST_MPL_AUX_COUNT_IMPL_HPP_INCLUDED
0004
0005 // Copyright Aleksey Gurtovoy 2000-2004
0006 //
0007 // Distributed under the Boost Software License, Version 1.0.
0008 // (See accompanying file LICENSE_1_0.txt or copy at
0009 // http://www.boost.org/LICENSE_1_0.txt)
0010 //
0011 // See http://www.boost.org/libs/mpl for documentation.
0012
0013 // $Id$
0014 // $Date$
0015 // $Revision$
0016
0017 #include <boost/mpl/count_fwd.hpp>
0018 #include <boost/mpl/count_if.hpp>
0019 #include <boost/mpl/same_as.hpp>
0020 #include <boost/mpl/aux_/config/static_constant.hpp>
0021 #include <boost/mpl/aux_/config/workaround.hpp>
0022 #include <boost/mpl/aux_/traits_lambda_spec.hpp>
0023
0024 namespace boost { namespace mpl {
0025
0026 template< typename Tag > struct count_impl
0027 {
0028     template< typename Sequence, typename T > struct apply
0029 #if BOOST_WORKAROUND(BOOST_BORLANDC,BOOST_TESTED_AT(0x561))
0030     {
0031         typedef typename count_if< Sequence,same_as<T> >::type type;
0032         BOOST_STATIC_CONSTANT(int, value = BOOST_MPL_AUX_VALUE_WKND(type)::value);
0033 #else
0034         : count_if< Sequence,same_as<T> >
0035     {
0036 #endif
0037     };
0038 };
0039
0040 BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,count_impl)
0041
0042 }}
0043
0044 #endif // BOOST_MPL_AUX_COUNT_IMPL_HPP_INCLUDED