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41 lines
1.1 KiB
41 lines
1.1 KiB
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#ifndef BOOST_MPL_AUX_FRONT_IMPL_HPP_INCLUDED |
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#define BOOST_MPL_AUX_FRONT_IMPL_HPP_INCLUDED |
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// Copyright Aleksey Gurtovoy 2000-2004 |
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// |
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// Distributed under the Boost Software License, Version 1.0. |
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// (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// See http://www.boost.org/libs/mpl for documentation. |
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// $Id: front_impl.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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// $Revision: 49267 $ |
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#include <boost/mpl/front_fwd.hpp> |
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#include <boost/mpl/begin_end.hpp> |
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#include <boost/mpl/deref.hpp> |
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#include <boost/mpl/aux_/traits_lambda_spec.hpp> |
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namespace boost { namespace mpl { |
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// default implementation; conrete sequences might override it by |
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// specializing either the 'front_impl' or the primary 'front' template |
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template< typename Tag > |
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struct front_impl |
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{ |
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template< typename Sequence > struct apply |
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{ |
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typedef typename begin<Sequence>::type iter_; |
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typedef typename deref<iter_>::type type; |
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}; |
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}; |
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BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1,front_impl) |
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}} |
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#endif // BOOST_MPL_AUX_FRONT_IMPL_HPP_INCLUDED
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