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68 lines
1.8 KiB
68 lines
1.8 KiB
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#ifndef BOOST_MPL_INSERT_IMPL_HPP_INCLUDED |
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#define BOOST_MPL_INSERT_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: insert_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/reverse_fold.hpp> |
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#include <boost/mpl/iterator_range.hpp> |
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#include <boost/mpl/clear.hpp> |
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#include <boost/mpl/push_front.hpp> |
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#include <boost/mpl/aux_/na_spec.hpp> |
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#include <boost/mpl/aux_/traits_lambda_spec.hpp> |
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#include <boost/type_traits/is_same.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 'insert_impl' or the primary 'insert' template |
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template< typename Tag > |
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struct insert_impl |
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{ |
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template< |
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typename Sequence |
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, typename Pos |
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, typename T |
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> |
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struct apply |
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{ |
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typedef iterator_range< |
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typename begin<Sequence>::type |
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, Pos |
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> first_half_; |
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typedef iterator_range< |
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Pos |
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, typename end<Sequence>::type |
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> second_half_; |
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typedef typename reverse_fold< |
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second_half_ |
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, typename clear<Sequence>::type |
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, push_front<_,_> |
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>::type half_sequence_; |
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typedef typename reverse_fold< |
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first_half_ |
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, typename push_front<half_sequence_,T>::type |
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, push_front<_,_> |
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>::type type; |
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}; |
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}; |
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BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(3,insert_impl) |
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}} |
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#endif // BOOST_MPL_INSERT_IMPL_HPP_INCLUDED
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