imgtools/imglib/boostlibrary/boost/mpl/transform.hpp
author Mike Kinghan <mikek@symbian.org>
Tue, 13 Jul 2010 15:21:54 +0100
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permissions -rwxr-xr-x
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#ifndef BOOST_MPL_TRANSFORM_HPP_INCLUDED
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#define BOOST_MPL_TRANSFORM_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2004
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// Copyright David Abrahams 2003-2004
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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: transform.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/fold.hpp>
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#include <boost/mpl/reverse_fold.hpp>
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#include <boost/mpl/pair_view.hpp>
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#include <boost/mpl/is_sequence.hpp>
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#include <boost/mpl/eval_if.hpp>
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#include <boost/mpl/lambda.hpp>
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#include <boost/mpl/bind.hpp>
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#include <boost/mpl/or.hpp>
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#include <boost/mpl/not.hpp>
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#include <boost/mpl/aux_/na.hpp>
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#include <boost/mpl/aux_/inserter_algorithm.hpp>
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namespace boost { namespace mpl {
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namespace aux { 
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template< 
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      typename Seq
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    , typename Op
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    , typename In
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    >
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struct transform1_impl
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    : fold< 
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          Seq
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        , typename In::state
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        , bind2< typename lambda< typename In::operation >::type
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            , _1
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            , bind1< typename lambda<Op>::type, _2>
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            > 
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        >
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{
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};
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template< 
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      typename Seq
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    , typename Op
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    , typename In
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    >
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struct reverse_transform1_impl
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    : reverse_fold< 
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          Seq
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        , typename In::state
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        , bind2< typename lambda< typename In::operation >::type
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            , _1
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            , bind1< typename lambda<Op>::type, _2>
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            > 
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        >
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{
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};
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template< 
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      typename Seq1
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    , typename Seq2
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    , typename Op
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    , typename In
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    >
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struct transform2_impl
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    : fold< 
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          pair_view<Seq1,Seq2>
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        , typename In::state
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        , bind2< typename lambda< typename In::operation >::type
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            , _1
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            , bind2<
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                  typename lambda<Op>::type
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                , bind1<first<>,_2>
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                , bind1<second<>,_2>
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                >
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            > 
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        >
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{
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};
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template< 
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      typename Seq1
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    , typename Seq2
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    , typename Op
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    , typename In
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    >
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struct reverse_transform2_impl
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    : reverse_fold< 
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          pair_view<Seq1,Seq2>
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        , typename In::state
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        , bind2< typename lambda< typename In::operation >::type
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            , _1
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            , bind2< typename lambda< Op >::type
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                , bind1<first<>,_2>
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                , bind1<second<>,_2>
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                >
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            > 
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        >
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{
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};
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} // namespace aux 
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BOOST_MPL_AUX_INSERTER_ALGORITHM_DEF(3, transform1)                    
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BOOST_MPL_AUX_INSERTER_ALGORITHM_DEF(4, transform2)
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#define AUX778076_TRANSFORM_DEF(name)                                   \
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template<                                                               \
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      typename BOOST_MPL_AUX_NA_PARAM(Seq1)                             \
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    , typename BOOST_MPL_AUX_NA_PARAM(Seq2OrOperation)                  \
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    , typename BOOST_MPL_AUX_NA_PARAM(OperationOrInserter)              \
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    , typename BOOST_MPL_AUX_NA_PARAM(Inserter)                         \
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    >                                                                   \
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struct name                                                             \
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{                                                                       \
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    typedef typename eval_if<                                           \
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          or_<                                                          \
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              is_na<OperationOrInserter>                                \
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            , is_lambda_expression< Seq2OrOperation >                   \
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            , not_< is_sequence<Seq2OrOperation> >                      \
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            >                                                           \
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        , name##1<Seq1,Seq2OrOperation,OperationOrInserter>             \
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        , name##2<Seq1,Seq2OrOperation,OperationOrInserter,Inserter>    \
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        >::type type;                                                   \
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};                                                                      \
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BOOST_MPL_AUX_NA_SPEC(4, name)                                          \
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/**/
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AUX778076_TRANSFORM_DEF(transform)
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AUX778076_TRANSFORM_DEF(reverse_transform)
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#undef AUX778076_TRANSFORM_DEF
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}}
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#endif // BOOST_MPL_TRANSFORM_HPP_INCLUDED