129 lines
3.5 KiB
Plaintext
129 lines
3.5 KiB
Plaintext
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#if !defined(BOOST_PP_IS_ITERATING)
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///// header body
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#ifndef BOOST_MPL_AUX778076_ADVANCE_BACKWARD_HPP_INCLUDED
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#define BOOST_MPL_AUX778076_ADVANCE_BACKWARD_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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// $Id$
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// $Date$
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// $Revision$
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#if !defined(BOOST_MPL_PREPROCESSING_MODE)
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# include <boost/mpl/prior.hpp>
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# include <boost/mpl/apply_wrap.hpp>
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#endif
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#include <boost/mpl/aux_/config/use_preprocessed.hpp>
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#if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
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&& !defined(BOOST_MPL_PREPROCESSING_MODE)
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# define BOOST_MPL_PREPROCESSED_HEADER advance_backward.hpp
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# include <boost/mpl/aux_/include_preprocessed.hpp>
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#else
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# include <boost/mpl/limits/unrolling.hpp>
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# include <boost/mpl/aux_/nttp_decl.hpp>
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# include <boost/mpl/aux_/config/eti.hpp>
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# include <boost/preprocessor/iterate.hpp>
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# include <boost/preprocessor/cat.hpp>
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# include <boost/preprocessor/inc.hpp>
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namespace boost { namespace mpl { namespace aux {
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// forward declaration
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template< BOOST_MPL_AUX_NTTP_DECL(long, N) > struct advance_backward;
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# define BOOST_PP_ITERATION_PARAMS_1 \
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(3,(0, BOOST_MPL_LIMIT_UNROLLING, <boost/mpl/aux_/advance_backward.hpp>))
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# include BOOST_PP_ITERATE()
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// implementation for N that exceeds BOOST_MPL_LIMIT_UNROLLING
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template< BOOST_MPL_AUX_NTTP_DECL(long, N) >
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struct advance_backward
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{
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template< typename Iterator > struct apply
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{
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typedef typename apply_wrap1<
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advance_backward<BOOST_MPL_LIMIT_UNROLLING>
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, Iterator
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>::type chunk_result_;
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typedef typename apply_wrap1<
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advance_backward<(
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(N - BOOST_MPL_LIMIT_UNROLLING) < 0
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? 0
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: N - BOOST_MPL_LIMIT_UNROLLING
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)>
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, chunk_result_
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>::type type;
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};
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};
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}}}
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#endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
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#endif // BOOST_MPL_AUX778076_ADVANCE_BACKWARD_HPP_INCLUDED
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///// iteration, depth == 1
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// For gcc 4.4 compatability, we must include the
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// BOOST_PP_ITERATION_DEPTH test inside an #else clause.
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#else // BOOST_PP_IS_ITERATING
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#if BOOST_PP_ITERATION_DEPTH() == 1
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#define i_ BOOST_PP_FRAME_ITERATION(1)
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template<>
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struct advance_backward< BOOST_PP_FRAME_ITERATION(1) >
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{
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template< typename Iterator > struct apply
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{
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typedef Iterator iter0;
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#if i_ > 0
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# define BOOST_PP_ITERATION_PARAMS_2 \
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(3,(1, BOOST_PP_FRAME_ITERATION(1), <boost/mpl/aux_/advance_backward.hpp>))
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# include BOOST_PP_ITERATE()
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#endif
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typedef BOOST_PP_CAT(iter,BOOST_PP_FRAME_ITERATION(1)) type;
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};
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#if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
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/// ETI workaround
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template<> struct apply<int>
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{
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typedef int type;
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};
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#endif
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};
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#undef i_
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///// iteration, depth == 2
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#elif BOOST_PP_ITERATION_DEPTH() == 2
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# define AUX778076_ITER_0 BOOST_PP_CAT(iter,BOOST_PP_DEC(BOOST_PP_FRAME_ITERATION(2)))
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# define AUX778076_ITER_1 BOOST_PP_CAT(iter,BOOST_PP_FRAME_ITERATION(2))
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typedef typename prior<AUX778076_ITER_0>::type AUX778076_ITER_1;
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# undef AUX778076_ITER_1
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# undef AUX778076_ITER_0
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#endif // BOOST_PP_ITERATION_DEPTH()
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#endif // BOOST_PP_IS_ITERATING
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