129 lines
3.6 KiB
C++
129 lines
3.6 KiB
C++
|
|
#if !defined(BOOST_PP_IS_ITERATING)
|
|
|
|
///// header body
|
|
|
|
#ifndef BOOST_MPL_AUX778076_ADVANCE_BACKWARD_HPP_INCLUDED
|
|
#define BOOST_MPL_AUX778076_ADVANCE_BACKWARD_HPP_INCLUDED
|
|
|
|
// Copyright Aleksey Gurtovoy 2000-2004
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0.
|
|
// (See accompanying file LICENSE_1_0.txt or copy at
|
|
// http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
// See http://www.boost.org/libs/mpl for documentation.
|
|
|
|
// $Id: advance_backward.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
|
|
// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
|
|
// $Revision: 49267 $
|
|
|
|
#if !defined(BOOST_MPL_PREPROCESSING_MODE)
|
|
# include <boost/mpl/prior.hpp>
|
|
# include <boost/mpl/apply_wrap.hpp>
|
|
#endif
|
|
|
|
#include <boost/mpl/aux_/config/use_preprocessed.hpp>
|
|
|
|
#if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
|
|
&& !defined(BOOST_MPL_PREPROCESSING_MODE)
|
|
|
|
# define BOOST_MPL_PREPROCESSED_HEADER advance_backward.hpp
|
|
# include <boost/mpl/aux_/include_preprocessed.hpp>
|
|
|
|
#else
|
|
|
|
# include <boost/mpl/limits/unrolling.hpp>
|
|
# include <boost/mpl/aux_/nttp_decl.hpp>
|
|
# include <boost/mpl/aux_/config/eti.hpp>
|
|
|
|
# include <boost/preprocessor/iterate.hpp>
|
|
# include <boost/preprocessor/cat.hpp>
|
|
# include <boost/preprocessor/inc.hpp>
|
|
|
|
namespace boost { namespace mpl { namespace aux {
|
|
|
|
// forward declaration
|
|
template< BOOST_MPL_AUX_NTTP_DECL(long, N) > struct advance_backward;
|
|
|
|
# define BOOST_PP_ITERATION_PARAMS_1 \
|
|
(3,(0, BOOST_MPL_LIMIT_UNROLLING, <boost/mpl/aux_/advance_backward.hpp>))
|
|
# include BOOST_PP_ITERATE()
|
|
|
|
// implementation for N that exceeds BOOST_MPL_LIMIT_UNROLLING
|
|
template< BOOST_MPL_AUX_NTTP_DECL(long, N) >
|
|
struct advance_backward
|
|
{
|
|
template< typename Iterator > struct apply
|
|
{
|
|
typedef typename apply_wrap1<
|
|
advance_backward<BOOST_MPL_LIMIT_UNROLLING>
|
|
, Iterator
|
|
>::type chunk_result_;
|
|
|
|
typedef typename apply_wrap1<
|
|
advance_backward<(
|
|
(N - BOOST_MPL_LIMIT_UNROLLING) < 0
|
|
? 0
|
|
: N - BOOST_MPL_LIMIT_UNROLLING
|
|
)>
|
|
, chunk_result_
|
|
>::type type;
|
|
};
|
|
};
|
|
|
|
}}}
|
|
|
|
#endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
|
|
#endif // BOOST_MPL_AUX778076_ADVANCE_BACKWARD_HPP_INCLUDED
|
|
|
|
///// iteration, depth == 1
|
|
|
|
// For gcc 4.4 compatability, we must include the
|
|
// BOOST_PP_ITERATION_DEPTH test inside an #else clause.
|
|
#else // BOOST_PP_IS_ITERATING
|
|
#if BOOST_PP_ITERATION_DEPTH() == 1
|
|
#define i_ BOOST_PP_FRAME_ITERATION(1)
|
|
|
|
template<>
|
|
struct advance_backward< BOOST_PP_FRAME_ITERATION(1) >
|
|
{
|
|
template< typename Iterator > struct apply
|
|
{
|
|
typedef Iterator iter0;
|
|
|
|
#if i_ > 0
|
|
# define BOOST_PP_ITERATION_PARAMS_2 \
|
|
(3,(1, BOOST_PP_FRAME_ITERATION(1), <boost/mpl/aux_/advance_backward.hpp>))
|
|
# include BOOST_PP_ITERATE()
|
|
#endif
|
|
|
|
typedef BOOST_PP_CAT(iter,BOOST_PP_FRAME_ITERATION(1)) type;
|
|
};
|
|
|
|
#if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
|
|
/// ETI workaround
|
|
template<> struct apply<int>
|
|
{
|
|
typedef int type;
|
|
};
|
|
#endif
|
|
};
|
|
|
|
#undef i_
|
|
|
|
///// iteration, depth == 2
|
|
|
|
#elif BOOST_PP_ITERATION_DEPTH() == 2
|
|
|
|
# define AUX778076_ITER_0 BOOST_PP_CAT(iter,BOOST_PP_DEC(BOOST_PP_FRAME_ITERATION(2)))
|
|
# define AUX778076_ITER_1 BOOST_PP_CAT(iter,BOOST_PP_FRAME_ITERATION(2))
|
|
|
|
typedef typename prior<AUX778076_ITER_0>::type AUX778076_ITER_1;
|
|
|
|
# undef AUX778076_ITER_1
|
|
# undef AUX778076_ITER_0
|
|
|
|
#endif // BOOST_PP_ITERATION_DEPTH()
|
|
#endif // BOOST_PP_IS_ITERATING
|