413 lines
10 KiB
C++
413 lines
10 KiB
C++
|
|
||
|
|
// NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION!
|
||
|
|
|
||
|
|
#if !defined(BOOST_PP_IS_ITERATING)
|
||
|
|
|
||
|
|
// 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: reverse_fold_impl_body.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
|
||
|
|
// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
|
||
|
|
// $Revision: 49267 $
|
||
|
|
|
||
|
|
# include <boost/mpl/limits/unrolling.hpp>
|
||
|
|
# include <boost/mpl/aux_/preprocessor/repeat.hpp>
|
||
|
|
# include <boost/mpl/aux_/config/ctps.hpp>
|
||
|
|
# include <boost/mpl/aux_/nttp_decl.hpp>
|
||
|
|
|
||
|
|
# include <boost/preprocessor/arithmetic/sub.hpp>
|
||
|
|
# include <boost/preprocessor/iterate.hpp>
|
||
|
|
# include <boost/preprocessor/dec.hpp>
|
||
|
|
# include <boost/preprocessor/inc.hpp>
|
||
|
|
# include <boost/preprocessor/cat.hpp>
|
||
|
|
|
||
|
|
// local macros, #undef-ined at the end of the header
|
||
|
|
|
||
|
|
# define AUX778076_ITER_FOLD_FORWARD_STEP(unused, n_, unused2) \
|
||
|
|
typedef typename apply2< \
|
||
|
|
ForwardOp \
|
||
|
|
, BOOST_PP_CAT(fwd_state,n_) \
|
||
|
|
, AUX778076_FOLD_IMPL_OP(BOOST_PP_CAT(iter,n_)) \
|
||
|
|
>::type BOOST_PP_CAT(fwd_state,BOOST_PP_INC(n_)); \
|
||
|
|
typedef typename mpl::next<BOOST_PP_CAT(iter,n_)>::type \
|
||
|
|
BOOST_PP_CAT(iter,BOOST_PP_INC(n_)); \
|
||
|
|
/**/
|
||
|
|
|
||
|
|
# define AUX778076_ITER_FOLD_BACKWARD_STEP_FUNC(n_) \
|
||
|
|
typedef typename apply2< \
|
||
|
|
BackwardOp \
|
||
|
|
, BOOST_PP_CAT(bkwd_state,n_) \
|
||
|
|
, AUX778076_FOLD_IMPL_OP(BOOST_PP_CAT(iter,BOOST_PP_DEC(n_))) \
|
||
|
|
>::type BOOST_PP_CAT(bkwd_state,BOOST_PP_DEC(n_)); \
|
||
|
|
/**/
|
||
|
|
|
||
|
|
# define AUX778076_ITER_FOLD_BACKWARD_STEP(unused, n_, j) \
|
||
|
|
AUX778076_ITER_FOLD_BACKWARD_STEP_FUNC( \
|
||
|
|
BOOST_PP_SUB_D(1,j,n_) \
|
||
|
|
) \
|
||
|
|
/**/
|
||
|
|
|
||
|
|
# define AUX778076_FIRST_BACKWARD_STATE_TYPEDEF(n_) \
|
||
|
|
typedef typename nested_chunk::state BOOST_PP_CAT(bkwd_state,n_);
|
||
|
|
/**/
|
||
|
|
|
||
|
|
# define AUX778076_FOLD_IMPL_NAME \
|
||
|
|
BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_impl) \
|
||
|
|
/**/
|
||
|
|
|
||
|
|
# define AUX778076_FOLD_CHUNK_NAME \
|
||
|
|
BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_chunk) \
|
||
|
|
/**/
|
||
|
|
|
||
|
|
namespace boost { namespace mpl { namespace aux {
|
||
|
|
|
||
|
|
/// forward declaration
|
||
|
|
template<
|
||
|
|
BOOST_MPL_AUX_NTTP_DECL(long, N)
|
||
|
|
, typename First
|
||
|
|
, typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct AUX778076_FOLD_IMPL_NAME;
|
||
|
|
|
||
|
|
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
|
||
|
|
&& !defined(BOOST_MPL_CFG_NO_NONTYPE_TEMPLATE_PARTIAL_SPEC)
|
||
|
|
|
||
|
|
# define BOOST_PP_ITERATION_PARAMS_1 \
|
||
|
|
(3,(0, BOOST_MPL_LIMIT_UNROLLING, <boost/mpl/aux_/reverse_fold_impl_body.hpp>))
|
||
|
|
# include BOOST_PP_ITERATE()
|
||
|
|
|
||
|
|
// implementation for N that exceeds BOOST_MPL_LIMIT_UNROLLING
|
||
|
|
template<
|
||
|
|
BOOST_MPL_AUX_NTTP_DECL(long, N)
|
||
|
|
, typename First
|
||
|
|
, typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct AUX778076_FOLD_IMPL_NAME
|
||
|
|
{
|
||
|
|
typedef First iter0;
|
||
|
|
typedef State fwd_state0;
|
||
|
|
|
||
|
|
BOOST_MPL_PP_REPEAT(
|
||
|
|
BOOST_MPL_LIMIT_UNROLLING
|
||
|
|
, AUX778076_ITER_FOLD_FORWARD_STEP
|
||
|
|
, unused
|
||
|
|
)
|
||
|
|
|
||
|
|
typedef AUX778076_FOLD_IMPL_NAME<
|
||
|
|
( (N - BOOST_MPL_LIMIT_UNROLLING) < 0 ? 0 : N - BOOST_MPL_LIMIT_UNROLLING )
|
||
|
|
, BOOST_PP_CAT(iter,BOOST_MPL_LIMIT_UNROLLING)
|
||
|
|
, Last
|
||
|
|
, BOOST_PP_CAT(fwd_state,BOOST_MPL_LIMIT_UNROLLING)
|
||
|
|
, BackwardOp
|
||
|
|
, ForwardOp
|
||
|
|
> nested_chunk;
|
||
|
|
|
||
|
|
AUX778076_FIRST_BACKWARD_STATE_TYPEDEF(BOOST_MPL_LIMIT_UNROLLING)
|
||
|
|
|
||
|
|
BOOST_MPL_PP_REPEAT(
|
||
|
|
BOOST_MPL_LIMIT_UNROLLING
|
||
|
|
, AUX778076_ITER_FOLD_BACKWARD_STEP
|
||
|
|
, BOOST_MPL_LIMIT_UNROLLING
|
||
|
|
)
|
||
|
|
|
||
|
|
typedef bkwd_state0 state;
|
||
|
|
typedef typename nested_chunk::iterator iterator;
|
||
|
|
};
|
||
|
|
|
||
|
|
// fallback implementation for sequences of unknown size
|
||
|
|
template<
|
||
|
|
typename First
|
||
|
|
, typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct AUX778076_FOLD_IMPL_NAME<-1,First,Last,State,BackwardOp,ForwardOp>
|
||
|
|
{
|
||
|
|
typedef AUX778076_FOLD_IMPL_NAME<
|
||
|
|
-1
|
||
|
|
, typename mpl::next<First>::type
|
||
|
|
, Last
|
||
|
|
, typename apply2<ForwardOp,State,AUX778076_FOLD_IMPL_OP(First)>::type
|
||
|
|
, BackwardOp
|
||
|
|
, ForwardOp
|
||
|
|
> nested_step;
|
||
|
|
|
||
|
|
typedef typename apply2<
|
||
|
|
BackwardOp
|
||
|
|
, typename nested_step::state
|
||
|
|
, AUX778076_FOLD_IMPL_OP(First)
|
||
|
|
>::type state;
|
||
|
|
|
||
|
|
typedef typename nested_step::iterator iterator;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<
|
||
|
|
typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct AUX778076_FOLD_IMPL_NAME<-1,Last,Last,State,BackwardOp,ForwardOp>
|
||
|
|
{
|
||
|
|
typedef State state;
|
||
|
|
typedef Last iterator;
|
||
|
|
};
|
||
|
|
|
||
|
|
#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
||
|
|
|
||
|
|
template< BOOST_MPL_AUX_NTTP_DECL(long, N) >
|
||
|
|
struct AUX778076_FOLD_CHUNK_NAME;
|
||
|
|
|
||
|
|
# define BOOST_PP_ITERATION_PARAMS_1 \
|
||
|
|
(3,(0, BOOST_MPL_LIMIT_UNROLLING, <boost/mpl/aux_/reverse_fold_impl_body.hpp>))
|
||
|
|
# include BOOST_PP_ITERATE()
|
||
|
|
|
||
|
|
// implementation for N that exceeds BOOST_MPL_LIMIT_UNROLLING
|
||
|
|
template< BOOST_MPL_AUX_NTTP_DECL(long, N) >
|
||
|
|
struct AUX778076_FOLD_CHUNK_NAME
|
||
|
|
{
|
||
|
|
template<
|
||
|
|
typename First
|
||
|
|
, typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct result_
|
||
|
|
{
|
||
|
|
typedef First iter0;
|
||
|
|
typedef State fwd_state0;
|
||
|
|
|
||
|
|
BOOST_MPL_PP_REPEAT(
|
||
|
|
BOOST_MPL_LIMIT_UNROLLING
|
||
|
|
, AUX778076_ITER_FOLD_FORWARD_STEP
|
||
|
|
, unused
|
||
|
|
)
|
||
|
|
|
||
|
|
typedef AUX778076_FOLD_IMPL_NAME<
|
||
|
|
( (N - BOOST_MPL_LIMIT_UNROLLING) < 0 ? 0 : N - BOOST_MPL_LIMIT_UNROLLING )
|
||
|
|
, BOOST_PP_CAT(iter,BOOST_MPL_LIMIT_UNROLLING)
|
||
|
|
, Last
|
||
|
|
, BOOST_PP_CAT(fwd_state,BOOST_MPL_LIMIT_UNROLLING)
|
||
|
|
, BackwardOp
|
||
|
|
, ForwardOp
|
||
|
|
> nested_chunk;
|
||
|
|
|
||
|
|
AUX778076_FIRST_BACKWARD_STATE_TYPEDEF(BOOST_MPL_LIMIT_UNROLLING)
|
||
|
|
|
||
|
|
BOOST_MPL_PP_REPEAT(
|
||
|
|
BOOST_MPL_LIMIT_UNROLLING
|
||
|
|
, AUX778076_ITER_FOLD_BACKWARD_STEP
|
||
|
|
, BOOST_MPL_LIMIT_UNROLLING
|
||
|
|
)
|
||
|
|
|
||
|
|
typedef bkwd_state0 state;
|
||
|
|
typedef typename nested_chunk::iterator iterator;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
// fallback implementation for sequences of unknown size
|
||
|
|
template<
|
||
|
|
typename First
|
||
|
|
, typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_step);
|
||
|
|
|
||
|
|
template<
|
||
|
|
typename Last
|
||
|
|
, typename State
|
||
|
|
>
|
||
|
|
struct BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_null_step)
|
||
|
|
{
|
||
|
|
typedef Last iterator;
|
||
|
|
typedef State state;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<>
|
||
|
|
struct AUX778076_FOLD_CHUNK_NAME<-1>
|
||
|
|
{
|
||
|
|
template<
|
||
|
|
typename First
|
||
|
|
, typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct result_
|
||
|
|
{
|
||
|
|
typedef typename if_<
|
||
|
|
typename is_same<First,Last>::type
|
||
|
|
, BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_null_step)<Last,State>
|
||
|
|
, BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_step)<First,Last,State,BackwardOp,ForwardOp>
|
||
|
|
>::type res_;
|
||
|
|
|
||
|
|
typedef typename res_::state state;
|
||
|
|
typedef typename res_::iterator iterator;
|
||
|
|
};
|
||
|
|
|
||
|
|
#if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
|
||
|
|
/// ETI workaround
|
||
|
|
template<> struct result_<int,int,int,int,int>
|
||
|
|
{
|
||
|
|
typedef int state;
|
||
|
|
typedef int iterator;
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
template<
|
||
|
|
typename First
|
||
|
|
, typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_step)
|
||
|
|
{
|
||
|
|
typedef AUX778076_FOLD_CHUNK_NAME<-1>::template result_<
|
||
|
|
typename mpl::next<First>::type
|
||
|
|
, Last
|
||
|
|
, typename apply2<ForwardOp,State,AUX778076_FOLD_IMPL_OP(First)>::type
|
||
|
|
, BackwardOp
|
||
|
|
, ForwardOp
|
||
|
|
> nested_step;
|
||
|
|
|
||
|
|
typedef typename apply2<
|
||
|
|
BackwardOp
|
||
|
|
, typename nested_step::state
|
||
|
|
, AUX778076_FOLD_IMPL_OP(First)
|
||
|
|
>::type state;
|
||
|
|
|
||
|
|
typedef typename nested_step::iterator iterator;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<
|
||
|
|
BOOST_MPL_AUX_NTTP_DECL(long, N)
|
||
|
|
, typename First
|
||
|
|
, typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct AUX778076_FOLD_IMPL_NAME
|
||
|
|
: AUX778076_FOLD_CHUNK_NAME<N>
|
||
|
|
::template result_<First,Last,State,BackwardOp,ForwardOp>
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
||
|
|
|
||
|
|
}}}
|
||
|
|
|
||
|
|
# undef AUX778076_FIRST_BACKWARD_STATE_TYPEDEF
|
||
|
|
# undef AUX778076_ITER_FOLD_BACKWARD_STEP
|
||
|
|
# undef AUX778076_ITER_FOLD_BACKWARD_STEP_FUNC
|
||
|
|
# undef AUX778076_ITER_FOLD_FORWARD_STEP
|
||
|
|
|
||
|
|
#undef AUX778076_FOLD_IMPL_OP
|
||
|
|
#undef AUX778076_FOLD_IMPL_NAME_PREFIX
|
||
|
|
|
||
|
|
///// iteration
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
# define n_ BOOST_PP_FRAME_ITERATION(1)
|
||
|
|
|
||
|
|
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
|
||
|
|
&& !defined(BOOST_MPL_CFG_NO_NONTYPE_TEMPLATE_PARTIAL_SPEC)
|
||
|
|
|
||
|
|
template<
|
||
|
|
typename First
|
||
|
|
, typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct AUX778076_FOLD_IMPL_NAME<n_,First,Last,State,BackwardOp,ForwardOp>
|
||
|
|
{
|
||
|
|
typedef First iter0;
|
||
|
|
typedef State fwd_state0;
|
||
|
|
|
||
|
|
BOOST_MPL_PP_REPEAT(
|
||
|
|
n_
|
||
|
|
, AUX778076_ITER_FOLD_FORWARD_STEP
|
||
|
|
, unused
|
||
|
|
)
|
||
|
|
|
||
|
|
typedef BOOST_PP_CAT(fwd_state,n_) BOOST_PP_CAT(bkwd_state,n_);
|
||
|
|
|
||
|
|
BOOST_MPL_PP_REPEAT(
|
||
|
|
n_
|
||
|
|
, AUX778076_ITER_FOLD_BACKWARD_STEP
|
||
|
|
, n_
|
||
|
|
)
|
||
|
|
|
||
|
|
typedef bkwd_state0 state;
|
||
|
|
typedef BOOST_PP_CAT(iter,n_) iterator;
|
||
|
|
};
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
template<> struct AUX778076_FOLD_CHUNK_NAME<n_>
|
||
|
|
{
|
||
|
|
template<
|
||
|
|
typename First
|
||
|
|
, typename Last
|
||
|
|
, typename State
|
||
|
|
, typename BackwardOp
|
||
|
|
, typename ForwardOp
|
||
|
|
>
|
||
|
|
struct result_
|
||
|
|
{
|
||
|
|
typedef First iter0;
|
||
|
|
typedef State fwd_state0;
|
||
|
|
|
||
|
|
BOOST_MPL_PP_REPEAT(
|
||
|
|
n_
|
||
|
|
, AUX778076_ITER_FOLD_FORWARD_STEP
|
||
|
|
, unused
|
||
|
|
)
|
||
|
|
|
||
|
|
typedef BOOST_PP_CAT(fwd_state,n_) BOOST_PP_CAT(bkwd_state,n_);
|
||
|
|
|
||
|
|
BOOST_MPL_PP_REPEAT(
|
||
|
|
n_
|
||
|
|
, AUX778076_ITER_FOLD_BACKWARD_STEP
|
||
|
|
, n_
|
||
|
|
)
|
||
|
|
|
||
|
|
typedef bkwd_state0 state;
|
||
|
|
typedef BOOST_PP_CAT(iter,n_) iterator;
|
||
|
|
};
|
||
|
|
|
||
|
|
#if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
|
||
|
|
/// ETI workaround
|
||
|
|
template<> struct result_<int,int,int,int,int>
|
||
|
|
{
|
||
|
|
typedef int state;
|
||
|
|
typedef int iterator;
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
||
|
|
|
||
|
|
# undef n_
|
||
|
|
|
||
|
|
#endif // BOOST_PP_IS_ITERATING
|