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// 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: 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/workaround.hpp>
# include <boost/mpl/aux_/config/ctps.hpp>
# include <boost/mpl/aux_/nttp_decl.hpp>
# include <boost/mpl/aux_/config/eti.hpp>
# include <boost/preprocessor/iterate.hpp>
# include <boost/preprocessor/dec.hpp>
# include <boost/preprocessor/cat.hpp>
// local macros, #undef-ined at the end of the header
# define AUX778076_ITER_FOLD_STEP(unused, i, unused2) \
typedef typename apply2< \
ForwardOp \
, BOOST_PP_CAT(state,i) \
, AUX778076_FOLD_IMPL_OP(BOOST_PP_CAT(iter,i)) \
>::type BOOST_PP_CAT(state,BOOST_PP_INC(i)); \
typedef typename mpl::next<BOOST_PP_CAT(iter,i)>::type \
BOOST_PP_CAT(iter,BOOST_PP_INC(i)); \
/**/
# 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(int, N)
, typename First
, typename Last
, typename State
, typename ForwardOp
>
struct AUX778076_FOLD_IMPL_NAME;
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
# if !BOOST_WORKAROUND(__BORLANDC__, < 0x600)
# define BOOST_PP_ITERATION_PARAMS_1 \
(3,(0, BOOST_MPL_LIMIT_UNROLLING, <boost/mpl/aux_/fold_impl_body.hpp>))
# include BOOST_PP_ITERATE()
// implementation for N that exceeds BOOST_MPL_LIMIT_UNROLLING
template<
BOOST_MPL_AUX_NTTP_DECL(int, N)
, typename First
, typename Last
, typename State
, typename ForwardOp
>
struct AUX778076_FOLD_IMPL_NAME
{
typedef AUX778076_FOLD_IMPL_NAME<
BOOST_MPL_LIMIT_UNROLLING
, First
, Last
, State
, ForwardOp
> chunk_;
typedef AUX778076_FOLD_IMPL_NAME<
( (N - BOOST_MPL_LIMIT_UNROLLING) < 0 ? 0 : N - BOOST_MPL_LIMIT_UNROLLING )
, typename chunk_::iterator
, Last
, typename chunk_::state
, ForwardOp
> res_;
typedef typename res_::state state;
typedef typename res_::iterator iterator;
};
// fallback implementation for sequences of unknown size
template<
typename First
, typename Last
, typename State
, typename ForwardOp
>
struct AUX778076_FOLD_IMPL_NAME<-1,First,Last,State,ForwardOp>
: AUX778076_FOLD_IMPL_NAME<
-1
, typename mpl::next<First>::type
, Last
, typename apply2<ForwardOp,State,AUX778076_FOLD_IMPL_OP(First)>::type
, ForwardOp
>
{
};
template<
typename Last
, typename State
, typename ForwardOp
>
struct AUX778076_FOLD_IMPL_NAME<-1,Last,Last,State,ForwardOp>
{
typedef State state;
typedef Last iterator;
};
# else // BOOST_WORKAROUND(__BORLANDC__, < 0x600)
// Borland have some serious problems with the unrolled version, so
// we always use a basic implementation
template<
BOOST_MPL_AUX_NTTP_DECL(int, N)
, typename First
, typename Last
, typename State
, typename ForwardOp
>
struct AUX778076_FOLD_IMPL_NAME
{
typedef AUX778076_FOLD_IMPL_NAME<
-1
, typename mpl::next<First>::type
, Last
, typename apply2<ForwardOp,State,AUX778076_FOLD_IMPL_OP(First)>::type
, ForwardOp
> res_;
typedef typename res_::state state;
typedef typename res_::iterator iterator;
typedef state type;
};
template<
BOOST_MPL_AUX_NTTP_DECL(int, N)
, typename Last
, typename State
, typename ForwardOp
>
struct AUX778076_FOLD_IMPL_NAME<N,Last,Last,State,ForwardOp >
{
typedef State state;
typedef Last iterator;
typedef state type;
};
# endif // BOOST_WORKAROUND(__BORLANDC__, < 0x600)
#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template< BOOST_MPL_AUX_NTTP_DECL(int, N) >
struct AUX778076_FOLD_CHUNK_NAME;
# define BOOST_PP_ITERATION_PARAMS_1 \
(3,(0, BOOST_MPL_LIMIT_UNROLLING, <boost/mpl/aux_/fold_impl_body.hpp>))
# include BOOST_PP_ITERATE()
// implementation for N that exceeds BOOST_MPL_LIMIT_UNROLLING
template< BOOST_MPL_AUX_NTTP_DECL(int, N) >
struct AUX778076_FOLD_CHUNK_NAME
{
template<
typename First
, typename Last
, typename State
, typename ForwardOp
>
struct result_
{
typedef AUX778076_FOLD_IMPL_NAME<
BOOST_MPL_LIMIT_UNROLLING
, First
, Last
, State
, ForwardOp
> chunk_;
typedef AUX778076_FOLD_IMPL_NAME<
( (N - BOOST_MPL_LIMIT_UNROLLING) < 0 ? 0 : N - BOOST_MPL_LIMIT_UNROLLING )
, typename chunk_::iterator
, Last
, typename chunk_::state
, ForwardOp
> res_;
typedef typename res_::state state;
typedef typename res_::iterator iterator;
};
};
// fallback implementation for sequences of unknown size
template<
typename First
, typename Last
, typename State
, 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 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,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>
{
typedef int state;
typedef int iterator;
};
#endif
};
template<
typename First
, typename Last
, typename State
, typename ForwardOp
>
struct BOOST_PP_CAT(AUX778076_FOLD_IMPL_NAME_PREFIX,_step)
{
// can't inherit here - it breaks MSVC 7.0
typedef AUX778076_FOLD_CHUNK_NAME<-1>::template result_<
typename mpl::next<First>::type
, Last
, typename apply2<ForwardOp,State,AUX778076_FOLD_IMPL_OP(First)>::type
, ForwardOp
> chunk_;
typedef typename chunk_::state state;
typedef typename chunk_::iterator iterator;
};
template<
BOOST_MPL_AUX_NTTP_DECL(int, N)
, typename First
, typename Last
, typename State
, typename ForwardOp
>
struct AUX778076_FOLD_IMPL_NAME
: AUX778076_FOLD_CHUNK_NAME<N>
::template result_<First,Last,State,ForwardOp>
{
};
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
}}}
# undef AUX778076_FOLD_IMPL_NAME
# undef AUX778076_FOLD_CHUNK_NAME
# undef AUX778076_ITER_FOLD_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)
template<
typename First
, typename Last
, typename State
, typename ForwardOp
>
struct AUX778076_FOLD_IMPL_NAME<n_,First,Last,State,ForwardOp>
{
typedef First iter0;
typedef State state0;
BOOST_MPL_PP_REPEAT(n_, AUX778076_ITER_FOLD_STEP, unused)
typedef BOOST_PP_CAT(state,n_) state;
typedef BOOST_PP_CAT(iter,n_) iterator;
};
#else
template<> struct AUX778076_FOLD_CHUNK_NAME<n_>
{
template<
typename First
, typename Last
, typename State
, typename ForwardOp
>
struct result_
{
typedef First iter0;
typedef State state0;
BOOST_MPL_PP_REPEAT(n_, AUX778076_ITER_FOLD_STEP, unused)
typedef BOOST_PP_CAT(state,n_) 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>
{
typedef int state;
typedef int iterator;
};
#endif
};
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
# undef n_
#endif // BOOST_PP_IS_ITERATING
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Swift