You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
3.0 KiB
118 lines
3.0 KiB
|
|
#ifndef BOOST_MPL_ITER_FOLD_IF_HPP_INCLUDED
|
|
#define BOOST_MPL_ITER_FOLD_IF_HPP_INCLUDED
|
|
|
|
// Copyright Aleksey Gurtovoy 2003-2004
|
|
// Copyright Eric Friedman 2003
|
|
//
|
|
// 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.
|
|
|
|
// $Id$
|
|
// $Date$
|
|
// $Revision$
|
|
|
|
#include <boost/mpl/begin_end.hpp>
|
|
#include <boost/mpl/logical.hpp>
|
|
#include <boost/mpl/always.hpp>
|
|
#include <boost/mpl/eval_if.hpp>
|
|
#include <boost/mpl/if.hpp>
|
|
#include <boost/mpl/pair.hpp>
|
|
#include <boost/mpl/apply.hpp>
|
|
#include <boost/mpl/aux_/iter_fold_if_impl.hpp>
|
|
#include <boost/mpl/aux_/na_spec.hpp>
|
|
#include <boost/mpl/aux_/lambda_support.hpp>
|
|
#include <boost/mpl/aux_/config/forwarding.hpp>
|
|
#include <boost/mpl/aux_/config/workaround.hpp>
|
|
|
|
#include <boost/type_traits/is_same.hpp>
|
|
|
|
namespace boost { namespace mpl {
|
|
|
|
namespace aux {
|
|
|
|
template< typename Predicate, typename LastIterator >
|
|
struct iter_fold_if_pred
|
|
{
|
|
template< typename State, typename Iterator > struct apply
|
|
#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
|
|
: and_<
|
|
not_< is_same<Iterator,LastIterator> >
|
|
, apply1<Predicate,Iterator>
|
|
>
|
|
{
|
|
#else
|
|
{
|
|
typedef and_<
|
|
not_< is_same<Iterator,LastIterator> >
|
|
, apply1<Predicate,Iterator>
|
|
> type;
|
|
#endif
|
|
};
|
|
};
|
|
|
|
} // namespace aux
|
|
|
|
template<
|
|
typename BOOST_MPL_AUX_NA_PARAM(Sequence)
|
|
, typename BOOST_MPL_AUX_NA_PARAM(State)
|
|
, typename BOOST_MPL_AUX_NA_PARAM(ForwardOp)
|
|
, typename BOOST_MPL_AUX_NA_PARAM(ForwardPredicate)
|
|
, typename BOOST_MPL_AUX_NA_PARAM(BackwardOp)
|
|
, typename BOOST_MPL_AUX_NA_PARAM(BackwardPredicate)
|
|
>
|
|
struct iter_fold_if
|
|
{
|
|
|
|
typedef typename begin<Sequence>::type first_;
|
|
typedef typename end<Sequence>::type last_;
|
|
|
|
typedef typename eval_if<
|
|
is_na<BackwardPredicate>
|
|
, if_< is_na<BackwardOp>, always<false_>, always<true_> >
|
|
, identity<BackwardPredicate>
|
|
>::type backward_pred_;
|
|
|
|
// cwpro8 doesn't like 'cut-off' type here (use typedef instead)
|
|
#if !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) && !BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600))
|
|
struct result_ :
|
|
#else
|
|
typedef
|
|
#endif
|
|
aux::iter_fold_if_impl<
|
|
first_
|
|
, State
|
|
, ForwardOp
|
|
, protect< aux::iter_fold_if_pred< ForwardPredicate,last_ > >
|
|
, BackwardOp
|
|
, backward_pred_
|
|
>
|
|
#if !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) && !BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600))
|
|
{ };
|
|
#else
|
|
result_;
|
|
#endif
|
|
|
|
public:
|
|
|
|
typedef pair<
|
|
typename result_::state
|
|
, typename result_::iterator
|
|
> type;
|
|
|
|
BOOST_MPL_AUX_LAMBDA_SUPPORT(
|
|
6
|
|
, iter_fold_if
|
|
, (Sequence,State,ForwardOp,ForwardPredicate,BackwardOp,BackwardPredicate)
|
|
)
|
|
};
|
|
|
|
BOOST_MPL_AUX_NA_SPEC(6, iter_fold_if)
|
|
|
|
}}
|
|
|
|
#endif // BOOST_MPL_ITER_FOLD_IF_HPP_INCLUDED
|