#ifndef BOOST_MPL_COUNT_IF_HPP_INCLUDED | |
#define BOOST_MPL_COUNT_IF_HPP_INCLUDED | |
// Copyright Aleksey Gurtovoy 2000-2002 | |
// | |
// 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: count_if.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/fold.hpp> | |
#include <boost/mpl/next.hpp> | |
#include <boost/mpl/integral_c.hpp> | |
#include <boost/mpl/identity.hpp> | |
#include <boost/mpl/eval_if.hpp> | |
#include <boost/mpl/apply.hpp> | |
#include <boost/mpl/aux_/msvc_eti_base.hpp> | |
#include <boost/mpl/aux_/na_spec.hpp> | |
#include <boost/mpl/aux_/lambda_support.hpp> | |
#include <boost/mpl/aux_/config/forwarding.hpp> | |
namespace boost { namespace mpl { | |
namespace aux { | |
template< typename Predicate > | |
struct next_if | |
{ | |
template< | |
typename N | |
, typename T | |
> | |
struct apply | |
#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING) | |
: eval_if< | |
typename apply1<Predicate,T>::type | |
, next<N> | |
, identity<N> | |
> | |
{ | |
#else | |
{ | |
typedef typename eval_if< | |
typename apply1<Predicate,T>::type | |
, next<N> | |
, identity<N> | |
>::type type; | |
#endif | |
}; | |
}; | |
} // namespace aux | |
template< | |
typename BOOST_MPL_AUX_NA_PARAM(Sequence) | |
, typename BOOST_MPL_AUX_NA_PARAM(Predicate) | |
> | |
struct count_if | |
: aux::msvc_eti_base< typename fold< | |
Sequence | |
, integral_c<unsigned long,0> | |
, protect< aux::next_if<Predicate> > | |
>::type > | |
{ | |
BOOST_MPL_AUX_LAMBDA_SUPPORT(2,count_if,(Sequence,Predicate)) | |
}; | |
BOOST_MPL_AUX_NA_SPEC(2, count_if) | |
}} | |
#endif // BOOST_MPL_COUNT_IF_HPP_INCLUDED |