| |
| #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 |