| [12] | 1 | |
|---|
| 2 | #ifndef BOOST_MPL_COUNT_IF_HPP_INCLUDED |
|---|
| 3 | #define BOOST_MPL_COUNT_IF_HPP_INCLUDED |
|---|
| 4 | |
|---|
| 5 | // Copyright Aleksey Gurtovoy 2000-2002 |
|---|
| 6 | // |
|---|
| 7 | // Distributed under the Boost Software License, Version 1.0. |
|---|
| 8 | // (See accompanying file LICENSE_1_0.txt or copy at |
|---|
| 9 | // http://www.boost.org/LICENSE_1_0.txt) |
|---|
| 10 | // |
|---|
| 11 | // See http://www.boost.org/libs/mpl for documentation. |
|---|
| 12 | |
|---|
| 13 | // $Source: /cvsroot/boost/boost/boost/mpl/count_if.hpp,v $ |
|---|
| 14 | // $Date: 2004/09/02 15:40:41 $ |
|---|
| 15 | // $Revision: 1.5 $ |
|---|
| 16 | |
|---|
| 17 | #include <boost/mpl/fold.hpp> |
|---|
| 18 | #include <boost/mpl/next.hpp> |
|---|
| 19 | #include <boost/mpl/integral_c.hpp> |
|---|
| 20 | #include <boost/mpl/identity.hpp> |
|---|
| 21 | #include <boost/mpl/eval_if.hpp> |
|---|
| 22 | #include <boost/mpl/apply.hpp> |
|---|
| 23 | #include <boost/mpl/aux_/msvc_eti_base.hpp> |
|---|
| 24 | #include <boost/mpl/aux_/na_spec.hpp> |
|---|
| 25 | #include <boost/mpl/aux_/lambda_support.hpp> |
|---|
| 26 | #include <boost/mpl/aux_/config/forwarding.hpp> |
|---|
| 27 | |
|---|
| 28 | namespace boost { namespace mpl { |
|---|
| 29 | |
|---|
| 30 | namespace aux { |
|---|
| 31 | |
|---|
| 32 | template< typename Predicate > |
|---|
| 33 | struct next_if |
|---|
| 34 | { |
|---|
| 35 | template< |
|---|
| 36 | typename N |
|---|
| 37 | , typename T |
|---|
| 38 | > |
|---|
| 39 | struct apply |
|---|
| 40 | #if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING) |
|---|
| 41 | : eval_if< |
|---|
| 42 | typename apply1<Predicate,T>::type |
|---|
| 43 | , next<N> |
|---|
| 44 | , identity<N> |
|---|
| 45 | > |
|---|
| 46 | { |
|---|
| 47 | #else |
|---|
| 48 | { |
|---|
| 49 | typedef typename eval_if< |
|---|
| 50 | typename apply1<Predicate,T>::type |
|---|
| 51 | , next<N> |
|---|
| 52 | , identity<N> |
|---|
| 53 | >::type type; |
|---|
| 54 | #endif |
|---|
| 55 | }; |
|---|
| 56 | }; |
|---|
| 57 | |
|---|
| 58 | } // namespace aux |
|---|
| 59 | |
|---|
| 60 | |
|---|
| 61 | template< |
|---|
| 62 | typename BOOST_MPL_AUX_NA_PARAM(Sequence) |
|---|
| 63 | , typename BOOST_MPL_AUX_NA_PARAM(Predicate) |
|---|
| 64 | > |
|---|
| 65 | struct count_if |
|---|
| 66 | : aux::msvc_eti_base< typename fold< |
|---|
| 67 | Sequence |
|---|
| 68 | , integral_c<unsigned long,0> |
|---|
| 69 | , protect< aux::next_if<Predicate> > |
|---|
| 70 | >::type > |
|---|
| 71 | { |
|---|
| 72 | BOOST_MPL_AUX_LAMBDA_SUPPORT(2,count_if,(Sequence,Predicate)) |
|---|
| 73 | }; |
|---|
| 74 | |
|---|
| 75 | BOOST_MPL_AUX_NA_SPEC(2, count_if) |
|---|
| 76 | |
|---|
| 77 | }} |
|---|
| 78 | |
|---|
| 79 | #endif // BOOST_MPL_COUNT_IF_HPP_INCLUDED |
|---|
