| /*============================================================================= |
| Copyright (c) 2001-2006 Joel de Guzman |
| |
| 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) |
| ==============================================================================*/ |
| #if !defined(FUSION_BEGIN_IMPL_05062005_0903) |
| #define FUSION_BEGIN_IMPL_05062005_0903 |
| |
| namespace boost { namespace fusion |
| { |
| struct filter_view_tag; |
| |
| template <typename First, typename Last, typename Pred> |
| struct filter_iterator; |
| |
| namespace extension |
| { |
| template <typename Tag> |
| struct begin_impl; |
| |
| template <> |
| struct begin_impl<filter_view_tag> |
| { |
| template <typename Sequence> |
| struct apply |
| { |
| typedef typename Sequence::first_type first_type; |
| typedef typename Sequence::last_type last_type; |
| typedef typename Sequence::pred_type pred_type; |
| typedef filter_iterator<first_type, last_type, pred_type> type; |
| |
| static type |
| call(Sequence& s) |
| { |
| return type(s.first()); |
| } |
| }; |
| }; |
| } |
| }} |
| |
| #endif |
| |
| |