/*============================================================================= | |
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 Category, 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 typename Sequence::category category; | |
typedef filter_iterator<category, first_type, last_type, pred_type> type; | |
static type | |
call(Sequence& s) | |
{ | |
return type(s.first()); | |
} | |
}; | |
}; | |
} | |
}} | |
#endif | |