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/*=============================================================================
Copyright (c) 2001-2011 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
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