| /*============================================================================= |
| Copyright (c) 2001-2006 Joel de Guzman |
| Copyright (c) 2006 Dan Marsden |
| |
| 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(BOOST_FUSION_PRIOR_IMPL_20060222_1944) |
| #define BOOST_FUSION_PRIOR_IMPL_20060222_1944 |
| |
| namespace example |
| { |
| struct example_struct_iterator_tag; |
| |
| template<typename Struct, int Pos> |
| struct example_struct_iterator; |
| } |
| |
| namespace boost { namespace fusion { |
| |
| namespace extension |
| { |
| template<typename Tag> |
| struct prior_impl; |
| |
| template<> |
| struct prior_impl<example::example_struct_iterator_tag> |
| { |
| template<typename Iterator> |
| struct apply |
| { |
| typedef typename Iterator::struct_type struct_type; |
| typedef typename Iterator::index index; |
| typedef example::example_struct_iterator<struct_type, index::value - 1> type; |
| |
| static type |
| call(Iterator const& i) |
| { |
| return type(i.struct_); |
| } |
| }; |
| }; |
| } |
| }} |
| |
| #endif |