| /*============================================================================= |
| 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_DEREF_IMPL_20060222_1952) |
| #define BOOST_FUSION_DEREF_IMPL_20060222_1952 |
| |
| #include <boost/static_assert.hpp> |
| #include <boost/type_traits/is_const.hpp> |
| #include <boost/mpl/if.hpp> |
| |
| #include <string> |
| |
| 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 deref_impl; |
| |
| template<> |
| struct deref_impl<example::example_struct_iterator_tag> |
| { |
| template<typename Iterator> |
| struct apply; |
| |
| template<typename Struct> |
| struct apply<example::example_struct_iterator<Struct, 0> > |
| { |
| typedef typename mpl::if_< |
| is_const<Struct>, std::string const&, std::string&>::type type; |
| |
| static type |
| call(example::example_struct_iterator<Struct, 0> const& it) |
| { |
| return it.struct_.name; |
| } |
| }; |
| |
| template<typename Struct> |
| struct apply<example::example_struct_iterator<Struct, 1> > |
| { |
| typedef typename mpl::if_< |
| is_const<Struct>, int const&, int&>::type type; |
| |
| static type |
| call(example::example_struct_iterator<Struct, 1> const& it) |
| { |
| return it.struct_.age; |
| } |
| }; |
| }; |
| } |
| }} |
| |
| #endif |