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