68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2006 Dan Marsden
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(BOOST_FUSION_DEREF_IMPL_20060222_1952)
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#define BOOST_FUSION_DEREF_IMPL_20060222_1952
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#include <boost/static_assert.hpp>
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#include <boost/type_traits/is_const.hpp>
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#include <boost/mpl/if.hpp>
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#include <string>
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namespace example
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{
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struct example_struct_iterator_tag;
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template<typename Struct, int Pos>
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struct example_struct_iterator;
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}
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namespace boost { namespace fusion {
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namespace extension
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{
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template<typename Tag>
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struct deref_impl;
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template<>
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struct deref_impl<example::example_struct_iterator_tag>
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{
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template<typename Iterator>
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struct apply;
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template<typename Struct>
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struct apply<example::example_struct_iterator<Struct, 0> >
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{
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typedef typename mpl::if_<
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is_const<Struct>, std::string const&, std::string&>::type type;
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static type
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call(example::example_struct_iterator<Struct, 0> const& it)
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{
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return it.struct_.name;
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}
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};
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template<typename Struct>
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struct apply<example::example_struct_iterator<Struct, 1> >
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{
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typedef typename mpl::if_<
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is_const<Struct>, int const&, int&>::type type;
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static type
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call(example::example_struct_iterator<Struct, 1> const& it)
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{
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return it.struct_.age;
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}
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};
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};
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}
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}}
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#endif
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