forked from boostorg/fusion
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
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/*=============================================================================
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Copyright (c) 2001-2009 Joel de Guzman
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Copyright (c) 2005-2006 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_AT_IMPL_OCTOBER_4_2009_920PM)
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#define BOOST_FUSION_AT_IMPL_OCTOBER_4_2009_920PM
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#include <boost/fusion/support/detail/access.hpp>
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#include <boost/mpl/assert.hpp>
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#include <boost/mpl/int.hpp>
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namespace boost { namespace fusion
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{
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struct class_tag;
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namespace extension
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{
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template<typename T>
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struct at_impl;
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template <typename Class, int N>
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struct class_member;
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template <typename Class>
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struct class_size;
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template <>
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struct at_impl<class_tag>
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{
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template <typename Sequence, typename N>
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struct apply
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{
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static int const n_value = N::value;
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BOOST_MPL_ASSERT_RELATION(
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n_value, <=, extension::class_size<Sequence>::value);
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typedef typename
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extension::class_member<Sequence, N::value>
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element;
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typedef typename
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mpl::if_<
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is_const<Sequence>
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, typename class_member<Sequence, N::value>::get_type
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, typename class_member<Sequence, N::value>::proxy
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>::type
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type;
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static type
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call(Sequence& seq)
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{
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return extension::
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class_member<Sequence, N::value>::call(seq);
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}
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//~ static typename class_member<Sequence, N::value>::get_type
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//~ call(Sequence const& seq)
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//~ {
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//~ return extension::
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//~ class_member<Sequence, N::value>::call(seq);
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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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