47 lines
1.3 KiB
C++
47 lines
1.3 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_PRIOR_IMPL_20060222_1944)
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#define BOOST_FUSION_PRIOR_IMPL_20060222_1944
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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 prior_impl;
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template<>
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struct prior_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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{
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typedef typename Iterator::struct_type struct_type;
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typedef typename Iterator::index index;
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typedef example::example_struct_iterator<struct_type, index::value - 1> type;
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static type
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call(Iterator const& i)
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{
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return type(i.struct_);
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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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