49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
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/*==============================================================================
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Copyright (c) 2005-2008 Hartmut Kaiser
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Copyright (c) 2005-2010 Joel de Guzman
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Copyright (c) 2010 Thomas Heller
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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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#ifndef BOOST_PHOENIX_FUSION_AT_HPP
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#define BOOST_PHOENIX_FUSION_AT_HPP
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#include <boost/phoenix/core/limits.hpp>
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#include <boost/fusion/sequence/intrinsic/at_c.hpp>
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#include <boost/phoenix/core/expression.hpp>
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#include <boost/phoenix/core/meta_grammar.hpp>
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#include <boost/type_traits/remove_reference.hpp>
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BOOST_PHOENIX_DEFINE_EXPRESSION(
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(boost)(phoenix)(at_c)
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, (proto::terminal<proto::_>)
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(meta_grammar)
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)
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namespace boost { namespace phoenix
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{
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template <typename Dummy>
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struct default_actions::when<rule::at_c, Dummy>
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: proto::call<
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proto::functional::at(
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evaluator(proto::_child_c<1>)
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, proto::_value(proto::_child_c<0>)
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)
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>
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{};
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template <int N, typename Tuple>
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inline
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typename expression::at_c<mpl::int_<N>, Tuple>::type const
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at_c(Tuple const& tuple)
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{
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return
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expression::
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at_c<mpl::int_<N>, Tuple>::
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make(mpl::int_<N>(), tuple);
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}
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}}
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#endif
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