/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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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_SPIRIT_SUPPORT_SEQUENCE_BASE_ID_HPP
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#define BOOST_SPIRIT_SUPPORT_SEQUENCE_BASE_ID_HPP
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/mpl/has_xxx.hpp>
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#include <boost/utility/enable_if.hpp>
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#include <boost/spirit/home/support/attributes.hpp>
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namespace boost { namespace spirit { namespace traits
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{
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namespace detail
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{
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BOOST_MPL_HAS_XXX_TRAIT_DEF(sequence_base_id)
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}
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// We specialize this for sequences (see support/attributes.hpp).
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// For sequences, we only wrap the attribute in a tuple IFF
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// it is not already a fusion tuple.
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//
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// Note: in the comment above, "sequence" is a spirit sequence
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// component (parser or generator), and a tuple is a fusion sequence
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// (to avoid terminology confusion).
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template <typename Derived, typename Attribute>
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struct pass_attribute<Derived, Attribute,
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typename enable_if<detail::has_sequence_base_id<Derived> >::type>
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: wrap_if_not_tuple<Attribute> {};
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}}}
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#endif
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