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55 lines
2.0 KiB
55 lines
2.0 KiB
/*============================================================================= |
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Copyright (c) 2001-2011 Hartmut Kaiser |
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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_SPIRIT_HANDLES_CONTAINER_DEC_18_2010_0920AM) |
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#define BOOST_SPIRIT_HANDLES_CONTAINER_DEC_18_2010_0920AM |
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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/spirit/home/support/attributes_fwd.hpp> |
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#include <boost/mpl/bool.hpp> |
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#include <boost/mpl/or.hpp> |
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#include <boost/mpl/not.hpp> |
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#include <boost/mpl/find_if.hpp> |
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#include <boost/type_traits/is_same.hpp> |
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namespace boost { namespace spirit { namespace traits |
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{ |
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// Finds out whether a component handles container attributes intrinsically |
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// (or whether container attributes need to be split up separately). |
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template <typename T, typename Attribute, typename Context |
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, typename Iterator, typename Enable> |
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struct handles_container : mpl::false_ {}; |
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template <typename Subject, typename Attribute, typename Context |
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, typename Iterator> |
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struct unary_handles_container |
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: handles_container<Subject, Attribute, Context, Iterator> {}; |
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template <typename Left, typename Right, typename Attribute |
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, typename Context, typename Iterator> |
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struct binary_handles_container |
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: mpl::or_< |
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handles_container<Left, Attribute, Context, Iterator> |
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, handles_container<Right, Attribute, Context, Iterator> > |
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{}; |
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template <typename Elements, typename Attribute, typename Context |
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, typename Iterator> |
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struct nary_handles_container |
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: mpl::not_< |
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is_same< |
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typename mpl::find_if< |
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Elements, handles_container<mpl::_, Attribute |
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, Context, Iterator> |
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>::type |
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, typename mpl::end<Elements>::type> > |
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{}; |
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}}} |
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#endif
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