| /*============================================================================= |
| Copyright (c) 2001-2011 Hartmut Kaiser |
| |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| ==============================================================================*/ |
| #if !defined(BOOST_SPIRIT_HANDLES_CONTAINER_DEC_18_2010_0920AM) |
| #define BOOST_SPIRIT_HANDLES_CONTAINER_DEC_18_2010_0920AM |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| #include <boost/spirit/home/support/attributes_fwd.hpp> |
| #include <boost/mpl/bool.hpp> |
| #include <boost/mpl/or.hpp> |
| #include <boost/mpl/not.hpp> |
| #include <boost/mpl/find_if.hpp> |
| #include <boost/type_traits/is_same.hpp> |
| |
| namespace boost { namespace spirit { namespace traits |
| { |
| // Finds out whether a component handles container attributes intrinsically |
| // (or whether container attributes need to be split up separately). |
| template <typename T, typename Attribute, typename Context |
| , typename Iterator, typename Enable> |
| struct handles_container : mpl::false_ {}; |
| |
| template <typename Subject, typename Attribute, typename Context |
| , typename Iterator> |
| struct unary_handles_container |
| : handles_container<Subject, Attribute, Context, Iterator> {}; |
| |
| template <typename Left, typename Right, typename Attribute |
| , typename Context, typename Iterator> |
| struct binary_handles_container |
| : mpl::or_< |
| handles_container<Left, Attribute, Context, Iterator> |
| , handles_container<Right, Attribute, Context, Iterator> > |
| {}; |
| |
| template <typename Elements, typename Attribute, typename Context |
| , typename Iterator> |
| struct nary_handles_container |
| : mpl::not_< |
| is_same< |
| typename mpl::find_if< |
| Elements, handles_container<mpl::_, Attribute |
| , Context, Iterator> |
| >::type |
| , typename mpl::end<Elements>::type> > |
| {}; |
| }}} |
| |
| #endif |