| /*============================================================================= |
| Copyright (c) 2001-2010 Joel de Guzman |
| |
| 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(SPIRIT_SEQUENCE_BASE_ID_MAR_15_2009_1243PM) |
| #define SPIRIT_SEQUENCE_BASE_ID_MAR_15_2009_1243PM |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| #include <boost/mpl/has_xxx.hpp> |
| #include <boost/utility/enable_if.hpp> |
| #include <boost/spirit/home/support/attributes.hpp> |
| |
| namespace boost { namespace spirit { namespace traits |
| { |
| namespace detail |
| { |
| BOOST_MPL_HAS_XXX_TRAIT_DEF(sequence_base_id) |
| } |
| |
| // We specialize this for sequences (see support/attributes.hpp). |
| // For sequences, we only wrap the attribute in a tuple IFF |
| // it is not already a fusion tuple. |
| // |
| // Note: in the comment above, "sequence" is a spirit sequence |
| // component (parser or generator), and a tuple is a fusion sequence |
| // (to avoid terminology confusion). |
| template <typename Derived, typename Attribute> |
| struct pass_attribute<Derived, Attribute, |
| typename enable_if<detail::has_sequence_base_id<Derived> >::type> |
| : wrap_if_not_tuple<Attribute> {}; |
| |
| }}} |
| |
| #endif |