support/traits/handles_container.hpp

0001 /*=============================================================================
0002     Copyright (c) 2001-2011 Hartmut Kaiser
0003     Copyright (c) 2013 Agustin Berge
0004
0005     Distributed under the Boost Software License, Version 1.0. (See accompanying
0006     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0007 ==============================================================================*/
0008 #if !defined(BOOST_SPIRIT_X3_HANDLES_CONTAINER_DEC_18_2010_0920AM)
0009 #define BOOST_SPIRIT_X3_HANDLES_CONTAINER_DEC_18_2010_0920AM
0010
0011 #include <boost/mpl/bool.hpp>
0012
0013 namespace boost { namespace spirit { namespace x3 { namespace traits
0014 {
0015     ///////////////////////////////////////////////////////////////////////////
0016     // Whether a component handles container attributes intrinsically
0017     // (or whether container attributes need to be split up separately).
0018     // By default, this gets the Component's handles_container nested value.
0019     // Components may specialize this if such a handles_container is not
0020     // readily available (e.g. expensive to compute at compile time).
0021     ///////////////////////////////////////////////////////////////////////////
0022     template <typename Component, typename Context, typename Enable = void>
0023     struct handles_container : mpl::bool_<Component::handles_container> {};
0024
0025 }}}}
0026
0027 #endif