projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*============================================================================= |
| 2 | Copyright (c) 2001-2011 Hartmut Kaiser | |
| 3 | ||
| 4 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 6 | ==============================================================================*/ | |
| 7 | #if !defined(BOOST_SPIRIT_HAS_SEMANTIC_ACTION_SEP_20_2009_0626PM) | |
| 8 | #define BOOST_SPIRIT_HAS_SEMANTIC_ACTION_SEP_20_2009_0626PM | |
| 9 | ||
| 10 | #if defined(_MSC_VER) | |
| 11 | #pragma once | |
| 12 | #endif | |
| 13 | ||
| 14 | #include <boost/mpl/bool.hpp> | |
| 15 | #include <boost/mpl/or.hpp> | |
| 16 | #include <boost/mpl/not.hpp> | |
| 17 | #include <boost/mpl/find_if.hpp> | |
| 18 | #include <boost/type_traits/is_same.hpp> | |
| 19 | ||
| 20 | namespace boost { namespace spirit { namespace traits | |
| 21 | { | |
| 22 | // finding out, whether a component contains a semantic action | |
| 23 | template <typename T, typename Enable = void> | |
| 24 | struct has_semantic_action | |
| 25 | : mpl::false_ {}; | |
| 26 | ||
| 27 | template <typename Subject> | |
| 28 | struct unary_has_semantic_action | |
| 29 | : has_semantic_action<Subject> {}; | |
| 30 | ||
| 31 | template <typename Left, typename Right> | |
| 32 | struct binary_has_semantic_action | |
| 33 | : mpl::or_<has_semantic_action<Left>, has_semantic_action<Right> > {}; | |
| 34 | ||
| 35 | template <typename Elements> | |
| 36 | struct nary_has_semantic_action | |
| 37 | : mpl::not_< | |
| 38 | is_same< | |
| 39 | typename mpl::find_if< | |
| 40 | Elements, has_semantic_action<mpl::_> | |
| 41 | >::type | |
| 42 | , typename mpl::end<Elements>::type | |
| 43 | > | |
| 44 | > {}; | |
| 45 | }}} | |
| 46 | ||
| 47 | #endif |