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/*=============================================================================
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_HAS_SEMANTIC_ACTION_SEP_20_2009_0626PM)
#define BOOST_SPIRIT_HAS_SEMANTIC_ACTION_SEP_20_2009_0626PM
#if defined(_MSC_VER)
#pragma once
#endif
#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
{
// finding out, whether a component contains a semantic action
template <typename T, typename Enable = void>
struct has_semantic_action
: mpl::false_ {};
template <typename Subject>
struct unary_has_semantic_action
: has_semantic_action<Subject> {};
template <typename Left, typename Right>
struct binary_has_semantic_action
: mpl::or_<has_semantic_action<Left>, has_semantic_action<Right> > {};
template <typename Elements>
struct nary_has_semantic_action
: mpl::not_<
is_same<
typename mpl::find_if<
Elements, has_semantic_action<mpl::_>
>::type
, typename mpl::end<Elements>::type
>
> {};
}}}
#endif
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