| /*============================================================================== |
| Copyright (c) 2005-2010 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) |
| ==============================================================================*/ |
| #ifndef BOOST_PHOENIX_CORE_IS_ACTOR_HPP |
| #define BOOST_PHOENIX_CORE_IS_ACTOR_HPP |
| |
| #include <boost/mpl/bool.hpp> |
| |
| namespace boost { namespace phoenix |
| { |
| /////////////////////////////////////////////////////////////////////////////// |
| // |
| // is_actor<T> |
| // |
| // Tests if T is an actor. Evaluates to mpl::true_ or mpl::false_ |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| template <typename Expr> |
| struct actor; |
| |
| template <typename T, typename Enable = void> |
| struct is_actor |
| : mpl::false_ |
| {}; |
| |
| template <typename T> |
| struct is_actor<T const> |
| : is_actor<T> |
| {}; |
| |
| template <typename T> |
| struct is_actor<T &> |
| : is_actor<T> |
| {}; |
| |
| template <typename Expr> |
| struct is_actor<actor<Expr> > |
| : mpl::true_ |
| {}; |
| }} |
| |
| #endif |