| /*============================================================================= |
| Copyright (c) 2005-2007 Dan Marsden |
| Copyright (c) 2005-2007 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 PHOENIX_STATEMENT_THROW_HPP |
| #define PHOENIX_STATEMENT_THROW_HPP |
| |
| #include <boost/spirit/home/phoenix/core/actor.hpp> |
| #include <boost/spirit/home/phoenix/core/composite.hpp> |
| #include <boost/spirit/home/phoenix/core/compose.hpp> |
| |
| #include <boost/mpl/bool.hpp> |
| |
| namespace boost { namespace phoenix { |
| |
| struct throw_new_eval |
| { |
| template<typename Env, typename ThrowExpr> |
| struct result |
| { |
| typedef void type; |
| }; |
| |
| template<typename Rt, typename Env, typename ThrowExpr> |
| static void |
| eval(const Env& env, ThrowExpr& throwExpr) |
| { |
| throw throwExpr.eval(env); |
| } |
| }; |
| |
| struct throw_again_eval |
| { |
| typedef mpl::false_ no_nullary; |
| |
| template<typename Env> |
| struct result |
| { |
| typedef void type; |
| }; |
| |
| template<typename Env> |
| void eval(const Env&) const |
| { |
| throw; |
| } |
| }; |
| |
| inline actor<throw_again_eval> throw_() |
| { |
| return throw_again_eval(); |
| } |
| |
| template<typename Actor> |
| actor<typename as_composite<throw_new_eval, Actor>::type> |
| throw_(const Actor& a) |
| { |
| return compose<throw_new_eval>(a); |
| } |
| }} |
| |
| #endif |