| /*============================================================================= |
| Copyright (c) 2001-2007 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 BOOST_PP_IS_ITERATING |
| #ifndef PHOENIX_CORE_DETAIL_COMPOSITE_EVAL_HPP |
| #define PHOENIX_CORE_DETAIL_COMPOSITE_EVAL_HPP |
| |
| #include <boost/preprocessor/iterate.hpp> |
| #include <boost/preprocessor/repetition/enum.hpp> |
| #include <boost/preprocessor/repetition/enum_params.hpp> |
| |
| namespace detail |
| { |
| template <int N> |
| struct composite_eval; |
| |
| template <> |
| struct composite_eval<0> |
| { |
| template <typename Composite, typename Env> |
| struct result |
| { |
| typedef typename Composite::eval_policy_type:: |
| template result<Env>::type |
| type; |
| }; |
| |
| template <typename RT, typename Composite, typename Env> |
| static RT |
| call(Composite const& /*composite*/, Env const& env) |
| { |
| typedef typename Composite::eval_policy_type eval_policy_type; |
| return eval_policy_type::template eval<RT>(env); |
| } |
| }; |
| |
| template <typename Actor, typename Env> |
| struct eval_is_actor |
| : is_actor<typename Actor::template result<Env>::type> {}; |
| |
| template <typename Actor, typename Env> |
| struct eval_is_void |
| : is_same<typename Actor::template result<Env>::type, fusion::void_> {}; |
| } |
| |
| #define PHOENIX_GET_ACTOR_TYPE(z, n, data) \ |
| typedef \ |
| typename fusion::result_of::value_at_c<Composite, n>::type \ |
| BOOST_PP_CAT(actor, n); |
| |
| #define PHOENIX_GET_ACTOR(z, n, data) \ |
| fusion::at_c<n>(composite) |
| |
| #define BOOST_PP_ITERATION_PARAMS_1 \ |
| (3, (1, PHOENIX_COMPOSITE_LIMIT, \ |
| "boost/spirit/home/phoenix/core/detail/composite_eval.hpp")) |
| #include BOOST_PP_ITERATE() |
| |
| #undef PHOENIX_GET_ACTOR |
| #undef PHOENIX_GET_ACTOR_TYPE |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // |
| // Preprocessor vertical repetition code |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| #else // defined(BOOST_PP_IS_ITERATING) |
| |
| #define N BOOST_PP_ITERATION() |
| |
| namespace detail |
| { |
| template <> |
| struct composite_eval<N> |
| { |
| template <typename Composite, typename Env> |
| struct result |
| { |
| BOOST_PP_REPEAT(N, PHOENIX_GET_ACTOR_TYPE, _) |
| |
| typedef typename |
| Composite::eval_policy_type::template result< |
| Env, BOOST_PP_ENUM_PARAMS(N, actor) |
| >::type |
| type; |
| }; |
| |
| template <typename RT, typename Composite, typename Env> |
| static RT |
| call(Composite const& composite, Env const& env) |
| { |
| typedef typename Composite::eval_policy_type eval_policy_type; |
| return eval_policy_type::template eval<RT>( |
| env, BOOST_PP_ENUM(N, PHOENIX_GET_ACTOR, _)); |
| } |
| }; |
| } |
| |
| #undef N |
| #endif // defined(BOOST_PP_IS_ITERATING) |
| |
| |