/*============================================================================= | |
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) | |