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