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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 PHOENIX_CORE_COMPOSITE_HPP
#define PHOENIX_CORE_COMPOSITE_HPP
#include <boost/spirit/home/phoenix/core/actor.hpp>
#include <boost/spirit/home/phoenix/core/is_actor.hpp>
#include <boost/fusion/include/vector.hpp>
#include <boost/fusion/include/at.hpp>
#include <boost/fusion/include/size.hpp>
#include <boost/fusion/include/mpl.hpp>
#include <boost/mpl/fold.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/or.hpp>
namespace boost { namespace phoenix
{
namespace detail
{
template <int N>
struct composite_eval;
struct compute_no_nullary
{
template <typename State, typename T>
struct apply
{
typedef typename
mpl::or_<typename T::no_nullary, State>::type
type;
};
};
}
template <typename EvalPolicy, typename EvalTuple>
struct composite : EvalTuple
{
typedef EvalTuple base_type;
typedef composite<EvalPolicy, EvalTuple> self_type;
typedef EvalPolicy eval_policy_type;
typedef typename
mpl::fold<
EvalTuple
, mpl::false_
, detail::compute_no_nullary
>::type
no_nullary;
template <typename Env>
struct result
{
typedef
typename detail::composite_eval<
fusion::result_of::size<base_type>::value>::
template result<self_type, Env>::type
type;
};
composite()
: base_type() {}
composite(base_type const& base)
: base_type(base) {}
template <typename U0>
composite(U0& _0)
: base_type(_0) {}
template <typename U0, typename U1>
composite(U0& _0, U1& _1)
: base_type(_0, _1) {}
template <typename Env>
typename result<Env>::type
eval(Env const& env) const
{
typedef typename result<Env>::type return_type;
return detail::
composite_eval<fusion::result_of::size<base_type>::value>::template
call<return_type>(*this, env);
}
// Bring in the rest of the constructors
#include <boost/spirit/home/phoenix/core/detail/composite.hpp>
};
// Bring in the detail::composite_eval<0..N> definitions
#include <boost/spirit/home/phoenix/core/detail/composite_eval.hpp>
}}
#endif
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Swift