/*=============================================================================
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Phoenix v1.2
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Copyright (c) 2001-2002 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef BOOST_SPIRIT_CLASSIC_PHOENIX_ACTOR_HPP
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#define BOOST_SPIRIT_CLASSIC_PHOENIX_ACTOR_HPP
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///////////////////////////////////////////////////////////////////////////////
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#include <boost/spirit/home/classic/phoenix/tuples.hpp>
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#include <boost/type_traits/remove_reference.hpp>
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///////////////////////////////////////////////////////////////////////////////
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namespace phoenix {
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// These are forward declared here because we cannot include impl.hpp
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// or operators.hpp yet but the actor's assignment operator and index
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// operator are required to be members.
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//////////////////////////////////
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struct assign_op;
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struct index_op;
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//////////////////////////////////
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namespace impl {
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template <typename OperationT, typename BaseT, typename B>
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struct make_binary1;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// unpack_tuple class
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//
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// This class is used to unpack a supplied tuple such, that the members of
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// this tuple will be handled as if they would be supplied separately.
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//
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///////////////////////////////////////////////////////////////////////////////
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template <typename TupleT>
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struct unpack_tuple : public TupleT {
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typedef TupleT tuple_t;
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unpack_tuple() {}
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unpack_tuple(tuple_t const &tuple_) : TupleT(tuple_) {}
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};
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///////////////////////////////////////////////////////////////////////////////
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//
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// actor class
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//
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// This class is a protocol class for all actors. This class is
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// essentially an interface contract. The actor class does not
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// really know how how to act on anything but instead relies on the
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// template parameter BaseT (from which the actor will derive from)
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// to do the actual action.
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//
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// An actor is a functor that is capable of accepting arguments up
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// to a predefined maximum. It is up to the base class to do the
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// actual processing or possibly to limit the arity (no. of
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// arguments) passed in. Upon invocation of the functor through a
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// supplied operator(), the actor funnels the arguments passed in
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// by the client into a tuple and calls the base eval member
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// function.
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//
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// Schematically:
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//
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// arg0 ---------|
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// arg1 ---------|
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// arg2 ---------|---> tupled_args ---> base.eval
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// ... |
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// argN ---------|
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//
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// actor::operator()(arg0, arg1... argN)
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// ---> BaseT::eval(tupled_args);
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//
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// Actor base classes from which this class inherits from are
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// expected to have a corresponding member function eval compatible
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// with the conceptual Interface:
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//
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// template <typename TupleT>
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// actor_return_type
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// eval(TupleT const& args) const;
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//
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// where args are the actual arguments passed in by the client
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// funneled into a tuple (see tuple.hpp for details).
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//
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// The actor_return_type can be anything. Base classes are free to
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// return any type, even argument dependent types (types that are
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// deduced from the types of the arguments). After evaluating the
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// parameters and doing some computations or actions, the eval
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// member function concludes by returning something back to the
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// client. To do this, the forwarding function (the actor's
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// operator()) needs to know the return type of the eval member
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// function that it is calling. For this purpose, actor base
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// classes are required to provide a nested template class:
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//
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// template <typename TupleT>
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// struct result;
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//
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// This auxiliary class provides the result type information
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// returned by the eval member function of a base actor class. The
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// nested template class result should have a typedef 'type' that
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// reflects the return type of its member function eval. It is
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// basically a type computer that answers the question "given
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// arguments packed into a TupleT type, what will be the result
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// type of the eval member function of ActorT?". The template class
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// actor_result queries this to extract the return type of an
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// actor. Example:
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//
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// typedef typename actor_result<ActorT, TupleT>::type
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// actor_return_type;
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//
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// where actor_return_type is the actual type returned by ActorT's
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// eval member function given some arguments in a TupleT.
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//
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///////////////////////////////////////////////////////////////////////////////
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template <typename ActorT, typename TupleT>
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struct actor_result {
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typedef typename ActorT::template result<TupleT>::type type;
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typedef typename boost::remove_reference<type>::type plain_type;
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};
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//////////////////////////////////
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#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
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#pragma warning(push)
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#pragma warning(disable:4512) //assignment operator could not be generated
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#endif
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template <typename BaseT>
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struct actor : public BaseT {
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actor();
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actor(BaseT const& base);
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typename actor_result<BaseT, tuple<> >::type
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operator()() const;
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template <typename A>
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typename actor_result<BaseT, tuple<A&> >::type
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operator()(A& a) const;
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template <typename A, typename B>
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typename actor_result<BaseT, tuple<A&, B&> >::type
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operator()(A& a, B& b) const;
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template <typename A, typename B, typename C>
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typename actor_result<BaseT, tuple<A&, B&, C&> >::type
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operator()(A& a, B& b, C& c) const;
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#if PHOENIX_LIMIT > 3
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template <typename A, typename B, typename C, typename D>
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typename actor_result<BaseT, tuple<A&, B&, C&, D&> >::type
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operator()(A& a, B& b, C& c, D& d) const;
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template <typename A, typename B, typename C, typename D, typename E>
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typename actor_result<BaseT, tuple<A&, B&, C&, D&, E&> >::type
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operator()(A& a, B& b, C& c, D& d, E& e) const;
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template <
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typename A, typename B, typename C, typename D, typename E,
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typename F>
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typename actor_result<BaseT, tuple<A&, B&, C&, D&, E&, F&> >::type
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operator()(A& a, B& b, C& c, D& d, E& e, F& f) const;
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#if PHOENIX_LIMIT > 6
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template <
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typename A, typename B, typename C, typename D, typename E,
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typename F, typename G>
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typename actor_result<BaseT, tuple<A&, B&, C&, D&, E&, F&, G&> >::type
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operator()(A& a, B& b, C& c, D& d, E& e, F& f, G& g) const;
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template <
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typename A, typename B, typename C, typename D, typename E,
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typename F, typename G, typename H>
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typename actor_result<BaseT,
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tuple<A&, B&, C&, D&, E&, F&, G&, H&>
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>::type
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operator()(A& a, B& b, C& c, D& d, E& e, F& f, G& g, H& h) const;
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template <
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typename A, typename B, typename C, typename D, typename E,
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typename F, typename G, typename H, typename I>
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typename actor_result<BaseT,
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&>
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>::type
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operator()(A& a, B& b, C& c, D& d, E& e, F& f, G& g, H& h, I& i) const;
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#if PHOENIX_LIMIT > 9
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template <
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typename A, typename B, typename C, typename D, typename E,
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typename F, typename G, typename H, typename I, typename J>
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typename actor_result<BaseT,
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&>
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>::type
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operator()(
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A& a, B& b, C& c, D& d, E& e, F& f, G& g, H& h, I& i, J& j) const;
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template <
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typename A, typename B, typename C, typename D, typename E,
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typename F, typename G, typename H, typename I, typename J,
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typename K>
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typename actor_result<BaseT,
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&>
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>::type
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operator()(
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A& a, B& b, C& c, D& d, E& e, F& f, G& g, H& h, I& i, J& j,
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K& k) const;
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template <
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typename A, typename B, typename C, typename D, typename E,
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typename F, typename G, typename H, typename I, typename J,
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typename K, typename L>
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typename actor_result<BaseT,
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&>
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>::type
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operator()(
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A& a, B& b, C& c, D& d, E& e, F& f, G& g, H& h, I& i, J& j,
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K& k, L& l) const;
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#if PHOENIX_LIMIT > 12
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|
template <
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typename A, typename B, typename C, typename D, typename E,
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typename F, typename G, typename H, typename I, typename J,
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typename K, typename L, typename M>
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typename actor_result<BaseT,
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&, M&>
|
>::type
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operator()(
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A& a, B& b, C& c, D& d, E& e, F& f, G& g, H& h, I& i, J& j,
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K& k, L& l, M& m) const;
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|
template <
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typename A, typename B, typename C, typename D, typename E,
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typename F, typename G, typename H, typename I, typename J,
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typename K, typename L, typename M, typename N>
|
typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&, M&, N&>
|
>::type
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operator()(
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A& a, B& b, C& c, D& d, E& e, F& f, G& g, H& h, I& i, J& j,
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K& k, L& l, M& m, N& n) const;
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|
template <
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typename A, typename B, typename C, typename D, typename E,
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typename F, typename G, typename H, typename I, typename J,
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typename K, typename L, typename M, typename N, typename O>
|
typename actor_result<BaseT,
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&, M&, N&, O&>
|
>::type
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operator()(
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A& a, B& b, C& c, D& d, E& e, F& f, G& g, H& h, I& i, J& j,
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K& k, L& l, M& m, N& n, O& o) const;
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|
#endif
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#endif
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#endif
|
#endif
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template <typename TupleT>
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typename actor_result<BaseT, unpack_tuple<TupleT> >::type
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operator()(unpack_tuple<TupleT> const &t) const;
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template <typename B>
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typename impl::make_binary1<assign_op, BaseT, B>::type
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operator=(B const& b) const;
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template <typename B>
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typename impl::make_binary1<index_op, BaseT, B>::type
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operator[](B const& b) const;
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};
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#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
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#pragma warning(pop)
|
#endif
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|
///////////////////////////////////////////////////////////////////////////
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//
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// as_actor
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//
|
// as_actor is a meta-program that converts an arbitrary type into
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// an actor. All participants in the framework must be first-class
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// actors. This meta-program is used all throughout the framework
|
// whenever an unknown type needs to be converted to an actor.
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// as_actor specializations are expected to have a typedef 'type'.
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// This is the destination actor type. A static member function
|
// 'convert' converts an object to this target type.
|
//
|
// The meta-program does no conversion if the object to be
|
// converted is already an actor.
|
//
|
///////////////////////////////////////////////////////////////////////////
|
template <typename T>
|
struct as_actor;
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|
//////////////////////////////////
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template <typename BaseT>
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struct as_actor<actor<BaseT> > {
|
|
typedef actor<BaseT> type;
|
static type convert(actor<BaseT> const& x) { return x; }
|
};
|
|
//////////////////////////////////
|
template <>
|
struct as_actor<nil_t> {
|
|
typedef nil_t type;
|
static nil_t convert(nil_t /*x*/)
|
{ return nil_t(); }
|
};
|
|
//////////////////////////////////
|
template <>
|
struct as_actor<void> {
|
|
typedef void type;
|
// ERROR!!!
|
};
|
|
///////////////////////////////////////////////////////////////////////////////
|
//
|
// actor class implementation
|
//
|
///////////////////////////////////////////////////////////////////////////////
|
template <typename BaseT>
|
actor<BaseT>::actor()
|
: BaseT() {}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
actor<BaseT>::actor(BaseT const& base)
|
: BaseT(base) {}
|
|
//////////////////////////////////
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template <typename BaseT>
|
inline typename actor_result<BaseT, tuple<> >::type
|
actor<BaseT>::operator()() const
|
{
|
return BaseT::eval(tuple<>());
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <typename A>
|
inline typename actor_result<BaseT, tuple<A&> >::type
|
actor<BaseT>::operator()(A& a_) const
|
{
|
return BaseT::eval(tuple<A&>(a_));
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <typename A, typename B>
|
inline typename actor_result<BaseT, tuple<A&, B&> >::type
|
actor<BaseT>::operator()(A& a_, B& b_) const
|
{
|
return BaseT::eval(tuple<A&, B&>(a_, b_));
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <typename A, typename B, typename C>
|
inline typename actor_result<BaseT, tuple<A&, B&, C&> >::type
|
actor<BaseT>::operator()(A& a_, B& b_, C& c_) const
|
{
|
return BaseT::eval(tuple<A&, B&, C&>(a_, b_, c_));
|
}
|
|
#if PHOENIX_LIMIT > 3
|
//////////////////////////////////
|
template <typename BaseT>
|
template <typename A, typename B, typename C, typename D>
|
inline typename actor_result<BaseT, tuple<A&, B&, C&, D&> >::type
|
actor<BaseT>::operator()(A& a_, B& b_, C& c_, D& d_) const
|
{
|
return BaseT::eval(tuple<A&, B&, C&, D&>(a_, b_, c_, d_));
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <typename A, typename B, typename C, typename D, typename E>
|
inline typename actor_result<BaseT, tuple<A&, B&, C&, D&, E&> >::type
|
actor<BaseT>::operator()(A& a_, B& b_, C& c_, D& d_, E& e_) const
|
{
|
return BaseT::eval(tuple<A&, B&, C&, D&, E&>(a_, b_, c_, d_, e_));
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <
|
typename A, typename B, typename C, typename D, typename E,
|
typename F>
|
inline typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&>
|
>::type
|
actor<BaseT>::operator()(
|
A& a_, B& b_, C& c_, D& d_, E& e_, F& f_
|
) const
|
{
|
return BaseT::eval(
|
tuple<A&, B&, C&, D&, E&, F&>
|
(a_, b_, c_, d_, e_, f_)
|
);
|
}
|
|
#if PHOENIX_LIMIT > 6
|
//////////////////////////////////
|
template <typename BaseT>
|
template <
|
typename A, typename B, typename C, typename D, typename E,
|
typename F, typename G>
|
inline typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&, G&>
|
>::type
|
actor<BaseT>::operator()(
|
A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_
|
) const
|
{
|
return BaseT::eval(
|
tuple<A&, B&, C&, D&, E&, F&, G&>
|
(a_, b_, c_, d_, e_, f_, g_)
|
);
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <
|
typename A, typename B, typename C, typename D, typename E,
|
typename F, typename G, typename H>
|
inline typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&>
|
>::type
|
actor<BaseT>::operator()(
|
A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_, H& h_
|
) const
|
{
|
return BaseT::eval(
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&>
|
(a_, b_, c_, d_, e_, f_, g_, h_)
|
);
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <
|
typename A, typename B, typename C, typename D, typename E,
|
typename F, typename G, typename H, typename I>
|
inline typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&>
|
>::type
|
actor<BaseT>::operator()(
|
A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_, H& h_, I& i_
|
) const
|
{
|
return BaseT::eval(
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&>
|
(a_, b_, c_, d_, e_, f_, g_, h_, i_)
|
);
|
}
|
|
#if PHOENIX_LIMIT > 9
|
//////////////////////////////////
|
template <typename BaseT>
|
template <
|
typename A, typename B, typename C, typename D, typename E,
|
typename F, typename G, typename H, typename I, typename J>
|
inline typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&>
|
>::type
|
actor<BaseT>::operator()(
|
A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_, H& h_, I& i_, J& j_
|
) const
|
{
|
return BaseT::eval(
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&>
|
(a_, b_, c_, d_, e_, f_, g_, h_, i_, j_)
|
);
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <
|
typename A, typename B, typename C, typename D, typename E,
|
typename F, typename G, typename H, typename I, typename J,
|
typename K>
|
inline typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&>
|
>::type
|
actor<BaseT>::operator()(
|
A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_, H& h_, I& i_, J& j_,
|
K& k_
|
) const
|
{
|
return BaseT::eval(
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&>
|
(a_, b_, c_, d_, e_, f_, g_, h_, i_, j_, k_)
|
);
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <
|
typename A, typename B, typename C, typename D, typename E,
|
typename F, typename G, typename H, typename I, typename J,
|
typename K, typename L>
|
inline typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&>
|
>::type
|
actor<BaseT>::operator()(
|
A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_, H& h_, I& i_, J& j_,
|
K& k_, L& l_
|
) const
|
{
|
return BaseT::eval(
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&>
|
(a_, b_, c_, d_, e_, f_, g_, h_, i_, j_, k_, l_)
|
);
|
}
|
|
#if PHOENIX_LIMIT > 12
|
//////////////////////////////////
|
template <typename BaseT>
|
template <
|
typename A, typename B, typename C, typename D, typename E,
|
typename F, typename G, typename H, typename I, typename J,
|
typename K, typename L, typename M>
|
inline typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&, M&>
|
>::type
|
actor<BaseT>::operator()(
|
A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_, H& h_, I& i_, J& j_,
|
K& k_, L& l_, M& m_
|
) const
|
{
|
return BaseT::eval(
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&, M&>
|
(a_, b_, c_, d_, e_, f_, g_, h_, i_, j_, k_, l_, m_)
|
);
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <
|
typename A, typename B, typename C, typename D, typename E,
|
typename F, typename G, typename H, typename I, typename J,
|
typename K, typename L, typename M, typename N>
|
inline typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&, M&, N&>
|
>::type
|
actor<BaseT>::operator()(
|
A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_, H& h_, I& i_, J& j_,
|
K& k_, L& l_, M& m_, N& n_
|
) const
|
{
|
return BaseT::eval(
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&, M&, N&>
|
(a_, b_, c_, d_, e_, f_, g_, h_, i_, j_, k_, l_, m_, n_)
|
);
|
}
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <
|
typename A, typename B, typename C, typename D, typename E,
|
typename F, typename G, typename H, typename I, typename J,
|
typename K, typename L, typename M, typename N, typename O>
|
inline typename actor_result<BaseT,
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&, M&, N&, O&>
|
>::type
|
actor<BaseT>::operator()(
|
A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_, H& h_, I& i_, J& j_,
|
K& k_, L& l_, M& m_, N& n_, O& o_
|
) const
|
{
|
return BaseT::eval(
|
tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&, M&, N&, O&>
|
(a_, b_, c_, d_, e_, f_, g_, h_, i_, j_, k_, l_, m_, n_, o_)
|
);
|
}
|
|
#endif
|
#endif
|
#endif
|
#endif
|
|
//////////////////////////////////
|
template <typename BaseT>
|
template <typename TupleT>
|
typename actor_result<BaseT, unpack_tuple<TupleT> >::type
|
actor<BaseT>::operator()(unpack_tuple<TupleT> const &t) const
|
{
|
return BaseT::eval(t);
|
}
|
|
///////////////////////////////////////////////////////////////////////////////
|
} // namespace phoenix
|
|
#endif
|
