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604 lines
19 KiB
604 lines
19 KiB
/*============================================================================= |
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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 PHOENIX_ACTOR_HPP |
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#define PHOENIX_ACTOR_HPP |
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/////////////////////////////////////////////////////////////////////////////// |
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#include <boost/spirit/home/classic/phoenix/tuples.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 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&> |
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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, 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> |
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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&, N&> |
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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, 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> |
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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&, N&, O&> |
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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, M& m, N& n, O& o) const; |
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#endif |
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#endif |
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#endif |
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#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) |
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#endif |
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/////////////////////////////////////////////////////////////////////////// |
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// |
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// as_actor |
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// |
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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 |
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// 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 |
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// 'convert' converts an object to this target type. |
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// |
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// The meta-program does no conversion if the object to be |
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// converted is already an actor. |
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// |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename T> |
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struct as_actor; |
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////////////////////////////////// |
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template <typename BaseT> |
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struct as_actor<actor<BaseT> > { |
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typedef actor<BaseT> type; |
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static type convert(actor<BaseT> const& x) { return x; } |
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}; |
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////////////////////////////////// |
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template <> |
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struct as_actor<nil_t> { |
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typedef nil_t type; |
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static nil_t convert(nil_t /*x*/) |
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{ return nil_t(); } |
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}; |
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////////////////////////////////// |
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template <> |
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struct as_actor<void> { |
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typedef void type; |
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// ERROR!!! |
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}; |
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/////////////////////////////////////////////////////////////////////////////// |
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// |
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// actor class implementation |
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// |
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/////////////////////////////////////////////////////////////////////////////// |
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template <typename BaseT> |
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actor<BaseT>::actor() |
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: BaseT() {} |
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////////////////////////////////// |
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template <typename BaseT> |
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actor<BaseT>::actor(BaseT const& base) |
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: BaseT(base) {} |
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////////////////////////////////// |
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template <typename BaseT> |
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inline typename actor_result<BaseT, tuple<> >::type |
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actor<BaseT>::operator()() const |
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{ |
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return BaseT::eval(tuple<>()); |
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} |
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////////////////////////////////// |
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template <typename BaseT> |
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template <typename A> |
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inline typename actor_result<BaseT, tuple<A&> >::type |
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actor<BaseT>::operator()(A& a_) const |
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{ |
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return BaseT::eval(tuple<A&>(a_)); |
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} |
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////////////////////////////////// |
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template <typename BaseT> |
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template <typename A, typename B> |
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inline typename actor_result<BaseT, tuple<A&, B&> >::type |
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actor<BaseT>::operator()(A& a_, B& b_) const |
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{ |
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return BaseT::eval(tuple<A&, B&>(a_, b_)); |
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} |
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////////////////////////////////// |
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template <typename BaseT> |
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template <typename A, typename B, typename C> |
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inline typename actor_result<BaseT, tuple<A&, B&, C&> >::type |
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actor<BaseT>::operator()(A& a_, B& b_, C& c_) const |
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{ |
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return BaseT::eval(tuple<A&, B&, C&>(a_, b_, c_)); |
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} |
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#if PHOENIX_LIMIT > 3 |
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////////////////////////////////// |
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template <typename BaseT> |
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template <typename A, typename B, typename C, typename D> |
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inline typename actor_result<BaseT, tuple<A&, B&, C&, D&> >::type |
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actor<BaseT>::operator()(A& a_, B& b_, C& c_, D& d_) const |
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{ |
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return BaseT::eval(tuple<A&, B&, C&, D&>(a_, b_, c_, d_)); |
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} |
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////////////////////////////////// |
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template <typename BaseT> |
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template <typename A, typename B, typename C, typename D, typename E> |
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inline typename actor_result<BaseT, tuple<A&, B&, C&, D&, E&> >::type |
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actor<BaseT>::operator()(A& a_, B& b_, C& c_, D& d_, E& e_) const |
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{ |
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return BaseT::eval(tuple<A&, B&, C&, D&, E&>(a_, b_, c_, d_, e_)); |
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} |
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////////////////////////////////// |
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template <typename BaseT> |
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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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inline typename actor_result<BaseT, |
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tuple<A&, B&, C&, D&, E&, F&> |
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>::type |
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actor<BaseT>::operator()( |
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A& a_, B& b_, C& c_, D& d_, E& e_, F& f_ |
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) const |
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{ |
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return BaseT::eval( |
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tuple<A&, B&, C&, D&, E&, F&> |
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(a_, b_, c_, d_, e_, f_) |
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); |
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} |
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#if PHOENIX_LIMIT > 6 |
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////////////////////////////////// |
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template <typename BaseT> |
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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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inline typename actor_result<BaseT, |
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tuple<A&, B&, C&, D&, E&, F&, G&> |
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>::type |
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actor<BaseT>::operator()( |
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A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_ |
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) const |
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{ |
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return BaseT::eval( |
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tuple<A&, B&, C&, D&, E&, F&, G&> |
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(a_, b_, c_, d_, e_, f_, g_) |
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); |
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} |
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////////////////////////////////// |
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template <typename BaseT> |
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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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inline 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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actor<BaseT>::operator()( |
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A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_, H& h_ |
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) const |
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{ |
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return BaseT::eval( |
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tuple<A&, B&, C&, D&, E&, F&, G&, H&> |
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(a_, b_, c_, d_, e_, f_, g_, h_) |
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); |
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} |
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////////////////////////////////// |
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template <typename BaseT> |
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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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inline 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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actor<BaseT>::operator()( |
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A& a_, B& b_, C& c_, D& d_, E& e_, F& f_, G& g_, H& h_, I& i_ |
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) const |
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{ |
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return BaseT::eval( |
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&> |
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(a_, b_, c_, d_, e_, f_, g_, h_, i_) |
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); |
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} |
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#if PHOENIX_LIMIT > 9 |
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////////////////////////////////// |
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template <typename BaseT> |
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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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inline 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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actor<BaseT>::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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) const |
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{ |
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return BaseT::eval( |
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&> |
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(a_, b_, c_, d_, e_, f_, g_, h_, i_, j_) |
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); |
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} |
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////////////////////////////////// |
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template <typename BaseT> |
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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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inline 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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actor<BaseT>::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_ |
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) const |
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{ |
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return BaseT::eval( |
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&> |
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(a_, b_, c_, d_, e_, f_, g_, h_, i_, j_, k_) |
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); |
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} |
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////////////////////////////////// |
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template <typename BaseT> |
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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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inline 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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actor<BaseT>::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_ |
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) const |
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{ |
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return BaseT::eval( |
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&> |
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(a_, b_, c_, d_, e_, f_, g_, h_, i_, j_, k_, l_) |
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); |
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} |
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#if PHOENIX_LIMIT > 12 |
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////////////////////////////////// |
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template <typename BaseT> |
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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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inline typename actor_result<BaseT, |
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tuple<A&, B&, C&, D&, E&, F&, G&, H&, I&, J&, K&, L&, M&> |
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>::type |
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actor<BaseT>::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_, |
|
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_) |
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); |
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} |
|
|
|
////////////////////////////////// |
|
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
|
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|