182 lines
4.3 KiB
C++
182 lines
4.3 KiB
C++
/*
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COMMAND-CLOSURE.hpp - defining execution targets and parameters for commands
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Copyright (C) Lumiera.org
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2009, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/** @file command-closure.hpp
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** A closure enabling self-contained execution of commands within the ProcDispatcher.
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** //TODO
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**
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** @see Command
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** @see ProcDispatcher
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**
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*/
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#ifndef CONTROL_COMMAND_CLOSURE_H
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#define CONTROL_COMMAND_CLOSURE_H
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//#include "pre.hpp"
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#include "lib/meta/typelist.hpp"
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#include "lib/meta/function.hpp"
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#include "lib/meta/function-closure.hpp"
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#include "lib/meta/tuple.hpp"
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#include <tr1/memory>
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#include <tr1/functional>
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#include <iostream>
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#include <string>
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#include "lib/test/test-helper.hpp" /////////////////TODO remove this
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using lib::test::showSizeof;
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using std::cout; //////////////////////////////////TODO remove this
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using std::endl;
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namespace control {
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// using lumiera::Symbol;
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// using std::tr1::shared_ptr;
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using std::string;
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using std::ostream;
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using std::tr1::function;
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using lumiera::typelist::FunctionSignature;
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using lumiera::typelist::Tuple;
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using lumiera::typelist::BuildTupleAccessor;
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using lumiera::typelist::NullType;
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class CmdClosure;
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typedef std::tr1::shared_ptr<CmdClosure> PClo; ///< smart-ptr type used for handling concrete closures
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/** Interface */
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class CmdClosure
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{
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public:
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virtual ~CmdClosure() {}
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virtual PClo clone() const =0;
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virtual operator string() const =0;
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};
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inline ostream& operator<< (ostream& os, const CmdClosure& clo) { return os << string(clo); }
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template
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< typename TY
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, class BASE
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, class TUP
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, uint idx
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>
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class ParamAccessor
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: public BASE
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{
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TY& element() { return BASE::template getAt<idx>(); }
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public:
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ParamAccessor(TUP const& tuple)
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: BASE(tuple)
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{
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cout << showSizeof(element()) << endl; //////////TODO remove this test code
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}
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string
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dump (string const& prefix = "(") const
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{
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return BASE::dump (prefix+element());
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}
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////////////////////TODO the real access operations (e.g. for serialising) go here
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};
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template<class TUP>
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class ParamAccessor<NullType, TUP, TUP, 0>
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: public TUP
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{
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public:
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ParamAccessor(TUP const& tuple)
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: TUP(tuple)
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{ }
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////////////////////TODO the recursion-end of the access operations goes here
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protected:
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string
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dump (string const& prefix) const
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{
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return prefix+")";
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}
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};
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template<typename SIG>
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class Closure
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: public CmdClosure
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{
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typedef typename FunctionSignature< function<SIG> >::Args Args;
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typedef Tuple<Args> ArgTuple;
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typedef BuildTupleAccessor<Args,ParamAccessor> BuildAccessor;
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typedef typename BuildAccessor::Accessor ParamStorageTuple;
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ParamStorageTuple params_;
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public:
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Closure (ArgTuple const& args)
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: params_(BuildAccessor(args))
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{ }
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/** create a clone copy of this concrete closure,
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* hidden behind the generic CmdClosure interface
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* and owned by a shared_ptr PClo.
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*/
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PClo
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clone() const
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{
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return PClo (new Closure (this->params_));
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}
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operator string() const
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{
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UNIMPLEMENTED ("how to do a string conversion on the variable argument tuple??");
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}
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};
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////////////////TODO currently just fleshing out the API....
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} // namespace control
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#endif
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