101 lines
2.6 KiB
C++
101 lines
2.6 KiB
C++
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/*
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COMMAND-ARGUMENT-HOLDER.hpp - specifically typed container for storage of command arguments
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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-argument-holder.hpp
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** A simple container record holding the actual command arguments.
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** While all command objects themselves have a common type (type erasure),
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** the actual argument tuple and the state memento for undo can't. Especially,
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** the size of arguments and memento will depend on their respective types.
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** Thus, to manage somehow the storage of this data, we create a common holder,
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** to be managed by a custom allocator.
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**
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** @todo doing just plain heap allocation for now :-P
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**
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** @see Command
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** @see UndoMutation
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** @see MementoTie
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** @see command-argument-test.cpp
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**
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*/
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#ifndef CONTROL_COMMAND_ARGUMENT_HOLDER_H
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#define CONTROL_COMMAND_ARGUMENT_HOLDER_H
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//#include "pre.hpp"
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//#include "lib/error.hpp"
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//#include <tr1/memory>
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//#include <boost/scoped_ptr.hpp>
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//#include <tr1/functional>
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#include <iostream>
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#include <string>
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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 boost::scoped_ptr;
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// using std::tr1::function;
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using std::ostream;
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using std::string;
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/**
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* @todo Type-comment
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*/
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class CommandArgumentHolder
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{
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public:
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virtual ~CommandArgumentHolder() { };
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virtual operator string() const =0;
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};
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inline ostream& operator<< (ostream& os, CommandArgumentHolder const& arg) { return os << string(arg); }
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/** specifically typed subclass used for actual storage */
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template<typename SIG, typename MEM>
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class ArgumentHolder
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: public CommandArgumentHolder
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{
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operator string() const { return "bääääh!"; } /////////////////TODO
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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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