Printable.h

/*
 Printable.h - Interface class that allows printing of complex types
 Copyright (c) 2011 Adrian McEwen.  All right reserved.

 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef Printable_h
#define Printable_h

#include <stdlib.h>

class Print;

/** The Printable class provides a way for new classes to allow themselves to be printed.
 By deriving from Printable and implementing the printTo method, it will then be possible
 for users to print out instances of this class by passing them into the usual
 Print::print and Print::println methods.
 */

class Printable
{
public:
    virtual ~Printable() {}
    virtual size_t printTo(Print& p) const = 0;
};

#endif