printable.hh

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// {{{ GPL License 

// This file is part of gringo - a grounder for logic programs.
// Copyright (C) 2013  Roland Kaminski

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program 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 General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

// }}}

#ifndef _GRINGO_PRINTABLE_HH
#define _GRINGO_PRINTABLE_HH

#include <ostream>

namespace Gringo {

// {{{ defintion of Printable

class Printable {
public:
    virtual void print(std::ostream &out) const = 0;
    virtual ~Printable() { }
};

inline std::ostream &operator<<(std::ostream &out, Printable const &x) {
    x.print(out);
    return out;
}

// }}}

} // namespace Gringo

#endif // _GRINGO_PRINTABLE_HH