Instantiator.h

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/*
 * Instantiator.h
 *
 * Copyright (C) 2009, 2014 Linas Vepstas
 *
 * Author: Linas Vepstas <linasvepstas@gmail.com>  January 2009
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License v3 as
 * published by the Free Software Foundation and including the exceptions
 * at http://opencog.org/wiki/Licenses
 *
 * 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 Affero General Public License
 * along with this program; if not, write to:
 * Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef _OPENCOG_INSTANTIATOR_H
#define _OPENCOG_INSTANTIATOR_H

#include <opencog/atomspace/AtomSpace.h>

namespace opencog {

class Instantiator
{
private:
        AtomSpace *_as;
        const std::map<Handle, Handle> *_vmap;
        bool _halt = false;

        Handle walk_tree(const Handle& tree);

    public:
        Instantiator(AtomSpace* as) : _as(as) {}

        Handle instantiate(const Handle& expr, const std::map<Handle, Handle> &vars);
        Handle execute(const Handle& expr)
        {
            return instantiate(expr, std::map<Handle, Handle>());
        }
};

} // namespace opencog

#endif // _OPENCOG_INSTANTIATOR_H