UnifyPMCB.h

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/*
 * UnifyPMCB.h
 *
 * Copyright (C) 2015 OpenCog Foundation
 *
 * Author: William Ma <https://github.com/williampma>
 *
 * 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_UNIFYPMCB_H
#define _OPENCOG_UNIFYPMCB_H

#include "BackwardChainerPMCB.h"

namespace opencog
{

class UnifyPMCB : public BackwardChainerPMCB
{
public:
    UnifyPMCB(AtomSpace*, VariableListPtr, VariableListPtr);
    virtual ~UnifyPMCB();

    virtual bool variable_match(const Handle&, const Handle&);
    virtual bool grounding(const std::map<Handle, Handle> &var_soln,
            const std::map<Handle, Handle> &pred_soln);

private:
    VariableListPtr _ext_vars;
};

}

#endif // _OPENCOG_UNIFYPMCB_H