libaegis/aer/func.h

Go to the documentation of this file.

//
//      aegis - project change supervisor
//      Copyright (C) 1994, 2002-2008 Peter Miller.
//
//      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 AEGIS_AER_FUNC_H
#define AEGIS_AER_FUNC_H

#include <common/ac/shared_ptr.h>
#include <common/ac/stddef.h>

#include <common/symtab/template.h>
#include <libaegis/aer/expr.h>
#include <libaegis/aer/value.h>


class rpt_func
{
public:
    typedef aegis_shared_ptr<rpt_func> pointer;

    virtual ~rpt_func();

protected:
    rpt_func();

public:
    virtual const char *name() const = 0;

    virtual bool optimizable() const = 0;

    virtual bool verify(const rpt_expr::pointer &ep) const = 0;

    virtual rpt_value::pointer run(const rpt_expr::pointer &ep, size_t argc,
        rpt_value::pointer *argv) const = 0;

    static void init(symtab<rpt_value::pointer> &);
};

#endif // AEGIS_AER_FUNC_H