aefind/tree/constant.h

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//
//      aegis - project change supervisor
//      Copyright (C) 1997, 2002, 2005-2008 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 AEFIND_TREE_CONSTANT_H
#define AEFIND_TREE_CONSTANT_H

#include <aefind/tree.h>

struct rpt_value_ty; // existence

class tree_constant:
    public tree
{
public:
    virtual ~tree_constant();

private:
    tree_constant(rpt_value::pointer value);

public:
    static tree::pointer create(rpt_value::pointer value);

protected:
    // See base class for documentation.
    const char *name() const;

    // See base class for documentation.
    void print() const;

    // See base class for documentation.
    rpt_value::pointer evaluate(string_ty *, string_ty *, string_ty *,
        struct stat *) const;

    // See base class for documentation.
    bool useful() const;

    // See base class for documentation.
    bool constant() const;

    // See base class for documentation.
    tree::pointer optimize() const;

private:
    rpt_value::pointer value;

    tree_constant();

    tree_constant(const tree_constant &);

    tree_constant &operator=(const tree_constant &);
};

#endif // AEFIND_TREE_CONSTANT_H