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//
//      aegis - project change supervisor
//      Copyright (C) 2007, 2008, 2012 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 LIBAEGIS_SUB_FUNCTOR_VARIABLE_H
#define LIBAEGIS_SUB_FUNCTOR_VARIABLE_H

#include <libaegis/sub/functor.h>

class sub_functor_variable:
    public sub_functor
{
public:
    virtual ~sub_functor_variable();

private:
    sub_functor_variable(const nstring &name, const nstring &value);

public:
    static pointer create(const nstring &name, const nstring &value);

protected:
    // See base class for documentation
    wstring evaluate(sub_context_ty *cp, const wstring_list &arg);

    // See base class for documentation
    bool append_if_unused() const;

    // See base class for documentation
    bool override() const;

    // See base class for documentation
    bool resubstitute() const;

    // See base class for documentation
    bool must_be_used() const;

    // See base class for documentation
    void resubstitute_set();

    // See base class for documentation
    void override_set();

    // See base class for documentation
    void optional_set();

    // See base class for documentation
    void append_if_unused_set();

private:
    wstring value;

    bool used;

    bool append_if_unused_flag;

    bool override_flag;

    bool resubstitute_flag;

    sub_functor_variable();

    sub_functor_variable(const sub_functor_variable &);

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

#endif // LIBAEGIS_SUB_FUNCTOR_VARIABLE_H
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