DynFeature.h

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/*
 *      $Id$
 *      DynFeature class interface
 *
 *      This file is part of OTAWA
 *      Copyright (c) 2009, IRIT UPS.
 *
 *      OTAWA 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 2 of the License, or
 *      (at your option) any later version.
 *
 *      OTAWA 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 OTAWA; if not, write to the Free Software
 *      Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef OTAW_PROC_DYNFEATURE_H_
#define OTAW_PROC_DYNFEATURE_H_

#include <otawa/proc/Feature.h>

namespace otawa {

// FeatureNotFound exception
class FeatureNotFound: public otawa::Exception {
public:
        FeatureNotFound(string name);
        inline const string& name(void) const { return _name; }

private:
        string _name;
};

// DynFeature class
class DynFeature {
public:
        DynFeature(string name);
        inline operator AbstractFeature *(void) const throw(FeatureNotFound)
                { if(!feature) init(); return feature; }
        inline AbstractFeature *operator*(void) const throw(FeatureNotFound)
                { if(!feature) init(); return feature; }
        inline operator AbstractFeature&(void) const throw(FeatureNotFound)
                { if(!feature) init(); return *feature; }

private:
        mutable AbstractFeature *feature;
        string _name;
        void init(void) const throw(FeatureNotFound);
};

} // otawa

#endif /* OTAW_PROC_ DYNFEATURE_H_ */