EnumOption.h

/*
 *  $Id$
 *  EnumOption class interface
 *
 *  This file is part of OTAWA
 *  Copyright (c) 2006-07, 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 ELM_OPTION_ENUM_OPTION_H
#define ELM_OPTION_ENUM_OPTION_H

#include <elm/option/StandardOption.h>

namespace elm { namespace option {

// BoolOption class
template <class T>
class EnumOption: public StandardOption {
public:
    typedef struct value_t {
        elm::CString name;
        T value;
    } value_t;
private:
    int val;
    value_t *vals;
    String arg;
public:
    inline EnumOption(Manager& manager, char short_name, CString description,
        value_t values[]);
    inline EnumOption(Manager& manager, CString long_name, CString description,
        value_t values[]);
    inline EnumOption(Manager& manager, char short_name, CString long_name,
        CString description, value_t values[]);
    inline const T& value(void) const;
    inline void set(const T& value);

    // Option overload
    virtual usage_t usage(void);
    virtual CString argDescription(void);
    virtual void process(String arg);
    
    // Operators
    inline operator T(void) const;
    inline EnumOption& operator=(const T& value);
};


// EnumOption inlines
template <class T>
EnumOption<T>::EnumOption(Manager& manager, char short_name, CString description,
value_t values[]): StandardOption(manager, short_name, description),
val(values[0].value), vals(values) {
}

template <class T>
EnumOption<T>::EnumOption(Manager& manager, CString long_name,
CString description, value_t values[]): StandardOption(manager, long_name,
description), val(values[0].value), vals(values) {
}

template <class T>
EnumOption<T>::EnumOption(Manager& manager, char short_name, CString long_name,
CString description, value_t values[]): StandardOption(manager, short_name,
long_name, description), val(values[0].value), vals(values) {
}

template <class T>
inline const T& EnumOption<T>::value(void) const {
    return val;
}

template <class T>
inline void EnumOption<T>::set(const T& value) {
    val = value;
}

template <class T>
usage_t EnumOption<T>::usage(void) {
    return arg_required;
}

template <class T>
CString EnumOption<T>::argDescription(void) {
    return vals[0].name;
}

template <class T>
void EnumOption<T>::process(String arg) {
    for(int i = 1; vals[i].name; i++)
        if(arg == vals[i].name) {
            val = vals[i].value;
            return;
        }
    throw OptionException(_ << "bad value \"" << arg << "\"");
}
    
template <class T>
EnumOption<T>::operator T(void) const {
    return val;
}

template <class T>
EnumOption<T>& EnumOption<T>::operator=(const T& value) {
    val = value;
    return *this;
}

} } // elm::option

#endif // ELM_OPTION_ENUM_OPTION_H