strong_type.h

/*
 *  StrongType class
 *
 *  This file is part of OTAWA
 *  Copyright (c) 2006-19, 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_UTIL_STRONG_TYPE_H
#define ELM_UTIL_STRONG_TYPE_H
 
// SolidType class
template <class T>
class SolidType {
public:
    inline explicit SolidType(T v = 0): _v(v) { }
    inline T operator*(void) const { return _v; }
    inline T& operator*(void) { return _v; }
private:
    T _v;
};
 
 
// OTAWA_STRONG_TYPE macro
#define OTAWA_STRONG_TYPE(N, T) \
    typedef struct N { \
        typedef T _t; \
        _t v; \
        inline N(_t _v = 0): v(_v) { }; \
        inline operator const _t&(void) const { return v; } \
        inline operator _t&(void) { return v; } \
        inline struct N& operator=(const _t& _v) { v = _v; return *this; } \
        inline const _t& operator*(void) const { return v; } \
        inline _t& operator*(void) { return v; } \
    } N
 
// Shortcut
#ifndef OTAWA_NO_SHORTCUT
#   define STRONG_TYPE(N, T) OTAWA_STRONG_TYPE(N, T)
#endif
 
#endif // ELM_UTIL_STRONG_TYPE_H