ext-boost/boost/strong_typedef.hpp
2014-12-07 23:50:51 +01:00

67 lines
3.3 KiB
C++

#ifndef BOOST_STRONG_TYPEDEF_HPP
#define BOOST_STRONG_TYPEDEF_HPP
// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# pragma once
#endif
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// strong_typedef.hpp:
// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org/libs/serialization for updates, documentation, and revision history.
// macro used to implement a strong typedef. strong typedef
// guarentees that two types are distinguised even though the
// share the same underlying implementation. typedef does not create
// a new type. BOOST_STRONG_TYPEDEF(T, D) creates a new type named D
// that operates as a type T.
#include <boost/config.hpp>
#include <boost/operators.hpp>
#if !defined(__BORLANDC__) || __BORLANDC__ >= 0x590
#define BOOST_STRONG_TYPEDEF(T, D) \
struct D \
: boost::totally_ordered1< D \
, boost::totally_ordered2< D, T \
> > \
{ \
T t; \
explicit D(const T t_) : t(t_) {}; \
D(){}; \
D(const D & t_) : t(t_.t){} \
D & operator=(const D & rhs) { t = rhs.t; return *this;} \
D & operator=(const T & rhs) { t = rhs; return *this;} \
operator const T & () const {return t; } \
operator T & () { return t; } \
bool operator==(const D & rhs) const { return t == rhs.t; } \
bool operator<(const D & rhs) const { return t < rhs.t; } \
};
#else
#define BOOST_STRONG_TYPEDEF(T, D) \
struct D \
: boost::totally_ordered1< D \
, boost::totally_ordered2< D, T \
> > \
{ \
T t; \
explicit D(const T t_) : t(t_) {}; \
D(){}; \
D(const D & t_) : t(t_.t){} \
D & operator=(const D & rhs) { t = rhs.t; return *this;} \
D & operator=(const T & rhs) { t = rhs; return *this;} \
/*operator const T & () const {return t; }*/ \
operator T & () { return t; } \
bool operator==(const D & rhs) const { return t == rhs.t; } \
bool operator<(const D & rhs) const { return t < rhs.t; } \
};
#endif // !defined(__BORLANDC) || __BORLANDC__ >= 0x590
#endif // BOOST_STRONG_TYPEDEF_HPP