boost/serialization/strong_typedef.hpp
#ifndef BOOST_SERIALIZATION_STRONG_TYPEDEF_HPP
#define BOOST_SERIALIZATION_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 .
// (C) Copyright 2016 Ashish Sadanandan
// 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
// guarantees that two types are distinguished even though they
// 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>
#include <boost/type_traits/has_nothrow_assign.hpp>
#include <boost/type_traits/has_nothrow_constructor.hpp>
#include <boost/type_traits/has_nothrow_copy.hpp>
#define BOOST_STRONG_TYPEDEF(T, D) \
struct D \
: boost::totally_ordered1< D \
, boost::totally_ordered2< D, T \
> > \
{ \
T t; \
explicit D(const T& t_) BOOST_NOEXCEPT_IF(boost::has_nothrow_copy_constructor<T>::value) : t(t_) {} \
D() BOOST_NOEXCEPT_IF(boost::has_nothrow_default_constructor<T>::value) : t() {} \
D(const D & t_) BOOST_NOEXCEPT_IF(boost::has_nothrow_copy_constructor<T>::value) : t(t_.t) {} \
D& operator=(const D& rhs) BOOST_NOEXCEPT_IF(boost::has_nothrow_assign<T>::value) {t = rhs.t; return *this;} \
D& operator=(const T& rhs) BOOST_NOEXCEPT_IF(boost::has_nothrow_assign<T>::value) {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 // BOOST_SERIALIZATION_STRONG_TYPEDEF_HPP