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