[857] | 1 | #ifndef BOOST_STRONG_TYPEDEF_HPP
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| 2 | #define BOOST_STRONG_TYPEDEF_HPP
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| 3 |
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| 4 | // MS compatible compilers support #pragma once
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| 5 | #if defined(_MSC_VER) && (_MSC_VER >= 1020)
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| 6 | # pragma once
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| 7 | #endif
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| 8 |
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| 9 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
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| 10 | // strong_typedef.hpp:
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| 11 |
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| 12 | // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
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| 13 | // Use, modification and distribution is subject to the Boost Software
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| 14 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 15 | // http://www.boost.org/LICENSE_1_0.txt)
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| 16 |
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| 17 | // See http://www.boost.org for updates, documentation, and revision history.
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| 18 |
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| 19 | // macro used to implement a strong typedef. strong typedef
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| 20 | // guarentees that two types are distinguised even though the
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| 21 | // share the same underlying implementation. typedef does not create
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| 22 | // a new type. BOOST_STRONG_TYPEDEF(T, D) creates a new type named D
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| 23 | // that operates as a type T.
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| 24 |
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| 25 | #include <boost/operators.hpp>
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| 26 |
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| 27 | #define BOOST_STRONG_TYPEDEF(T, D) \
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| 28 | struct D \
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| 29 | : boost::totally_ordered1< D \
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| 30 | , boost::totally_ordered2< D, T \
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| 31 | > > \
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| 32 | { \
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| 33 | T t; \
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| 34 | explicit D(const T t_) : t(t_) {}; \
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| 35 | D(){}; \
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| 36 | D(const D & t_) : t(t_.t){} \
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| 37 | D & operator=(const D & rhs) { t = rhs.t; return *this;} \
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| 38 | D & operator=(const T & rhs) { t = rhs; return *this;} \
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| 39 | operator const T & () const {return t; } \
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| 40 | operator T & () { return t; } \
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| 41 | bool operator==(const D & rhs) const { return t == rhs.t; } \
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| 42 | bool operator<(const D & rhs) const { return t < rhs.t; } \
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| 43 | };
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| 44 |
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| 45 | #endif // BOOST_STRONG_TYPEDEF_HPP
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