12 | | // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . |
13 | | // Use, modification and distribution is subject to the Boost Software |
14 | | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
15 | | // http://www.boost.org/LICENSE_1_0.txt) |
16 | | |
17 | | // See http://www.boost.org/libs/serialization for updates, documentation, and revision history. |
18 | | |
19 | | // macro used to implement a strong typedef. strong typedef |
20 | | // guarentees that two types are distinguised even though the |
21 | | // share the same underlying implementation. typedef does not create |
22 | | // a new type. BOOST_STRONG_TYPEDEF(T, D) creates a new type named D |
23 | | // that operates as a type T. |
24 | | |
25 | | #include <boost/config.hpp> |
26 | | #include <boost/operators.hpp> |
27 | | |
28 | | #if !defined(__BORLANDC__) || __BORLANDC__ >= 0x590 |
29 | | #define BOOST_STRONG_TYPEDEF(T, D) \ |
30 | | struct D \ |
31 | | : boost::totally_ordered1< D \ |
32 | | , boost::totally_ordered2< D, T \ |
33 | | > > \ |
34 | | { \ |
35 | | T t; \ |
36 | | explicit D(const T t_) : t(t_) {}; \ |
37 | | D(){}; \ |
38 | | D(const D & t_) : t(t_.t){} \ |
39 | | D & operator=(const D & rhs) { t = rhs.t; return *this;} \ |
40 | | D & operator=(const T & rhs) { t = rhs; return *this;} \ |
41 | | operator const T & () const {return t; } \ |
42 | | operator T & () { return t; } \ |
43 | | bool operator==(const D & rhs) const { return t == rhs.t; } \ |
44 | | bool operator<(const D & rhs) const { return t < rhs.t; } \ |
45 | | }; |
46 | | #else |
47 | | #define BOOST_STRONG_TYPEDEF(T, D) \ |
48 | | struct D \ |
49 | | : boost::totally_ordered1< D \ |
50 | | , boost::totally_ordered2< D, T \ |
51 | | > > \ |
52 | | { \ |
53 | | T t; \ |
54 | | explicit D(const T t_) : t(t_) {}; \ |
55 | | D(){}; \ |
56 | | D(const D & t_) : t(t_.t){} \ |
57 | | D & operator=(const D & rhs) { t = rhs.t; return *this;} \ |
58 | | D & operator=(const T & rhs) { t = rhs; return *this;} \ |
59 | | /*operator const T & () const {return t; }*/ \ |
60 | | operator T & () { return t; } \ |
61 | | bool operator==(const D & rhs) const { return t == rhs.t; } \ |
62 | | bool operator<(const D & rhs) const { return t < rhs.t; } \ |
63 | | }; |
64 | | #endif // !defined(__BORLANDC) || __BORLANDC__ >= 0x590 |
65 | | |