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1 | // |
2 | // pointer_cast_test.cpp - a test for boost/pointer_cast.hpp | |
3 | // | |
4 | // Copyright (c) 2005 Ion Gaztanaga | |
5 | // Copyright (c) 2005 Peter Dimov | |
6 | // | |
7 | // Distributed under the Boost Software License, Version 1.0. (See | |
8 | // accompanying file LICENSE_1_0.txt or copy at | |
9 | // http://www.boost.org/LICENSE_1_0.txt) | |
10 | // | |
11 | ||
12 | #include <boost/config.hpp> | |
13 | ||
14 | #include <boost/pointer_cast.hpp> | |
15 | ||
16 | #include <boost/shared_ptr.hpp> | |
17 | #include <boost/scoped_ptr.hpp> | |
18 | #include <boost/get_pointer.hpp> | |
19 | ||
f67539c2 | 20 | #include <boost/core/lightweight_test.hpp> |
7c673cae FG |
21 | |
22 | namespace | |
23 | { | |
24 | ||
25 | // Let's create these inheritance relationship: | |
26 | // | |
27 | // base base2 | |
28 | // | | | |
29 | // derived | |
30 | // | | |
31 | // derived_derived | |
32 | // | |
33 | ||
34 | class base | |
35 | { | |
36 | public: | |
37 | virtual ~base(){} | |
38 | int filler [5]; | |
39 | }; | |
40 | ||
41 | class base2 | |
42 | { | |
43 | public: | |
44 | ||
45 | virtual ~base2(){} | |
46 | int filler [5]; | |
47 | }; | |
48 | ||
49 | class derived | |
50 | : public base, public base2 | |
51 | { | |
52 | int filler [5]; | |
53 | }; | |
54 | ||
55 | class derived_derived | |
56 | : public derived | |
57 | { | |
58 | int filler [5]; | |
59 | }; | |
60 | ||
61 | // And now some simple check functions | |
62 | ||
63 | #if !defined( BOOST_NO_RTTI ) | |
64 | ||
65 | template <class BasePtr> | |
66 | bool check_dynamic_pointer_cast(const BasePtr &ptr) | |
67 | { | |
68 | //Check that dynamic_pointer_cast versus dynamic_cast | |
69 | return | |
70 | //Correct cast with dynamic_pointer_cast | |
71 | boost::get_pointer(boost::dynamic_pointer_cast<derived>(ptr)) == | |
72 | //Correct cast with dynamic_cast | |
73 | dynamic_cast<derived*>(boost::get_pointer(ptr)) | |
74 | && | |
75 | //Incorrect cast with dynamic_pointer_cast | |
76 | boost::get_pointer(boost::dynamic_pointer_cast<derived_derived>(ptr)) == | |
77 | //Incorrect cast with dynamic_cast | |
78 | dynamic_cast<derived_derived*>(boost::get_pointer(ptr)); | |
79 | } | |
80 | ||
81 | #endif | |
82 | ||
83 | template <class BasePtr> | |
84 | bool check_static_pointer_cast(const BasePtr &ptr) | |
85 | { | |
86 | return | |
87 | //Cast base -> derived -> base2 using static_pointer_cast | |
88 | boost::get_pointer( | |
89 | boost::static_pointer_cast<base2>( | |
90 | boost::static_pointer_cast<derived>(ptr))) == | |
91 | //Now the same with static_cast | |
92 | static_cast<base2*>(static_cast<derived*>(boost::get_pointer(ptr))); | |
93 | } | |
94 | ||
95 | template <class BasePtr> | |
96 | bool check_const_pointer_cast(const BasePtr &ptr) | |
97 | { | |
98 | return | |
99 | //Unconst and const again using const_pointer_cast | |
100 | boost::get_pointer( | |
101 | boost::const_pointer_cast<const base> | |
102 | (boost::const_pointer_cast<base>(ptr))) == | |
103 | //Now the same with const_cast | |
104 | const_cast<const base*>(const_cast<base*>(boost::get_pointer(ptr))); | |
105 | } | |
106 | ||
107 | template <class BasePtr> | |
108 | void check_all_casts(const BasePtr &ptr) | |
109 | { | |
110 | #if !defined( BOOST_NO_RTTI ) | |
111 | BOOST_TEST( check_dynamic_pointer_cast( ptr ) ); | |
112 | #endif | |
113 | BOOST_TEST( check_static_pointer_cast( ptr ) ); | |
114 | BOOST_TEST( check_const_pointer_cast( ptr ) ); | |
115 | } | |
116 | ||
117 | } | |
118 | ||
119 | int main() | |
120 | { | |
121 | boost::shared_ptr<base> boost_shared(new derived); | |
122 | base *plain = boost_shared.get(); | |
123 | ||
124 | check_all_casts(boost_shared); | |
125 | check_all_casts(plain); | |
126 | ||
127 | return boost::report_errors(); | |
128 | } |