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 | |
20 | #include <boost/core/lightweight_test.hpp> |
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(ptr: boost_shared); |
125 | check_all_casts(ptr: plain); |
126 | |
127 | return boost::report_errors(); |
128 | } |
129 | |