1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
|
// Copyright (C) 2008-2018 Lorenzo Caminiti
// Distributed under the Boost Software License, Version 1.0 (see accompanying
// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
// Test overrides with mixed access levels from different (multiple) bases.
#include <boost/config.hpp>
#ifdef BOOST_MSVC
// WARNING: MSVC (at least up to VS 2015) gives a compile-time error if SFINAE
// cannot introspect a member because of its private or protected access level.
// That is incorrect, SFINAE should fail in these cases without generating
// compile-time errors like GCC and CLang do. Therefore, currently it is not
// possible to override a member that is public in one base but private or
// protected in other base using this library on MSVC (that can be done instead
// using this library on GCC or CLang).
int main() { return 0; } // This test trivially passes on MSVC.
#else
#include "../detail/oteststream.hpp"
#include <boost/contract/public_function.hpp>
#include <boost/contract/function.hpp>
#include <boost/contract/base_types.hpp>
#include <boost/contract/override.hpp>
#include <boost/contract/check.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <sstream>
boost::contract::test::detail::oteststream out;
struct c { // Test public access different from base `b`'s access below.
static void statci_inv() { out << "c::static_inv" << std::endl; }
void invariant() const { out << "c::inv" << std::endl; }
virtual void f(boost::contract::virtual_* v = 0) {
boost::contract::check c = boost::contract::public_function(v, this)
.precondition([] { out << "c::f::pre" << std::endl; })
.old([] { out << "c::f::old" << std::endl; })
.postcondition([] { out << "c::f::post" << std::endl; })
;
out << "c::f::body" << std::endl;
}
virtual void g(boost::contract::virtual_* v = 0) {
boost::contract::check c = boost::contract::public_function(v, this)
.precondition([] { out << "c::g::pre" << std::endl; })
.old([] { out << "c::g::old" << std::endl; })
.postcondition([] { out << "c::g::post" << std::endl; })
;
out << "c::g::body" << std::endl;
}
virtual void h(boost::contract::virtual_* v = 0) {
boost::contract::check c = boost::contract::public_function(v, this)
.precondition([] { out << "c::h::pre" << std::endl; })
.old([] { out << "c::h::old" << std::endl; })
.postcondition([] { out << "c::h::post" << std::endl; })
;
out << "c::h::body" << std::endl;
}
};
struct b { // Test all access levels (public, protected, and private).
friend void call(b& me) { // Test polymorphic calls (object by &).
me.f();
me.g();
me.h();
}
static void statci_inv() { out << "b::static_inv" << std::endl; }
void invariant() const { out << "b::inv" << std::endl; }
virtual void f(boost::contract::virtual_* v = 0) {
boost::contract::check c = boost::contract::public_function(v, this)
.precondition([] { out << "b::f::pre" << std::endl; })
.old([] { out << "b::f::old" << std::endl; })
.postcondition([] { out << "b::f::post" << std::endl; })
;
out << "b::f::body" << std::endl;
}
// NOTE: Both protected and private virtual members must declare
// extra `virtual_* = 0` parameter (otherwise they cannot be overridden in
// derived classes with contracts because C++ uses also default parameters
// to match signature of overriding functions).
protected:
virtual void g(boost::contract::virtual_* /* v */ = 0) {
boost::contract::check c = boost::contract::function()
.precondition([] { out << "b::g::pre" << std::endl; })
.old([] { out << "b::g::old" << std::endl; })
.postcondition([] { out << "b::g::post" << std::endl; })
;
out << "b::g::body" << std::endl;
}
private:
virtual void h(boost::contract::virtual_* /* v */ = 0) {
boost::contract::check c = boost::contract::function()
.precondition([] { out << "b::h::pre" << std::endl; })
.old([] { out << "b::h::old" << std::endl; })
.postcondition([] { out << "b::h::post" << std::endl; })
;
out << "b::h::body" << std::endl;
}
};
struct a // Test overrides with mixed access levels from different bases.
#define BASES public b, public c
: BASES
{
typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
#undef BASES
static void statci_inv() { out << "a::static_inv" << std::endl; }
void invariant() const { out << "a::inv" << std::endl; }
virtual void f(boost::contract::virtual_* v = 0) /* override */ {
boost::contract::check c = boost::contract::public_function<override_f>(
v, &a::f, this)
.precondition([] { out << "a::f::pre" << std::endl; })
.old([] { out << "a::f::old" << std::endl; })
.postcondition([] { out << "a::f::post" << std::endl; })
;
out << "a::f::body" << std::endl;
}
virtual void g(boost::contract::virtual_* v = 0) /* override */ {
boost::contract::check c = boost::contract::public_function<override_g>(
v, &a::g, this)
.precondition([] { out << "a::g::pre" << std::endl; })
.old([] { out << "a::g::old" << std::endl; })
.postcondition([] { out << "a::g::post" << std::endl; })
;
out << "a::g::body" << std::endl;
}
virtual void h(boost::contract::virtual_* v = 0) /* override */ {
boost::contract::check c = boost::contract::public_function<override_h>(
v, &a::h, this)
.precondition([] { out << "a::h::pre" << std::endl; })
.old([] { out << "a::h::old" << std::endl; })
.postcondition([] { out << "a::h::post" << std::endl; })
;
out << "a::h::body" << std::endl;
}
BOOST_CONTRACT_OVERRIDES(f, g, h)
};
int main() {
std::ostringstream ok;
b bb;
out.str("");
call(bb);
ok.str(""); ok
#ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
<< "b::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "b::f::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "b::f::old" << std::endl
#endif
<< "b::f::body" << std::endl
#ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
<< "b::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "b::f::post" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "b::g::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "b::g::old" << std::endl
#endif
<< "b::g::body" << std::endl
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "b::g::post" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "b::h::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "b::h::old" << std::endl
#endif
<< "b::h::body" << std::endl
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "b::h::post" << std::endl
#endif
;
BOOST_TEST(out.eq(ok.str()));
a aa;
out.str("");
call(aa);
ok.str(""); ok
#ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
<< "b::inv" << std::endl
<< "c::inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "b::f::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "b::f::old" << std::endl
<< "c::f::old" << std::endl
<< "a::f::old" << std::endl
#endif
<< "a::f::body" << std::endl
#ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
<< "b::inv" << std::endl
<< "c::inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "b::f::old" << std::endl
<< "b::f::post" << std::endl
<< "c::f::old" << std::endl
<< "c::f::post" << std::endl
<< "a::f::post" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
<< "c::inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "c::g::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "c::g::old" << std::endl
<< "a::g::old" << std::endl
#endif
<< "a::g::body" << std::endl
#ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
<< "c::inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "c::g::old" << std::endl
<< "c::g::post" << std::endl
<< "a::g::post" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
<< "c::inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "c::h::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "c::h::old" << std::endl
<< "a::h::old" << std::endl
#endif
<< "a::h::body" << std::endl
#ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
<< "c::inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "c::h::old" << std::endl
<< "c::h::post" << std::endl
<< "a::h::post" << std::endl
#endif
;
BOOST_TEST(out.eq(ok.str()));
return boost::report_errors();
}
#endif // MSVC
|
