-
Notifications
You must be signed in to change notification settings - Fork 6
/
observer_ptr.t.cpp
473 lines (386 loc) · 11.3 KB
/
observer_ptr.t.cpp
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
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
// Copyright 2018-2019 by Martin Moene
//
// nonstd::observer_ptr<> is a C++98 onward implementation for std::observer_ptr as of C++17.
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "observer_ptr-main.t.hpp"
#include <iostream>
using namespace nonstd;
namespace {
CASE( "Disallows to delete the observer_ptr unless implicit conversion allowed" )
{
#if nsop_CONFIG_CONFIRMS_COMPILATION_ERRORS
int a = 7;
observer_ptr<int> ap( &a );
delete ap;
#else
EXPECT( true );
#endif
}
CASE( "Disallows construction from an observer_ptr of incompatible type" )
{
#if nsop_CONFIG_CONFIRMS_COMPILATION_ERRORS
int a = 7;
observer_ptr<int> ap( &a );
observer_ptr<long> bp( ap );
#else
EXPECT( true );
#endif
}
CASE( "Disallows implicit conversion to bool unless implicit conversion allowed" )
{
#if nsop_CONFIG_CONFIRMS_COMPILATION_ERRORS
# if nsop_HAVE_EXPLICIT_CONVERSION
EXPECT( !!"no compilation failure: implicit conversion never used for C++11 (see nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_TO_UNDERLYING_TYPE)" );
# elif nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_TO_UNDERLYING_TYPE
EXPECT( !!"no compilation failure: implicit conversion allowed for pre-C++11 (see nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_TO_UNDERLYING_TYPE)" );
# endif
int a = 7;
observer_ptr<int> ap( &a );
if ( ap ) {}
#else
EXPECT( true );
#endif
}
CASE( "Disallows implicit conversion to underlying type unless implicit conversion allowed" )
{
#if nsop_CONFIG_CONFIRMS_COMPILATION_ERRORS
# if nsop_HAVE_EXPLICIT_CONVERSION
EXPECT( !!"no compilation failure: implicit conversion never used for C++11 (see nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_TO_UNDERLYING_TYPE)" );
# elif nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_TO_UNDERLYING_TYPE
EXPECT( !!"no compilation failure: implicit conversion allowed for pre-C++11 (see nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_TO_UNDERLYING_TYPE)" );
# endif
struct F { static void use( int * ) {} };
int a = 7;
observer_ptr<int> ap( &a );
F::use( ap );
#else
EXPECT( true );
#endif
}
CASE( "Disallows comparison to an observer_ptr with a different underlying type" )
{
#if nsop_CONFIG_CONFIRMS_COMPILATION_ERRORS
int a = 7; observer_ptr<int > ap( &a );
long b = 9; observer_ptr<long> bp( &b );
if ( ap == bp ) {}
if ( ap != bp ) {}
#else
EXPECT( true );
#endif
}
CASE( "Allows default construction" )
{
observer_ptr<int> p;
#if nsop_HAVE_NULLPTR
EXPECT( p.get() == nullptr );
#else
EXPECT( p.get() == (void*)NULL );
#endif
}
CASE( "Allows construction from nullptr" )
{
#if nsop_HAVE_NULLPTR
observer_ptr<int> p( nullptr );
EXPECT( p.get() == nullptr );
#else
EXPECT( !!"nullptr is not available (no C++11)" );
#endif
}
CASE( "Allows construction from a non-null pointer" )
{
int a = 7;
observer_ptr<int> ap( &a );
EXPECT( *ap == a );
}
CASE( "Allows construction from an observer_ptr of compatible type" )
{
#if nsop_COMPILER_MSVC_VERSION != 6
int a = 7;
observer_ptr<int> ap( &a );
observer_ptr<const int> bp( ap );
EXPECT( *bp == a );
#else
EXPECT( !!"not in VC6 " );
#endif
}
CASE( "Allows implicit move-construction from a std::unique_ptr<>" " [smart-ptr]" )
{
#if nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_FROM_UNIQUE_PTR
#if nsop_HAVE_STD_SMART_PTRS
auto up = std::unique_ptr<int>( new int(42) );
observer_ptr<int> op( std::move(up) );
EXPECT( *op == 42 );
#else
EXPECT( !!"std::unique_ptr<> is not available (no C++11)" );
#endif
#else
EXPECT( !!"observer_ptr: implicit conversion from smart pointers is not enabled (nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_FROM_UNIQUE_PTR)" );
#endif
}
CASE( "Allows implicit construction from a std::shared_ptr<>" " [smart-ptr]" )
{
#if nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_FROM_SHARED_PTR
#if nsop_HAVE_STD_SMART_PTRS
auto sp = std::make_shared<int>( 42 );
observer_ptr<int> op( sp );
EXPECT( *op == 42 );
#else
EXPECT( !!"std::shared_ptr<> is not available (no C++11)" );
#endif
#else
EXPECT( !!"observer_ptr: implicit conversion from smart pointers is not enabled (nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_FROM_SHARED_PTR)" );
#endif
}
CASE( "Allows to retrieve the pointer" )
{
int a = 7;
observer_ptr<int> ap( &a );
EXPECT( ap.get() == &a );
}
CASE( "Allows to retrieve the value pointed to" )
{
int a = 7;
observer_ptr<int> ap( &a );
EXPECT( *ap == a );
}
struct S { S():a(7){} int a; };
CASE( "Allows to retrieve the member pointed to" )
{
S s;
observer_ptr<S> sp( &s );
EXPECT( sp->a == s.a );
}
CASE( "Allows to test for a non-null pointer via conversion to bool" )
{
int a = 7;
observer_ptr<int> ap( &a );
if ( ap ) {}
EXPECT( !!ap );
}
CASE( "Allows to convert to the observed pointer" )
{
#if nsop_HAVE_EXPLICIT_CONVERSION || nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_TO_UNDERLYING_TYPE
int a = 7;
observer_ptr<int> ap( &a );
int * q( ap );
EXPECT( q == &a );
#else
EXPECT( !!"no explicit (no C++11) or implicit conversion (see nsop_CONFIG_ALLOW_IMPLICIT_CONVERSION_TO_UNDERLYING_TYPE)" );
#endif
}
CASE( "Allows to reset to stop observing" )
{
int a = 7;
observer_ptr<int> ap( &a );
ap.reset();
EXPECT( ap.get() == reinterpret_cast<void*>( NULL ) );
}
CASE( "Allows to reset to observe another pointer" )
{
int a = 7;
observer_ptr<int> ap;
ap.reset( &a );
EXPECT( ap.get() == &a );
}
CASE( "Allows to swap two observers" )
{
int a = 7, b = 9;
observer_ptr<int> ap( &a );
observer_ptr<int> bp( &b );
ap.swap( bp );
EXPECT( ap.get() == &b );
EXPECT( bp.get() == &a );
EXPECT( *ap == b );
EXPECT( *bp == a );
}
// specialized algorithms:
CASE( "Specialized: Allows to swap two observers" )
{
int a = 7, b = 9;
observer_ptr<int> ap( &a );
observer_ptr<int> bp( &b );
swap( ap, bp );
EXPECT( ap.get() == &b );
EXPECT( bp.get() == &a );
EXPECT( *ap == b );
EXPECT( *bp == a );
}
CASE( "Specialized: Allows to make an observer" )
{
int a = 7;
EXPECT( *make_observer( &a ) == a );
}
CASE( "Specialized: Allows to compare if an observer is equal to another observer" )
{
#if nsop_COMPILER_MSVC_VERSION != 6
int a = 7, b = 9;
observer_ptr<int> ap( &a );
observer_ptr<int> bp( &b );
EXPECT( ap == ap );
EXPECT_NOT( ap == bp );
#else
EXPECT( !!"op== yields 'operator ==' is ambiguous for VC6 " );
#endif
}
CASE( "Specialized: Allows to compare if an observer is equal to another observer with a related watched type" )
{
#if nsop_COMPILER_MSVC_VERSION != 6
int a = 7, b = 9;
observer_ptr< int> ap( &a );
observer_ptr<const int> bp( &b );
EXPECT( ap == ap );
EXPECT_NOT( ap == bp );
#else
EXPECT( !!"op== yields 'operator ==' is ambiguous for VC6 " );
#endif
}
CASE( "Specialized: Allows to compare if an observer is not equal to another observer" )
{
#if nsop_COMPILER_MSVC_VERSION != 6
int a = 7, b= 9;
observer_ptr<int> ap( &a );
observer_ptr<int> bp( &b );
EXPECT( ap != bp );
EXPECT_NOT( ap != ap );
#else
EXPECT( !!"op== yields 'operator !=' is ambiguous for VC6 " );
#endif
}
CASE( "Specialized: Allows to compare if an observer is not equal to another observer with a related watched type" )
{
#if nsop_COMPILER_MSVC_VERSION != 6
int a = 7, b= 9;
observer_ptr<int> ap( &a );
observer_ptr<const int> bp( &b );
EXPECT( ap != bp );
EXPECT_NOT( ap != ap );
#else
EXPECT( !!"op== yields 'operator !=' is ambiguous for VC6 " );
#endif
}
CASE( "Specialized: Allows to compare if an observer is equal to nullptr" )
{
#if nsop_HAVE_NULLPTR
int a = 7;
observer_ptr<int> p;
observer_ptr<int> q( &a );
EXPECT( p == nullptr );
EXPECT_NOT( q == nullptr );
EXPECT( nullptr == p );
EXPECT_NOT( nullptr == q );
#else
EXPECT( !!"nullptr is not available (no C++11)" );
#endif
}
CASE( "Specialized: Allows to compare if an observer is not equal to nullptr" )
{
#if nsop_HAVE_NULLPTR
int a = 7;
observer_ptr<int> p( &a );
observer_ptr<int> q;
EXPECT( p != nullptr );
EXPECT_NOT( q != nullptr );
EXPECT( nullptr != p );
EXPECT_NOT( nullptr != q );
#else
EXPECT( !!"nullptr is not available (no C++11)" );
#endif
}
CASE( "Specialized: Allows to compare if an observer is less than another observer" )
{
int arr[] = { 7, 9, };
observer_ptr<int> p1( &arr[0] );
observer_ptr<int> p2( &arr[1] );
EXPECT( p1 < p2 );
EXPECT_NOT( p2 < p1 );
}
CASE( "Specialized: Allows to compare if an observer is less than another observer with a related watched type" )
{
#if nsop_HAVE_OWN_COMMON_TYPE_STD
int arr[] = { 7, 9, };
observer_ptr< int> p1( &arr[0] );
observer_ptr<const int> p2( &arr[1] );
EXPECT( p1 < p2 );
EXPECT_NOT( p2 < p1 );
#else
EXPECT( !!"common_type is not available (no C++11, no VC12, 13, 14)" );
#endif
}
CASE( "Specialized: Allows to compare if an observer is less than or equal to another observer" )
{
int arr[] = { 7, 9, };
observer_ptr<int> p1( &arr[0] );
observer_ptr<int> p2( &arr[1] );
EXPECT( p1 <= p1 );
EXPECT( p1 <= p2 );
EXPECT_NOT( p2 <= p1 );
}
CASE( "Specialized: Allows to compare if an observer is less than or equal to another observer with a related watched type" )
{
#if nsop_HAVE_OWN_COMMON_TYPE_STD
int arr[] = { 7, 9, };
observer_ptr< int> p1( &arr[0] );
observer_ptr<const int> p2( &arr[1] );
EXPECT( p1 <= p1 );
EXPECT( p1 <= p2 );
EXPECT_NOT( p2 <= p1 );
#else
EXPECT( !!"common_type is not available (no C++11, no VC12, 13, 14)" );
#endif
}
CASE( "Specialized: Allows to compare if an observer is greater than another observer" )
{
int arr[] = { 7, 9, };
observer_ptr<int> p1( &arr[0] );
observer_ptr<int> p2( &arr[1] );
EXPECT( p2 > p1 );
EXPECT_NOT( p1 > p2 );
}
CASE( "Specialized: Allows to compare if an observer is greater than another observer with a related watched type" )
{
#if nsop_HAVE_OWN_COMMON_TYPE_STD
int arr[] = { 7, 9, };
observer_ptr< int> p1( &arr[0] );
observer_ptr<const int> p2( &arr[1] );
EXPECT( p2 > p1 );
EXPECT_NOT( p1 > p2 );
#else
EXPECT( !!"common_type is not available (no C++11, no VC12, 13, 14)" );
#endif
}
CASE( "Specialized: Allows to compare if an observer is greater than or equal to another observer" )
{
int arr[] = { 7, 9, };
observer_ptr<int> p1( &arr[0] );
observer_ptr<int> p2( &arr[1] );
EXPECT( p1 >= p1 );
EXPECT( p2 >= p1 );
EXPECT_NOT( p1 >= p2 );
}
CASE( "Specialized: Allows to compare if an observer is greater than or equal to another observer with a related watched type" )
{
#if nsop_HAVE_OWN_COMMON_TYPE_STD
int arr[] = { 7, 9, };
observer_ptr< int> p1( &arr[0] );
observer_ptr<const int> p2( &arr[1] );
EXPECT( p1 >= p1 );
EXPECT( p2 >= p1 );
EXPECT_NOT( p1 >= p2 );
#else
EXPECT( !!"common_type is not available (no C++11, no VC12, 13, 14)" );
#endif
}
CASE( "Specialized: Allows to compute hash" )
{
#if nsop_CPP11_OR_GREATER
int a = 7;
EXPECT( std::hash< observer_ptr<int> >()( make_observer( &a ) ) );
#else
EXPECT( !!"hash is not available (no C++11)" );
#endif // nsop_CPP11_OR_GREATER
}
} // namespace
// end of file