1 | // RUN: %clang_cc1 -std=c++98 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking |
2 | // RUN: %clang_cc1 -std=c++11 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking |
3 | // RUN: %clang_cc1 -std=c++14 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking |
4 | // RUN: %clang_cc1 -std=c++17 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking |
5 | // RUN: %clang_cc1 -std=c++2a %s -verify -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking |
6 | |
7 | namespace std { |
8 | struct type_info {}; |
9 | __extension__ typedef __SIZE_TYPE__ size_t; |
10 | } // namespace std |
11 | |
12 | namespace dr601 { // dr601: yes |
13 | #if __cplusplus >= 201103L |
14 | #define MAX __LLONG_MAX__ |
15 | #else |
16 | #define MAX __LONG_MAX__ |
17 | #endif |
18 | |
19 | #if 0x8000 < -1 |
20 | #error 0x8000 should be signed |
21 | #endif |
22 | |
23 | #if MAX > 0xFFFFFFFF && 0x80000000 < -1 |
24 | #error 0x80000000 should be signed |
25 | #endif |
26 | |
27 | #if __INT_MAX__ == 0x7FFFFFFF |
28 | _Static_assert(0x80000000 < -1, "0x80000000 should be unsigned"); // expected-error {{C11}} |
29 | #endif |
30 | |
31 | #if MAX > 0xFFFFFFFFFFFFFFFF && 0x8000000000000000 < -1 |
32 | #error 0x8000000000000000 should be signed |
33 | #endif |
34 | |
35 | #if __cplusplus >= 201103L && __LLONG_MAX__ == 0x7FFFFFFFFFFFFFFF |
36 | static_assert(0x8000000000000000 < -1, "0x8000000000000000 should be unsigned"); // expected-error {{C11}} |
37 | #endif |
38 | |
39 | #undef MAX |
40 | } |
41 | |
42 | namespace dr602 { // dr602: yes |
43 | template<class T> struct A { |
44 | template<class U> friend struct A; |
45 | }; |
46 | |
47 | template<class T> struct B { |
48 | class C { |
49 | template<class U> friend struct B; |
50 | typedef int type; |
51 | }; |
52 | typename C::type ct; // ok, befriended |
53 | }; |
54 | B<int> b; |
55 | } |
56 | |
57 | namespace dr603 { // dr603: yes |
58 | template<unsigned char> struct S {}; |
59 | typedef S<'\001'> S1; |
60 | typedef S<(1ul << __CHAR_BIT__) + 1> S1; |
61 | #if __cplusplus >= 201103L |
62 | // expected-error@-2 {{cannot be narrowed}} |
63 | #endif |
64 | } |
65 | |
66 | // dr604: na |
67 | // dr605 needs IRGen test |
68 | |
69 | namespace dr606 { // dr606: yes |
70 | #if __cplusplus >= 201103L |
71 | template<typename T> struct S {}; |
72 | template<typename T> void f(S<T> &&); // expected-note {{no known conversion from 'S<int>' to 'S<int> &&'}} |
73 | template<typename T> void g(T &&); |
74 | template<typename T> void h(const T &&); // expected-note {{no known conversion from 'S<int>' to 'const dr606::S<int> &&'}} |
75 | |
76 | void test(S<int> s) { |
77 | f(s); // expected-error {{no match}} |
78 | g(s); |
79 | h(s); // expected-error {{no match}} |
80 | |
81 | g(test); |
82 | h(test); // ok, an rvalue reference can bind to a function lvalue |
83 | } |
84 | #endif |
85 | } |
86 | |
87 | namespace dr608 { // dr608: yes |
88 | struct A { virtual void f(); }; |
89 | struct B : A {}; |
90 | struct C : A { void f(); }; |
91 | struct D : B, C {}; |
92 | } |
93 | |
94 | int dr610[-0u == 0u ? 1 : -1]; // dr610: yes |
95 | |
96 | namespace dr611 { // dr611: yes |
97 | int k; |
98 | struct S { int &r; } s = { k ? k : k }; |
99 | } |
100 | |
101 | // dr612: na |
102 | |
103 | namespace dr613 { // dr613: yes c++11 |
104 | // see also n2253 |
105 | struct A { int n; static void f(); }; |
106 | int f(int); |
107 | struct B { virtual void f(); }; |
108 | B &g(int); |
109 | |
110 | int an1 = sizeof(A::n); |
111 | int an2 = sizeof(A::n + 1); // valid per dr850 |
112 | int an3 = sizeof A::n; |
113 | int an4 = sizeof(f(A::n)); |
114 | int an5 = sizeof(g(A::n)); |
115 | const std::type_info &an6 = typeid(A::n); |
116 | const std::type_info &an7 = typeid(A::n + 1); |
117 | const std::type_info &an8 = typeid(f(A::n)); |
118 | const std::type_info &an9 = typeid(g(A::n)); // expected-error {{non-static}} |
119 | #if __cplusplus < 201103L |
120 | // expected-error@-10 {{non-static}} |
121 | // expected-error@-10 {{non-static}} |
122 | // expected-error@-10 {{non-static}} |
123 | // expected-error@-10 {{non-static}} |
124 | // expected-error@-10 {{non-static}} |
125 | // expected-error@-10 {{non-static}} |
126 | // expected-error@-10 {{non-static}} |
127 | // expected-error@-10 {{non-static}} |
128 | #endif |
129 | |
130 | void A::f() { |
131 | int an1 = sizeof n; |
132 | const std::type_info &an2 = typeid(n + 1); |
133 | #if __cplusplus < 201103L |
134 | // expected-error@-3 {{static}} |
135 | // expected-error@-3 {{static}} |
136 | #endif |
137 | const std::type_info &an3 = typeid(g(n)); // expected-error {{static}} |
138 | } |
139 | } |
140 | |
141 | int dr614_a[(-1) / 2 == 0 ? 1 : -1]; // dr614: yes |
142 | int dr614_b[(-1) % 2 == -1 ? 1 : -1]; |
143 | |
144 | namespace dr615 { // dr615: yes |
145 | int f(); |
146 | static int n = f(); |
147 | } |
148 | |
149 | namespace dr616 { // dr616: 4 |
150 | #if __cplusplus >= 201103L |
151 | struct S { int n; } s; |
152 | S f(); |
153 | using T = decltype((S().n)); |
154 | using T = decltype((static_cast<S&&>(s).n)); |
155 | using T = decltype((f().n)); |
156 | using T = decltype(S().*&S::n); |
157 | using T = decltype(static_cast<S&&>(s).*&S::n); |
158 | using T = decltype(f().*&S::n); |
159 | using T = int&&; |
160 | |
161 | using U = decltype(S().n); |
162 | using U = decltype(static_cast<S&&>(s).n); |
163 | using U = int; |
164 | #endif |
165 | } |
166 | |
167 | namespace dr618 { // dr618: yes |
168 | #if (unsigned)-1 > 0 |
169 | #error wrong |
170 | #endif |
171 | } |
172 | |
173 | namespace dr619 { // dr619: yes |
174 | extern int x[10]; |
175 | struct S { static int x[10]; }; |
176 | |
177 | int x[]; |
178 | _Static_assert(sizeof(x) == sizeof(int) * 10, ""); // expected-error {{C11}} |
179 | extern int x[]; |
180 | _Static_assert(sizeof(x) == sizeof(int) * 10, ""); // expected-error {{C11}} |
181 | |
182 | int S::x[]; |
183 | _Static_assert(sizeof(S::x) == sizeof(int) * 10, ""); // expected-error {{C11}} |
184 | |
185 | void f() { |
186 | extern int x[]; |
187 | sizeof(x); // expected-error {{incomplete}} |
188 | } |
189 | } |
190 | |
191 | // dr620: dup 568 |
192 | |
193 | namespace dr621 { |
194 | template<typename T> T f(); |
195 | template<> int f() {} // expected-note {{previous}} |
196 | template<> int f<int>() {} // expected-error {{redefinition}} |
197 | } |
198 | |
199 | // dr623: na |
200 | // FIXME: Add documentation saying we allow invalid pointer values. |
201 | |
202 | // dr624 needs an IRGen check. |
203 | |
204 | namespace dr625 { // dr625: yes |
205 | template<typename T> struct A {}; |
206 | A<auto> x = A<int>(); // expected-error {{'auto' not allowed in template argument}} expected-error 0-1{{extension}} |
207 | void f(int); |
208 | void (*p)(auto) = f; // expected-error {{'auto' not allowed in function prototype}} expected-error 0-1{{extension}} |
209 | } |
210 | |
211 | namespace dr626 { // dr626: yes |
212 | #define STR(x) #x |
213 | char c[2] = STR(c); // ok, type matches |
214 | wchar_t w[2] = STR(w); // expected-error {{initializing wide char array with non-wide string literal}} |
215 | } |
216 | |
217 | namespace dr627 { // dr627: yes |
218 | void f() { |
219 | true a = 0; // expected-error +{{}} expected-warning {{unused}} |
220 | } |
221 | } |
222 | |
223 | // dr628: na |
224 | |
225 | namespace dr629 { // dr629: yes |
226 | typedef int T; |
227 | int n = 1; |
228 | void f() { |
229 | auto T = 2; |
230 | #if __cplusplus < 201103L |
231 | // expected-error@-2 {{expected unqualified-id}} |
232 | #else |
233 | // expected-note@-4 {{previous}} |
234 | #endif |
235 | |
236 | auto T(n); |
237 | #if __cplusplus >= 201103L |
238 | // expected-error@-2 {{redefinition of 'T'}} |
239 | #endif |
240 | } |
241 | } |
242 | |
243 | namespace dr630 { // dr630: yes |
244 | const bool MB_EQ_WC = |
245 | ' ' == L' ' && '\t' == L'\t' && '\v' == L'\v' && '\r' == L'\r' && |
246 | '\n' == L'\n' && // |
247 | 'a' == L'a' && 'b' == L'b' && 'c' == L'c' && 'd' == L'd' && 'e' == L'e' && |
248 | 'f' == L'f' && 'g' == L'g' && 'h' == L'h' && 'i' == L'i' && 'j' == L'j' && |
249 | 'k' == L'k' && 'l' == L'l' && 'm' == L'm' && 'n' == L'n' && 'o' == L'o' && |
250 | 'p' == L'p' && 'q' == L'q' && 'r' == L'r' && 's' == L's' && 't' == L't' && |
251 | 'u' == L'u' && 'v' == L'v' && 'w' == L'w' && 'x' == L'x' && 'y' == L'y' && |
252 | 'z' == L'z' && // |
253 | 'A' == L'A' && 'B' == L'B' && 'C' == L'C' && 'D' == L'D' && 'E' == L'E' && |
254 | 'F' == L'F' && 'G' == L'G' && 'H' == L'H' && 'I' == L'I' && 'J' == L'J' && |
255 | 'K' == L'K' && 'L' == L'L' && 'M' == L'M' && 'N' == L'N' && 'O' == L'O' && |
256 | 'P' == L'P' && 'Q' == L'Q' && 'R' == L'R' && 'S' == L'S' && 'T' == L'T' && |
257 | 'U' == L'U' && 'V' == L'V' && 'W' == L'W' && 'X' == L'X' && 'Y' == L'Y' && |
258 | 'Z' == L'Z' && // |
259 | '0' == L'0' && '1' == L'1' && '2' == L'2' && '3' == L'3' && '4' == L'4' && |
260 | '5' == L'5' && '6' == L'6' && '7' == L'7' && '8' == L'8' && |
261 | '9' == L'9' && // |
262 | '_' == L'_' && '{' == L'{' && '}' == L'}' && '[' == L'[' && ']' == L']' && |
263 | '#' == L'#' && '(' == L'(' && ')' == L')' && '<' == L'<' && '>' == L'>' && |
264 | '%' == L'%' && ':' == L':' && ';' == L';' && '.' == L'.' && '?' == L'?' && |
265 | '*' == L'*' && '+' == L'+' && '-' == L'-' && '/' == L'/' && '^' == L'^' && |
266 | '&' == L'&' && '|' == L'|' && '~' == L'~' && '!' == L'!' && '=' == L'=' && |
267 | ',' == L',' && '\\' == L'\\' && '"' == L'"' && '\'' == L'\''; |
268 | #if __STDC_MB_MIGHT_NEQ_WC__ |
269 | #ifndef __FreeBSD__ // PR22208, FreeBSD expects us to give a bad (but conforming) answer here. |
270 | _Static_assert(!MB_EQ_WC, "__STDC_MB_MIGHT_NEQ_WC__ but all basic source characters have same representation"); // expected-error {{C11}} |
271 | #endif |
272 | #else |
273 | _Static_assert(MB_EQ_WC, "!__STDC_MB_MIGHT_NEQ_WC__ but some character differs"); // expected-error {{C11}} |
274 | #endif |
275 | } |
276 | |
277 | // dr631: na |
278 | |
279 | namespace dr632 { // dr632: yes |
280 | struct S { int n; } s = {{5}}; // expected-warning {{braces}} |
281 | } |
282 | |
283 | // dr633: na |
284 | // see also n2993 |
285 | |
286 | namespace dr634 { // dr634: yes |
287 | struct S { S(); S(const S&); virtual void f(); ~S(); }; |
288 | int f(...); |
289 | char f(int); |
290 | template<typename T> int (&g(T))[sizeof f(T())]; |
291 | int (&a)[sizeof(int)] = g(S()); |
292 | int (&b)[1] = g(0); |
293 | int k = f(S()); // expected-error {{cannot pass}} |
294 | } |
295 | |
296 | namespace dr635 { // dr635: yes |
297 | template<typename T> struct A { A(); ~A(); }; |
298 | template<typename T> A<T>::A<T>() {} // expected-error {{cannot have template arguments}} |
299 | template<typename T> A<T>::~A<T>() {} |
300 | |
301 | template<typename T> struct B { B(); ~B(); }; |
302 | template<typename T> B<T>::B() {} |
303 | template<typename T> B<T>::~B() {} |
304 | |
305 | struct C { template<typename T> C(); C(); }; |
306 | template<typename T> C::C() {} |
307 | C::C() {} |
308 | template<> C::C<int>() {} // expected-error {{constructor name}} expected-error {{unqualified-id}} |
309 | /*FIXME: needed for error recovery:*/; |
310 | |
311 | template<typename T> struct D { template<typename U> D(); D(); }; |
312 | template<typename T> D<T>::D() {} // expected-note {{previous}} |
313 | template<typename T> template<typename U> D<T>::D() {} |
314 | template<typename T> D<T>::D<T>() {} // expected-error {{redefinition}} expected-error {{cannot have template arg}} |
315 | } |
316 | |
317 | namespace dr637 { // dr637: yes |
318 | void f(int i) { |
319 | i = ++i + 1; |
320 | i = i++ + 1; // expected-warning {{unsequenced}} |
321 | } |
322 | } |
323 | |
324 | namespace dr638 { // dr638: no |
325 | template<typename T> struct A { |
326 | struct B; |
327 | void f(); |
328 | void g(); |
329 | struct C { |
330 | void h(); |
331 | }; |
332 | }; |
333 | |
334 | class X { |
335 | typedef int type; |
336 | template<class T> friend struct A<T>::B; // expected-warning {{not supported}} |
337 | template<class T> friend void A<T>::f(); // expected-warning {{not supported}} |
338 | template<class T> friend void A<T>::g(); // expected-warning {{not supported}} |
339 | template<class T> friend void A<T>::C::h(); // expected-warning {{not supported}} |
340 | }; |
341 | |
342 | template<> struct A<int> { |
343 | X::type a; // FIXME: private |
344 | struct B { |
345 | X::type b; // ok |
346 | }; |
347 | int f() { X::type c; } // FIXME: private |
348 | void g() { X::type d; } // ok |
349 | struct D { |
350 | void h() { X::type e; } // FIXME: private |
351 | }; |
352 | }; |
353 | } |
354 | |
355 | namespace dr639 { // dr639: yes |
356 | void f(int i) { |
357 | void((i = 0) + (i = 0)); // expected-warning {{unsequenced}} |
358 | } |
359 | } |
360 | |
361 | namespace dr641 { // dr641: yes |
362 | namespace std_example { |
363 | struct abc; |
364 | |
365 | struct xyz { |
366 | xyz(); // expected-note 0-1{{candidate}} |
367 | xyz(xyz &); // expected-note 0-1{{candidate}} |
368 | |
369 | operator xyz &() = delete; // expected-error 0-1{{extension}} expected-warning {{will never be used}} |
370 | operator abc &() = delete; // expected-error 0-1{{extension}} |
371 | }; |
372 | |
373 | struct abc : xyz {}; |
374 | |
375 | template<typename T> |
376 | void use(T &); // expected-note {{expects an l-value}} |
377 | void test() { |
378 | use<xyz>(xyz()); // expected-error {{no match}} |
379 | use<const xyz>(xyz()); |
380 | #if __cplusplus < 201103L |
381 | // expected-error-re@-2 {{no viable constructor copying parameter of type '{{.*}}xyz'}} |
382 | #endif |
383 | } |
384 | } |
385 | |
386 | template<typename T> struct error { typedef typename T::error type; }; |
387 | |
388 | struct A { |
389 | template<typename T, typename error<T>::type = 0> operator T() const; // expected-error 0-1{{extension}} |
390 | }; |
391 | A a; |
392 | void f(A&); // expected-note 2{{candidate}} |
393 | void g(const A ca) { |
394 | f(A()); // expected-error {{no match}} |
395 | f(ca); // expected-error {{no match}} |
396 | (void)A(); |
397 | (void)ca; |
398 | } |
399 | } |
400 | |
401 | namespace dr642 { // dr642: yes |
402 | void f() { |
403 | const int i = 2; |
404 | { |
405 | char i[i]; |
406 | _Static_assert(sizeof(i) == 2, ""); // expected-error {{C11}} |
407 | } |
408 | } |
409 | |
410 | struct s { int a; }; |
411 | void g(int s) { |
412 | struct s *p = new struct s; |
413 | p->a = s; |
414 | } |
415 | } |
416 | |
417 | #if __cplusplus >= 201103L |
418 | namespace dr643 { // dr643: yes |
419 | struct A { |
420 | int x; |
421 | auto f() -> decltype(this->x); |
422 | auto f(A &a) -> decltype(a.x); |
423 | auto g() -> decltype(x); |
424 | auto h() -> decltype(this->y); // expected-error {{no member named 'y'}} |
425 | auto h(A &a) -> decltype(a.y); // expected-error {{no member named 'y'}} |
426 | auto i() -> decltype(y); // expected-error {{undeclared identifier 'y'}} |
427 | int y; |
428 | }; |
429 | } |
430 | #endif |
431 | |
432 | #if __cplusplus >= 201103L |
433 | namespace dr644 { // dr644: partial |
434 | struct A { |
435 | A() = default; |
436 | int x, y; |
437 | }; |
438 | static_assert(__is_literal_type(A), ""); |
439 | |
440 | struct B : A {}; |
441 | static_assert(__is_literal_type(B), ""); |
442 | |
443 | struct C : virtual A {}; |
444 | static_assert(!__is_literal_type(C), ""); |
445 | |
446 | struct D { C c; }; |
447 | static_assert(!__is_literal_type(D), ""); |
448 | |
449 | // FIXME: According to DR644, E<C> is a literal type despite having virtual |
450 | // base classes. This appears to be a wording defect. |
451 | template<typename T> |
452 | struct E : T { |
453 | constexpr E() = default; |
454 | }; |
455 | static_assert(!__is_literal_type(E<C>), ""); |
456 | } |
457 | #endif |
458 | |
459 | // dr645 increases permission to optimize; it's not clear that it's possible to |
460 | // test for this. |
461 | // dr645: na |
462 | |
463 | #if __cplusplus >= 201103L |
464 | namespace dr646 { // dr646: sup 981 |
465 | struct A { |
466 | constexpr A(const A&) = default; // ok |
467 | }; |
468 | |
469 | struct B { |
470 | constexpr B() {} |
471 | B(B&); |
472 | }; |
473 | constexpr B b = {}; // ok |
474 | } |
475 | #endif |
476 | |
477 | #if __cplusplus >= 201103L |
478 | namespace dr647 { // dr647: yes |
479 | // This is partially superseded by dr1358. |
480 | struct A { |
481 | constexpr virtual void f() const; |
482 | constexpr virtual void g() const {} // expected-error {{virtual function cannot be constexpr}} |
483 | }; |
484 | |
485 | struct X { virtual void f() const; }; // expected-note {{overridden}} |
486 | struct B : X { |
487 | constexpr void f() const {} // expected-error {{virtual function cannot be constexpr}} |
488 | }; |
489 | |
490 | struct NonLiteral { NonLiteral() {} }; // expected-note {{not an aggregate and has no constexpr constructors}} |
491 | |
492 | struct C { |
493 | constexpr C(NonLiteral); |
494 | constexpr C(NonLiteral, int) {} // expected-error {{not a literal type}} |
495 | constexpr C() try {} catch (...) {} |
496 | #if __cplusplus <= 201703L |
497 | // expected-error@-2 {{function try block in constexpr constructor is a C++2a extension}} |
498 | #endif |
499 | #if __cplusplus < 201402L |
500 | // expected-error@-5 {{use of this statement in a constexpr constructor is a C++14 extension}} |
501 | #endif |
502 | }; |
503 | |
504 | struct D { |
505 | operator int() const; |
506 | constexpr D(int) {} |
507 | D(float); // expected-note 2{{declared here}} |
508 | }; |
509 | constexpr int get(); |
510 | struct E { |
511 | int n; |
512 | D d; |
513 | |
514 | // FIXME: We should diagnose this, as the conversion function is not |
515 | // constexpr. However, that part of this issue is supreseded by dr1364 and |
516 | // others; no diagnostic is required for this any more. |
517 | constexpr E() |
518 | : n(D(0)), |
519 | d(0) {} |
520 | |
521 | constexpr E(int) // expected-error {{never produces a constant expression}} |
522 | : n(0), |
523 | d(0.0f) {} // expected-note {{non-constexpr constructor}} |
524 | constexpr E(float f) // expected-error {{never produces a constant expression}} |
525 | : n(get()), |
526 | d(D(0) + f) {} // expected-note {{non-constexpr constructor}} |
527 | }; |
528 | } |
529 | #endif |
530 | |
531 | #if __cplusplus >= 201103L |
532 | namespace dr648 { // dr648: yes |
533 | int f(); |
534 | constexpr int a = (true ? 1 : f()); |
535 | constexpr int b = false && f(); |
536 | constexpr int c = true || f(); |
537 | } |
538 | #endif |
539 | |
540 | #if __cplusplus >= 201103L |
541 | namespace dr649 { // dr649: yes |
542 | alignas(0x20000000) int n; // expected-error {{requested alignment}} |
543 | struct alignas(0x20000000) X {}; // expected-error {{requested alignment}} |
544 | struct Y { int n alignas(0x20000000); }; // expected-error {{requested alignment}} |
545 | struct alignas(256) Z {}; |
546 | // This part is superseded by dr2130 and eventually by aligned allocation support. |
547 | auto *p = new Z; |
548 | } |
549 | #endif |
550 | |
551 | // dr650 FIXME: add codegen test |
552 | |
553 | #if __cplusplus >= 201103L |
554 | namespace dr651 { // dr651: yes |
555 | struct X { |
556 | virtual X &f(); |
557 | }; |
558 | struct Y : X { |
559 | Y &f(); |
560 | }; |
561 | using T = decltype(((X&&)Y()).f()); |
562 | using T = X &; |
563 | } |
564 | #endif |
565 | |
566 | #if __cplusplus >= 201103L |
567 | namespace dr652 { // dr652: yes |
568 | constexpr int n = 1.2 * 3.4; |
569 | static_assert(n == 4, ""); |
570 | } |
571 | #endif |
572 | |
573 | // dr653 FIXME: add codegen test |
574 | |
575 | #if __cplusplus >= 201103L |
576 | namespace dr654 { // dr654: yes |
577 | void f() { |
578 | if (nullptr) {} // expected-warning {{implicit conversion of nullptr constant to 'bool'}} |
579 | bool b = nullptr; // expected-warning {{implicit conversion of nullptr constant to 'bool'}} |
580 | if (nullptr == 0) {} |
581 | if (nullptr != 0) {} |
582 | if (nullptr <= 0) {} // expected-error {{invalid operands}} |
583 | if (nullptr == 1) {} // expected-error {{invalid operands}} |
584 | if (!nullptr) {} // expected-warning {{implicit conversion of nullptr constant to 'bool'}} |
585 | decltype(nullptr) n = 0; |
586 | static_cast<int>(nullptr); // expected-error {{not allowed}} |
587 | (void)static_cast<decltype(nullptr)>(0); |
588 | static_cast<decltype(nullptr)>(1); // expected-error {{not allowed}} |
589 | void(true ? nullptr : 0); |
590 | void(true ? 0 : nullptr); |
591 | } |
592 | } |
593 | #endif |
594 | |
595 | namespace dr655 { // dr655: yes |
596 | struct A { A(int); }; // expected-note 2-3{{not viable}} |
597 | struct B : A { |
598 | A a; |
599 | B(); |
600 | B(int) : B() {} // expected-error 0-1 {{C++11}} |
601 | B(int*) : A() {} // expected-error {{no matching constructor}} |
602 | }; |
603 | } |
604 | |
605 | namespace dr656 { // dr656: yes |
606 | struct A { A(const A&) = delete; }; // expected-error 0-1 {{C++11}} |
607 | struct B : A {}; |
608 | struct X { operator B(); } x; |
609 | const A &r = x; |
610 | struct Y : private A { // expected-note 2{{here}} expected-note 2{{candidate}} |
611 | operator B() volatile; |
612 | }; |
613 | extern Y y; |
614 | extern volatile Y vy; |
615 | // Conversion not considered due to reference-related types. |
616 | const A &s = y; // expected-error {{private base class}} |
617 | const A &t = vy; // expected-error {{drops 'volatile'}} |
618 | |
619 | struct C { operator struct D(); } c; |
620 | struct D : C {}; |
621 | const D &d = c; // ok, D not reference-related to C |
622 | |
623 | template<typename T> void accept(T); // expected-note {{candidate}} |
624 | template<typename T> void accept(...) = delete; // expected-error 0-1 {{C++11}} expected-note {{candidate}} |
625 | void f() { |
626 | accept<const A&>(x); |
627 | accept<const A&>(y); // expected-error {{private base class}} |
628 | accept<const A&>(vy); // expected-error {{call to deleted}} expected-error {{no matching constructor}} |
629 | accept<const D&>(c); |
630 | } |
631 | } |
632 | |
633 | namespace dr657 { // dr657: partial |
634 | struct Abs { virtual void x() = 0; }; |
635 | struct Der : public Abs { virtual void x(); }; |
636 | |
637 | struct Cnvt { template<typename F> Cnvt(F); }; |
638 | |
639 | void foo(Cnvt a); |
640 | void foo(Abs &a); |
641 | void f(Abs *a) { foo(*a); } |
642 | |
643 | void bar(Abs &a); |
644 | template<typename T> void bar(T); |
645 | void g(Abs *a) { bar(*a); } |
646 | |
647 | // FIXME: The following examples demonstrate that we might be accepting the |
648 | // above cases for the wrong reason. |
649 | |
650 | // FIXME: We should reject this. |
651 | struct C { C(Abs) {} }; |
652 | // FIXME: We should reject this. |
653 | struct Q { operator Abs() { __builtin_unreachable(); } } q; |
654 | #if __cplusplus >= 201703L |
655 | // FIXME: We should *definitely* reject this. |
656 | C c = Q().operator Abs(); |
657 | #endif |
658 | |
659 | template<typename F> struct Cnvt2 { Cnvt2(F); typedef int type; }; |
660 | |
661 | // FIXME: We should reject this. |
662 | void baz(Abs &a); |
663 | template<typename T> typename Cnvt2<T>::type baz(T); |
664 | void h(Abs *a) { baz(*a); } |
665 | |
666 | // FIXME: We should reject this too. |
667 | Cnvt2<Abs>::type err; |
668 | } |
669 | |
670 | // dr658 FIXME: add codegen test |
671 | |
672 | #if __cplusplus >= 201103L |
673 | namespace dr659 { // dr659: yes |
674 | static_assert(alignof(char) == alignof(char&), ""); |
675 | static_assert(alignof(int) == alignof(int&), ""); |
676 | int n = alignof(int(&)()); // expected-error {{application of 'alignof' to a function type}} |
677 | struct A; // expected-note {{forward}} |
678 | int m = alignof(A&); // expected-error {{application of 'alignof' to an incomplete type}} |
679 | } |
680 | #endif |
681 | |
682 | #if __cplusplus >= 201103L |
683 | namespace dr660 { // dr660: yes |
684 | enum : int { a }; |
685 | enum class { b }; // expected-error {{requires a name}} |
686 | auto x = a; |
687 | |
688 | struct X { |
689 | enum : int { a }; |
690 | enum class { b }; // expected-error {{requires a name}} |
691 | }; |
692 | auto y = X::a; |
693 | } |
694 | #endif |
695 | |
696 | // dr661 FIXME: add codegen test |
697 | |
698 | namespace dr662 { // dr662: yes |
699 | template <typename T> void f(T t) { |
700 | T &tr = t; |
701 | T *tp = &t; // expected-error {{pointer to a reference}} |
702 | #if __cplusplus >= 201103L |
703 | auto *ap = &t; |
704 | #endif |
705 | } |
706 | void g(int n) { f<int&>(n); } // expected-note {{instantiation of}} |
707 | } |
708 | |
709 | namespace dr663 { // dr663: yes c++11 |
710 | int ЍЎ = 123; |
711 | #if __cplusplus < 201103L |
712 | // expected-error@-2 {{non-ASCII}} |
713 | #endif |
714 | } |
715 | |
716 | #if __cplusplus >= 201103L |
717 | namespace dr664 { // dr664: yes |
718 | struct A { A(const A&) = delete; }; |
719 | A &&f(A &&a, int n) { |
720 | if (n) |
721 | return f(static_cast<A&&>(a), n - 1); |
722 | return static_cast<A&&>(a); |
723 | } |
724 | } |
725 | #endif |
726 | |
727 | namespace dr665 { // dr665: yes |
728 | struct A { virtual ~A(); }; |
729 | struct B : A {} *b; |
730 | struct C : private A {} *c; // expected-note {{here}} |
731 | struct D : B, C {} *d; |
732 | |
733 | struct VB : virtual A {} *vb; |
734 | struct VC : private virtual A {} *vc; // expected-note {{here}} |
735 | struct VD : VB, VC {} *vd; |
736 | |
737 | void f() { |
738 | (void)dynamic_cast<A*>(b); |
739 | (void)dynamic_cast<A*>(c); // expected-error {{private}} |
740 | (void)dynamic_cast<A*>(d); // expected-error {{ambiguous}} |
741 | (void)dynamic_cast<A*>(vb); |
742 | (void)dynamic_cast<A*>(vc); // expected-error {{private}}, even though it could be valid at runtime |
743 | (void)dynamic_cast<A*>(vd); |
744 | } |
745 | } |
746 | |
747 | namespace dr666 { // dr666: yes |
748 | struct P { friend P operator*(P, P); P(int); } p(0); |
749 | |
750 | template<int> int f(); |
751 | template<typename T> int f() { |
752 | T::type *p = 0; // expected-error {{missing 'typename'}} |
753 | int a(T::type); // expected-error {{missing 'typename'}} |
754 | return f<T::type>(); // expected-error {{missing 'typename'}} |
755 | } |
756 | struct X { static const int type = 0; }; |
757 | struct Y { typedef int type; }; |
758 | int a = f<X>(); |
759 | int b = f<Y>(); // expected-note {{instantiation of}} |
760 | } |
761 | |
762 | // Triviality is entirely different in C++98. |
763 | #if __cplusplus >= 201103L |
764 | namespace dr667 { // dr667: yes |
765 | struct A { |
766 | A() = default; // expected-warning {{explicitly defaulted default constructor is implicitly deleted}} |
767 | int &r; // expected-note {{because field 'r' of reference type 'int &' would not be initialized}} |
768 | }; |
769 | static_assert(!__is_trivially_constructible(A), ""); |
770 | |
771 | struct B { ~B() = delete; }; |
772 | union C { B b; }; |
773 | static_assert(!__is_trivially_destructible(C), ""); |
774 | |
775 | struct D { D(const D&) = delete; }; |
776 | struct E : D {}; |
777 | static_assert(!__is_trivially_constructible(E, const E&), ""); |
778 | |
779 | struct F { F &operator=(F&&) = delete; }; |
780 | struct G : F {}; |
781 | static_assert(!__is_trivially_assignable(G, G&&), ""); |
782 | } |
783 | #endif |
784 | |
785 | // dr668 FIXME: add codegen test |
786 | |
787 | #if __cplusplus >= 201103L |
788 | namespace dr669 { // dr669: yes |
789 | void f() { |
790 | int n; |
791 | using T = decltype(n); |
792 | using T = int; |
793 | using U = decltype((n)); |
794 | using U = int &; |
795 | |
796 | [=] { |
797 | using V = decltype(n); |
798 | using V = int; |
799 | using W = decltype((n)); |
800 | using W = const int&; |
801 | } (); |
802 | |
803 | struct X { |
804 | int n; |
805 | void f() const { |
806 | using X = decltype(n); |
807 | using X = int; |
808 | using Y = decltype((n)); |
809 | using Y = const int&; |
810 | } |
811 | }; |
812 | } |
813 | } |
814 | #endif |
815 | |
816 | namespace dr671 { // dr671: yes |
817 | enum class E { e }; // expected-error 0-1 {{C++11}} |
818 | E e = static_cast<E>(0); |
819 | int n = static_cast<int>(E::e); // expected-error 0-1 {{C++11}} |
820 | int m = static_cast<int>(e); // expected-error 0-1 {{C++11}} |
821 | } |
822 | |
823 | // dr672 FIXME: add codegen test |
824 | |
825 | namespace dr673 { // dr673: yes |
826 | template<typename> struct X { static const int n = 0; }; |
827 | |
828 | class A { |
829 | friend class B *f(); |
830 | class C *f(); |
831 | void f(class D *); |
832 | enum { e = X<struct E>::n }; |
833 | void g() { extern struct F *p; } |
834 | }; |
835 | B *b; |
836 | C *c; |
837 | D *d; |
838 | E *e; |
839 | F *f; // expected-error {{unknown type name}} |
840 | } |
841 | |
842 | namespace dr674 { // dr674: 8 |
843 | template<typename T> int f(T); |
844 | |
845 | int g(int); |
846 | template<typename T> int g(T); |
847 | |
848 | int h(int); |
849 | template<typename T> int h(T); |
850 | |
851 | class X { |
852 | friend int dr674::f(int); |
853 | friend int dr674::g(int); |
854 | friend int dr674::h<>(int); |
855 | int n; // expected-note 2{{private}} |
856 | }; |
857 | |
858 | template<typename T> int f(T) { return X().n; } |
859 | int g(int) { return X().n; } |
860 | template<typename T> int g(T) { return X().n; } // expected-error {{private}} |
861 | int h(int) { return X().n; } // expected-error {{private}} |
862 | template<typename T> int h(T) { return X().n; } |
863 | |
864 | template int f(int); |
865 | template int g(int); // expected-note {{in instantiation of}} |
866 | template int h(int); |
867 | |
868 | |
869 | struct Y { |
870 | template<typename T> int f(T); |
871 | |
872 | int g(int); |
873 | template<typename T> int g(T); |
874 | |
875 | int h(int); |
876 | template<typename T> int h(T); |
877 | }; |
878 | |
879 | class Z { |
880 | friend int Y::f(int); |
881 | friend int Y::g(int); |
882 | friend int Y::h<>(int); |
883 | int n; // expected-note 2{{private}} |
884 | }; |
885 | |
886 | template<typename T> int Y::f(T) { return Z().n; } |
887 | int Y::g(int) { return Z().n; } |
888 | template<typename T> int Y::g(T) { return Z().n; } // expected-error {{private}} |
889 | int Y::h(int) { return Z().n; } // expected-error {{private}} |
890 | template<typename T> int Y::h(T) { return Z().n; } |
891 | |
892 | // FIXME: Should the <> be required here? |
893 | template int Y::f<>(int); |
894 | template int Y::g<>(int); // expected-note {{in instantiation of}} |
895 | template int Y::h<>(int); |
896 | } |
897 | |
898 | namespace dr675 { // dr675: dup 739 |
899 | template<typename T> struct A { T n : 1; }; |
900 | #if __cplusplus >= 201103L |
901 | static_assert(A<char>{1}.n < 0, ""); |
902 | static_assert(A<int>{1}.n < 0, ""); |
903 | static_assert(A<long long>{1}.n < 0, ""); |
904 | #endif |
905 | } |
906 | |
907 | // dr676: na |
908 | |
909 | namespace dr677 { // dr677: no |
910 | struct A { |
911 | void *operator new(std::size_t); |
912 | void operator delete(void*) = delete; // expected-error 0-1{{C++11}} expected-note {{deleted}} |
913 | }; |
914 | struct B { |
915 | void *operator new(std::size_t); |
916 | void operator delete(void*) = delete; // expected-error 0-1{{C++11}} expected-note 2{{deleted}} |
917 | virtual ~B(); |
918 | }; |
919 | void f(A *p) { delete p; } // expected-error {{deleted}} |
920 | // FIXME: This appears to be valid; we shouldn't even be looking up the 'operator delete' here. |
921 | void f(B *p) { delete p; } // expected-error {{deleted}} |
922 | B::~B() {} // expected-error {{deleted}} |
923 | } |
924 | |
925 | // dr678 FIXME: check that the modules ODR check catches this |
926 | |
927 | namespace dr679 { // dr679: yes |
928 | struct X {}; |
929 | template<int> void operator+(X, X); |
930 | template<> void operator+<0>(X, X) {} // expected-note {{previous}} |
931 | template<> void operator+<0>(X, X) {} // expected-error {{redefinition}} |
932 | } |
933 | |
934 | // dr680: na |
935 | |
936 | #if __cplusplus >= 201103L |
937 | namespace dr681 { // dr681: partial |
938 | auto *a() -> int; // expected-error {{must specify return type 'auto', not 'auto *'}} |
939 | auto (*b)() -> int; |
940 | // FIXME: The errors here aren't great. |
941 | auto (*c()) -> int; // expected-error {{expected function body}} |
942 | auto ((*d)()) -> int; // expected-error {{expected ';'}} expected-error {{requires an initializer}} |
943 | |
944 | // FIXME: This is definitely wrong. This should be |
945 | // "function of () returning pointer to function of () returning int" |
946 | // not a function with a deduced return type. |
947 | auto (*e())() -> int; // expected-error 0-1{{C++14}} |
948 | |
949 | auto f() -> int (*)(); |
950 | auto g() -> auto (*)() -> int; |
951 | } |
952 | #endif |
953 | |
954 | #if __cplusplus >= 201103L |
955 | namespace dr683 { // dr683: yes |
956 | struct A { |
957 | A() = default; |
958 | A(const A&) = default; |
959 | A(A&); |
960 | }; |
961 | static_assert(__is_trivially_constructible(A, const A&), ""); |
962 | static_assert(!__is_trivially_constructible(A, A&), ""); |
963 | static_assert(!__is_trivial(A), ""); |
964 | |
965 | struct B : A {}; |
966 | static_assert(__is_trivially_constructible(B, const B&), ""); |
967 | static_assert(__is_trivially_constructible(B, B&), ""); |
968 | static_assert(__is_trivial(B), ""); |
969 | } |
970 | #endif |
971 | |
972 | #if __cplusplus >= 201103L |
973 | namespace dr684 { // dr684: sup 1454 |
974 | void f() { |
975 | int a; // expected-note {{here}} |
976 | constexpr int *p = &a; // expected-error {{constant expression}} expected-note {{pointer to 'a'}} |
977 | } |
978 | } |
979 | #endif |
980 | |
981 | #if __cplusplus >= 201103L |
982 | namespace dr685 { // dr685: yes |
983 | enum E : long { e }; |
984 | void f(int); |
985 | int f(long); |
986 | int a = f(e); |
987 | |
988 | enum G : short { g }; |
989 | int h(short); |
990 | void h(long); |
991 | int b = h(g); |
992 | |
993 | int i(int); |
994 | void i(long); |
995 | int c = i(g); |
996 | |
997 | int j(unsigned int); // expected-note {{candidate}} |
998 | void j(long); // expected-note {{candidate}} |
999 | int d = j(g); // expected-error {{ambiguous}} |
1000 | |
1001 | int k(short); // expected-note {{candidate}} |
1002 | void k(int); // expected-note {{candidate}} |
1003 | int x = k(g); // expected-error {{ambiguous}} |
1004 | } |
1005 | #endif |
1006 | |
1007 | namespace dr686 { // dr686: yes |
1008 | void f() { |
1009 | (void)dynamic_cast<struct A*>(0); // expected-error {{incomplete}} expected-note {{forward}} |
1010 | (void)dynamic_cast<struct A{}*>(0); // expected-error {{cannot be defined in a type specifier}} |
1011 | (void)typeid(struct B*); |
1012 | (void)typeid(struct B{}*); // expected-error {{cannot be defined in a type specifier}} |
1013 | (void)static_cast<struct C*>(0); |
1014 | (void)static_cast<struct C{}*>(0); // expected-error {{cannot be defined in a type specifier}} |
1015 | (void)reinterpret_cast<struct D*>(0); |
1016 | (void)reinterpret_cast<struct D{}*>(0); // expected-error {{cannot be defined in a type specifier}} |
1017 | (void)const_cast<struct E*>(0); // expected-error {{not allowed}} |
1018 | (void)const_cast<struct E{}*>(0); // expected-error {{cannot be defined in a type specifier}} |
1019 | (void)sizeof(struct F*); |
1020 | (void)sizeof(struct F{}*); // expected-error {{cannot be defined in a type specifier}} |
1021 | (void)new struct G*; |
1022 | (void)new struct G{}*; // expected-error {{cannot be defined in a type specifier}} |
1023 | #if __cplusplus >= 201103L |
1024 | (void)alignof(struct H*); |
1025 | (void)alignof(struct H{}*); // expected-error {{cannot be defined in a type specifier}} |
1026 | #endif |
1027 | (void)(struct I*)0; |
1028 | (void)(struct I{}*)0; // expected-error {{cannot be defined in a type specifier}} |
1029 | if (struct J *p = 0) {} |
1030 | if (struct J {} *p = 0) {} // expected-error {{cannot be defined in a condition}} |
1031 | for (struct K *p = 0; struct L *q = 0; ) {} |
1032 | for (struct K {} *p = 0; struct L {} *q = 0; ) {} // expected-error {{'L' cannot be defined in a condition}} |
1033 | #if __cplusplus >= 201103L |
1034 | using M = struct {}; |
1035 | #endif |
1036 | struct N { |
1037 | operator struct O{}(){}; // expected-error {{cannot be defined in a type specifier}} |
1038 | }; |
1039 | try {} |
1040 | catch (struct P *) {} // expected-error {{incomplete}} expected-note {{forward}} |
1041 | catch (struct P {} *) {} // expected-error {{cannot be defined in a type specifier}} |
1042 | #if __cplusplus < 201703L |
1043 | void g() throw(struct Q); // expected-error {{incomplete}} expected-note {{forward}} |
1044 | void h() throw(struct Q {}); // expected-error {{cannot be defined in a type specifier}} |
1045 | #endif |
1046 | } |
1047 | template<struct R *> struct X; |
1048 | template<struct R {} *> struct Y; // expected-error {{cannot be defined in a type specifier}} |
1049 | } |
1050 | |
1051 | namespace dr687 { // dr687 still open |
1052 | template<typename T> void f(T a) { |
1053 | // FIXME: This is valid in C++20. |
1054 | g<int>(a); // expected-error {{undeclared}} expected-error {{'('}} |
1055 | |
1056 | // This is not. |
1057 | template g<int>(a); // expected-error {{expected expression}} |
1058 | } |
1059 | } |
1060 | |
1061 | namespace dr692 { // dr692: no |
1062 | namespace temp_func_order_example2 { |
1063 | template <typename T, typename U> struct A {}; |
1064 | template <typename T, typename U> void f(U, A<U, T> *p = 0); // expected-note {{candidate}} |
1065 | template <typename U> int &f(U, A<U, U> *p = 0); // expected-note {{candidate}} |
1066 | template <typename T> void g(T, T = T()); |
1067 | template <typename T, typename... U> void g(T, U...); // expected-error 0-1{{C++11}} |
1068 | void h() { |
1069 | int &r = f<int>(42, (A<int, int> *)0); |
1070 | f<int>(42); // expected-error {{ambiguous}} |
1071 | // FIXME: We should reject this due to ambiguity between the pack and the |
1072 | // default argument. Only parameters with arguments are considered during |
1073 | // partial ordering of function templates. |
1074 | g(42); |
1075 | } |
1076 | } |
1077 | |
1078 | namespace temp_func_order_example3 { |
1079 | template <typename T, typename... U> void f(T, U...); // expected-error 0-1{{C++11}} |
1080 | template <typename T> void f(T); |
1081 | template <typename T, typename... U> int &g(T *, U...); // expected-error 0-1{{C++11}} |
1082 | template <typename T> void g(T); |
1083 | void h(int i) { |
1084 | // This is made ambiguous by dr692, but made valid again by dr1395. |
1085 | f(&i); |
1086 | int &r = g(&i); |
1087 | } |
1088 | } |
1089 | |
1090 | namespace temp_deduct_partial_example { |
1091 | template <typename... Args> char &f(Args... args); // expected-error 0-1{{C++11}} |
1092 | template <typename T1, typename... Args> short &f(T1 a1, Args... args); // expected-error 0-1{{C++11}} |
1093 | template <typename T1, typename T2> int &f(T1 a1, T2 a2); |
1094 | void g() { |
1095 | char &a = f(); |
1096 | short &b = f(1, 2, 3); |
1097 | int &c = f(1, 2); |
1098 | } |
1099 | } |
1100 | |
1101 | namespace temp_deduct_type_example1 { |
1102 | template <class T1, class ...Z> class S; // expected-error 0-1{{C++11}} |
1103 | template <class T1, class ...Z> class S<T1, const Z&...>; // expected-error 0-1{{C++11}} |
1104 | template <class T1, class T2> class S<T1, const T2&> {}; |
1105 | S<int, const int&> s; |
1106 | |
1107 | // FIXME: This should select the first partial specialization. Deduction of |
1108 | // the second from the first should succeed, because we should ignore the |
1109 | // trailing pack in A with no corresponding P. |
1110 | template<class T, class... U> struct A; // expected-error 0-1{{C++11}} |
1111 | template<class T1, class T2, class... U> struct A<T1,T2*,U...>; // expected-note {{matches}} expected-error 0-1{{C++11}} |
1112 | template<class T1, class T2> struct A<T1,T2> {}; // expected-note {{matches}} |
1113 | template struct A<int, int*>; // expected-error {{ambiguous}} |
1114 | } |
1115 | |
1116 | namespace temp_deduct_type_example3 { |
1117 | // FIXME: This should select the first template, as in the case above. |
1118 | template<class T, class... U> void f(T*, U...){} // expected-note {{candidate}} expected-error 0-1{{C++11}} |
1119 | template<class T> void f(T){} // expected-note {{candidate}} |
1120 | template void f(int*); // expected-error {{ambiguous}} |
1121 | } |
1122 | } |
1123 | |