| 1 | // RUN: %clang_cc1 %s -fdelayed-template-parsing -fcxx-exceptions -fsyntax-only -Wexceptions -verify -fdeclspec -std=c++17 |
| 2 | struct A_ShouldDiag { |
| 3 | ~A_ShouldDiag(); // implicitly noexcept(true) |
| 4 | }; |
| 5 | A_ShouldDiag::~A_ShouldDiag() { // expected-note {{destructor has a implicit non-throwing exception specification}} |
| 6 | throw 1; // expected-warning {{has a non-throwing exception specification but can still throw}} |
| 7 | } |
| 8 | struct B_ShouldDiag { |
| 9 | int i; |
| 10 | ~B_ShouldDiag() noexcept(true) {} //no disg, no throw stmt |
| 11 | }; |
| 12 | struct R_ShouldDiag : A_ShouldDiag { |
| 13 | B_ShouldDiag b; |
| 14 | ~R_ShouldDiag() { // expected-note {{destructor has a implicit non-throwing exception specification}} |
| 15 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 16 | } |
| 17 | __attribute__((nothrow)) R_ShouldDiag() {// expected-note {{function declared non-throwing here}} |
| 18 | throw 1;// expected-warning {{has a non-throwing exception specification but}} |
| 19 | } |
| 20 | void __attribute__((nothrow)) SomeThrow() {// expected-note {{function declared non-throwing here}} |
| 21 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 22 | } |
| 23 | void __declspec(nothrow) SomeDeclspecThrow() {// expected-note {{function declared non-throwing here}} |
| 24 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 25 | } |
| 26 | }; |
| 27 | |
| 28 | struct M_ShouldNotDiag { |
| 29 | B_ShouldDiag b; |
| 30 | ~M_ShouldNotDiag() noexcept(false); |
| 31 | }; |
| 32 | |
| 33 | M_ShouldNotDiag::~M_ShouldNotDiag() noexcept(false) { |
| 34 | throw 1; |
| 35 | } |
| 36 | |
| 37 | struct N_ShouldDiag { |
| 38 | B_ShouldDiag b; |
| 39 | ~N_ShouldDiag(); //implicitly noexcept(true) |
| 40 | }; |
| 41 | |
| 42 | N_ShouldDiag::~N_ShouldDiag() { // expected-note {{destructor has a implicit non-throwing exception specification}} |
| 43 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 44 | } |
| 45 | struct X_ShouldDiag { |
| 46 | B_ShouldDiag b; |
| 47 | ~X_ShouldDiag() noexcept { // expected-note {{destructor has a non-throwing exception}} |
| 48 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 49 | } |
| 50 | }; |
| 51 | struct Y_ShouldDiag : A_ShouldDiag { |
| 52 | ~Y_ShouldDiag() noexcept(true) { // expected-note {{destructor has a non-throwing exception specification}} |
| 53 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 54 | } |
| 55 | }; |
| 56 | struct C_ShouldNotDiag { |
| 57 | int i; |
| 58 | ~C_ShouldNotDiag() noexcept(false) {} |
| 59 | }; |
| 60 | struct D_ShouldNotDiag { |
| 61 | C_ShouldNotDiag c; |
| 62 | ~D_ShouldNotDiag() { //implicitly noexcept(false) |
| 63 | throw 1; |
| 64 | } |
| 65 | }; |
| 66 | struct E_ShouldNotDiag { |
| 67 | C_ShouldNotDiag c; |
| 68 | ~E_ShouldNotDiag(); //implicitly noexcept(false) |
| 69 | }; |
| 70 | E_ShouldNotDiag::~E_ShouldNotDiag() //implicitly noexcept(false) |
| 71 | { |
| 72 | throw 1; |
| 73 | } |
| 74 | |
| 75 | template <typename T> |
| 76 | class A1_ShouldDiag { |
| 77 | T b; |
| 78 | |
| 79 | public: |
| 80 | ~A1_ShouldDiag() { // expected-note {{destructor has a implicit non-throwing exception specification}} |
| 81 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 82 | } |
| 83 | }; |
| 84 | template <typename T> |
| 85 | struct B1_ShouldDiag { |
| 86 | T i; |
| 87 | ~B1_ShouldDiag() noexcept(true) {} |
| 88 | }; |
| 89 | template <typename T> |
| 90 | struct R1_ShouldDiag : A1_ShouldDiag<T> //expected-note {{in instantiation of member function}} |
| 91 | { |
| 92 | B1_ShouldDiag<T> b; |
| 93 | ~R1_ShouldDiag() { // expected-note {{destructor has a implicit non-throwing exception specification}} |
| 94 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 95 | } |
| 96 | }; |
| 97 | template <typename T> |
| 98 | struct S1_ShouldDiag : A1_ShouldDiag<T> { |
| 99 | B1_ShouldDiag<T> b; |
| 100 | ~S1_ShouldDiag() noexcept { // expected-note {{destructor has a non-throwing exception specification}} |
| 101 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 102 | } |
| 103 | }; |
| 104 | void operator delete(void *ptr) noexcept { // expected-note {{deallocator has a non-throwing exception specification}} |
| 105 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 106 | } |
| 107 | struct except_fun { |
| 108 | static const bool i = false; |
| 109 | }; |
| 110 | struct noexcept_fun { |
| 111 | static const bool i = true; |
| 112 | }; |
| 113 | template <typename T> |
| 114 | struct dependent_warn { |
| 115 | ~dependent_warn() noexcept(T::i) { |
| 116 | throw 1; |
| 117 | } |
| 118 | }; |
| 119 | template <typename T> |
| 120 | struct dependent_warn_noexcept { |
| 121 | ~dependent_warn_noexcept() noexcept(T::i) { // expected-note {{destructor has a non-throwing exception specification}} |
| 122 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 123 | } |
| 124 | }; |
| 125 | template <typename T> |
| 126 | struct dependent_warn_both { |
| 127 | ~dependent_warn_both() noexcept(T::i) { // expected-note {{destructor has a non-throwing exception specification}} |
| 128 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 129 | } |
| 130 | }; |
| 131 | void foo() noexcept { //expected-note {{function declared non-throwing here}} |
| 132 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 133 | } |
| 134 | struct Throws { |
| 135 | ~Throws() noexcept(false); |
| 136 | }; |
| 137 | |
| 138 | struct ShouldDiagnose { |
| 139 | Throws T; |
| 140 | ~ShouldDiagnose() noexcept { //expected-note {{destructor has a non-throwing exception specification}} |
| 141 | throw; // expected-warning {{has a non-throwing exception specification but}} |
| 142 | } |
| 143 | }; |
| 144 | struct ShouldNotDiagnose { |
| 145 | Throws T; |
| 146 | ~ShouldNotDiagnose() { |
| 147 | throw; |
| 148 | } |
| 149 | }; |
| 150 | |
| 151 | void bar_ShouldNotDiag() noexcept { |
| 152 | try { |
| 153 | throw 1; |
| 154 | } catch (...) { |
| 155 | } |
| 156 | } |
| 157 | void f_ShouldNotDiag() noexcept { |
| 158 | try { |
| 159 | throw 12; |
| 160 | } catch (int) { |
| 161 | } |
| 162 | } |
| 163 | void g_ShouldNotDiag() noexcept { |
| 164 | try { |
| 165 | throw 12; |
| 166 | } catch (...) { |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | void h_ShouldDiag() noexcept { //expected-note {{function declared non-throwing here}} |
| 171 | try { |
| 172 | throw 12; // expected-warning {{has a non-throwing exception specification but}} |
| 173 | } catch (const char *) { |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | void i_ShouldDiag() noexcept { //expected-note {{function declared non-throwing here}} |
| 178 | try { |
| 179 | throw 12; |
| 180 | } catch (int) { |
| 181 | throw; // expected-warning {{has a non-throwing exception specification but}} |
| 182 | } |
| 183 | } |
| 184 | void j_ShouldDiag() noexcept { //expected-note {{function declared non-throwing here}} |
| 185 | try { |
| 186 | throw 12; |
| 187 | } catch (int) { |
| 188 | throw "haha"; // expected-warning {{has a non-throwing exception specification but}} |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | void k_ShouldDiag() noexcept { //expected-note {{function declared non-throwing here}} |
| 193 | try { |
| 194 | throw 12; |
| 195 | } catch (...) { |
| 196 | throw; // expected-warning {{has a non-throwing exception specification but}} |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | void loo_ShouldDiag(int i) noexcept { //expected-note {{function declared non-throwing here}} |
| 201 | if (i) |
| 202 | try { |
| 203 | throw 12; |
| 204 | } catch (int) { |
| 205 | throw "haha"; //expected-warning {{has a non-throwing exception specification but}} |
| 206 | } |
| 207 | i = 10; |
| 208 | } |
| 209 | |
| 210 | void loo1_ShouldNotDiag() noexcept { |
| 211 | if (0) |
| 212 | throw 12; |
| 213 | } |
| 214 | |
| 215 | void loo2_ShouldDiag() noexcept { //expected-note {{function declared non-throwing here}} |
| 216 | if (1) |
| 217 | throw 12; // expected-warning {{has a non-throwing exception specification but}} |
| 218 | } |
| 219 | struct S {}; |
| 220 | |
| 221 | void l_ShouldDiag() noexcept { //expected-note {{function declared non-throwing here}} |
| 222 | try { |
| 223 | throw S{}; //expected-warning {{has a non-throwing exception specification but}} |
| 224 | } catch (S *s) { |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | void m_ShouldNotDiag() noexcept { |
| 229 | try { |
| 230 | const S &s = S{}; |
| 231 | throw s; |
| 232 | } catch (S s) { |
| 233 | } |
| 234 | } |
| 235 | void n_ShouldNotDiag() noexcept { |
| 236 | try { |
| 237 | S s = S{}; |
| 238 | throw s; |
| 239 | } catch (const S &s) { |
| 240 | } |
| 241 | } |
| 242 | // As seen in p34973, this should not throw the warning. If there is an active |
| 243 | // exception, catch(...) catches everything. |
| 244 | void o_ShouldNotDiag() noexcept { |
| 245 | try { |
| 246 | throw; |
| 247 | } catch (...) { |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | void p_ShouldNotDiag() noexcept { |
| 252 | // Don't warn here: it's possible that the user arranges to only call this |
| 253 | // when the active exception is of type 'int'. |
| 254 | try { |
| 255 | throw; |
| 256 | } catch (int){ |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | void q_ShouldNotDiag() noexcept { |
| 261 | try { |
| 262 | throw; |
| 263 | } catch (int){ |
| 264 | } catch (...){ |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | #define NOEXCEPT noexcept |
| 269 | void with_macro() NOEXCEPT { //expected-note {{function declared non-throwing here}} |
| 270 | throw 1; // expected-warning {{has a non-throwing exception specification but}} |
| 271 | } |
| 272 | |
| 273 | void with_try_block() try { |
| 274 | throw 2; |
| 275 | } catch (...) { |
| 276 | } |
| 277 | |
| 278 | void with_try_block1() noexcept try { //expected-note {{function declared non-throwing here}} |
| 279 | throw 2; // expected-warning {{has a non-throwing exception specification but}} |
| 280 | } catch (char *) { |
| 281 | } |
| 282 | |
| 283 | namespace derived { |
| 284 | struct B {}; |
| 285 | struct D: B {}; |
| 286 | void goodPlain() noexcept { |
| 287 | try { |
| 288 | throw D(); |
| 289 | } catch (B) {} |
| 290 | } |
| 291 | void goodReference() noexcept { |
| 292 | try { |
| 293 | throw D(); |
| 294 | } catch (B &) {} |
| 295 | } |
| 296 | void goodPointer() noexcept { |
| 297 | D d; |
| 298 | try { |
| 299 | throw &d; |
| 300 | } catch (B *) {} |
| 301 | } |
| 302 | void badPlain() noexcept { //expected-note {{function declared non-throwing here}} |
| 303 | try { |
| 304 | throw B(); // expected-warning {{'badPlain' has a non-throwing exception specification but can still throw}} |
| 305 | } catch (D) {} |
| 306 | } |
| 307 | void badReference() noexcept { //expected-note {{function declared non-throwing here}} |
| 308 | try { |
| 309 | throw B(); // expected-warning {{'badReference' has a non-throwing exception specification but can still throw}} |
| 310 | } catch (D &) {} |
| 311 | } |
| 312 | void badPointer() noexcept { //expected-note {{function declared non-throwing here}} |
| 313 | B b; |
| 314 | try { |
| 315 | throw &b; // expected-warning {{'badPointer' has a non-throwing exception specification but can still throw}} |
| 316 | } catch (D *) {} |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | int main() { |
| 321 | R1_ShouldDiag<int> o; //expected-note {{in instantiation of member function}} |
| 322 | S1_ShouldDiag<int> b; //expected-note {{in instantiation of member function}} |
| 323 | dependent_warn<except_fun> f; |
| 324 | dependent_warn_noexcept<noexcept_fun> f1; //expected-note {{in instantiation of member function}} |
| 325 | dependent_warn_both<except_fun> f2; |
| 326 | dependent_warn_both<noexcept_fun> f3; //expected-note {{in instantiation of member function}} |
| 327 | ShouldDiagnose obj; |
| 328 | ShouldNotDiagnose obj1; |
| 329 | } |
| 330 | |
| 331 | namespace ExceptionInNamespace { |
| 332 | namespace N { |
| 333 | struct E {}; |
| 334 | } |
| 335 | void run() throw() { |
| 336 | try { |
| 337 | throw N::E(); |
| 338 | } catch (const N::E &e) { |
| 339 | } |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | namespace HandlerSpecialCases { |
| 344 | struct A {}; |
| 345 | using CA = const A; |
| 346 | |
| 347 | struct B : A {}; |
| 348 | using CB = const B; |
| 349 | |
| 350 | struct AmbigBase {}; |
| 351 | struct AmbigMiddle : AmbigBase {}; |
| 352 | struct AmbigDerived : AmbigBase, AmbigMiddle {}; // expected-warning {{inaccessible}} |
| 353 | |
| 354 | struct PrivateBase {}; |
| 355 | struct PrivateDerived : private PrivateBase { friend void bad3() throw(); }; |
| 356 | |
| 357 | void good() throw() { |
| 358 | try { throw CA(); } catch (volatile A&) {} |
| 359 | try { throw B(); } catch (A&) {} |
| 360 | try { throw B(); } catch (const volatile A&) {} |
| 361 | try { throw CB(); } catch (A&) {} |
| 362 | try { throw (int*)0; } catch (void* const volatile) {} |
| 363 | try { throw (int*)0; } catch (void* const &) {} |
| 364 | try { throw (B*)0; } catch (A*) {} |
| 365 | try { throw (B*)0; } catch (A* const &) {} |
| 366 | try { throw (void(*)() noexcept)0; } catch (void (*)()) {} |
| 367 | try { throw (void(*)() noexcept)0; } catch (void (*const &)()) {} |
| 368 | try { throw (int**)0; } catch (const int * const*) {} |
| 369 | try { throw (int**)0; } catch (const int * const* const&) {} |
| 370 | try { throw nullptr; } catch (int*) {} |
| 371 | try { throw nullptr; } catch (int* const&) {} |
| 372 | } |
| 373 | |
| 374 | void bad1() throw() { // expected-note {{here}} |
| 375 | try { throw A(); } catch (const B&) {} // expected-warning {{still throw}} |
| 376 | } |
| 377 | void bad2() throw() { // expected-note {{here}} |
| 378 | try { throw AmbigDerived(); } catch (const AmbigBase&) {} // expected-warning {{still throw}} |
| 379 | } |
| 380 | void bad3() throw() { // expected-note {{here}} |
| 381 | try { throw PrivateDerived(); } catch (const PrivateBase&) {} // expected-warning {{still throw}} |
| 382 | } |
| 383 | void bad4() throw() { // expected-note {{here}} |
| 384 | try { throw (int*)0; } catch (void* &) {} // expected-warning {{still throw}} |
| 385 | } |
| 386 | void bad5() throw() { // expected-note {{here}} |
| 387 | try { throw (int*)0; } catch (void* const volatile &) {} // expected-warning {{still throw}} |
| 388 | } |
| 389 | void bad6() throw() { // expected-note {{here}} |
| 390 | try { throw (int* volatile)0; } catch (void* const volatile &) {} // expected-warning {{still throw}} |
| 391 | } |
| 392 | void bad7() throw() { // expected-note {{here}} |
| 393 | try { throw (AmbigDerived*)0; } catch (AmbigBase*) {} // expected-warning {{still throw}} |
| 394 | } |
| 395 | void bad8() throw() { // expected-note {{here}} |
| 396 | try { throw (PrivateDerived*)0; } catch (PrivateBase*) {} // expected-warning {{still throw}} |
| 397 | } |
| 398 | void bad9() throw() { // expected-note {{here}} |
| 399 | try { throw (B*)0; } catch (A* &) {} // expected-warning {{still throw}} |
| 400 | } |
| 401 | void bad10() throw() { // expected-note {{here}} |
| 402 | try { throw (void(*)())0; } catch (void (*)() noexcept) {} // expected-warning {{still throw}} |
| 403 | } |
| 404 | void bad11() throw() { // expected-note {{here}} |
| 405 | try { throw (int**)0; } catch (const int **) {} // expected-warning {{still throw}} |
| 406 | } |
| 407 | void bad12() throw() { // expected-note {{here}} |
| 408 | try { throw nullptr; } catch (int) {} // expected-warning {{still throw}} |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | namespace NestedTry { |
| 413 | void f() noexcept { |
| 414 | try { |
| 415 | try { |
| 416 | throw 0; |
| 417 | } catch (float) {} |
| 418 | } catch (int) {} |
| 419 | } |
| 420 | |
| 421 | struct A { [[noreturn]] ~A(); }; |
| 422 | |
| 423 | void g() noexcept { // expected-note {{here}} |
| 424 | try { |
| 425 | try { |
| 426 | throw 0; // expected-warning {{still throw}} |
| 427 | } catch (float) {} |
| 428 | } catch (const char*) {} |
| 429 | } |
| 430 | |
| 431 | void h() noexcept { // expected-note {{here}} |
| 432 | try { |
| 433 | try { |
| 434 | throw 0; |
| 435 | } catch (float) {} |
| 436 | } catch (int) { |
| 437 | throw; // expected-warning {{still throw}} |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | // FIXME: Ideally, this should still warn; we can track which types are |
| 442 | // potentially thrown by the rethrow. |
| 443 | void i() noexcept { |
| 444 | try { |
| 445 | try { |
| 446 | throw 0; |
| 447 | } catch (int) { |
| 448 | throw; |
| 449 | } |
| 450 | } catch (float) {} |
| 451 | } |
| 452 | |
| 453 | // FIXME: Ideally, this should not warn: the second catch block is |
| 454 | // unreachable. |
| 455 | void j() noexcept { // expected-note {{here}} |
| 456 | try { |
| 457 | try { |
| 458 | throw 0; |
| 459 | } catch (int) {} |
| 460 | } catch (float) { |
| 461 | throw; // expected-warning {{still throw}} |
| 462 | } |
| 463 | } |
| 464 | } |
| 465 | |