| 1 | // RUN: %clang_cc1 -fcxx-exceptions -fexceptions -std=c++1y -fms-compatibility -fno-spell-checking -fsyntax-only -verify %s |
| 2 | |
| 3 | |
| 4 | template <class T> |
| 5 | class A { |
| 6 | public: |
| 7 | void f(T a) { }// expected-note 2{{must qualify identifier to find this declaration in dependent base class}} |
| 8 | void g();// expected-note 2{{must qualify identifier to find this declaration in dependent base class}} |
| 9 | }; |
| 10 | |
| 11 | template <class T> |
| 12 | class B : public A<T> { |
| 13 | public: |
| 14 | void z(T a) |
| 15 | { |
| 16 | f(a); // expected-warning 2{{use of identifier 'f' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 17 | g(); // expected-warning 2{{use of identifier 'g' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 18 | } |
| 19 | }; |
| 20 | |
| 21 | template class B<int>; // expected-note {{requested here}} |
| 22 | template class B<char>; // expected-note {{requested here}} |
| 23 | |
| 24 | void test() |
| 25 | { |
| 26 | B<int> b; |
| 27 | b.z(3); |
| 28 | } |
| 29 | |
| 30 | struct A2 { |
| 31 | template<class T> void f(T) { |
| 32 | XX; //expected-error {{use of undeclared identifier 'XX'}} |
| 33 | A2::XX; //expected-error {{no member named 'XX' in 'A2'}} |
| 34 | } |
| 35 | }; |
| 36 | template void A2::f(int); |
| 37 | |
| 38 | template<class T0> |
| 39 | struct A3 { |
| 40 | template<class T1> void f(T1) { |
| 41 | XX; //expected-error {{use of undeclared identifier 'XX'}} |
| 42 | } |
| 43 | }; |
| 44 | template void A3<int>::f(int); |
| 45 | |
| 46 | template<class T0> |
| 47 | struct A4 { |
| 48 | void f(char) { |
| 49 | XX; //expected-error {{use of undeclared identifier 'XX'}} |
| 50 | } |
| 51 | }; |
| 52 | template class A4<int>; |
| 53 | |
| 54 | |
| 55 | namespace lookup_dependent_bases_id_expr { |
| 56 | |
| 57 | template<class T> class A { |
| 58 | public: |
| 59 | int var; |
| 60 | }; |
| 61 | |
| 62 | |
| 63 | template<class T> |
| 64 | class B : public A<T> { |
| 65 | public: |
| 66 | void f() { |
| 67 | var = 3; // expected-warning {{use of undeclared identifier 'var'; unqualified lookup into dependent bases of class template 'B' is a Microsoft extension}} |
| 68 | } |
| 69 | }; |
| 70 | |
| 71 | template class B<int>; |
| 72 | |
| 73 | } |
| 74 | |
| 75 | |
| 76 | |
| 77 | namespace lookup_dependent_base_class_static_function { |
| 78 | |
| 79 | template <class T> |
| 80 | class A { |
| 81 | public: |
| 82 | static void static_func();// expected-note {{must qualify identifier to find this declaration in dependent base class}} |
| 83 | void func();// expected-note {{must qualify identifier to find this declaration in dependent base class}} |
| 84 | }; |
| 85 | |
| 86 | |
| 87 | template <class T> |
| 88 | class B : public A<T> { |
| 89 | public: |
| 90 | static void z2(){ |
| 91 | static_func(); // expected-warning {{use of identifier 'static_func' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 92 | func(); // expected-warning {{use of identifier 'func' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} expected-error {{call to non-static member function without an object argument}} |
| 93 | } |
| 94 | }; |
| 95 | template class B<int>; // expected-note {{requested here}} |
| 96 | |
| 97 | } |
| 98 | |
| 99 | |
| 100 | |
| 101 | namespace lookup_dependent_base_class_default_argument { |
| 102 | |
| 103 | template<class T> |
| 104 | class A { |
| 105 | public: |
| 106 | static int f1(); // expected-note {{must qualify identifier to find this declaration in dependent base class}} |
| 107 | int f2(); // expected-note {{must qualify identifier to find this declaration in dependent base class}} |
| 108 | }; |
| 109 | |
| 110 | template<class T> |
| 111 | class B : public A<T> { |
| 112 | public: |
| 113 | void g1(int p = f1());// expected-warning {{use of identifier 'f1' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 114 | void g2(int p = f2());// expected-warning {{use of identifier 'f2' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} expected-error {{call to non-static member function without an object argument}} |
| 115 | }; |
| 116 | |
| 117 | void foo() |
| 118 | { |
| 119 | B<int> b; |
| 120 | b.g1(); // expected-note {{required here}} |
| 121 | b.g2(); // expected-note {{required here}} |
| 122 | } |
| 123 | |
| 124 | } |
| 125 | |
| 126 | |
| 127 | namespace lookup_dependent_base_class_friend { |
| 128 | |
| 129 | template <class T> |
| 130 | class B { |
| 131 | public: |
| 132 | static void g(); // expected-note {{must qualify identifier to find this declaration in dependent base class}} |
| 133 | }; |
| 134 | |
| 135 | template <class T> |
| 136 | class A : public B<T> { |
| 137 | public: |
| 138 | friend void foo(A<T> p){ |
| 139 | g(); // expected-warning {{use of identifier 'g' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 140 | } |
| 141 | }; |
| 142 | |
| 143 | int main2() |
| 144 | { |
| 145 | A<int> a; |
| 146 | foo(a); // expected-note {{requested here}} |
| 147 | } |
| 148 | |
| 149 | } |
| 150 | |
| 151 | |
| 152 | namespace lookup_dependent_base_no_typo_correction { |
| 153 | |
| 154 | class C { |
| 155 | public: |
| 156 | int m_hWnd; |
| 157 | }; |
| 158 | |
| 159 | template <class T> |
| 160 | class A : public T { |
| 161 | public: |
| 162 | void f(int hWnd) { |
| 163 | m_hWnd = 1; // expected-warning {{use of undeclared identifier 'm_hWnd'; unqualified lookup into dependent bases of class template 'A' is a Microsoft extension}} |
| 164 | } |
| 165 | }; |
| 166 | |
| 167 | template class A<C>; |
| 168 | |
| 169 | } |
| 170 | |
| 171 | namespace PR12701 { |
| 172 | |
| 173 | class A {}; |
| 174 | class B {}; |
| 175 | |
| 176 | template <class T> |
| 177 | class Base { |
| 178 | public: |
| 179 | bool base_fun(void* p) { return false; } // expected-note {{must qualify identifier to find this declaration in dependent base class}} |
| 180 | operator T*() const { return 0; } |
| 181 | }; |
| 182 | |
| 183 | template <class T> |
| 184 | class Container : public Base<T> { |
| 185 | public: |
| 186 | template <typename S> |
| 187 | bool operator=(const Container<S>& rhs) { |
| 188 | return base_fun(rhs); // expected-warning {{use of identifier 'base_fun' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 189 | } |
| 190 | }; |
| 191 | |
| 192 | void f() { |
| 193 | Container<A> text_provider; |
| 194 | Container<B> text_provider2; |
| 195 | text_provider2 = text_provider; // expected-note {{in instantiation of function template specialization}} |
| 196 | } |
| 197 | |
| 198 | } // namespace PR12701 |
| 199 | |
| 200 | namespace PR16014 { |
| 201 | |
| 202 | struct A { |
| 203 | int a; |
| 204 | static int sa; |
| 205 | }; |
| 206 | template <typename T> struct B : T { |
| 207 | int foo() { return a; } // expected-warning {{lookup into dependent bases}} |
| 208 | int *bar() { return &a; } // expected-warning {{lookup into dependent bases}} |
| 209 | int baz() { return T::a; } |
| 210 | int T::*qux() { return &T::a; } |
| 211 | static int T::*stuff() { return &T::a; } |
| 212 | static int stuff1() { return T::sa; } |
| 213 | static int *stuff2() { return &T::sa; } |
| 214 | static int stuff3() { return sa; } // expected-warning {{lookup into dependent bases}} |
| 215 | static int *stuff4() { return &sa; } // expected-warning {{lookup into dependent bases}} |
| 216 | }; |
| 217 | |
| 218 | template <typename T> struct C : T { |
| 219 | int foo() { return b; } // expected-error {{no member named 'b' in 'PR16014::C<PR16014::A>'}} expected-warning {{lookup into dependent bases}} |
| 220 | int *bar() { return &b; } // expected-error {{no member named 'b' in 'PR16014::C<PR16014::A>'}} expected-warning {{lookup into dependent bases}} |
| 221 | int baz() { return T::b; } // expected-error {{no member named 'b' in 'PR16014::A'}} |
| 222 | int T::*qux() { return &T::b; } // expected-error {{no member named 'b' in 'PR16014::A'}} |
| 223 | int T::*fuz() { return &U::a; } // expected-error {{use of undeclared identifier 'U'}} \ |
| 224 | // expected-warning {{unqualified lookup into dependent bases of class template 'C'}} |
| 225 | }; |
| 226 | |
| 227 | template struct B<A>; |
| 228 | template struct C<A>; // expected-note-re 1+ {{in instantiation of member function 'PR16014::C<PR16014::A>::{{.*}}' requested here}} |
| 229 | |
| 230 | template <typename T> struct D : T { |
| 231 | struct Inner { |
| 232 | int foo() { |
| 233 | // FIXME: MSVC can find this in D's base T! Even worse, if ::sa exists, |
| 234 | // clang will use it instead. |
| 235 | return sa; // expected-error {{use of undeclared identifier 'sa'}} |
| 236 | } |
| 237 | }; |
| 238 | }; |
| 239 | template struct D<A>; |
| 240 | |
| 241 | } |
| 242 | |
| 243 | namespace PR19233 { |
| 244 | template <class T> |
| 245 | struct A : T { |
| 246 | void foo() { |
| 247 | ::undef(); // expected-error {{no member named 'undef' in the global namespace}} |
| 248 | } |
| 249 | void bar() { |
| 250 | ::UndefClass::undef(); // expected-error {{no member named 'UndefClass' in the global namespace}} |
| 251 | } |
| 252 | void baz() { |
| 253 | B::qux(); // expected-error {{use of undeclared identifier 'B'}} \ |
| 254 | // expected-warning {{unqualified lookup into dependent bases of class template 'A'}} |
| 255 | } |
| 256 | }; |
| 257 | |
| 258 | struct B { void qux(); }; |
| 259 | struct C : B { }; |
| 260 | template struct A<C>; // No error! B is a base of A<C>, and qux is available. |
| 261 | |
| 262 | struct D { }; |
| 263 | template struct A<D>; // expected-note {{in instantiation of member function 'PR19233::A<PR19233::D>::baz' requested here}} |
| 264 | |
| 265 | } |
| 266 | |
| 267 | namespace nonmethod_missing_this { |
| 268 | template <typename T> struct Base { int y = 42; }; |
| 269 | template <typename T> struct Derived : Base<T> { |
| 270 | int x = y; // expected-warning {{lookup into dependent bases}} |
| 271 | auto foo(int j) -> decltype(y * j) { // expected-warning {{lookup into dependent bases}} |
| 272 | return y * j; // expected-warning {{lookup into dependent bases}} |
| 273 | } |
| 274 | int bar() { |
| 275 | return [&] { return y; }(); // expected-warning {{lookup into dependent bases}} |
| 276 | } |
| 277 | }; |
| 278 | template struct Derived<int>; |
| 279 | } |
| 280 | |
| 281 | namespace typedef_in_base { |
| 282 | template <typename T> struct A { typedef T NameFromBase; }; |
| 283 | template <typename T> struct B : A<T> { |
| 284 | NameFromBase m; // expected-warning {{found via unqualified lookup into dependent bases}} |
| 285 | }; |
| 286 | static_assert(sizeof(B<int>) == 4, ""); |
| 287 | } |
| 288 | |
| 289 | namespace struct_in_base { |
| 290 | template <typename T> struct A { struct NameFromBase {}; }; |
| 291 | template <typename T> struct B : A<T> { |
| 292 | NameFromBase m; // expected-warning {{found via unqualified lookup into dependent bases}} |
| 293 | }; |
| 294 | static_assert(sizeof(B<int>) == 1, ""); |
| 295 | } |
| 296 | |
| 297 | namespace enum_in_base { |
| 298 | template <typename T> struct A { enum NameFromBase { X }; }; |
| 299 | template <typename T> struct B : A<T> { |
| 300 | NameFromBase m; // expected-warning {{found via unqualified lookup into dependent bases}} |
| 301 | }; |
| 302 | static_assert(sizeof(B<int>) == sizeof(A<int>::NameFromBase), ""); |
| 303 | } |
| 304 | |
| 305 | namespace two_types_in_base { |
| 306 | template <typename T> struct A { typedef T NameFromBase; }; // expected-note {{member found by ambiguous name lookup}} |
| 307 | template <typename T> struct B { struct NameFromBase { T m; }; }; // expected-note {{member found by ambiguous name lookup}} |
| 308 | template <typename T> struct C : A<T>, B<T> { |
| 309 | NameFromBase m; // expected-error {{member 'NameFromBase' found in multiple base classes of different types}} expected-warning {{use of identifier 'NameFromBase' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 310 | }; |
| 311 | static_assert(sizeof(C<int>) != 0, ""); // expected-note {{in instantiation of template class 'two_types_in_base::C<int>' requested here}} |
| 312 | } |
| 313 | |
| 314 | namespace type_and_decl_in_base { |
| 315 | template <typename T> struct A { typedef T NameFromBase; }; |
| 316 | template <typename T> struct B { static const T NameFromBase = 42; }; |
| 317 | template <typename T> struct C : A<T>, B<T> { |
| 318 | NameFromBase m; // expected-error {{unknown type name 'NameFromBase'}} |
| 319 | }; |
| 320 | } |
| 321 | |
| 322 | namespace classify_type_from_base { |
| 323 | template <typename T> struct A { struct NameFromBase {}; }; |
| 324 | template <typename T> struct B : A<T> { |
| 325 | A<NameFromBase> m; // expected-warning {{found via unqualified lookup into dependent bases}} |
| 326 | }; |
| 327 | } |
| 328 | |
| 329 | namespace classify_nontype_from_base { |
| 330 | // MSVC does not do lookup of non-type declarations from dependent template base |
| 331 | // classes. The extra lookup only applies to types. |
| 332 | template <typename T> struct A { void NameFromBase() {} }; |
| 333 | template <void (*F)()> struct B { }; |
| 334 | template <typename T> struct C : A<T> { |
| 335 | B<C::NameFromBase> a; // correct |
| 336 | B<NameFromBase> b; // expected-error {{use of undeclared identifier 'NameFromBase'}} |
| 337 | }; |
| 338 | } |
| 339 | |
| 340 | namespace template_in_base { |
| 341 | template <typename T> struct A { |
| 342 | template <typename U> struct NameFromBase { U x; }; |
| 343 | }; |
| 344 | template <typename T> struct B : A<T> { |
| 345 | // Correct form. |
| 346 | typename B::template NameFromBase<T> m; |
| 347 | }; |
| 348 | template <typename T> struct C : A<T> { |
| 349 | // Incorrect form. |
| 350 | NameFromBase<T> m; // expected-error {{no template named 'NameFromBase'}} |
| 351 | }; |
| 352 | } |
| 353 | |
| 354 | namespace type_in_inner_class_in_base { |
| 355 | template <typename T> |
| 356 | struct A { |
| 357 | struct B { typedef T NameFromBase; }; |
| 358 | }; |
| 359 | template <typename T> |
| 360 | struct C : A<T>::B { NameFromBase m; }; // expected-error {{unknown type name 'NameFromBase'}} |
| 361 | } |
| 362 | |
| 363 | namespace type_in_inner_template_class_in_base { |
| 364 | template <typename T> |
| 365 | struct A { |
| 366 | template <typename U> struct B { typedef U InnerType; }; |
| 367 | }; |
| 368 | template <typename T> |
| 369 | struct C : A<T>::template B<T> { |
| 370 | NameFromBase m; // expected-error {{unknown type name 'NameFromBase'}} |
| 371 | }; |
| 372 | } |
| 373 | |
| 374 | namespace have_nondependent_base { |
| 375 | template <typename T> |
| 376 | struct A { |
| 377 | // Nothing, lookup should fail. |
| 378 | }; |
| 379 | template <typename T> |
| 380 | struct B : A<T> { NameFromBase m; }; // expected-error {{unknown type name 'NameFromBase'}} |
| 381 | struct C : A<int> { NameFromBase m; }; // expected-error {{unknown type name 'NameFromBase'}} |
| 382 | } |
| 383 | |
| 384 | namespace type_in_base_of_dependent_base { |
| 385 | struct A { typedef int NameFromBase; }; |
| 386 | template <typename T> |
| 387 | struct B : A {}; |
| 388 | template <typename T> |
| 389 | struct C : B<T> { NameFromBase m; }; // expected-warning {{use of identifier 'NameFromBase' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 390 | } |
| 391 | |
| 392 | namespace type_in_second_dependent_base { |
| 393 | template <typename T> |
| 394 | struct A {}; |
| 395 | template<typename T> |
| 396 | struct B { typedef T NameFromBase; }; |
| 397 | template <typename T> |
| 398 | struct D : A<T>, B<T> { NameFromBase m; }; // expected-warning {{use of identifier 'NameFromBase' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 399 | } |
| 400 | |
| 401 | namespace type_in_second_non_dependent_base { |
| 402 | struct A {}; |
| 403 | struct B { typedef int NameFromBase; }; |
| 404 | template<typename T> |
| 405 | struct C : A, B {}; |
| 406 | template <typename T> |
| 407 | struct D : C<T> { NameFromBase m; }; // expected-warning {{use of identifier 'NameFromBase' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 408 | } |
| 409 | |
| 410 | namespace type_in_virtual_base_of_dependent_base { |
| 411 | template <typename T> |
| 412 | struct A { typedef T NameFromBase; }; |
| 413 | template <typename T> |
| 414 | struct B : virtual A<T> {}; |
| 415 | template <typename T> |
| 416 | struct C : B<T>, virtual A<T> { NameFromBase m; }; // expected-warning {{use of identifier 'NameFromBase' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 417 | C<int> c; |
| 418 | } |
| 419 | |
| 420 | namespace type_in_base_of_multiple_dependent_bases { |
| 421 | template <typename T> |
| 422 | struct A { typedef T NameFromBase; }; |
| 423 | template <typename T> |
| 424 | struct B : public A<T> {}; |
| 425 | template <typename T> |
| 426 | struct C : B<T>, public A<T> { NameFromBase m; }; // expected-warning {{use of identifier 'NameFromBase' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} expected-warning {{direct base 'A<int>' is inaccessible due to ambiguity:}} |
| 427 | C<int> c; // expected-note {{in instantiation of template class 'type_in_base_of_multiple_dependent_bases::C<int>' requested here}} |
| 428 | } |
| 429 | |
| 430 | namespace type_in_dependent_base_of_non_dependent_type { |
| 431 | template<typename T> struct A { typedef int NameFromBase; }; |
| 432 | template<typename T> struct B : A<T> { |
| 433 | struct C; |
| 434 | template<typename TT> |
| 435 | struct D : C { |
| 436 | NameFromBase m; // expected-warning {{use of identifier 'NameFromBase' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 437 | }; |
| 438 | struct E : C { |
| 439 | NameFromBase m; // expected-warning {{use of identifier 'NameFromBase' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 440 | }; |
| 441 | }; |
| 442 | template<typename T> struct B<T>::C : B { |
| 443 | NameFromBase m; // expected-warning {{use of identifier 'NameFromBase' found via unqualified lookup into dependent bases of class templates is a Microsoft extension}} |
| 444 | }; |
| 445 | template<typename T> struct F : B<T>::C { |
| 446 | NameFromBase m; // expected-error {{unknown type name 'NameFromBase'}} |
| 447 | }; |
| 448 | } |
| 449 | |
| 450 | namespace lookup_in_function_contexts { |
| 451 | template <typename T> struct A { typedef T NameFromBase; }; |
| 452 | template <typename T> |
| 453 | struct B : A<T> { |
| 454 | // expected-warning@+1 {{lookup into dependent bases}} |
| 455 | static auto lateSpecifiedFunc() -> decltype(NameFromBase()) { |
| 456 | return {}; |
| 457 | } |
| 458 | |
| 459 | static void memberFunc() { |
| 460 | NameFromBase x; // expected-warning {{lookup into dependent bases}} |
| 461 | } |
| 462 | |
| 463 | static void funcLocalClass() { |
| 464 | struct X { |
| 465 | NameFromBase x; // expected-warning {{lookup into dependent bases}} |
| 466 | } y; |
| 467 | } |
| 468 | |
| 469 | void localClassMethod() { |
| 470 | struct X { |
| 471 | void bar() { |
| 472 | NameFromBase m; // expected-warning {{lookup into dependent bases}} |
| 473 | } |
| 474 | } x; |
| 475 | x.bar(); |
| 476 | } |
| 477 | |
| 478 | static void funcLambda() { |
| 479 | auto l = []() { |
| 480 | NameFromBase x; // expected-warning {{lookup into dependent bases}} |
| 481 | }; |
| 482 | l(); |
| 483 | } |
| 484 | |
| 485 | static constexpr int constexprFunc() { |
| 486 | NameFromBase x = {}; // expected-warning {{lookup into dependent bases}} |
| 487 | return sizeof(x); |
| 488 | } |
| 489 | |
| 490 | static auto autoFunc() { |
| 491 | NameFromBase x; // expected-warning {{lookup into dependent bases}} |
| 492 | return x; |
| 493 | } |
| 494 | }; |
| 495 | |
| 496 | // Force us to parse the methods. |
| 497 | template struct B<int>; |
| 498 | } |
| 499 | |
| 500 | namespace function_template_deduction { |
| 501 | // Overloaded function templates. |
| 502 | template <int N> int f() { return N; } |
| 503 | template <typename T> int f() { return sizeof(T); } |
| 504 | |
| 505 | // Dependent base class with type. |
| 506 | template <typename T> |
| 507 | struct A { typedef T NameFromBase; }; |
| 508 | template <typename T> |
| 509 | struct B : A<T> { |
| 510 | // expected-warning@+1 {{found via unqualified lookup into dependent bases}} |
| 511 | int x = f<NameFromBase>(); |
| 512 | }; |
| 513 | |
| 514 | // Dependent base class with enum. |
| 515 | template <typename T> struct C { enum { NameFromBase = 4 }; }; |
| 516 | template <typename T> struct D : C<T> { |
| 517 | // expected-warning@+1 {{use of undeclared identifier 'NameFromBase'; unqualified lookup into dependent bases}} |
| 518 | int x = f<NameFromBase>(); |
| 519 | }; |
| 520 | } |
| 521 | |
| 522 | namespace function_template_undef_impl { |
| 523 | template<class T> |
| 524 | void f() { |
| 525 | Undef::staticMethod(); // expected-error {{use of undeclared identifier 'Undef'}} |
| 526 | UndefVar.method(); // expected-error {{use of undeclared identifier 'UndefVar'}} |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | namespace PR20716 { |
| 531 | template <template <typename T> class A> |
| 532 | struct B : A<int> |
| 533 | { |
| 534 | XXX x; // expected-error {{unknown type name}} |
| 535 | }; |
| 536 | |
| 537 | template <typename T> |
| 538 | struct C {}; |
| 539 | |
| 540 | template <typename T> |
| 541 | using D = C<T>; |
| 542 | |
| 543 | template <typename T> |
| 544 | struct E : D<T> |
| 545 | { |
| 546 | XXX x; // expected-error {{unknown type name}} |
| 547 | }; |
| 548 | } |
| 549 | |
| 550 | namespace PR23810 { |
| 551 | void f(int); |
| 552 | struct Base { |
| 553 | void f(); // expected-note{{must qualify identifier to find this declaration in dependent base class}} |
| 554 | }; |
| 555 | template <typename T> struct Template : T { |
| 556 | void member() { |
| 557 | f(); // expected-warning {{found via unqualified lookup into dependent bases}} |
| 558 | } |
| 559 | }; |
| 560 | void test() { |
| 561 | Template<Base> x; |
| 562 | x.member(); // expected-note{{requested here}} |
| 563 | }; |
| 564 | } |
| 565 | |
| 566 | namespace PR23823 { |
| 567 | // Don't delay lookup in SFINAE context. |
| 568 | template <typename T> decltype(g(T())) check(); // expected-note{{candidate template ignored: substitution failure [with T = int]: use of undeclared identifier 'g'}} |
| 569 | decltype(check<int>()) x; // expected-error{{no matching function for call to 'check'}} |
| 570 | |
| 571 | void h(); |
| 572 | template <typename T> decltype(h(T())) check2(); // expected-note{{candidate template ignored: substitution failure [with T = int]: no matching function for call to 'h'}} |
| 573 | decltype(check2<int>()) y; // expected-error{{no matching function for call to 'check2'}} |
| 574 | } |
| 575 | |
| 576 | // We also allow unqualified lookup into bases in contexts where the we know the |
| 577 | // undeclared identifier *must* be a type, such as a new expression or catch |
| 578 | // parameter type. |
| 579 | template <typename T> |
| 580 | struct UseUnqualifiedTypeNames : T { |
| 581 | void foo() { |
| 582 | void *P = new TheType; // expected-warning {{unqualified lookup}} expected-error {{no type}} |
| 583 | size_t x = __builtin_offsetof(TheType, f2); // expected-warning {{unqualified lookup}} expected-error {{no type}} |
| 584 | try { |
| 585 | } catch (TheType) { // expected-warning {{unqualified lookup}} expected-error {{no type}} |
| 586 | } |
| 587 | enum E : IntegerType { E0 = 42 }; // expected-warning {{unqualified lookup}} expected-error {{no type}} |
| 588 | _Atomic(TheType) a; // expected-warning {{unqualified lookup}} expected-error {{no type}} |
| 589 | } |
| 590 | void out_of_line(); |
| 591 | }; |
| 592 | template <typename T> |
| 593 | void UseUnqualifiedTypeNames<T>::out_of_line() { |
| 594 | void *p = new TheType; // expected-warning {{unqualified lookup}} expected-error {{no type}} |
| 595 | } |
| 596 | struct Base { |
| 597 | typedef int IntegerType; |
| 598 | struct TheType { |
| 599 | int f1, f2; |
| 600 | }; |
| 601 | }; |
| 602 | template struct UseUnqualifiedTypeNames<Base>; |
| 603 | struct BadBase { }; |
| 604 | template struct UseUnqualifiedTypeNames<BadBase>; // expected-note-re 2 {{in instantiation {{.*}} requested here}} |
| 605 | |
| 606 | namespace partial_template_lookup { |
| 607 | |
| 608 | class Bar; |
| 609 | class Spare; |
| 610 | |
| 611 | template <class T, class X = Bar> |
| 612 | class FooTemplated; |
| 613 | |
| 614 | class FooBase { |
| 615 | public: |
| 616 | typedef int BaseTypedef; |
| 617 | }; |
| 618 | |
| 619 | // Partial template spec (unused) |
| 620 | template <class T> |
| 621 | class FooTemplated<T, Spare> {}; |
| 622 | |
| 623 | // Partial template spec (used) |
| 624 | template <class T> |
| 625 | class FooTemplated<T, Bar> : public FooBase {}; |
| 626 | |
| 627 | // Full template spec |
| 628 | template <class T, class X> |
| 629 | class FooTemplated : public FooTemplated<T, Bar> { |
| 630 | public: |
| 631 | BaseTypedef Member; // expected-warning {{unqualified lookup}} |
| 632 | }; |
| 633 | } |
| 634 | |