1 // RUN: %clang_cc1 -std=c++0x -fsyntax-only -fexceptions -verify %s 2 3 struct one { char c[1]; }; 4 struct two { char c[2]; }; 5 6 namespace std { 7 typedef decltype(sizeof(int)) size_t; 8 9 // libc++'s implementation 10 template <class _E> 11 class initializer_list 12 { 13 const _E* __begin_; 14 size_t __size_; 15 16 initializer_list(const _E* __b, size_t __s) 17 : __begin_(__b), 18 __size_(__s) 19 {} 20 21 public: 22 typedef _E value_type; 23 typedef const _E& reference; 24 typedef const _E& const_reference; 25 typedef size_t size_type; 26 27 typedef const _E* iterator; 28 typedef const _E* const_iterator; 29 30 initializer_list() : __begin_(nullptr), __size_(0) {} 31 32 size_t size() const {return __size_;} 33 const _E* begin() const {return __begin_;} 34 const _E* end() const {return __begin_ + __size_;} 35 }; 36 } 37 38 namespace objects { 39 40 struct X1 { X1(int); }; 41 struct X2 { explicit X2(int); }; // expected-note {{constructor declared here}} 42 43 template <int N> 44 struct A { 45 A() { static_assert(N == 0, ""); } 46 A(int, double) { static_assert(N == 1, ""); } 47 }; 48 49 template <int N> 50 struct F { 51 F() { static_assert(N == 0, ""); } 52 F(int, double) { static_assert(N == 1, ""); } 53 F(std::initializer_list<int>) { static_assert(N == 3, ""); } 54 }; 55 56 template <int N> 57 struct D { 58 D(std::initializer_list<int>) { static_assert(N == 0, ""); } // expected-note 1 {{candidate}} 59 D(std::initializer_list<double>) { static_assert(N == 1, ""); } // expected-note 1 {{candidate}} 60 }; 61 62 template <int N> 63 struct E { 64 E(int, int) { static_assert(N == 0, ""); } 65 E(X1, int) { static_assert(N == 1, ""); } 66 }; 67 68 void overload_resolution() { 69 { A<0> a{}; } 70 { A<0> a = {}; } 71 { A<1> a{1, 1.0}; } 72 { A<1> a = {1, 1.0}; } 73 74 { F<0> f{}; } 75 { F<0> f = {}; } 76 // Narrowing conversions don't affect viability. The next two choose 77 // the initializer_list constructor. 78 { F<3> f{1, 1.0}; } // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}} 79 { F<3> f = {1, 1.0}; } // expected-error {{type 'double' cannot be narrowed to 'int' in initializer list}} expected-note {{silence}} 80 { F<3> f{1, 2, 3, 4, 5, 6, 7, 8}; } 81 { F<3> f = {1, 2, 3, 4, 5, 6, 7, 8}; } 82 { F<3> f{1, 2, 3, 4, 5, 6, 7, 8}; } 83 { F<3> f{1, 2}; } 84 85 { D<0> d{1, 2, 3}; } 86 { D<1> d{1.0, 2.0, 3.0}; } 87 { D<-1> d{1, 2.0}; } // expected-error {{ambiguous}} 88 89 { E<0> e{1, 2}; } 90 } 91 92 void explicit_implicit() { 93 { X1 x{0}; } 94 { X1 x = {0}; } 95 { X2 x{0}; } 96 { X2 x = {0}; } // expected-error {{constructor is explicit}} 97 } 98 99 struct C { 100 C(); 101 C(int, double); 102 C(int, int); 103 104 int operator[](C); 105 }; 106 107 C function_call() { 108 void takes_C(C); 109 takes_C({1, 1.0}); 110 111 C c; 112 c[{1, 1.0}]; 113 114 return {1, 1.0}; 115 } 116 117 void inline_init() { 118 (void) C{1, 1.0}; 119 (void) new C{1, 1.0}; 120 (void) A<1>{1, 1.0}; 121 (void) new A<1>{1, 1.0}; 122 } 123 124 struct B { // expected-note 2 {{candidate constructor}} 125 B(C, int, C); // expected-note {{candidate constructor not viable: cannot convert initializer list argument to 'objects::C'}} 126 }; 127 128 void nested_init() { 129 B b1{{1, 1.0}, 2, {3, 4}}; 130 B b2{{1, 1.0, 4}, 2, {3, 4}}; // expected-error {{no matching constructor for initialization of 'objects::B'}} 131 } 132 133 void overloaded_call() { 134 one ov1(B); // expected-note {{not viable: cannot convert initializer list}} 135 two ov1(C); // expected-note {{not viable: cannot convert initializer list}} 136 137 static_assert(sizeof(ov1({})) == sizeof(two), "bad overload"); 138 static_assert(sizeof(ov1({1, 2})) == sizeof(two), "bad overload"); 139 static_assert(sizeof(ov1({{1, 1.0}, 2, {3, 4}})) == sizeof(one), "bad overload"); 140 141 ov1({1}); // expected-error {{no matching function}} 142 143 one ov2(int); 144 two ov2(F<3>); 145 // expected-warning@+1 {{braces around scalar initializer}} 146 static_assert(sizeof(ov2({1})) == sizeof(one), "bad overload"); // list -> int ranks as identity 147 static_assert(sizeof(ov2({1, 2, 3})) == sizeof(two), "bad overload"); // list -> F only viable 148 } 149 150 struct G { // expected-note 6 {{not viable}} 151 // This is not an initializer-list constructor. 152 template<typename ...T> 153 G(std::initializer_list<int>, T ...); // expected-note 3 {{not viable}} 154 }; 155 156 struct H { // expected-note 6 {{not viable}} 157 explicit H(int, int); // expected-note 3 {{not viable}} expected-note {{declared here}} 158 H(int, void*); // expected-note 3 {{not viable}} 159 }; 160 161 void edge_cases() { 162 // invalid (the first phase only considers init-list ctors) 163 // (for the second phase, no constructor is viable) 164 G g1{1, 2, 3}; // expected-error {{no matching constructor}} 165 (void) new G{1, 2, 3}; // expected-error {{no matching constructor}} 166 (void) G{1, 2, 3} // expected-error {{no matching constructor}} 167 168 // valid (T deduced to <>). 169 G g2({1, 2, 3}); 170 (void) new G({1, 2, 3}); 171 (void) G({1, 2, 3}); 172 173 // invalid 174 H h1({1, 2}); // expected-error {{no matching constructor}} 175 (void) new H({1, 2}); // expected-error {{no matching constructor}} 176 // FIXME: Bad diagnostic, mentions void type instead of init list. 177 (void) H({1, 2}); // expected-error {{no matching conversion}} 178 179 // valid (by copy constructor). 180 H h2({1, nullptr}); 181 (void) new H({1, nullptr}); 182 (void) H({1, nullptr}); 183 184 // valid 185 H h3{1, 2}; 186 (void) new H{1, 2}; 187 (void) H{1, 2}; 188 } 189 190 struct memberinit { 191 H h1{1, nullptr}; 192 H h2 = {1, nullptr}; 193 H h3{1, 1}; 194 H h4 = {1, 1}; // expected-error {{constructor is explicit}} 195 }; 196 } 197 198 namespace PR12092 { 199 200 struct S { 201 S(const char*); 202 }; 203 struct V { 204 template<typename T> V(T, T); 205 void f(std::initializer_list<S>); 206 void f(const V &); 207 }; 208 209 void g() { 210 extern V s; 211 s.f({"foo", "bar"}); 212 } 213 214 } 215 216 namespace PR12117 { 217 struct A { A(int); }; 218 struct B { B(A); } b{{0}}; //FIXME: non-conformant. Temporary fix until standard resolution. 219 // expected- error {{call to constructor of 'struct B' is ambiguous}} \ 220 // expected- note 2{{candidate is the implicit}} \ 221 // expected- note {{candidate constructor}} 222 struct C { C(int); } c{0}; 223 } 224 225 namespace PR12167 { 226 template<int N> struct string {}; 227 228 struct X { 229 X(const char v); 230 template<typename T> bool operator()(T) const; 231 }; 232 233 template<int N, class Comparator> bool g(const string<N>& s, Comparator cmp) { 234 return cmp(s); 235 } 236 template<int N> bool f(const string<N> &s) { 237 return g(s, X{'x'}); 238 } 239 240 bool s = f(string<1>()); 241 } 242 243 namespace PR12257_PR12241 { 244 struct command_pair 245 { 246 command_pair(int, int); 247 }; 248 249 struct command_map 250 { 251 command_map(std::initializer_list<command_pair>); 252 }; 253 254 struct generator_pair 255 { 256 generator_pair(const command_map); 257 }; 258 259 // 5 levels: init list, gen_pair, command_map, init list, command_pair 260 const std::initializer_list<generator_pair> x = {{{{{3, 4}}}}}; 261 262 // 4 levels: init list, gen_pair, command_map via init list, command_pair 263 const std::initializer_list<generator_pair> y = {{{{1, 2}}}}; 264 } 265 266 namespace PR12120 { 267 struct A { explicit A(int); A(float); }; // expected-note {{declared here}} 268 A a = { 0 }; // expected-error {{constructor is explicit}} 269 270 struct B { explicit B(short); B(long); }; // expected-note 2 {{candidate}} 271 B b = { 0 }; // expected-error {{ambiguous}} 272 } 273 274 namespace PR12498 { 275 class ArrayRef; // expected-note{{forward declaration}} 276 277 struct C { 278 void foo(const ArrayRef&); // expected-note{{passing argument to parameter here}} 279 }; 280 281 static void bar(C* c) 282 { 283 c->foo({ nullptr, 1 }); // expected-error{{initialization of incomplete type 'const PR12498::ArrayRef'}} 284 } 285 } 286 287 namespace explicit_default { 288 struct A { 289 explicit A(); // expected-note{{here}} 290 }; 291 A a {}; // ok 292 // This is copy-list-initialization, and we choose an explicit constructor 293 // (even though we do so via value-initialization), so the initialization is 294 // ill-formed. 295 A b = {}; // expected-error{{chosen constructor is explicit}} 296 } 297 298 namespace init_list_default { 299 struct A { 300 A(std::initializer_list<int>); 301 }; 302 A a {}; // calls initializer list constructor 303 304 struct B { 305 B(); 306 B(std::initializer_list<int>) = delete; 307 }; 308 B b {}; // calls default constructor 309 } 310 311 // PR13470, <rdar://problem/11974632> 312 namespace PR13470 { 313 struct W { 314 explicit W(int); // expected-note {{here}} 315 }; 316 317 struct X { 318 X(const X&) = delete; // expected-note 3 {{here}} 319 X(int); 320 }; 321 322 template<typename T, typename Fn> void call(Fn f) { 323 f({1}); // expected-error {{constructor is explicit}} 324 f(T{1}); // expected-error {{call to deleted constructor}} 325 } 326 327 void ref_w(const W &); // expected-note 2 {{not viable}} 328 void call_ref_w() { 329 ref_w({1}); // expected-error {{no matching function}} 330 ref_w(W{1}); 331 call<W>(ref_w); // expected-note {{instantiation of}} 332 } 333 334 void ref_x(const X &); 335 void call_ref_x() { 336 ref_x({1}); 337 ref_x(X{1}); 338 call<X>(ref_x); // ok 339 } 340 341 void val_x(X); // expected-note 2 {{parameter}} 342 void call_val_x() { 343 val_x({1}); 344 val_x(X{1}); // expected-error {{call to deleted constructor}} 345 call<X>(val_x); // expected-note {{instantiation of}} 346 } 347 348 template<typename T> 349 struct Y { 350 X x{1}; 351 void f() { X x{1}; } 352 void h() { 353 ref_w({1}); // expected-error {{no matching function}} 354 ref_w(W{1}); 355 ref_x({1}); 356 ref_x(X{1}); 357 val_x({1}); 358 val_x(X{1}); // expected-error {{call to deleted constructor}} 359 } 360 Y() {} 361 Y(int) : x{1} {} 362 }; 363 364 Y<int> yi; 365 Y<int> yi2(0); 366 void g() { 367 yi.f(); 368 yi.h(); // ok, all diagnostics produced in template definition 369 } 370 } 371 372 namespace PR19729 { 373 struct A { 374 A(int); 375 A(const A&) = delete; 376 }; 377 struct B { 378 void *operator new(std::size_t, A); 379 }; 380 B *p = new ({123}) B; 381 } 382 383 namespace PR11410 { 384 struct A { 385 A() = delete; // expected-note 2{{deleted here}} 386 A(int); 387 }; 388 389 A a[3] = { 390 {1}, {2} 391 }; // expected-error {{call to deleted constructor}} \ 392 expected-note {{in implicit initialization of array element 2 with omitted initializer}} 393 394 struct B { 395 A a; // expected-note {{in implicit initialization of field 'a'}} 396 } b = { 397 }; // expected-error {{call to deleted constructor}} 398 399 struct C { 400 C(int = 0); // expected-note 2{{candidate}} 401 C(float = 0); // expected-note 2{{candidate}} 402 }; 403 C c[3] = { 404 0, 1 405 }; // expected-error {{ambiguous}} expected-note {{in implicit initialization of array element 2}} 406 C c2[3] = { 407 [0] = 1, [2] = 3 408 }; // expected-error {{ambiguous}} expected-note {{in implicit initialization of array element 1}} 409 } 410
