| 1 | // RUN: %clang_cc1 -fcxx-exceptions -fexceptions -std=c++11 -fblocks -fms-extensions -fsyntax-only -verify %s |
| 2 | |
| 3 | template<typename T, typename U> struct pair; |
| 4 | template<typename ...> struct tuple; |
| 5 | |
| 6 | // A parameter pack whose name appears within the pattern of a pack |
| 7 | // expansion is expanded by that pack expansion. An appearance of the |
| 8 | // name of a parameter pack is only expanded by the innermost |
| 9 | // enclosing pack expansion. The pattern of a pack expansion shall |
| 10 | // name one or more parameter packs that are not expanded by a nested |
| 11 | // pack expansion. |
| 12 | template<typename... Types> |
| 13 | struct Expansion { |
| 14 | typedef pair<Types..., int> expand_with_pacs; // okay |
| 15 | typedef pair<Types, int...> expand_no_packs; // expected-error{{pack expansion does not contain any unexpanded parameter packs}} |
| 16 | typedef pair<pair<Types..., int>..., int> expand_with_expanded_nested; // expected-error{{pack expansion does not contain any unexpanded parameter packs}} |
| 17 | }; |
| 18 | |
| 19 | // All of the parameter packs expanded by a pack expansion shall have |
| 20 | // the same number of arguments specified. |
| 21 | template<typename ...Types> |
| 22 | struct ExpansionLengthMismatch { |
| 23 | template<typename ...OtherTypes> |
| 24 | struct Inner { |
| 25 | typedef tuple<pair<Types, OtherTypes>...> type; // expected-error{{pack expansion contains parameter packs 'Types' and 'OtherTypes' that have different lengths (3 vs. 2)}} |
| 26 | }; |
| 27 | }; |
| 28 | |
| 29 | ExpansionLengthMismatch<int, long>::Inner<unsigned int, unsigned long>::type |
| 30 | *il_pairs; |
| 31 | tuple<pair<int, unsigned int>, pair<long, unsigned long> >*il_pairs_2 = il_pairs; |
| 32 | |
| 33 | ExpansionLengthMismatch<short, int, long>::Inner<unsigned int, unsigned long>::type // expected-note{{in instantiation of template class 'ExpansionLengthMismatch<short, int, long>::Inner<unsigned int, unsigned long>' requested here}} |
| 34 | *il_pairs_bad; |
| 35 | |
| 36 | |
| 37 | // An appearance of a name of a parameter pack that is not expanded is |
| 38 | // ill-formed. |
| 39 | |
| 40 | // Test for unexpanded parameter packs in each of the type nodes. |
| 41 | template<typename T, int N, typename ... Types> |
| 42 | struct TestPPName |
| 43 | : public Types, public T // expected-error{{base type contains unexpanded parameter pack 'Types'}} |
| 44 | { |
| 45 | // BuiltinType is uninteresting |
| 46 | // FIXME: ComplexType is uninteresting? |
| 47 | // PointerType |
| 48 | typedef Types *types_pointer; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 49 | |
| 50 | // BlockPointerType |
| 51 | typedef Types (^block_pointer_1)(int); // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 52 | typedef int (^block_pointer_2)(Types); // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 53 | |
| 54 | // LValueReferenceType |
| 55 | typedef Types &lvalue_ref; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 56 | |
| 57 | // RValueReferenceType |
| 58 | typedef Types &&rvalue_ref; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 59 | |
| 60 | // MemberPointerType |
| 61 | typedef Types TestPPName::* member_pointer_1; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 62 | typedef int Types::*member_pointer_2; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 63 | |
| 64 | // ConstantArrayType |
| 65 | typedef Types constant_array[17]; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 66 | |
| 67 | // IncompleteArrayType |
| 68 | typedef Types incomplete_array[]; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 69 | |
| 70 | // VariableArrayType |
| 71 | void f(int i) { |
| 72 | Types variable_array[i]; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 73 | } |
| 74 | |
| 75 | // DependentSizedArrayType |
| 76 | typedef Types dependent_sized_array[N]; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 77 | |
| 78 | // DependentSizedExtVectorType |
| 79 | typedef Types dependent_sized_ext_vector __attribute__((ext_vector_type(N))); // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 80 | |
| 81 | // VectorType is uninteresting |
| 82 | |
| 83 | // ExtVectorType |
| 84 | typedef Types ext_vector __attribute__((ext_vector_type(4))); // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 85 | |
| 86 | // FunctionProtoType |
| 87 | typedef Types (function_type_1)(int); // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 88 | typedef int (function_type_2)(Types); // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 89 | |
| 90 | // FunctionNoProtoType is uninteresting |
| 91 | // UnresolvedUsingType is uninteresting |
| 92 | // ParenType is uninteresting |
| 93 | // TypedefType is uninteresting |
| 94 | |
| 95 | // TypeOfExprType |
| 96 | typedef __typeof__((static_cast<Types>(0))) typeof_expr; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 97 | |
| 98 | // TypeOfType |
| 99 | typedef __typeof__(Types) typeof_type; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 100 | |
| 101 | // DecltypeType |
| 102 | typedef decltype((static_cast<Types>(0))) typeof_expr; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 103 | |
| 104 | // RecordType is uninteresting |
| 105 | // EnumType is uninteresting |
| 106 | // ElaboratedType is uninteresting |
| 107 | |
| 108 | // TemplateTypeParmType |
| 109 | typedef Types template_type_parm; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 110 | |
| 111 | // SubstTemplateTypeParmType is uninteresting |
| 112 | |
| 113 | // TemplateSpecializationType |
| 114 | typedef pair<Types, int> template_specialization; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 115 | |
| 116 | // InjectedClassName is uninteresting. |
| 117 | |
| 118 | // DependentNameType |
| 119 | typedef typename Types::type dependent_name; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 120 | |
| 121 | // DependentTemplateSpecializationType |
| 122 | typedef typename Types::template apply<int> dependent_name_1; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 123 | typedef typename T::template apply<Types> dependent_name_2; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 124 | |
| 125 | // ObjCObjectType is uninteresting |
| 126 | // ObjCInterfaceType is uninteresting |
| 127 | // ObjCObjectPointerType is uninteresting |
| 128 | }; |
| 129 | |
| 130 | // FIXME: Test for unexpanded parameter packs in each of the expression nodes. |
| 131 | template<int ...Values> |
| 132 | void test_unexpanded_in_exprs() { |
| 133 | // PredefinedExpr is uninteresting |
| 134 | // DeclRefExpr |
| 135 | Values; // expected-error{{expression contains unexpanded parameter pack 'Values'}} |
| 136 | // IntegerLiteral is uninteresting |
| 137 | // FloatingLiteral is uninteresting |
| 138 | // ImaginaryLiteral is uninteresting |
| 139 | // StringLiteral is uninteresting |
| 140 | // CharacterLiteral is uninteresting |
| 141 | (Values); // expected-error{{expression contains unexpanded parameter pack 'Values'}} |
| 142 | // UnaryOperator |
| 143 | -Values; // expected-error{{expression contains unexpanded parameter pack 'Values'}} |
| 144 | // OffsetOfExpr |
| 145 | struct OffsetMe { |
| 146 | int array[17]; |
| 147 | }; |
| 148 | __builtin_offsetof(OffsetMe, array[Values]); // expected-error{{expression contains unexpanded parameter pack 'Values'}} |
| 149 | // FIXME: continue this... |
| 150 | } |
| 151 | |
| 152 | template<typename ... Types> |
| 153 | void TestPPNameFunc(int i) { |
| 154 | f(static_cast<Types>(i)); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 155 | } |
| 156 | |
| 157 | template<typename T, template<class> class ...Meta> |
| 158 | struct TestUnexpandedTTP { |
| 159 | typedef tuple<typename Meta<T>::type> type; // expected-error{{declaration type contains unexpanded parameter pack 'Meta'}} |
| 160 | }; |
| 161 | |
| 162 | // Test for unexpanded parameter packs in declarations. |
| 163 | template<typename T, typename... Types> |
| 164 | // FIXME: this should test that the diagnostic reads "type contains..." |
| 165 | struct alignas(Types) TestUnexpandedDecls : T{ // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 166 | void member_function(Types); // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 167 | void member_function () throw(Types); // expected-error{{exception type contains unexpanded parameter pack 'Types'}} |
| 168 | void member_function2() noexcept(Types()); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 169 | operator Types() const; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 170 | Types data_member; // expected-error{{data member type contains unexpanded parameter pack 'Types'}} |
| 171 | static Types static_data_member; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 172 | unsigned bit_field : static_cast<Types>(0); // expected-error{{bit-field size contains unexpanded parameter pack 'Types'}} |
| 173 | static_assert(static_cast<Types>(0), "Boom"); // expected-error{{static assertion contains unexpanded parameter pack 'Types'}} |
| 174 | |
| 175 | enum E0 : Types { // expected-error{{fixed underlying type contains unexpanded parameter pack 'Types'}} |
| 176 | EnumValue = static_cast<Types>(0) // expected-error{{enumerator value contains unexpanded parameter pack 'Types'}} |
| 177 | }; |
| 178 | |
| 179 | using typename Types::type; // expected-error{{using declaration contains unexpanded parameter pack 'Types'}} |
| 180 | using Types::value; // expected-error{{using declaration contains unexpanded parameter pack 'Types'}} |
| 181 | using T::operator Types; // expected-error{{using declaration contains unexpanded parameter pack 'Types'}} |
| 182 | |
| 183 | friend class Types::foo; // expected-error{{friend declaration contains unexpanded parameter pack 'Types'}} |
| 184 | friend void friend_func(Types); // expected-error{{friend declaration contains unexpanded parameter pack 'Types'}} |
| 185 | friend void Types::other_friend_func(int); // expected-error{{friend declaration contains unexpanded parameter pack 'Types'}} |
| 186 | |
| 187 | void test_initializers() { |
| 188 | T copy_init = static_cast<Types>(0); // expected-error{{initializer contains unexpanded parameter pack 'Types'}} |
| 189 | T direct_init(0, static_cast<Types>(0)); // expected-error{{initializer contains unexpanded parameter pack 'Types'}} |
| 190 | T list_init = { static_cast<Types>(0) }; // expected-error{{initializer contains unexpanded parameter pack 'Types'}} |
| 191 | } |
| 192 | |
| 193 | T in_class_member_init = static_cast<Types>(0); // expected-error{{initializer contains unexpanded parameter pack 'Types'}} |
| 194 | TestUnexpandedDecls() : |
| 195 | Types(static_cast<Types>(0)), // expected-error{{initializer contains unexpanded parameter pack 'Types'}} |
| 196 | Types(static_cast<Types>(0))..., |
| 197 | in_class_member_init(static_cast<Types>(0)) {} // expected-error{{initializer contains unexpanded parameter pack 'Types'}} |
| 198 | |
| 199 | void default_function_args(T = static_cast<Types>(0)); // expected-error{{default argument contains unexpanded parameter pack 'Types'}} |
| 200 | |
| 201 | template<typename = Types*> // expected-error{{default argument contains unexpanded parameter pack 'Types'}} |
| 202 | struct default_template_args_1; |
| 203 | template<int = static_cast<Types>(0)> // expected-error{{default argument contains unexpanded parameter pack 'Types'}} |
| 204 | struct default_template_args_2; |
| 205 | template<template<typename> class = Types::template apply> // expected-error{{default argument contains unexpanded parameter pack 'Types'}} |
| 206 | struct default_template_args_3; |
| 207 | |
| 208 | template<Types value> // expected-error{{non-type template parameter type contains unexpanded parameter pack 'Types'}} |
| 209 | struct non_type_template_param_type; |
| 210 | |
| 211 | void decls_in_stmts() { |
| 212 | Types t; // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 213 | for (Types *t = 0; ; ) { } // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 214 | for (; Types *t = 0; ) { } // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 215 | T a[] = { T(), T(), T() }; |
| 216 | for (Types t : a) { } // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 217 | switch(Types *t = 0) { } // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 218 | while(Types *t = 0) { } // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 219 | if (Types *t = 0) { } // expected-error{{declaration type contains unexpanded parameter pack 'Types'}} |
| 220 | try { |
| 221 | } catch (Types*) { // expected-error{{exception type contains unexpanded parameter pack 'Types'}} |
| 222 | } |
| 223 | } |
| 224 | }; |
| 225 | |
| 226 | // FIXME: Test for unexpanded parameter packs in each of the statements. |
| 227 | struct X { |
| 228 | void f(int, int); |
| 229 | template<typename ...Types> |
| 230 | void f(Types...); |
| 231 | }; |
| 232 | |
| 233 | namespace std { |
| 234 | class type_info; |
| 235 | } |
| 236 | |
| 237 | typedef struct _GUID { |
| 238 | unsigned long Data1; |
| 239 | unsigned short Data2; |
| 240 | unsigned short Data3; |
| 241 | unsigned char Data4[ 8 ]; |
| 242 | } GUID; |
| 243 | |
| 244 | template<typename T, typename ...Types> |
| 245 | void test_unexpanded_exprs(Types ...values) { |
| 246 | // CXXOperatorCallExpr |
| 247 | (void)(values + 0); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 248 | (void)(0 + values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 249 | |
| 250 | // CXXMemberCallExpr |
| 251 | values.f(); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 252 | X x; |
| 253 | x.f(values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 254 | x.Types::f(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 255 | x.f<Types>(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 256 | |
| 257 | // CXXStaticCastExpr |
| 258 | (void)static_cast<Types&>(values); // expected-error{{expression contains unexpanded parameter packs 'Types' and 'values'}} |
| 259 | |
| 260 | // CXXDynamicCastExpr |
| 261 | (void)dynamic_cast<Types&>(values); // expected-error{{expression contains unexpanded parameter packs 'Types' and 'values'}} |
| 262 | |
| 263 | // CXXReinterpretCastExpr |
| 264 | (void)reinterpret_cast<Types&>(values); // expected-error{{expression contains unexpanded parameter packs 'Types' and 'values'}} |
| 265 | |
| 266 | // CXXConstCastExpr |
| 267 | (void)const_cast<Types&>(values); // expected-error{{expression contains unexpanded parameter packs 'Types' and 'values'}} |
| 268 | |
| 269 | // CXXTypeidExpr |
| 270 | (void)typeid(Types); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 271 | (void)typeid(values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 272 | |
| 273 | // CXXUuidofExpr |
| 274 | (void)__uuidof(Types); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 275 | (void)__uuidof(values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 276 | |
| 277 | // CXXThisExpr is uninteresting |
| 278 | |
| 279 | // CXXThrowExpr |
| 280 | throw Types(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 281 | throw values; // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 282 | |
| 283 | // CXXDefaultArgExpr is uninteresting |
| 284 | |
| 285 | // CXXBindTemporaryExpr is uninteresting |
| 286 | |
| 287 | // CXXConstructExpr is uninteresting |
| 288 | |
| 289 | // CXXFunctionalCastExpr |
| 290 | (void)Types(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 291 | |
| 292 | // CXXTemporaryObjectExpr |
| 293 | (void)X(values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 294 | |
| 295 | // CXXScalarValueInitExpr is uninteresting |
| 296 | |
| 297 | // CXXNewExpr |
| 298 | (void)new Types; // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 299 | (void)new X(values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 300 | (void)new (values) X(values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 301 | (void)new X [values]; // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 302 | |
| 303 | // CXXDeleteExpr |
| 304 | delete values; // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 305 | delete [] values; // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 306 | |
| 307 | // CXXPseudoDestructorExpr |
| 308 | T t; |
| 309 | values.~T(); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 310 | t.~Types(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 311 | t.Types::~T(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 312 | |
| 313 | // Unary TypeTraitExpr |
| 314 | __is_pod(Types); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 315 | |
| 316 | // Binary TypeTraitExpr |
| 317 | __is_base_of(Types, T); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 318 | __is_base_of(T, Types); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 319 | |
| 320 | // UnresolvedLookupExpr |
| 321 | test_unexpanded_exprs(values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 322 | test_unexpanded_exprs<Types>(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 323 | |
| 324 | // DependentScopeDeclRefExpr |
| 325 | Types::test_unexpanded_exprs(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 326 | T::template test_unexpanded_exprs<Types>(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 327 | |
| 328 | // CXXUnresolvedConstructExpr |
| 329 | Types(5); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 330 | |
| 331 | // CXXDependentScopeMemberExpr |
| 332 | values.foo(); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 333 | t.foo(values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 334 | |
| 335 | // FIXME: There's an evil ambiguity here, because we don't know if |
| 336 | // Types refers to the template type parameter pack in scope or a |
| 337 | // non-pack member. |
| 338 | // t.Types::foo(); |
| 339 | |
| 340 | t.template foo<Types>(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 341 | |
| 342 | // UnresolvedMemberExpr |
| 343 | x.f<Types>(); // expected-error{{expression contains unexpanded parameter pack 'Types'}} |
| 344 | x.f(values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 345 | |
| 346 | // CXXNoexceptExpr |
| 347 | noexcept(values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 348 | |
| 349 | // PackExpansionExpr is uninteresting |
| 350 | // SizeOfPackExpr is uninteresting |
| 351 | |
| 352 | // FIXME: Objective-C expressions will need to go elsewhere |
| 353 | |
| 354 | for (auto t : values) { } // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 355 | |
| 356 | switch (values) { } // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 357 | switch (0) { case 0: case values: ; } // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 358 | |
| 359 | do { } while (values); // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 360 | |
| 361 | test: |
| 362 | goto *values; // expected-error{{expression contains unexpanded parameter pack 'values'}} |
| 363 | |
| 364 | void f(int arg = values); // expected-error{{default argument contains unexpanded parameter pack 'values'}} |
| 365 | } |
| 366 | |
| 367 | // Test unexpanded parameter packs in partial specializations. |
| 368 | template<typename ...Types> |
| 369 | struct TestUnexpandedDecls<int, Types>; // expected-error{{partial specialization contains unexpanded parameter pack 'Types'}} |
| 370 | |
| 371 | // Test for diagnostics in the presence of multiple unexpanded |
| 372 | // parameter packs. |
| 373 | template<typename T, typename U> struct pair; |
| 374 | |
| 375 | template<typename ...OuterTypes> |
| 376 | struct MemberTemplatePPNames { |
| 377 | template<typename ...InnerTypes> |
| 378 | struct Inner { |
| 379 | typedef pair<OuterTypes, InnerTypes>* types; // expected-error{{declaration type contains unexpanded parameter packs 'OuterTypes' and 'InnerTypes'}} |
| 380 | |
| 381 | template<typename ...VeryInnerTypes> |
| 382 | struct VeryInner { |
| 383 | typedef pair<pair<VeryInnerTypes, OuterTypes>, pair<InnerTypes, OuterTypes> > types; // expected-error{{declaration type contains unexpanded parameter packs 'VeryInnerTypes', 'OuterTypes', ...}} |
| 384 | }; |
| 385 | }; |
| 386 | }; |
| 387 | |
| 388 | // Example from working paper |
| 389 | namespace WorkingPaperExample { |
| 390 | template<typename...> struct Tuple {}; |
| 391 | template<typename T1, typename T2> struct Pair {}; |
| 392 | |
| 393 | template<class ... Args1> struct zip { |
| 394 | template<class ... Args2> struct with { |
| 395 | typedef Tuple<Pair<Args1, Args2> ... > type; // expected-error{{pack expansion contains parameter packs 'Args1' and 'Args2' that have different lengths (1 vs. 2)}} |
| 396 | }; |
| 397 | }; |
| 398 | |
| 399 | typedef zip<short, int>::with<unsigned short, unsigned>::type T1; // T1 is Tuple<Pair<short, unsigned short>, Pair<int, unsigned>> |
| 400 | typedef Tuple<Pair<short, unsigned short>, Pair<int, unsigned>> T1; |
| 401 | |
| 402 | typedef zip<short>::with<unsigned short, unsigned>::type T2; // expected-note{{in instantiation of template class}} |
| 403 | |
| 404 | template<class ... Args> void f(Args...); |
| 405 | template<class ... Args> void h(Args...); |
| 406 | |
| 407 | template<class ... Args> |
| 408 | void g(Args ... args) { |
| 409 | f(const_cast<const Args*>(&args)...); // OK: "Args" and "args" are expanded within f |
| 410 | f(5 ...); // expected-error{{pack expansion does not contain any unexpanded parameter packs}} |
| 411 | f(args); // expected-error{{expression contains unexpanded parameter pack 'args'}} |
| 412 | f(h(args ...) + args ...); |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | namespace PR16303 { |
| 417 | template<int> struct A { A(int); }; |
| 418 | template<int...N> struct B { |
| 419 | template<int...M> struct C : A<N>... { |
| 420 | C() : A<N>(M)... {} // expected-error{{pack expansion contains parameter packs 'N' and 'M' that have different lengths (2 vs. 3)}} expected-error{{pack expansion contains parameter packs 'N' and 'M' that have different lengths (4 vs. 3)}} |
| 421 | }; |
| 422 | }; |
| 423 | B<1,2>::C<4,5,6> c1; // expected-note{{in instantiation of}} |
| 424 | B<1,2,3,4>::C<4,5,6> c2; // expected-note{{in instantiation of}} |
| 425 | } |
| 426 | |
| 427 | namespace PR21289 { |
| 428 | template<int> using T = int; |
| 429 | template<typename> struct S { static const int value = 0; }; |
| 430 | template<typename> const int vt = 0; // expected-warning {{extension}} |
| 431 | int f(...); |
| 432 | template<int ...Ns> void g() { |
| 433 | f(T<Ns>()...); |
| 434 | f(S<T<Ns>>::value...); |
| 435 | f(vt<T<Ns>>...); |
| 436 | } |
| 437 | template void g<>(); |
| 438 | template void g<1, 2, 3>(); |
| 439 | } |
| 440 | |
| 441 | template <class... Ts> |
| 442 | int var_expr(Ts... ts); |
| 443 | |
| 444 | template <class... Ts> |
| 445 | auto a_function(Ts... ts) -> decltype(var_expr(ts...)); |
| 446 | |
| 447 | template <class T> |
| 448 | using partial = decltype(a_function<int, T>); |
| 449 | |
| 450 | int use_partial() { partial<char> n; } |
| 451 | |
| 452 | namespace PR26017 { |
| 453 | template <class T> |
| 454 | struct Foo {}; |
| 455 | template <class... Ts> |
| 456 | using FooAlias = Foo<void(Ts...)>; |
| 457 | |
| 458 | template <class... Ts> |
| 459 | using FooAliasAlias = FooAlias<Ts..., Ts...>; |
| 460 | |
| 461 | template <class... Ts> |
| 462 | void bar(const FooAlias<Ts...> &) {} |
| 463 | |
| 464 | int fn() { |
| 465 | FooAlias<> a; |
| 466 | bar(a); |
| 467 | |
| 468 | FooAlias<int> b; |
| 469 | bar(b); |
| 470 | } |
| 471 | } |
| 472 | |