1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wc++98-compat -verify %s 2 // RUN: %clang_cc1 -fsyntax-only -std=c++14 -Wc++98-compat -verify %s -DCXX14COMPAT 3 4 namespace std { 5 struct type_info; 6 using size_t = decltype(sizeof(0)); // expected-warning {{decltype}} expected-warning {{alias}} 7 template<typename T> struct initializer_list { 8 initializer_list(T*, size_t); 9 T *p; 10 size_t n; 11 T *begin(); 12 T *end(); 13 }; 14 } 15 16 template<typename ...T> // expected-warning {{variadic templates are incompatible with C++98}} 17 class Variadic1 {}; 18 19 template<template<typename> class ...T> // expected-warning {{variadic templates are incompatible with C++98}} 20 class Variadic2 {}; 21 22 template<int ...I> // expected-warning {{variadic templates are incompatible with C++98}} 23 class Variadic3 {}; 24 25 alignas(8) int with_alignas; // expected-warning {{'alignas' is incompatible with C++98}} 26 int with_attribute [[ ]]; // expected-warning {{C++11 attribute syntax is incompatible with C++98}} 27 28 void Literals() { 29 (void)u8"str"; // expected-warning {{unicode literals are incompatible with C++98}} 30 (void)u"str"; // expected-warning {{unicode literals are incompatible with C++98}} 31 (void)U"str"; // expected-warning {{unicode literals are incompatible with C++98}} 32 (void)u'x'; // expected-warning {{unicode literals are incompatible with C++98}} 33 (void)U'x'; // expected-warning {{unicode literals are incompatible with C++98}} 34 35 (void)u8R"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}} 36 (void)uR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}} 37 (void)UR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}} 38 (void)R"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}} 39 (void)LR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}} 40 } 41 42 template<typename T> struct S {}; 43 namespace TemplateParsing { 44 S<::S<void> > s; // expected-warning {{'<::' is treated as digraph '<:' (aka '[') followed by ':' in C++98}} 45 S< ::S<void>> t; // expected-warning {{consecutive right angle brackets are incompatible with C++98 (use '> >')}} 46 } 47 48 void Lambda() { 49 []{}(); // expected-warning {{lambda expressions are incompatible with C++98}} 50 } 51 52 struct Ctor { 53 Ctor(int, char); 54 Ctor(double, long); 55 }; 56 struct InitListCtor { 57 InitListCtor(std::initializer_list<bool>); 58 }; 59 60 int InitList(int i = {}) { // expected-warning {{generalized initializer lists are incompatible with C++98}} \ 61 // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}} 62 (void)new int {}; // expected-warning {{generalized initializer lists are incompatible with C++98}} \ 63 // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}} 64 (void)int{}; // expected-warning {{generalized initializer lists are incompatible with C++98}} \ 65 // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}} 66 int x { 0 }; // expected-warning {{generalized initializer lists are incompatible with C++98}} 67 S<int> s = {}; // ok, aggregate 68 s = {}; // expected-warning {{generalized initializer lists are incompatible with C++98}} 69 std::initializer_list<int> xs = { 1, 2, 3 }; // expected-warning {{initialization of initializer_list object is incompatible with C++98}} 70 auto ys = { 1, 2, 3 }; // expected-warning {{initialization of initializer_list object is incompatible with C++98}} \ 71 // expected-warning {{'auto' type specifier is incompatible with C++98}} 72 Ctor c1 = { 1, 2 }; // expected-warning {{constructor call from initializer list is incompatible with C++98}} 73 Ctor c2 = { 3.0, 4l }; // expected-warning {{constructor call from initializer list is incompatible with C++98}} 74 InitListCtor ilc = { true, false }; // expected-warning {{initialization of initializer_list object is incompatible with C++98}} 75 const int &r = { 0 }; // expected-warning {{reference initialized from initializer list is incompatible with C++98}} 76 struct { int a; const int &r; } rr = { 0, {0} }; // expected-warning {{reference initialized from initializer list is incompatible with C++98}} 77 return { 0 }; // expected-warning {{generalized initializer lists are incompatible with C++98}} expected-warning {{scalar}} 78 } 79 struct DelayedDefaultArgumentParseInitList { 80 void f(int i = {1}) { // expected-warning {{generalized initializer lists are incompatible with C++98}} expected-warning {{scalar}} 81 } 82 }; 83 84 int operator"" _hello(const char *); // expected-warning {{literal operators are incompatible with C++98}} 85 86 enum EnumFixed : int { // expected-warning {{enumeration types with a fixed underlying type are incompatible with C++98}} 87 }; 88 89 enum class EnumScoped { // expected-warning {{scoped enumerations are incompatible with C++98}} 90 }; 91 92 void Deleted() = delete; // expected-warning {{deleted function definitions are incompatible with C++98}} 93 struct Defaulted { 94 Defaulted() = default; // expected-warning {{defaulted function definitions are incompatible with C++98}} 95 }; 96 97 int &&RvalueReference = 0; // expected-warning {{rvalue references are incompatible with C++98}} 98 struct RefQualifier { 99 void f() &; // expected-warning {{reference qualifiers on functions are incompatible with C++98}} 100 }; 101 102 auto f() -> int; // expected-warning {{trailing return types are incompatible with C++98}} 103 104 void RangeFor() { 105 int xs[] = {1, 2, 3}; 106 for (int &a : xs) { // expected-warning {{range-based for loop is incompatible with C++98}} 107 } 108 for (auto &b : {1, 2, 3}) { 109 // expected-warning@-1 {{range-based for loop is incompatible with C++98}} 110 // expected-warning@-2 {{'auto' type specifier is incompatible with C++98}} 111 // expected-warning@-3 {{initialization of initializer_list object is incompatible with C++98}} 112 // expected-warning@-4 {{reference initialized from initializer list is incompatible with C++98}} 113 } 114 struct Agg { int a, b; } const &agg = { 1, 2 }; // expected-warning {{reference initialized from initializer list is incompatible with C++98}} 115 } 116 117 struct InClassInit { 118 int n = 0; // expected-warning {{in-class initialization of non-static data members is incompatible with C++98}} 119 }; 120 121 struct OverrideControlBase { 122 virtual void f(); 123 virtual void g(); 124 }; 125 struct OverrideControl final : OverrideControlBase { // expected-warning {{'final' keyword is incompatible with C++98}} 126 virtual void f() override; // expected-warning {{'override' keyword is incompatible with C++98}} 127 virtual void g() final; // expected-warning {{'final' keyword is incompatible with C++98}} 128 }; 129 130 using AliasDecl = int; // expected-warning {{alias declarations are incompatible with C++98}} 131 template<typename T> using AliasTemplate = T; // expected-warning {{alias declarations are incompatible with C++98}} 132 133 inline namespace InlineNS { // expected-warning {{inline namespaces are incompatible with C++98}} 134 } 135 136 auto auto_deduction = 0; // expected-warning {{'auto' type specifier is incompatible with C++98}} 137 int *p = new auto(0); // expected-warning {{'auto' type specifier is incompatible with C++98}} 138 139 const int align_of = alignof(int); // expected-warning {{alignof expressions are incompatible with C++98}} 140 char16_t c16 = 0; // expected-warning {{'char16_t' type specifier is incompatible with C++98}} 141 char32_t c32 = 0; // expected-warning {{'char32_t' type specifier is incompatible with C++98}} 142 constexpr int const_expr = 0; // expected-warning {{'constexpr' specifier is incompatible with C++98}} 143 decltype(const_expr) decl_type = 0; // expected-warning {{'decltype' type specifier is incompatible with C++98}} 144 __decltype(const_expr) decl_type2 = 0; // ok 145 void no_except() noexcept; // expected-warning {{noexcept specifications are incompatible with C++98}} 146 bool no_except_expr = noexcept(1 + 1); // expected-warning {{noexcept expressions are incompatible with C++98}} 147 void *null = nullptr; // expected-warning {{'nullptr' is incompatible with C++98}} 148 static_assert(true, "!"); // expected-warning {{static_assert declarations are incompatible with C++98}} 149 150 struct InhCtorBase { 151 InhCtorBase(int); 152 }; 153 struct InhCtorDerived : InhCtorBase { 154 using InhCtorBase::InhCtorBase; // expected-warning {{inheriting constructors are incompatible with C++98}} 155 }; 156 157 struct FriendMember { 158 static void MemberFn(); 159 friend void FriendMember::MemberFn(); // expected-warning {{friend declaration naming a member of the declaring class is incompatible with C++98}} 160 }; 161 162 struct DelegCtor { 163 DelegCtor(int) : DelegCtor() {} // expected-warning {{delegating constructors are incompatible with C++98}} 164 DelegCtor(); 165 }; 166 167 template<int n = 0> void DefaultFuncTemplateArg(); // expected-warning {{default template arguments for a function template are incompatible with C++98}} 168 169 template<typename T> int TemplateFn(T) { return 0; } 170 void LocalTemplateArg() { 171 struct S {}; 172 TemplateFn(S()); // expected-warning {{local type 'S' as template argument is incompatible with C++98}} 173 } 174 struct {} obj_of_unnamed_type; // expected-note {{here}} 175 int UnnamedTemplateArg = TemplateFn(obj_of_unnamed_type); // expected-warning {{unnamed type as template argument is incompatible with C++98}} 176 177 namespace RedundantParensInAddressTemplateParam { 178 int n; 179 template<int*p> struct S {}; 180 S<(&n)> s; // expected-warning {{redundant parentheses surrounding address non-type template argument are incompatible with C++98}} 181 S<(((&n)))> t; // expected-warning {{redundant parentheses surrounding address non-type template argument are incompatible with C++98}} 182 } 183 184 namespace TemplateSpecOutOfScopeNs { 185 template<typename T> struct S {}; // expected-note {{here}} 186 } 187 template<> struct TemplateSpecOutOfScopeNs::S<char> {}; // expected-warning {{class template specialization of 'S' outside namespace 'TemplateSpecOutOfScopeNs' is incompatible with C++98}} 188 189 struct Typename { 190 template<typename T> struct Inner {}; 191 }; 192 typename ::Typename TypenameOutsideTemplate(); // expected-warning {{use of 'typename' outside of a template is incompatible with C++98}} 193 Typename::template Inner<int> TemplateOutsideTemplate(); // expected-warning {{use of 'template' keyword outside of a template is incompatible with C++98}} 194 195 struct TrivialButNonPOD { 196 int f(int); 197 private: 198 int k; 199 }; 200 void Ellipsis(int n, ...); 201 void TrivialButNonPODThroughEllipsis() { 202 Ellipsis(1, TrivialButNonPOD()); // expected-warning {{passing object of trivial but non-POD type 'TrivialButNonPOD' through variadic function is incompatible with C++98}} 203 } 204 205 struct HasExplicitConversion { 206 explicit operator bool(); // expected-warning {{explicit conversion functions are incompatible with C++98}} 207 }; 208 209 struct Struct {}; 210 enum Enum { enum_val = 0 }; 211 struct BadFriends { 212 friend enum ::Enum; // expected-warning {{befriending enumeration type 'enum ::Enum' is incompatible with C++98}} 213 friend int; // expected-warning {{non-class friend type 'int' is incompatible with C++98}} 214 friend Struct; // expected-warning {{befriending 'Struct' without 'struct' keyword is incompatible with C++98}} 215 }; 216 217 int n = {}; // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}} 218 219 class PrivateMember { 220 struct ImPrivate {}; 221 }; 222 template<typename T> typename T::ImPrivate SFINAEAccessControl(T t) { // expected-warning {{substitution failure due to access control is incompatible with C++98}} 223 return typename T::ImPrivate(); 224 } 225 int SFINAEAccessControl(...) { return 0; } 226 int CheckSFINAEAccessControl = SFINAEAccessControl(PrivateMember()); // expected-note {{while substituting deduced template arguments into function template 'SFINAEAccessControl' [with T = PrivateMember]}} 227 228 namespace UnionOrAnonStructMembers { 229 struct NonTrivCtor { 230 NonTrivCtor(); // expected-note 2{{user-provided default constructor}} 231 }; 232 struct NonTrivCopy { 233 NonTrivCopy(const NonTrivCopy&); // expected-note 2{{user-provided copy constructor}} 234 }; 235 struct NonTrivDtor { 236 ~NonTrivDtor(); // expected-note 2{{user-provided destructor}} 237 }; 238 union BadUnion { 239 NonTrivCtor ntc; // expected-warning {{union member 'ntc' with a non-trivial constructor is incompatible with C++98}} 240 NonTrivCopy ntcp; // expected-warning {{union member 'ntcp' with a non-trivial copy constructor is incompatible with C++98}} 241 NonTrivDtor ntd; // expected-warning {{union member 'ntd' with a non-trivial destructor is incompatible with C++98}} 242 }; 243 struct Wrap { 244 struct { 245 NonTrivCtor ntc; // expected-warning {{anonymous struct member 'ntc' with a non-trivial constructor is incompatible with C++98}} 246 NonTrivCopy ntcp; // expected-warning {{anonymous struct member 'ntcp' with a non-trivial copy constructor is incompatible with C++98}} 247 NonTrivDtor ntd; // expected-warning {{anonymous struct member 'ntd' with a non-trivial destructor is incompatible with C++98}} 248 }; 249 }; 250 union WithStaticDataMember { 251 static constexpr double d = 0.0; // expected-warning {{static data member 'd' in union is incompatible with C++98}} expected-warning {{'constexpr' specifier is incompatible with C++98}} 252 static const int n = 0; // expected-warning {{static data member 'n' in union is incompatible with C++98}} 253 static int k; // expected-warning {{static data member 'k' in union is incompatible with C++98}} 254 }; 255 } 256 257 int EnumNNS = Enum::enum_val; // expected-warning {{enumeration type in nested name specifier is incompatible with C++98}} 258 template<typename T> void EnumNNSFn() { 259 int k = T::enum_val; // expected-warning {{enumeration type in nested name specifier is incompatible with C++98}} 260 }; 261 template void EnumNNSFn<Enum>(); // expected-note {{in instantiation}} 262 263 void JumpDiagnostics(int n) { 264 goto DirectJump; // expected-warning {{jump from this goto statement to its label is incompatible with C++98}} 265 TrivialButNonPOD tnp1; // expected-note {{jump bypasses initialization of non-POD variable}} 266 267 DirectJump: 268 void *Table[] = {&&DirectJump, &&Later}; 269 goto *Table[n]; // expected-warning {{jump from this indirect goto statement to one of its possible targets is incompatible with C++98}} 270 271 TrivialButNonPOD tnp2; // expected-note {{jump bypasses initialization of non-POD variable}} 272 Later: // expected-note {{possible target of indirect goto statement}} 273 switch (n) { 274 TrivialButNonPOD tnp3; // expected-note {{jump bypasses initialization of non-POD variable}} 275 default: // expected-warning {{jump from switch statement to this case label is incompatible with C++98}} 276 return; 277 } 278 } 279 280 namespace UnevaluatedMemberAccess { 281 struct S { 282 int n; 283 int f() { return sizeof(S::n); } // ok 284 }; 285 int k = sizeof(S::n); // expected-warning {{use of non-static data member 'n' in an unevaluated context is incompatible with C++98}} 286 const std::type_info &ti = typeid(S::n); // expected-warning {{use of non-static data member 'n' in an unevaluated context is incompatible with C++98}} 287 } 288 289 namespace LiteralUCNs { 290 char c1 = '\u001e'; // expected-warning {{universal character name referring to a control character is incompatible with C++98}} 291 wchar_t c2 = L'\u0041'; // expected-warning {{specifying character 'A' with a universal character name is incompatible with C++98}} 292 const char *s1 = "foo\u0031"; // expected-warning {{specifying character '1' with a universal character name is incompatible with C++98}} 293 const wchar_t *s2 = L"bar\u0085"; // expected-warning {{universal character name referring to a control character is incompatible with C++98}} 294 } 295 296 namespace NonTypeTemplateArgs { 297 template<typename T, T v> struct S {}; 298 const int k = 5; // expected-note {{here}} 299 static void f() {} // expected-note {{here}} 300 S<const int&, k> s1; // expected-warning {{non-type template argument referring to object 'k' with internal linkage is incompatible with C++98}} 301 S<void(&)(), f> s2; // expected-warning {{non-type template argument referring to function 'f' with internal linkage is incompatible with C++98}} 302 } 303 304 namespace NullPointerTemplateArg { 305 struct A {}; 306 template<int*> struct X {}; 307 template<int A::*> struct Y {}; 308 X<(int*)0> x; // expected-warning {{use of null pointer as non-type template argument is incompatible with C++98}} 309 Y<(int A::*)0> y; // expected-warning {{use of null pointer as non-type template argument is incompatible with C++98}} 310 } 311 312 namespace PR13480 { 313 struct basic_iterator { 314 basic_iterator(const basic_iterator &it) {} // expected-note {{because type 'PR13480::basic_iterator' has a user-provided copy constructor}} 315 basic_iterator(basic_iterator &it) {} 316 }; 317 318 union test { 319 basic_iterator it; // expected-warning {{union member 'it' with a non-trivial copy constructor is incompatible with C++98}} 320 }; 321 } 322 323 namespace AssignOpUnion { 324 struct a { 325 void operator=(const a &it) {} // expected-note {{because type 'AssignOpUnion::a' has a user-provided copy assignment operator}} 326 void operator=(a &it) {} 327 }; 328 329 struct b { 330 void operator=(const b &it) {} // expected-note {{because type 'AssignOpUnion::b' has a user-provided copy assignment operator}} 331 }; 332 333 union test1 { 334 a x; // expected-warning {{union member 'x' with a non-trivial copy assignment operator is incompatible with C++98}} 335 b y; // expected-warning {{union member 'y' with a non-trivial copy assignment operator is incompatible with C++98}} 336 }; 337 } 338 339 namespace rdar11736429 { 340 struct X { // expected-note {{because type 'rdar11736429::X' has no default constructor}} 341 X(const X&) = delete; // expected-warning{{deleted function definitions are incompatible with C++98}} \ 342 // expected-note {{implicit default constructor suppressed by user-declared constructor}} 343 }; 344 345 union S { 346 X x; // expected-warning{{union member 'x' with a non-trivial constructor is incompatible with C++98}} 347 }; 348 } 349 350 template<typename T> T var = T(10); 351 #ifdef CXX14COMPAT 352 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}} 353 #else 354 // expected-warning@-4 {{variable templates are a C++14 extension}} 355 #endif 356 357 // No diagnostic for specializations of variable templates; we will have 358 // diagnosed the primary template. 359 template<typename T> T* var<T*> = new T(); 360 template<> int var<int> = 10; 361 template int var<int>; 362 float fvar = var<float>; 363 364 class A { 365 template<typename T> static T var = T(10); 366 #ifdef CXX14COMPAT 367 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}} 368 #else 369 // expected-warning@-4 {{variable templates are a C++14 extension}} 370 #endif 371 372 template<typename T> static T* var<T*> = new T(); 373 }; 374 375 struct B { template<typename T> static T v; }; 376 #ifdef CXX14COMPAT 377 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}} 378 #else 379 // expected-warning@-4 {{variable templates are a C++14 extension}} 380 #endif 381 382 template<typename T> T B::v = T(); 383 #ifdef CXX14COMPAT 384 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}} 385 #else 386 // expected-warning@-4 {{variable templates are a C++14 extension}} 387 #endif 388 389 template<typename T> T* B::v<T*> = new T(); 390 template<> int B::v<int> = 10; 391 template int B::v<int>; 392 float fsvar = B::v<float>; 393 394 #ifdef CXX14COMPAT 395 int digit_seps = 123'456; // expected-warning {{digit separators are incompatible with C++ standards before C++14}} 396 #endif 397
