1// RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wc++98-compat -verify %s 2// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s 3 4namespace std { struct type_info; } 5 6template<typename ...T> // expected-warning {{variadic templates are incompatible with C++98}} 7class Variadic1 {}; 8 9template<template<typename> class ...T> // expected-warning {{variadic templates are incompatible with C++98}} 10class Variadic2 {}; 11 12template<int ...I> // expected-warning {{variadic templates are incompatible with C++98}} 13class Variadic3 {}; 14 15int alignas(8) with_alignas; // expected-warning {{'alignas' is incompatible with C++98}} 16int with_attribute [[ ]]; // expected-warning {{attributes are incompatible with C++98}} 17 18void Literals() { 19 (void)u8"str"; // expected-warning {{unicode literals are incompatible with C++98}} 20 (void)u"str"; // expected-warning {{unicode literals are incompatible with C++98}} 21 (void)U"str"; // expected-warning {{unicode literals are incompatible with C++98}} 22 (void)u'x'; // expected-warning {{unicode literals are incompatible with C++98}} 23 (void)U'x'; // expected-warning {{unicode literals are incompatible with C++98}} 24 25 (void)u8R"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}} 26 (void)uR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}} 27 (void)UR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}} 28 (void)R"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}} 29 (void)LR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}} 30} 31 32template<typename T> struct S {}; 33namespace TemplateParsing { 34 S<::S<void> > s; // expected-warning {{'<::' is treated as digraph '<:' (aka '[') followed by ':' in C++98}} 35 S< ::S<void>> t; // expected-warning {{consecutive right angle brackets are incompatible with C++98 (use '> >')}} 36} 37 38void Lambda() { 39 []{}(); // expected-warning {{lambda expressions are incompatible with C++98}} 40} 41 42int InitList(int i = {}) { // expected-warning {{generalized initializer lists are incompatible with C++98}} \ 43 // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}} 44 (void)new int {}; // expected-warning {{generalized initializer lists are incompatible with C++98}} \ 45 // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}} 46 (void)int{}; // expected-warning {{generalized initializer lists are incompatible with C++98}} \ 47 // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}} 48 int x { 0 }; // expected-warning {{generalized initializer lists are incompatible with C++98}} 49 S<int> s = {}; // ok, aggregate 50 s = {}; // expected-warning {{generalized initializer lists are incompatible with C++98}} 51 return { 0 }; // expected-warning {{generalized initializer lists are incompatible with C++98}} 52} 53struct DelayedDefaultArgumentParseInitList { 54 void f(int i = {1}) { // expected-warning {{generalized initializer lists are incompatible with C++98}} 55 } 56}; 57 58int operator"" _hello(const char *); // expected-warning {{literal operators are incompatible with C++98}} 59 60enum EnumFixed : int { // expected-warning {{enumeration types with a fixed underlying type are incompatible with C++98}} 61}; 62 63enum class EnumScoped { // expected-warning {{scoped enumerations are incompatible with C++98}} 64}; 65 66void Deleted() = delete; // expected-warning {{deleted function definitions are incompatible with C++98}} 67struct Defaulted { 68 Defaulted() = default; // expected-warning {{defaulted function definitions are incompatible with C++98}} 69}; 70 71int &&RvalueReference = 0; // expected-warning {{rvalue references are incompatible with C++98}} 72struct RefQualifier { 73 void f() &; // expected-warning {{reference qualifiers on functions are incompatible with C++98}} 74}; 75 76auto f() -> int; // expected-warning {{trailing return types are incompatible with C++98}} 77 78void RangeFor() { 79 int xs[] = {1, 2, 3}; 80 for (int &a : xs) { // expected-warning {{range-based for loop is incompatible with C++98}} 81 } 82} 83 84struct InClassInit { 85 int n = 0; // expected-warning {{in-class initialization of non-static data members is incompatible with C++98}} 86}; 87 88struct OverrideControlBase { 89 virtual void f(); 90 virtual void g(); 91}; 92struct OverrideControl final : OverrideControlBase { // expected-warning {{'final' keyword is incompatible with C++98}} 93 virtual void f() override; // expected-warning {{'override' keyword is incompatible with C++98}} 94 virtual void g() final; // expected-warning {{'final' keyword is incompatible with C++98}} 95}; 96 97using AliasDecl = int; // expected-warning {{alias declarations are incompatible with C++98}} 98template<typename T> using AliasTemplate = T; // expected-warning {{alias declarations are incompatible with C++98}} 99 100inline namespace InlineNS { // expected-warning {{inline namespaces are incompatible with C++98}} 101} 102 103auto auto_deduction = 0; // expected-warning {{'auto' type specifier is incompatible with C++98}} 104int *p = new auto(0); // expected-warning {{'auto' type specifier is incompatible with C++98}} 105 106const int align_of = alignof(int); // expected-warning {{alignof expressions are incompatible with C++98}} 107char16_t c16 = 0; // expected-warning {{'char16_t' type specifier is incompatible with C++98}} 108char32_t c32 = 0; // expected-warning {{'char32_t' type specifier is incompatible with C++98}} 109constexpr int const_expr = 0; // expected-warning {{'constexpr' specifier is incompatible with C++98}} 110decltype(const_expr) decl_type = 0; // expected-warning {{'decltype' type specifier is incompatible with C++98}} 111__decltype(const_expr) decl_type2 = 0; // ok 112void no_except() noexcept; // expected-warning {{noexcept specifications are incompatible with C++98}} 113bool no_except_expr = noexcept(1 + 1); // expected-warning {{noexcept expressions are incompatible with C++98}} 114void *null = nullptr; // expected-warning {{'nullptr' is incompatible with C++98}} 115static_assert(true, "!"); // expected-warning {{static_assert declarations are incompatible with C++98}} 116 117struct InhCtorBase { 118 InhCtorBase(int); 119}; 120struct InhCtorDerived : InhCtorBase { 121 using InhCtorBase::InhCtorBase; // expected-warning {{inherited constructors are incompatible with C++98}} 122}; 123 124struct FriendMember { 125 static void MemberFn(); 126 friend void FriendMember::MemberFn(); // expected-warning {{friend declaration naming a member of the declaring class is incompatible with C++98}} 127}; 128 129struct DelegCtor { 130 DelegCtor(int) : DelegCtor() {} // expected-warning {{delegating constructors are incompatible with C++98}} 131 DelegCtor(); 132}; 133 134template<int n = 0> void DefaultFuncTemplateArg(); // expected-warning {{default template arguments for a function template are incompatible with C++98}} 135 136template<typename T> int TemplateFn(T) { return 0; } 137void LocalTemplateArg() { 138 struct S {}; 139 TemplateFn(S()); // expected-warning {{local type 'S' as template argument is incompatible with C++98}} 140} 141struct {} obj_of_unnamed_type; // expected-note {{here}} 142int UnnamedTemplateArg = TemplateFn(obj_of_unnamed_type); // expected-warning {{unnamed type as template argument is incompatible with C++98}} 143 144namespace RedundantParensInAddressTemplateParam { 145 int n; 146 template<int*p> struct S {}; 147 S<(&n)> s; // expected-warning {{redundant parentheses surrounding address non-type template argument are incompatible with C++98}} 148 S<(((&n)))> t; // expected-warning {{redundant parentheses surrounding address non-type template argument are incompatible with C++98}} 149} 150 151namespace TemplateSpecOutOfScopeNs { 152 template<typename T> struct S {}; // expected-note {{here}} 153} 154template<> struct TemplateSpecOutOfScopeNs::S<char> {}; // expected-warning {{class template specialization of 'S' outside namespace 'TemplateSpecOutOfScopeNs' is incompatible with C++98}} 155 156struct Typename { 157 template<typename T> struct Inner {}; 158}; 159typename ::Typename TypenameOutsideTemplate(); // expected-warning {{use of 'typename' outside of a template is incompatible with C++98}} 160Typename::template Inner<int> TemplateOutsideTemplate(); // expected-warning {{use of 'template' keyword outside of a template is incompatible with C++98}} 161 162struct TrivialButNonPOD { 163 int f(int); 164private: 165 int k; 166}; 167void Ellipsis(int n, ...); 168void TrivialButNonPODThroughEllipsis() { 169 Ellipsis(1, TrivialButNonPOD()); // expected-warning {{passing object of trivial but non-POD type 'TrivialButNonPOD' through variadic function is incompatible with C++98}} 170} 171 172struct HasExplicitConversion { 173 explicit operator bool(); // expected-warning {{explicit conversion functions are incompatible with C++98}} 174}; 175 176struct Struct {}; 177enum Enum { enum_val = 0 }; 178struct BadFriends { 179 friend enum ::Enum; // expected-warning {{befriending enumeration type 'enum ::Enum' is incompatible with C++98}} 180 friend int; // expected-warning {{non-class friend type 'int' is incompatible with C++98}} 181 friend Struct; // expected-warning {{befriending 'Struct' without 'struct' keyword is incompatible with C++98}} 182}; 183 184int n = {}; // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}} 185 186class PrivateMember { 187 struct ImPrivate {}; 188}; 189template<typename T> typename T::ImPrivate SFINAEAccessControl(T t) { // expected-warning {{substitution failure due to access control is incompatible with C++98}} expected-note {{while substituting deduced template arguments into function template 'SFINAEAccessControl' [with T = PrivateMember]}} 190 return typename T::ImPrivate(); 191} 192int SFINAEAccessControl(...) { return 0; } 193int CheckSFINAEAccessControl = SFINAEAccessControl(PrivateMember()); 194 195template<typename T> 196struct FriendRedefinition { 197 friend void Friend() {} // expected-warning {{friend function 'Friend' would be implicitly redefined in C++98}} expected-note {{previous}} 198}; 199FriendRedefinition<int> FriendRedef1; 200FriendRedefinition<char> FriendRedef2; // expected-note {{requested here}} 201 202namespace CopyCtorIssues { 203 struct Private { 204 Private(); 205 private: 206 Private(const Private&); // expected-note {{declared private here}} 207 }; 208 struct NoViable { 209 NoViable(); 210 NoViable(NoViable&); // expected-note {{not viable}} 211 }; 212 struct Ambiguous { 213 Ambiguous(); 214 Ambiguous(const Ambiguous &, int = 0); // expected-note {{candidate}} 215 Ambiguous(const Ambiguous &, double = 0); // expected-note {{candidate}} 216 }; 217 struct Deleted { 218 Private p; // expected-note {{implicitly deleted}} 219 }; 220 221 const Private &a = Private(); // expected-warning {{copying variable of type 'CopyCtorIssues::Private' when binding a reference to a temporary would invoke an inaccessible constructor in C++98}} 222 const NoViable &b = NoViable(); // expected-warning {{copying variable of type 'CopyCtorIssues::NoViable' when binding a reference to a temporary would find no viable constructor in C++98}} 223 const Ambiguous &c = Ambiguous(); // expected-warning {{copying variable of type 'CopyCtorIssues::Ambiguous' when binding a reference to a temporary would find ambiguous constructors in C++98}} 224 const Deleted &d = Deleted(); // expected-warning {{copying variable of type 'CopyCtorIssues::Deleted' when binding a reference to a temporary would invoke a deleted constructor in C++98}} 225} 226 227namespace UnionOrAnonStructMembers { 228 struct NonTrivCtor { 229 NonTrivCtor(); // expected-note 2{{user-declared constructor}} 230 }; 231 struct NonTrivCopy { 232 NonTrivCopy(const NonTrivCopy&); // expected-note 2{{user-declared copy constructor}} 233 }; 234 struct NonTrivDtor { 235 ~NonTrivDtor(); // expected-note 2{{user-declared destructor}} 236 }; 237 union BadUnion { 238 NonTrivCtor ntc; // expected-warning {{union member 'ntc' with a non-trivial constructor is incompatible with C++98}} 239 NonTrivCopy ntcp; // expected-warning {{union member 'ntcp' with a non-trivial copy constructor is incompatible with C++98}} 240 NonTrivDtor ntd; // expected-warning {{union member 'ntd' with a non-trivial destructor is incompatible with C++98}} 241 }; 242 struct Wrap { 243 struct { 244 NonTrivCtor ntc; // expected-warning {{anonymous struct member 'ntc' with a non-trivial constructor is incompatible with C++98}} 245 NonTrivCopy ntcp; // expected-warning {{anonymous struct member 'ntcp' with a non-trivial copy constructor is incompatible with C++98}} 246 NonTrivDtor ntd; // expected-warning {{anonymous struct member 'ntd' with a non-trivial destructor is incompatible with C++98}} 247 }; 248 }; 249 union WithStaticDataMember { 250 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}} 251 static const int n = 0; // expected-warning {{static data member 'n' in union is incompatible with C++98}} 252 static int k; // expected-warning {{static data member 'k' in union is incompatible with C++98}} 253 }; 254} 255 256int EnumNNS = Enum::enum_val; // expected-warning {{enumeration type in nested name specifier is incompatible with C++98}} 257template<typename T> void EnumNNSFn() { 258 int k = T::enum_val; // expected-warning {{enumeration type in nested name specifier is incompatible with C++98}} 259}; 260template void EnumNNSFn<Enum>(); // expected-note {{in instantiation}} 261 262void JumpDiagnostics(int n) { 263 goto DirectJump; // expected-warning {{goto would jump into protected scope in C++98}} 264 TrivialButNonPOD tnp1; // expected-note {{jump bypasses initialization of non-POD variable}} 265 266DirectJump: 267 void *Table[] = {&&DirectJump, &&Later}; 268 goto *Table[n]; // expected-warning {{indirect goto might cross protected scopes in C++98}} 269 270 TrivialButNonPOD tnp2; // expected-note {{jump bypasses initialization of non-POD variable}} 271Later: // expected-note {{possible target of indirect goto}} 272 switch (n) { 273 TrivialButNonPOD tnp3; // expected-note {{jump bypasses initialization of non-POD variable}} 274 default: // expected-warning {{switch case would be in a protected scope in C++98}} 275 return; 276 } 277} 278 279namespace UnevaluatedMemberAccess { 280 struct S { 281 int n; 282 int f() { return sizeof(S::n); } // ok 283 }; 284 int k = sizeof(S::n); // expected-warning {{use of non-static data member 'n' in an unevaluated context is incompatible with C++98}} 285 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}} 286} 287 288namespace LiteralUCNs { 289 char c1 = '\u001e'; // expected-warning {{universal character name referring to a control character is incompatible with C++98}} 290 wchar_t c2 = L'\u0041'; // expected-warning {{specifying character 'A' with a universal character name is incompatible with C++98}} 291 const char *s1 = "foo\u0031"; // expected-warning {{specifying character '1' with a universal character name is incompatible with C++98}} 292 const wchar_t *s2 = L"bar\u0085"; // expected-warning {{universal character name referring to a control character is incompatible with C++98}} 293} 294 295namespace NonTypeTemplateArgs { 296 template<typename T, T v> struct S {}; 297 const int k = 5; // expected-note {{here}} 298 static void f() {} // expected-note {{here}} 299 S<const int&, k> s1; // expected-warning {{non-type template argument referring to object 'k' with internal linkage is incompatible with C++98}} 300 S<void(&)(), f> s2; // expected-warning {{non-type template argument referring to function 'f' with internal linkage is incompatible with C++98}} 301} 302