1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wc++98-compat -verify %s
2 // RUN: %clang_cc1 -fsyntax-only -std=c++1y -Wc++98-compat -verify %s -DCXX1YCOMPAT
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);
16 template<typename ...T> // expected-warning {{variadic templates are incompatible with C++98}}
19 template<template<typename> class ...T> // expected-warning {{variadic templates are incompatible with C++98}}
22 template<int ...I> // expected-warning {{variadic templates are incompatible with C++98}}
25 alignas(8) int with_alignas; // expected-warning {{'alignas' is incompatible with C++98}}
26 int with_attribute [[ ]]; // expected-warning {{attributes are incompatible with C++98}}
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}}
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}}
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 '> >')}}
49 []{}(); // expected-warning {{lambda expressions are incompatible with C++98}}
57 InitListCtor(std::initializer_list<bool>);
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}}
79 struct DelayedDefaultArgumentParseInitList {
80 void f(int i = {1}) { // expected-warning {{generalized initializer lists are incompatible with C++98}}
84 int operator"" _hello(const char *); // expected-warning {{literal operators are incompatible with C++98}}
86 enum EnumFixed : int { // expected-warning {{enumeration types with a fixed underlying type are incompatible with C++98}}
89 enum class EnumScoped { // expected-warning {{scoped enumerations are incompatible with C++98}}
92 void Deleted() = delete; // expected-warning {{deleted function definitions are incompatible with C++98}}
94 Defaulted() = default; // expected-warning {{defaulted function definitions are incompatible with C++98}}
97 int &&RvalueReference = 0; // expected-warning {{rvalue references are incompatible with C++98}}
99 void f() &; // expected-warning {{reference qualifiers on functions are incompatible with C++98}}
102 auto f() -> int; // expected-warning {{trailing return types are incompatible with C++98}}
105 int xs[] = {1, 2, 3};
106 for (int &a : xs) { // expected-warning {{range-based for loop is incompatible with C++98}}
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}}
114 struct Agg { int a, b; } const &agg = { 1, 2 }; // expected-warning {{reference initialized from initializer list is incompatible with C++98}}
118 int n = 0; // expected-warning {{in-class initialization of non-static data members is incompatible with C++98}}
121 struct OverrideControlBase {
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}}
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}}
133 inline namespace InlineNS { // expected-warning {{inline namespaces are incompatible with C++98}}
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}}
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}}
153 struct InhCtorDerived : InhCtorBase {
154 using InhCtorBase::InhCtorBase; // expected-warning {{inheriting constructors are incompatible with C++98}}
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}}
163 DelegCtor(int) : DelegCtor() {} // expected-warning {{delegating constructors are incompatible with C++98}}
167 template<int n = 0> void DefaultFuncTemplateArg(); // expected-warning {{default template arguments for a function template are incompatible with C++98}}
169 template<typename T> int TemplateFn(T) { return 0; }
170 void LocalTemplateArg() {
172 TemplateFn(S()); // expected-warning {{local type 'S' as template argument is incompatible with C++98}}
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}}
177 namespace RedundantParensInAddressTemplateParam {
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}}
184 namespace TemplateSpecOutOfScopeNs {
185 template<typename T> struct S {}; // expected-note {{here}}
187 template<> struct TemplateSpecOutOfScopeNs::S<char> {}; // expected-warning {{class template specialization of 'S' outside namespace 'TemplateSpecOutOfScopeNs' is incompatible with C++98}}
190 template<typename T> struct Inner {};
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}}
195 struct TrivialButNonPOD {
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}}
205 struct HasExplicitConversion {
206 explicit operator bool(); // expected-warning {{explicit conversion functions are incompatible with C++98}}
210 enum Enum { enum_val = 0 };
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}}
217 int n = {}; // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}}
219 class PrivateMember {
222 template<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]}}
223 return typename T::ImPrivate();
225 int SFINAEAccessControl(...) { return 0; }
226 int CheckSFINAEAccessControl = SFINAEAccessControl(PrivateMember());
229 struct FriendRedefinition {
230 friend void Friend() {} // expected-warning {{friend function 'Friend' would be implicitly redefined in C++98}} expected-note {{previous}}
232 FriendRedefinition<int> FriendRedef1;
233 FriendRedefinition<char> FriendRedef2; // expected-note {{requested here}}
235 namespace CopyCtorIssues {
239 Private(const Private&); // expected-note {{declared private here}}
243 NoViable(NoViable&); // expected-note {{not viable}}
247 Ambiguous(const Ambiguous &, int = 0); // expected-note {{candidate}}
248 Ambiguous(const Ambiguous &, double = 0); // expected-note {{candidate}}
251 Private p; // expected-note {{implicitly deleted}}
254 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}}
255 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}}
256 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}}
257 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}}
260 namespace UnionOrAnonStructMembers {
262 NonTrivCtor(); // expected-note 2{{user-provided default constructor}}
265 NonTrivCopy(const NonTrivCopy&); // expected-note 2{{user-provided copy constructor}}
268 ~NonTrivDtor(); // expected-note 2{{user-provided destructor}}
271 NonTrivCtor ntc; // expected-warning {{union member 'ntc' with a non-trivial constructor is incompatible with C++98}}
272 NonTrivCopy ntcp; // expected-warning {{union member 'ntcp' with a non-trivial copy constructor is incompatible with C++98}}
273 NonTrivDtor ntd; // expected-warning {{union member 'ntd' with a non-trivial destructor is incompatible with C++98}}
277 NonTrivCtor ntc; // expected-warning {{anonymous struct member 'ntc' with a non-trivial constructor is incompatible with C++98}}
278 NonTrivCopy ntcp; // expected-warning {{anonymous struct member 'ntcp' with a non-trivial copy constructor is incompatible with C++98}}
279 NonTrivDtor ntd; // expected-warning {{anonymous struct member 'ntd' with a non-trivial destructor is incompatible with C++98}}
282 union WithStaticDataMember {
283 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}}
284 static const int n = 0; // expected-warning {{static data member 'n' in union is incompatible with C++98}}
285 static int k; // expected-warning {{static data member 'k' in union is incompatible with C++98}}
289 int EnumNNS = Enum::enum_val; // expected-warning {{enumeration type in nested name specifier is incompatible with C++98}}
290 template<typename T> void EnumNNSFn() {
291 int k = T::enum_val; // expected-warning {{enumeration type in nested name specifier is incompatible with C++98}}
293 template void EnumNNSFn<Enum>(); // expected-note {{in instantiation}}
295 void JumpDiagnostics(int n) {
296 goto DirectJump; // expected-warning {{goto would jump into protected scope in C++98}}
297 TrivialButNonPOD tnp1; // expected-note {{jump bypasses initialization of non-POD variable}}
300 void *Table[] = {&&DirectJump, &&Later};
301 goto *Table[n]; // expected-warning {{indirect goto might cross protected scopes in C++98}}
303 TrivialButNonPOD tnp2; // expected-note {{jump bypasses initialization of non-POD variable}}
304 Later: // expected-note {{possible target of indirect goto}}
306 TrivialButNonPOD tnp3; // expected-note {{jump bypasses initialization of non-POD variable}}
307 default: // expected-warning {{switch case would be in a protected scope in C++98}}
312 namespace UnevaluatedMemberAccess {
315 int f() { return sizeof(S::n); } // ok
317 int k = sizeof(S::n); // expected-warning {{use of non-static data member 'n' in an unevaluated context is incompatible with C++98}}
318 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}}
321 namespace LiteralUCNs {
322 char c1 = '\u001e'; // expected-warning {{universal character name referring to a control character is incompatible with C++98}}
323 wchar_t c2 = L'\u0041'; // expected-warning {{specifying character 'A' with a universal character name is incompatible with C++98}}
324 const char *s1 = "foo\u0031"; // expected-warning {{specifying character '1' with a universal character name is incompatible with C++98}}
325 const wchar_t *s2 = L"bar\u0085"; // expected-warning {{universal character name referring to a control character is incompatible with C++98}}
328 namespace NonTypeTemplateArgs {
329 template<typename T, T v> struct S {};
330 const int k = 5; // expected-note {{here}}
331 static void f() {} // expected-note {{here}}
332 S<const int&, k> s1; // expected-warning {{non-type template argument referring to object 'k' with internal linkage is incompatible with C++98}}
333 S<void(&)(), f> s2; // expected-warning {{non-type template argument referring to function 'f' with internal linkage is incompatible with C++98}}
336 namespace NullPointerTemplateArg {
338 template<int*> struct X {};
339 template<int A::*> struct Y {};
340 X<(int*)0> x; // expected-warning {{use of null pointer as non-type template argument is incompatible with C++98}}
341 Y<(int A::*)0> y; // expected-warning {{use of null pointer as non-type template argument is incompatible with C++98}}
345 struct basic_iterator {
346 basic_iterator(const basic_iterator &it) {} // expected-note {{because type 'PR13480::basic_iterator' has a user-provided copy constructor}}
347 basic_iterator(basic_iterator &it) {}
351 basic_iterator it; // expected-warning {{union member 'it' with a non-trivial copy constructor is incompatible with C++98}}
355 namespace AssignOpUnion {
357 void operator=(const a &it) {} // expected-note {{because type 'AssignOpUnion::a' has a user-provided copy assignment operator}}
358 void operator=(a &it) {}
362 void operator=(const b &it) {} // expected-note {{because type 'AssignOpUnion::b' has a user-provided copy assignment operator}}
366 a x; // expected-warning {{union member 'x' with a non-trivial copy assignment operator is incompatible with C++98}}
367 b y; // expected-warning {{union member 'y' with a non-trivial copy assignment operator is incompatible with C++98}}
371 namespace rdar11736429 {
372 struct X { // expected-note {{because type 'rdar11736429::X' has no default constructor}}
373 X(const X&) = delete; // expected-warning{{deleted function definitions are incompatible with C++98}} \
374 // expected-note {{implicit default constructor suppressed by user-declared constructor}}
378 X x; // expected-warning{{union member 'x' with a non-trivial constructor is incompatible with C++98}}
382 template<typename T> T var = T(10);
384 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
386 // expected-warning@-4 {{variable templates are a C++1y extension}}
389 template<typename T> T* var<T*> = new T();
391 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
393 // expected-warning@-4 {{variable templates are a C++1y extension}}
396 template<> int var<int> = 10;
398 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
400 // expected-warning@-4 {{variable templates are a C++1y extension}}
403 template int var<int>;
404 float fvar = var<float>;
407 template<typename T> static T var = T(10);
409 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
411 // expected-warning@-4 {{variable templates are a C++1y extension}}
414 template<typename T> static T* var<T*> = new T();
416 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
418 // expected-warning@-4 {{variable templates are a C++1y extension}}
423 struct B { template<typename T> static T v; };
425 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
427 // expected-warning@-4 {{variable templates are a C++1y extension}}
430 template<typename T> T B::v = T();
432 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
434 // expected-warning@-4 {{variable templates are a C++1y extension}}
437 template<typename T> T* B::v<T*> = new T();
439 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
441 // expected-warning@-4 {{variable templates are a C++1y extension}}
444 template<> int B::v<int> = 10;
446 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++1y}}
448 // expected-warning@-4 {{variable templates are a C++1y extension}}
451 template int B::v<int>;
452 float fsvar = B::v<float>;
455 int digit_seps = 123'456; // expected-warning {{digit separators are incompatible with C++ standards before C++1y}}