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
Literals()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
Lambda()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
InitList(int i={})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 {
fDelayedDefaultArgumentParseInitList80 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 #ifdef CXX14COMPAT
ff()104 auto ff() { return 5; } // expected-warning {{'auto' type specifier is incompatible with C++98}}
105 #endif
106
RangeFor()107 void RangeFor() {
108 int xs[] = {1, 2, 3};
109 for (int &a : xs) { // expected-warning {{range-based for loop is incompatible with C++98}}
110 }
111 for (auto &b : {1, 2, 3}) {
112 // expected-warning@-1 {{range-based for loop is incompatible with C++98}}
113 // expected-warning@-2 {{'auto' type specifier is incompatible with C++98}}
114 // expected-warning@-3 {{initialization of initializer_list object is incompatible with C++98}}
115 // expected-warning@-4 {{reference initialized from initializer list is incompatible with C++98}}
116 }
117 struct Agg { int a, b; } const &agg = { 1, 2 }; // expected-warning {{reference initialized from initializer list is incompatible with C++98}}
118 }
119
120 struct InClassInit {
121 int n = 0; // expected-warning {{in-class initialization of non-static data members is incompatible with C++98}}
122 };
123
124 struct OverrideControlBase {
125 virtual void f();
126 virtual void g();
127 };
128 struct OverrideControl final : OverrideControlBase { // expected-warning {{'final' keyword is incompatible with C++98}}
129 virtual void f() override; // expected-warning {{'override' keyword is incompatible with C++98}}
130 virtual void g() final; // expected-warning {{'final' keyword is incompatible with C++98}}
131 };
132
133 using AliasDecl = int; // expected-warning {{alias declarations are incompatible with C++98}}
134 template<typename T> using AliasTemplate = T; // expected-warning {{alias declarations are incompatible with C++98}}
135
136 inline namespace InlineNS { // expected-warning {{inline namespaces are incompatible with C++98}}
137 }
138
139 auto auto_deduction = 0; // expected-warning {{'auto' type specifier is incompatible with C++98}}
140 int *p = new auto(0); // expected-warning {{'auto' type specifier is incompatible with C++98}}
141
142 const int align_of = alignof(int); // expected-warning {{alignof expressions are incompatible with C++98}}
143 char16_t c16 = 0; // expected-warning {{'char16_t' type specifier is incompatible with C++98}}
144 char32_t c32 = 0; // expected-warning {{'char32_t' type specifier is incompatible with C++98}}
145 constexpr int const_expr = 0; // expected-warning {{'constexpr' specifier is incompatible with C++98}}
146 decltype(const_expr) decl_type = 0; // expected-warning {{'decltype' type specifier is incompatible with C++98}}
147 __decltype(const_expr) decl_type2 = 0; // ok
148 void no_except() noexcept; // expected-warning {{noexcept specifications are incompatible with C++98}}
149 bool no_except_expr = noexcept(1 + 1); // expected-warning {{noexcept expressions are incompatible with C++98}}
150 void *null = nullptr; // expected-warning {{'nullptr' is incompatible with C++98}}
151 static_assert(true, "!"); // expected-warning {{static_assert declarations are incompatible with C++98}}
152
153 struct InhCtorBase {
154 InhCtorBase(int);
155 };
156 struct InhCtorDerived : InhCtorBase {
157 using InhCtorBase::InhCtorBase; // expected-warning {{inheriting constructors are incompatible with C++98}}
158 };
159
160 struct FriendMember {
161 static void MemberFn();
162 friend void FriendMember::MemberFn(); // expected-warning {{friend declaration naming a member of the declaring class is incompatible with C++98}}
163 };
164
165 struct DelegCtor {
DelegCtorDelegCtor166 DelegCtor(int) : DelegCtor() {} // expected-warning {{delegating constructors are incompatible with C++98}}
167 DelegCtor();
168 };
169
170 template<int n = 0> void DefaultFuncTemplateArg(); // expected-warning {{default template arguments for a function template are incompatible with C++98}}
171
TemplateFn(T)172 template<typename T> int TemplateFn(T) { return 0; }
LocalTemplateArg()173 void LocalTemplateArg() {
174 struct S {};
175 TemplateFn(S()); // expected-warning {{local type 'S' as template argument is incompatible with C++98}}
176 }
177 struct {} obj_of_unnamed_type; // expected-note {{here}}
178 int UnnamedTemplateArg = TemplateFn(obj_of_unnamed_type); // expected-warning {{unnamed type as template argument is incompatible with C++98}}
179
180 namespace RedundantParensInAddressTemplateParam {
181 int n;
182 template<int*p> struct S {};
183 S<(&n)> s; // expected-warning {{redundant parentheses surrounding address non-type template argument are incompatible with C++98}}
184 S<(((&n)))> t; // expected-warning {{redundant parentheses surrounding address non-type template argument are incompatible with C++98}}
185 }
186
187 namespace TemplateSpecOutOfScopeNs {
188 template<typename T> struct S {}; // expected-note {{here}}
189 }
190 template<> struct TemplateSpecOutOfScopeNs::S<char> {}; // expected-warning {{class template specialization of 'S' outside namespace 'TemplateSpecOutOfScopeNs' is incompatible with C++98}}
191
192 struct Typename {
193 template<typename T> struct Inner {};
194 };
195 typename ::Typename TypenameOutsideTemplate(); // expected-warning {{use of 'typename' outside of a template is incompatible with C++98}}
196 Typename::template Inner<int> TemplateOutsideTemplate(); // expected-warning {{use of 'template' keyword outside of a template is incompatible with C++98}}
197
198 struct TrivialButNonPOD {
199 int f(int);
200 private:
201 int k;
202 };
203 void Ellipsis(int n, ...);
TrivialButNonPODThroughEllipsis()204 void TrivialButNonPODThroughEllipsis() {
205 Ellipsis(1, TrivialButNonPOD()); // expected-warning {{passing object of trivial but non-POD type 'TrivialButNonPOD' through variadic function is incompatible with C++98}}
206 }
207
208 struct HasExplicitConversion {
209 explicit operator bool(); // expected-warning {{explicit conversion functions are incompatible with C++98}}
210 };
211
212 struct Struct {};
213 enum Enum { enum_val = 0 };
214 struct BadFriends {
215 friend enum ::Enum; // expected-warning {{befriending enumeration type 'enum ::Enum' is incompatible with C++98}}
216 friend int; // expected-warning {{non-class friend type 'int' is incompatible with C++98}}
217 friend Struct; // expected-warning {{befriending 'Struct' without 'struct' keyword is incompatible with C++98}}
218 };
219
220 int n = {}; // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}}
221
222 class PrivateMember {
223 struct ImPrivate {};
224 };
SFINAEAccessControl(T t)225 template<typename T> typename T::ImPrivate SFINAEAccessControl(T t) { // expected-warning {{substitution failure due to access control is incompatible with C++98}}
226 return typename T::ImPrivate();
227 }
SFINAEAccessControl(...)228 int SFINAEAccessControl(...) { return 0; }
229 int CheckSFINAEAccessControl = SFINAEAccessControl(PrivateMember()); // expected-note {{while substituting deduced template arguments into function template 'SFINAEAccessControl' [with T = PrivateMember]}}
230
231 namespace UnionOrAnonStructMembers {
232 struct NonTrivCtor {
233 NonTrivCtor(); // expected-note 2{{user-provided default constructor}}
234 };
235 struct NonTrivCopy {
236 NonTrivCopy(const NonTrivCopy&); // expected-note 2{{user-provided copy constructor}}
237 };
238 struct NonTrivDtor {
239 ~NonTrivDtor(); // expected-note 2{{user-provided destructor}}
240 };
241 union BadUnion {
242 NonTrivCtor ntc; // expected-warning {{union member 'ntc' with a non-trivial constructor is incompatible with C++98}}
243 NonTrivCopy ntcp; // expected-warning {{union member 'ntcp' with a non-trivial copy constructor is incompatible with C++98}}
244 NonTrivDtor ntd; // expected-warning {{union member 'ntd' with a non-trivial destructor is incompatible with C++98}}
245 };
246 struct Wrap {
247 struct {
248 NonTrivCtor ntc; // expected-warning {{anonymous struct member 'ntc' with a non-trivial constructor is incompatible with C++98}}
249 NonTrivCopy ntcp; // expected-warning {{anonymous struct member 'ntcp' with a non-trivial copy constructor is incompatible with C++98}}
250 NonTrivDtor ntd; // expected-warning {{anonymous struct member 'ntd' with a non-trivial destructor is incompatible with C++98}}
251 };
252 };
253 union WithStaticDataMember {
254 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}}
255 static const int n = 0; // expected-warning {{static data member 'n' in union is incompatible with C++98}}
256 static int k; // expected-warning {{static data member 'k' in union is incompatible with C++98}}
257 };
258 }
259
260 int EnumNNS = Enum::enum_val; // expected-warning {{enumeration type in nested name specifier is incompatible with C++98}}
EnumNNSFn()261 template<typename T> void EnumNNSFn() {
262 int k = T::enum_val; // expected-warning {{enumeration type in nested name specifier is incompatible with C++98}}
263 };
264 template void EnumNNSFn<Enum>(); // expected-note {{in instantiation}}
265
JumpDiagnostics(int n)266 void JumpDiagnostics(int n) {
267 goto DirectJump; // expected-warning {{jump from this goto statement to its label is incompatible with C++98}}
268 TrivialButNonPOD tnp1; // expected-note {{jump bypasses initialization of non-POD variable}}
269
270 DirectJump:
271 void *Table[] = {&&DirectJump, &&Later};
272 goto *Table[n]; // expected-warning {{jump from this indirect goto statement to one of its possible targets is incompatible with C++98}}
273
274 TrivialButNonPOD tnp2; // expected-note {{jump bypasses initialization of non-POD variable}}
275 Later: // expected-note {{possible target of indirect goto statement}}
276 switch (n) {
277 TrivialButNonPOD tnp3; // expected-note {{jump bypasses initialization of non-POD variable}}
278 default: // expected-warning {{jump from switch statement to this case label is incompatible with C++98}}
279 return;
280 }
281 }
282
283 namespace UnevaluatedMemberAccess {
284 struct S {
285 int n;
fUnevaluatedMemberAccess::S286 int f() { return sizeof(S::n); } // ok
287 };
288 int k = sizeof(S::n); // expected-warning {{use of non-static data member 'n' in an unevaluated context is incompatible with C++98}}
289 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}}
290 }
291
292 namespace LiteralUCNs {
293 char c1 = '\u001e'; // expected-warning {{universal character name referring to a control character is incompatible with C++98}}
294 wchar_t c2 = L'\u0041'; // expected-warning {{specifying character 'A' with a universal character name is incompatible with C++98}}
295 const char *s1 = "foo\u0031"; // expected-warning {{specifying character '1' with a universal character name is incompatible with C++98}}
296 const wchar_t *s2 = L"bar\u0085"; // expected-warning {{universal character name referring to a control character is incompatible with C++98}}
297 }
298
299 namespace NonTypeTemplateArgs {
300 template<typename T, T v> struct S {};
301 const int k = 5; // expected-note {{here}}
f()302 static void f() {} // expected-note {{here}}
303 S<const int&, k> s1; // expected-warning {{non-type template argument referring to object 'k' with internal linkage is incompatible with C++98}}
304 S<void(&)(), f> s2; // expected-warning {{non-type template argument referring to function 'f' with internal linkage is incompatible with C++98}}
305 }
306
307 namespace NullPointerTemplateArg {
308 struct A {};
309 template<int*> struct X {};
310 template<int A::*> struct Y {};
311 X<(int*)0> x; // expected-warning {{use of null pointer as non-type template argument is incompatible with C++98}}
312 Y<(int A::*)0> y; // expected-warning {{use of null pointer as non-type template argument is incompatible with C++98}}
313 }
314
315 namespace PR13480 {
316 struct basic_iterator {
basic_iteratorPR13480::basic_iterator317 basic_iterator(const basic_iterator &it) {} // expected-note {{because type 'PR13480::basic_iterator' has a user-provided copy constructor}}
basic_iteratorPR13480::basic_iterator318 basic_iterator(basic_iterator &it) {}
319 };
320
321 union test {
322 basic_iterator it; // expected-warning {{union member 'it' with a non-trivial copy constructor is incompatible with C++98}}
323 };
324 }
325
326 namespace AssignOpUnion {
327 struct a {
operator =AssignOpUnion::a328 void operator=(const a &it) {} // expected-note {{because type 'AssignOpUnion::a' has a user-provided copy assignment operator}}
operator =AssignOpUnion::a329 void operator=(a &it) {}
330 };
331
332 struct b {
operator =AssignOpUnion::b333 void operator=(const b &it) {} // expected-note {{because type 'AssignOpUnion::b' has a user-provided copy assignment operator}}
334 };
335
336 union test1 {
337 a x; // expected-warning {{union member 'x' with a non-trivial copy assignment operator is incompatible with C++98}}
338 b y; // expected-warning {{union member 'y' with a non-trivial copy assignment operator is incompatible with C++98}}
339 };
340 }
341
342 namespace rdar11736429 {
343 struct X { // expected-note {{because type 'rdar11736429::X' has no default constructor}}
344 X(const X&) = delete; // expected-warning{{deleted function definitions are incompatible with C++98}} \
345 // expected-note {{implicit default constructor suppressed by user-declared constructor}}
346 };
347
348 union S {
349 X x; // expected-warning{{union member 'x' with a non-trivial constructor is incompatible with C++98}}
350 };
351 }
352
353 template<typename T> T var = T(10);
354 #ifdef CXX14COMPAT
355 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
356 #else
357 // expected-warning@-4 {{variable templates are a C++14 extension}}
358 #endif
359
360 // No diagnostic for specializations of variable templates; we will have
361 // diagnosed the primary template.
362 template<typename T> T* var<T*> = new T();
363 template<> int var<int> = 10;
364 template int var<int>;
365 float fvar = var<float>;
366
367 class A {
368 template<typename T> static T var = T(10);
369 #ifdef CXX14COMPAT
370 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
371 #else
372 // expected-warning@-4 {{variable templates are a C++14 extension}}
373 #endif
374
375 template<typename T> static T* var<T*> = new T();
376 };
377
378 struct B { template<typename T> static T v; };
379 #ifdef CXX14COMPAT
380 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
381 #else
382 // expected-warning@-4 {{variable templates are a C++14 extension}}
383 #endif
384
385 template<typename T> T B::v = T();
386 #ifdef CXX14COMPAT
387 // expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
388 #else
389 // expected-warning@-4 {{variable templates are a C++14 extension}}
390 #endif
391
392 template<typename T> T* B::v<T*> = new T();
393 template<> int B::v<int> = 10;
394 template int B::v<int>;
395 float fsvar = B::v<float>;
396
397 #ifdef CXX14COMPAT
398 int digit_seps = 123'456; // expected-warning {{digit separators are incompatible with C++ standards before C++14}}
399 #endif
400