1 | // RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -verify -std=c++11 -Wc++14-compat -Wc++14-extensions -Wc++17-extensions %s |
2 | |
3 | // Need std::initializer_list |
4 | namespace std { |
5 | typedef decltype(sizeof(int)) size_t; |
6 | |
7 | // libc++'s implementation |
8 | template <class _E> |
9 | class initializer_list |
10 | { |
11 | const _E* __begin_; |
12 | size_t __size_; |
13 | |
14 | initializer_list(const _E* __b, size_t __s) |
15 | : __begin_(__b), |
16 | __size_(__s) |
17 | {} |
18 | |
19 | public: |
20 | typedef _E value_type; |
21 | typedef const _E& reference; |
22 | typedef const _E& const_reference; |
23 | typedef size_t size_type; |
24 | |
25 | typedef const _E* iterator; |
26 | typedef const _E* const_iterator; |
27 | |
28 | initializer_list() : __begin_(nullptr), __size_(0) {} |
29 | |
30 | size_t size() const {return __size_;} |
31 | const _E* begin() const {return __begin_;} |
32 | const _E* end() const {return __begin_ + __size_;} |
33 | }; |
34 | } |
35 | |
36 | |
37 | // Declaration syntax checks |
38 | [[]] int before_attr; |
39 | int [[]] between_attr; |
40 | const [[]] int between_attr_2 = 0; // expected-error {{an attribute list cannot appear here}} |
41 | int after_attr [[]]; |
42 | int * [[]] ptr_attr; |
43 | int & [[]] ref_attr = after_attr; |
44 | int & [[unknown]] ref_attr_2 = after_attr; // expected-warning {{unknown attribute 'unknown' ignored}} |
45 | int & [[noreturn]] ref_attr_3 = after_attr; // expected-error {{'noreturn' attribute cannot be applied to types}} |
46 | int && [[]] rref_attr = 0; |
47 | int array_attr [1] [[]]; |
48 | alignas(8) int aligned_attr; |
49 | [[test::valid(for 42 [very] **** '+' symbols went on a trip and had a "good"_time; the end.)]] int garbage_attr; // expected-warning {{unknown attribute 'valid' ignored}} |
50 | [[,,,static, class, namespace,, inline, constexpr, mutable,, bitand, bitor::compl(!.*_ Cx.!U^*R),,,]] int more_garbage_attr; // expected-warning {{unknown attribute 'static' ignored}} \ |
51 | // expected-warning {{unknown attribute 'class' ignored}} \ |
52 | // expected-warning {{unknown attribute 'namespace' ignored}} \ |
53 | // expected-warning {{unknown attribute 'inline' ignored}} \ |
54 | // expected-warning {{unknown attribute 'constexpr' ignored}} \ |
55 | // expected-warning {{unknown attribute 'mutable' ignored}} \ |
56 | // expected-warning {{unknown attribute 'bitand' ignored}} \ |
57 | // expected-warning {{unknown attribute 'compl' ignored}} |
58 | [[u8"invalid!"]] int invalid_string_attr; // expected-error {{expected ']'}} |
59 | void fn_attr () [[]]; |
60 | void noexcept_fn_attr () noexcept [[]]; |
61 | struct MemberFnOrder { |
62 | virtual void f() const volatile && noexcept [[]] final = 0; |
63 | }; |
64 | struct [[]] struct_attr; |
65 | class [[]] class_attr {}; |
66 | union [[]] union_attr; |
67 | enum [[]] E { }; |
68 | namespace test_misplacement { |
69 | [[]] struct struct_attr2; //expected-error{{misplaced attributes}} |
70 | [[]] class class_attr2; //expected-error{{misplaced attributes}} |
71 | [[]] union union_attr2; //expected-error{{misplaced attributes}} |
72 | [[]] enum E2 { }; //expected-error{{misplaced attributes}} |
73 | } |
74 | |
75 | // Checks attributes placed at wrong syntactic locations of class specifiers. |
76 | class [[]] [[]] |
77 | attr_after_class_name_decl [[]] [[]]; // expected-error {{an attribute list cannot appear here}} |
78 | |
79 | class [[]] [[]] |
80 | attr_after_class_name_definition [[]] [[]] [[]]{}; // expected-error {{an attribute list cannot appear here}} |
81 | |
82 | class [[]] c {}; |
83 | class c [[]] [[]] x; |
84 | class c [[]] [[]] y [[]] [[]]; |
85 | class c final [(int){0}]; |
86 | |
87 | class base {}; |
88 | class [[]] [[]] final_class |
89 | alignas(float) [[]] final // expected-error {{an attribute list cannot appear here}} |
90 | alignas(float) [[]] [[]] alignas(float): base{}; // expected-error {{an attribute list cannot appear here}} |
91 | |
92 | class [[]] [[]] final_class_another |
93 | [[]] [[]] alignas(16) final // expected-error {{an attribute list cannot appear here}} |
94 | [[]] [[]] alignas(16) [[]]{}; // expected-error {{an attribute list cannot appear here}} |
95 | |
96 | // The diagnostics here don't matter much, this just shouldn't crash: |
97 | class C final [[deprecated(l]] {}); // expected-error {{use of undeclared identifier}} expected-error {{expected ']'}} expected-error {{an attribute list cannot appear here}} expected-error {{expected unqualified-id}} |
98 | class D final alignas ([l) {}]{}); // expected-error {{expected ',' or ']' in lambda capture list}} expected-error {{an attribute list cannot appear here}} |
99 | |
100 | [[]] struct with_init_declarators {} init_declarator; |
101 | [[]] struct no_init_declarators; // expected-error {{misplaced attributes}} |
102 | template<typename> [[]] struct no_init_declarators_template; // expected-error {{an attribute list cannot appear here}} |
103 | void fn_with_structs() { |
104 | [[]] struct with_init_declarators {} init_declarator; |
105 | [[]] struct no_init_declarators; // expected-error {{an attribute list cannot appear here}} |
106 | } |
107 | [[]]; |
108 | struct ctordtor { |
109 | [[]] ctordtor [[]] () [[]]; |
110 | ctordtor (C) [[]]; |
111 | [[]] ~ctordtor [[]] () [[]]; |
112 | }; |
113 | [[]] ctordtor::ctordtor [[]] () [[]] {} |
114 | [[]] ctordtor::ctordtor (C) [[]] try {} catch (...) {} |
115 | [[]] ctordtor::~ctordtor [[]] () [[]] {} |
116 | extern "C++" [[]] int extern_attr; |
117 | template <typename T> [[]] void template_attr (); |
118 | [[]] [[]] int [[]] [[]] multi_attr [[]] [[]]; |
119 | |
120 | int comma_attr [[,]]; |
121 | int scope_attr [[foo::]]; // expected-error {{expected identifier}} |
122 | int (paren_attr) [[]]; // expected-error {{an attribute list cannot appear here}} |
123 | unsigned [[]] int attr_in_decl_spec; // expected-error {{an attribute list cannot appear here}} |
124 | unsigned [[]] int [[]] const double_decl_spec = 0; // expected-error 2{{an attribute list cannot appear here}} |
125 | class foo { |
126 | void const_after_attr () [[]] const; // expected-error {{expected ';'}} |
127 | }; |
128 | extern "C++" [[]] { } // expected-error {{an attribute list cannot appear here}} |
129 | [[]] template <typename T> void before_template_attr (); // expected-error {{an attribute list cannot appear here}} |
130 | [[]] namespace ns { int i; } // expected-error {{an attribute list cannot appear here}} expected-note {{declared here}} |
131 | [[]] static_assert(true, ""); //expected-error {{an attribute list cannot appear here}} |
132 | [[]] asm(""); // expected-error {{an attribute list cannot appear here}} |
133 | |
134 | [[]] using ns::i; // expected-error {{an attribute list cannot appear here}} |
135 | [[unknown]] using namespace ns; // expected-warning {{unknown attribute 'unknown' ignored}} |
136 | [[noreturn]] using namespace ns; // expected-error {{'noreturn' attribute only applies to functions}} |
137 | namespace [[]] ns2 {} // expected-warning {{attributes on a namespace declaration are a C++17 extension}} |
138 | |
139 | using [[]] alignas(4) [[]] ns::i; // expected-error {{an attribute list cannot appear here}} |
140 | using [[]] alignas(4) [[]] foobar = int; // expected-error {{an attribute list cannot appear here}} expected-error {{'alignas' attribute only applies to}} |
141 | |
142 | void bad_attributes_in_do_while() { |
143 | do {} while ( |
144 | [[ns::i); // expected-error {{expected ']'}} \ |
145 | // expected-note {{to match this '['}} \ |
146 | // expected-error {{expected expression}} |
147 | do {} while ( |
148 | [[a]b ns::i); // expected-error {{expected ']'}} \ |
149 | // expected-note {{to match this '['}} \ |
150 | // expected-error {{expected expression}} |
151 | do {} while ( |
152 | [[ab]ab] ns::i); // expected-error {{an attribute list cannot appear here}} |
153 | do {} while ( // expected-note {{to match this '('}} |
154 | alignas(4 ns::i; // expected-note {{to match this '('}} |
155 | } // expected-error 2{{expected ')'}} expected-error {{expected expression}} |
156 | |
157 | [[]] using T = int; // expected-error {{an attribute list cannot appear here}} |
158 | using T [[]] = int; // ok |
159 | template<typename T> using U [[]] = T; |
160 | using ns::i [[]]; // expected-error {{an attribute list cannot appear here}} |
161 | using [[]] ns::i; // expected-error {{an attribute list cannot appear here}} |
162 | using T [[unknown]] = int; // expected-warning {{unknown attribute 'unknown' ignored}} |
163 | using T [[noreturn]] = int; // expected-error {{'noreturn' attribute only applies to functions}} |
164 | using V = int; // expected-note {{previous}} |
165 | using V [[gnu::vector_size(16)]] = int; // expected-error {{redefinition with different types}} |
166 | |
167 | auto trailing() -> [[]] const int; // expected-error {{an attribute list cannot appear here}} |
168 | auto trailing() -> const [[]] int; // expected-error {{an attribute list cannot appear here}} |
169 | auto trailing() -> const int [[]]; |
170 | auto trailing_2() -> struct struct_attr [[]]; |
171 | |
172 | namespace N { |
173 | struct S {}; |
174 | }; |
175 | template<typename> struct Template {}; |
176 | |
177 | // FIXME: Improve this diagnostic |
178 | struct [[]] N::S s; // expected-error {{an attribute list cannot appear here}} |
179 | struct [[]] Template<int> t; // expected-error {{an attribute list cannot appear here}} |
180 | struct [[]] ::template Template<int> u; // expected-error {{an attribute list cannot appear here}} |
181 | template struct [[]] Template<char>; // expected-error {{an attribute list cannot appear here}} |
182 | template <> struct [[]] Template<void>; |
183 | |
184 | enum [[]] E1 {}; |
185 | enum [[]] E2; // expected-error {{forbids forward references}} |
186 | enum [[]] E1; |
187 | enum [[]] E3 : int; |
188 | enum [[]] { |
189 | k_123 [[]] = 123 // expected-warning {{attributes on an enumerator declaration are a C++17 extension}} |
190 | }; |
191 | enum [[]] E1 e; // expected-error {{an attribute list cannot appear here}} |
192 | enum [[]] class E4 { }; // expected-error {{an attribute list cannot appear here}} |
193 | enum struct [[]] E5; |
194 | |
195 | struct S { |
196 | friend int f [[]] (); // expected-FIXME{{an attribute list cannot appear here}} |
197 | friend int f1 [[noreturn]] (); //expected-error{{an attribute list cannot appear here}} |
198 | friend int f2 [[]] [[noreturn]] () {} |
199 | [[]] friend int g(); // expected-error{{an attribute list cannot appear here}} |
200 | [[]] friend int h() { |
201 | } |
202 | [[]] friend int f3(), f4(), f5(); // expected-error{{an attribute list cannot appear here}} |
203 | friend int f6 [[noreturn]] (), f7 [[noreturn]] (), f8 [[noreturn]] (); // expected-error3 {{an attribute list cannot appear here}} |
204 | friend class [[]] C; // expected-error{{an attribute list cannot appear here}} |
205 | [[]] friend class D; // expected-error{{an attribute list cannot appear here}} |
206 | [[]] friend int; // expected-error{{an attribute list cannot appear here}} |
207 | }; |
208 | template<typename T> void tmpl(T) {} |
209 | template void tmpl [[]] (int); // expected-FIXME {{an attribute list cannot appear here}} |
210 | template [[]] void tmpl(char); // expected-error {{an attribute list cannot appear here}} |
211 | template void [[]] tmpl(short); |
212 | |
213 | // Argument tests |
214 | alignas int aligned_no_params; // expected-error {{expected '('}} |
215 | alignas(i) int aligned_nonconst; // expected-error {{'aligned' attribute requires integer constant}} expected-note {{read of non-const variable 'i'}} |
216 | |
217 | // Statement tests |
218 | void foo () { |
219 | [[]] ; |
220 | [[]] { } |
221 | [[]] if (0) { } |
222 | [[]] for (;;); |
223 | [[]] do { |
224 | [[]] continue; |
225 | } while (0); |
226 | [[]] while (0); |
227 | |
228 | [[]] switch (i) { |
229 | [[]] case 0: |
230 | [[]] default: |
231 | [[]] break; |
232 | } |
233 | |
234 | [[]] goto there; |
235 | [[]] there: |
236 | |
237 | [[]] try { |
238 | } [[]] catch (...) { // expected-error {{an attribute list cannot appear here}} |
239 | } |
240 | struct S { int arr[2]; } s; |
241 | (void)s.arr[ [] { return 0; }() ]; // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}} |
242 | int n = __builtin_offsetof(S, arr[ [] { return 0; }() ]); // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}} |
243 | |
244 | void bar [[noreturn]] ([[]] int i, [[]] int j); |
245 | using FuncType = void ([[]] int); |
246 | void baz([[]]...); // expected-error {{expected parameter declarator}} |
247 | |
248 | [[]] return; |
249 | } |
250 | |
251 | template<typename...Ts> void variadic() { |
252 | void bar [[noreturn...]] (); // expected-error {{attribute 'noreturn' cannot be used as an attribute pack}} |
253 | } |
254 | |
255 | // Expression tests |
256 | void bar () { |
257 | // FIXME: GCC accepts [[gnu::noreturn]] on a lambda, even though it appertains |
258 | // to the operator()'s type, and GCC does not otherwise accept attributes |
259 | // applied to types. Use that to test this. |
260 | [] () [[gnu::noreturn]] { return; } (); // expected-warning {{attribute 'noreturn' ignored}} FIXME-error {{should not return}} |
261 | [] () [[gnu::noreturn]] { throw; } (); // expected-warning {{attribute 'noreturn' ignored}} |
262 | new int[42][[]][5][[]]{}; |
263 | } |
264 | |
265 | // Condition tests |
266 | void baz () { |
267 | if ([[unknown]] bool b = true) { // expected-warning {{unknown attribute 'unknown' ignored}} |
268 | switch ([[unknown]] int n { 42 }) { // expected-warning {{unknown attribute 'unknown' ignored}} |
269 | default: |
270 | for ([[unknown]] int n = 0; [[unknown]] char b = n < 5; ++b) { // expected-warning 2{{unknown attribute 'unknown' ignored}} |
271 | } |
272 | } |
273 | } |
274 | int x; |
275 | // An attribute can be applied to an expression-statement, such as the first |
276 | // statement in a for. But it can't be applied to a condition which is an |
277 | // expression. |
278 | for ([[]] x = 0; ; ) {} // expected-error {{an attribute list cannot appear here}} |
279 | for (; [[]] x < 5; ) {} // expected-error {{an attribute list cannot appear here}} |
280 | while ([[]] bool k { false }) { |
281 | } |
282 | while ([[]] true) { // expected-error {{an attribute list cannot appear here}} |
283 | } |
284 | do { |
285 | } while ([[]] false); // expected-error {{an attribute list cannot appear here}} |
286 | |
287 | for ([[unknown]] int n : { 1, 2, 3 }) { // expected-warning {{unknown attribute 'unknown' ignored}} |
288 | } |
289 | } |
290 | |
291 | enum class __attribute__((visibility("hidden"))) SecretKeepers { |
292 | one, /* rest are deprecated */ two, three |
293 | }; |
294 | enum class [[]] EvenMoreSecrets {}; |
295 | |
296 | namespace arguments { |
297 | void f[[gnu::format(printf, 1, 2)]](const char*, ...); |
298 | void g() [[unknown::foo(ignore arguments for unknown attributes, even with symbols!)]]; // expected-warning {{unknown attribute 'foo' ignored}} |
299 | [[deprecated("with argument")]] int i; |
300 | // expected-warning@-1 {{use of the 'deprecated' attribute is a C++14 extension}} |
301 | } |
302 | |
303 | // Forbid attributes on decl specifiers. |
304 | unsigned [[gnu::used]] static int [[gnu::unused]] v1; // expected-error {{'unused' attribute cannot be applied to types}} \ |
305 | expected-error {{an attribute list cannot appear here}} |
306 | typedef [[gnu::used]] unsigned long [[gnu::unused]] v2; // expected-error {{'unused' attribute cannot be applied to types}} \ |
307 | expected-error {{an attribute list cannot appear here}} |
308 | int [[carries_dependency]] foo(int [[carries_dependency]] x); // expected-error 2{{'carries_dependency' attribute cannot be applied to types}} |
309 | |
310 | // Forbid [[gnu::...]] attributes on declarator chunks. |
311 | int *[[gnu::unused]] v3; // expected-warning {{attribute 'unused' ignored}} |
312 | int v4[2][[gnu::unused]]; // expected-warning {{attribute 'unused' ignored}} |
313 | int v5()[[gnu::unused]]; // expected-warning {{attribute 'unused' ignored}} |
314 | |
315 | [[attribute_declaration]]; // expected-warning {{unknown attribute 'attribute_declaration' ignored}} |
316 | [[noreturn]]; // expected-error {{'noreturn' attribute only applies to functions}} |
317 | [[carries_dependency]]; // expected-error {{'carries_dependency' attribute only applies to parameters, Objective-C methods, and functions}} |
318 | |
319 | class A { |
320 | A([[gnu::unused]] int a); |
321 | }; |
322 | A::A([[gnu::unused]] int a) {} |
323 | |
324 | namespace GccConst { |
325 | // GCC's tokenizer treats const and __const as the same token. |
326 | [[gnu::const]] int *f1(); |
327 | [[gnu::__const]] int *f2(); |
328 | [[gnu::__const__]] int *f3(); |
329 | void f(const int *); |
330 | void g() { f(f1()); f(f2()); } |
331 | void h() { f(f3()); } |
332 | } |
333 | |
334 | namespace GccASan { |
335 | __attribute__((no_address_safety_analysis)) void f1(); |
336 | __attribute__((no_sanitize_address)) void f2(); |
337 | [[gnu::no_address_safety_analysis]] void f3(); |
338 | [[gnu::no_sanitize_address]] void f4(); |
339 | } |
340 | |
341 | namespace { |
342 | [[deprecated]] void bar(); |
343 | // expected-warning@-1 {{use of the 'deprecated' attribute is a C++14 extension}} |
344 | [[deprecated("hello")]] void baz(); |
345 | // expected-warning@-1 {{use of the 'deprecated' attribute is a C++14 extension}} |
346 | [[deprecated()]] void foo(); |
347 | // expected-error@-1 {{parentheses must be omitted if 'deprecated' attribute's argument list is empty}} |
348 | [[gnu::deprecated()]] void quux(); |
349 | } |
350 | |
351 | namespace { |
352 | [[ // expected-error {{expected ']'}} |
353 | #pragma pack(pop) |
354 | deprecated |
355 | ]] void bad(); |
356 | } |
357 | |
358 | int fallthru(int n) { |
359 | switch (n) { |
360 | case 0: |
361 | n += 5; |
362 | [[fallthrough]]; // expected-warning {{use of the 'fallthrough' attribute is a C++17 extension}} |
363 | case 1: |
364 | n *= 2; |
365 | break; |
366 | } |
367 | return n; |
368 | } |
369 | |
370 | #define attr_name bitand |
371 | #define attr_name_2(x) x |
372 | #define attr_name_3(x, y) x##y |
373 | [[attr_name, attr_name_2(bitor), attr_name_3(com, pl)]] int macro_attrs; // expected-warning {{unknown attribute 'compl' ignored}} \ |
374 | expected-warning {{unknown attribute 'bitor' ignored}} \ |
375 | expected-warning {{unknown attribute 'bitand' ignored}} |
376 | |
377 | // Check that we can parse an attribute in our vendor namespace. |
378 | [[clang::annotate("test")]] void annotate1(); |
379 | [[_Clang::annotate("test")]] void annotate2(); |
380 | // Note: __clang__ is a predefined macro, which is why _Clang is the |
381 | // prefered "protected" vendor namespace. We support __clang__ only for |
382 | // people expecting it to behave the same as __gnu__. |
383 | [[__clang__::annotate("test")]] void annotate3(); // expected-warning {{'__clang__' is a predefined macro name, not an attribute scope specifier; did you mean '_Clang' instead?}} |
384 | |