1 // RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -verify -std=c++11 %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 68 // Checks attributes placed at wrong syntactic locations of class specifiers. 69 class [[]] [[]] 70 attr_after_class_name_decl [[]] [[]]; // expected-error {{an attribute list cannot appear here}} 71 72 class [[]] [[]] 73 attr_after_class_name_definition [[]] [[]] [[]]{}; // expected-error {{an attribute list cannot appear here}} 74 75 class [[]] c {}; 76 class c [[]] [[]] x; 77 class c [[]] [[]] y [[]] [[]]; 78 class c final [(int){0}]; 79 80 class base {}; 81 class [[]] [[]] final_class 82 alignas(float) [[]] final // expected-error {{an attribute list cannot appear here}} 83 alignas(float) [[]] [[]] alignas(float): base{}; // expected-error {{an attribute list cannot appear here}} 84 85 class [[]] [[]] final_class_another 86 [[]] [[]] alignas(16) final // expected-error {{an attribute list cannot appear here}} 87 [[]] [[]] alignas(16) [[]]{}; // expected-error {{an attribute list cannot appear here}} 88 89 [[]] struct with_init_declarators {} init_declarator; 90 [[]] struct no_init_declarators; // expected-error {{an attribute list cannot appear here}} 91 template<typename> [[]] struct no_init_declarators_template; // expected-error {{an attribute list cannot appear here}} 92 void fn_with_structs() { 93 [[]] struct with_init_declarators {} init_declarator; 94 [[]] struct no_init_declarators; // expected-error {{an attribute list cannot appear here}} 95 } 96 [[]]; 97 struct ctordtor { 98 [[]] ctordtor(); 99 [[]] ~ctordtor(); 100 }; 101 [[]] ctordtor::ctordtor() {} 102 [[]] ctordtor::~ctordtor() {} 103 extern "C++" [[]] int extern_attr; 104 template <typename T> [[]] void template_attr (); 105 [[]] [[]] int [[]] [[]] multi_attr [[]] [[]]; 106 107 int comma_attr [[,]]; 108 int scope_attr [[foo::]]; // expected-error {{expected identifier}} 109 int (paren_attr) [[]]; // expected-error {{an attribute list cannot appear here}} 110 unsigned [[]] int attr_in_decl_spec; // expected-error {{an attribute list cannot appear here}} 111 unsigned [[]] int [[]] const double_decl_spec = 0; // expected-error 2{{an attribute list cannot appear here}} 112 class foo { 113 void const_after_attr () [[]] const; // expected-error {{expected ';'}} 114 }; 115 extern "C++" [[]] { } // expected-error {{an attribute list cannot appear here}} 116 [[]] template <typename T> void before_template_attr (); // expected-error {{an attribute list cannot appear here}} 117 [[]] namespace ns { int i; } // expected-error {{an attribute list cannot appear here}} expected-note {{declared here}} 118 [[]] static_assert(true, ""); //expected-error {{an attribute list cannot appear here}} 119 [[]] asm(""); // expected-error {{an attribute list cannot appear here}} 120 121 [[]] using ns::i; // expected-error {{an attribute list cannot appear here}} 122 [[unknown]] using namespace ns; // expected-warning {{unknown attribute 'unknown' ignored}} 123 [[noreturn]] using namespace ns; // expected-error {{'noreturn' attribute only applies to functions and methods}} 124 125 [[]] using T = int; // expected-error {{an attribute list cannot appear here}} 126 using T [[]] = int; // ok 127 template<typename T> using U [[]] = T; 128 using ns::i [[]]; // expected-error {{an attribute list cannot appear here}} 129 using [[]] ns::i; // expected-error {{an attribute list cannot appear here}} 130 using T [[unknown]] = int; // expected-warning {{unknown attribute 'unknown' ignored}} 131 using T [[noreturn]] = int; // expected-error {{'noreturn' attribute only applies to functions and methods}} 132 using V = int; // expected-note {{previous}} 133 using V [[gnu::vector_size(16)]] = int; // expected-error {{redefinition with different types}} 134 135 auto trailing() -> [[]] const int; // expected-error {{an attribute list cannot appear here}} 136 auto trailing() -> const [[]] int; // expected-error {{an attribute list cannot appear here}} 137 auto trailing() -> const int [[]]; 138 auto trailing_2() -> struct struct_attr [[]]; 139 140 namespace N { 141 struct S {}; 142 }; 143 template<typename> struct Template {}; 144 145 // FIXME: Improve this diagnostic 146 struct [[]] N::S s; // expected-error {{an attribute list cannot appear here}} 147 struct [[]] Template<int> t; // expected-error {{an attribute list cannot appear here}} 148 struct [[]] ::template Template<int> u; // expected-error {{an attribute list cannot appear here}} 149 template struct [[]] Template<char>; // expected-error {{an attribute list cannot appear here}} 150 template <> struct [[]] Template<void>; 151 152 enum [[]] E1 {}; 153 enum [[]] E2; // expected-error {{forbids forward references}} 154 enum [[]] E1; 155 enum [[]] E3 : int; 156 enum [[]] { 157 k_123 [[]] = 123 // expected-error {{an attribute list cannot appear here}} 158 }; 159 enum [[]] E1 e; // expected-error {{an attribute list cannot appear here}} 160 enum [[]] class E4 { }; // expected-error {{an attribute list cannot appear here}} 161 enum struct [[]] E5; 162 163 struct S { 164 friend int f [[]] (); // expected-FIXME{{an attribute list cannot appear here}} 165 friend int f1 [[noreturn]] (); //expected-error{{an attribute list cannot appear here}} 166 friend int f2 [[]] [[noreturn]] () {} 167 [[]] friend int g(); // expected-error{{an attribute list cannot appear here}} 168 [[]] friend int h() { 169 } 170 [[]] friend int f3(), f4(), f5(); // expected-error{{an attribute list cannot appear here}} 171 friend int f6 [[noreturn]] (), f7 [[noreturn]] (), f8 [[noreturn]] (); // expected-error3 {{an attribute list cannot appear here}} 172 friend class [[]] C; // expected-error{{an attribute list cannot appear here}} 173 [[]] friend class D; // expected-error{{an attribute list cannot appear here}} 174 [[]] friend int; // expected-error{{an attribute list cannot appear here}} 175 }; 176 template<typename T> void tmpl(T) {} 177 template void tmpl [[]] (int); // expected-FIXME {{an attribute list cannot appear here}} 178 template [[]] void tmpl(char); // expected-error {{an attribute list cannot appear here}} 179 template void [[]] tmpl(short); 180 181 // Argument tests 182 alignas int aligned_no_params; // expected-error {{expected '('}} 183 alignas(i) int aligned_nonconst; // expected-error {{'aligned' attribute requires integer constant}} expected-note {{read of non-const variable 'i'}} 184 185 // Statement tests 186 void foo () { 187 [[]] ; 188 [[]] { } 189 [[]] if (0) { } 190 [[]] for (;;); 191 [[]] do { 192 [[]] continue; 193 } while (0); 194 [[]] while (0); 195 196 [[]] switch (i) { 197 [[]] case 0: 198 [[]] default: 199 [[]] break; 200 } 201 202 [[]] goto there; 203 [[]] there: 204 205 [[]] try { 206 } [[]] catch (...) { // expected-error {{an attribute list cannot appear here}} 207 } 208 struct S { int arr[2]; } s; 209 (void)s.arr[ [] { return 0; }() ]; // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}} 210 int n = __builtin_offsetof(S, arr[ [] { return 0; }() ]); // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}} 211 212 void bar [[noreturn]] ([[]] int i, [[]] int j); 213 using FuncType = void ([[]] int); 214 void baz([[]]...); // expected-error {{expected parameter declarator}} 215 216 [[]] return; 217 } 218 219 template<typename...Ts> void variadic() { 220 void bar [[noreturn...]] (); // expected-error {{attribute 'noreturn' cannot be used as an attribute pack}} 221 } 222 223 // Expression tests 224 void bar () { 225 // FIXME: GCC accepts [[gnu::noreturn]] on a lambda, even though it appertains 226 // to the operator()'s type, and GCC does not otherwise accept attributes 227 // applied to types. Use that to test this. 228 [] () [[gnu::noreturn]] { return; } (); // expected-warning {{attribute 'noreturn' ignored}} FIXME-error {{should not return}} 229 [] () [[gnu::noreturn]] { throw; } (); // expected-warning {{attribute 'noreturn' ignored}} 230 new int[42][[]][5][[]]{}; 231 } 232 233 // Condition tests 234 void baz () { 235 if ([[unknown]] bool b = true) { // expected-warning {{unknown attribute 'unknown' ignored}} 236 switch ([[unknown]] int n { 42 }) { // expected-warning {{unknown attribute 'unknown' ignored}} 237 default: 238 for ([[unknown]] int n = 0; [[unknown]] char b = n < 5; ++b) { // expected-warning 2{{unknown attribute 'unknown' ignored}} 239 } 240 } 241 } 242 int x; 243 // An attribute can be applied to an expression-statement, such as the first 244 // statement in a for. But it can't be applied to a condition which is an 245 // expression. 246 for ([[]] x = 0; ; ) {} // expected-error {{an attribute list cannot appear here}} 247 for (; [[]] x < 5; ) {} // expected-error {{an attribute list cannot appear here}} 248 while ([[]] bool k { false }) { 249 } 250 while ([[]] true) { // expected-error {{an attribute list cannot appear here}} 251 } 252 do { 253 } while ([[]] false); // expected-error {{an attribute list cannot appear here}} 254 255 for ([[unknown]] int n : { 1, 2, 3 }) { // expected-warning {{unknown attribute 'unknown' ignored}} 256 } 257 } 258 259 enum class __attribute__((visibility("hidden"))) SecretKeepers { 260 one, /* rest are deprecated */ two, three 261 }; 262 enum class [[]] EvenMoreSecrets {}; 263 264 namespace arguments { 265 void f[[gnu::format(printf, 1, 2)]](const char*, ...); 266 void g() [[unknown::foo(arguments of attributes from unknown namespace other than 'gnu' namespace are ignored... blah...)]]; // expected-warning {{unknown attribute 'foo' ignored}} 267 } 268 269 // Forbid attributes on decl specifiers. 270 unsigned [[gnu::used]] static int [[gnu::unused]] v1; // expected-error {{'unused' attribute cannot be applied to types}} \ 271 expected-error {{an attribute list cannot appear here}} 272 typedef [[gnu::used]] unsigned long [[gnu::unused]] v2; // expected-error {{'unused' attribute cannot be applied to types}} \ 273 expected-error {{an attribute list cannot appear here}} 274 int [[carries_dependency]] foo(int [[carries_dependency]] x); // expected-error 2{{'carries_dependency' attribute cannot be applied to types}} 275 276 // Forbid [[gnu::...]] attributes on declarator chunks. 277 int *[[gnu::unused]] v3; // expected-warning {{attribute 'unused' ignored}} 278 int v4[2][[gnu::unused]]; // expected-warning {{attribute 'unused' ignored}} 279 int v5()[[gnu::unused]]; // expected-warning {{attribute 'unused' ignored}} 280 281 [[attribute_declaration]]; // expected-warning {{unknown attribute 'attribute_declaration' ignored}} 282 [[noreturn]]; // expected-error {{'noreturn' attribute only applies to functions and methods}} 283 [[carries_dependency]]; // expected-error {{'carries_dependency' attribute only applies to functions, methods, and parameters}} 284
