cxx0x-attributes.cpp revision f7a052732c2b6c82f74708038f75fa92c9b4dba0
1762bb9d0ad20320b9f97a841dce57ba5e8e48b07Richard Smith// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -verify -std=c++11 %s 2bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt 32edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt// Need std::initializer_list 42edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntnamespace std { 52edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt typedef decltype(sizeof(int)) size_t; 62edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 72edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt // libc++'s implementation 82edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt template <class _E> 92edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt class initializer_list 102edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt { 112edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt const _E* __begin_; 122edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt size_t __size_; 132edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 142edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt initializer_list(const _E* __b, size_t __s) 152edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt : __begin_(__b), 162edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt __size_(__s) 172edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt {} 182edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 192edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt public: 202edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt typedef _E value_type; 212edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt typedef const _E& reference; 222edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt typedef const _E& const_reference; 232edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt typedef size_t size_type; 242edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 252edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt typedef const _E* iterator; 262edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt typedef const _E* const_iterator; 272edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 282edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt initializer_list() : __begin_(nullptr), __size_(0) {} 292edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 302edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt size_t size() const {return __size_;} 312edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt const _E* begin() const {return __begin_;} 322edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt const _E* end() const {return __begin_ + __size_;} 332edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt }; 342edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt} 352edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 362edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 37bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt// Declaration syntax checks 38bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt[[]] int before_attr; 39f19076848566cb52a40ddbdb2555c53d12e9a003Peter Collingbourneint [[]] between_attr; 402edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntconst [[]] int between_attr_2 = 0; // expected-error {{an attribute list cannot appear here}} 41bbd37c62e34db3f5a95c899723484a76c71d7757Sean Huntint after_attr [[]]; 42bbd37c62e34db3f5a95c899723484a76c71d7757Sean Huntint * [[]] ptr_attr; 436ee326af4e77e6f05973486097884d7431f2108dRichard Smithint & [[]] ref_attr = after_attr; 446ee326af4e77e6f05973486097884d7431f2108dRichard Smithint && [[]] rref_attr = 0; 45bbd37c62e34db3f5a95c899723484a76c71d7757Sean Huntint array_attr [1] [[]]; 4682d0b0aab9088e977c2a44c4a5a90479c63149fePeter Collingbournealignas(8) int aligned_attr; 476880f492365cc4fa4c941aa83688635003ee7498Michael Han[[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}} 486880f492365cc4fa4c941aa83688635003ee7498Michael Han[[,,,static, class, namespace,, inline, constexpr, mutable,, bitand, bitor::compl(!.*_ Cx.!U^*R),,,]] int more_garbage_attr; // expected-warning {{unknown attribute 'static' ignored}} \ 496880f492365cc4fa4c941aa83688635003ee7498Michael Han // expected-warning {{unknown attribute 'class' ignored}} \ 506880f492365cc4fa4c941aa83688635003ee7498Michael Han // expected-warning {{unknown attribute 'namespace' ignored}} \ 516880f492365cc4fa4c941aa83688635003ee7498Michael Han // expected-warning {{unknown attribute 'inline' ignored}} \ 526880f492365cc4fa4c941aa83688635003ee7498Michael Han // expected-warning {{unknown attribute 'constexpr' ignored}} \ 536880f492365cc4fa4c941aa83688635003ee7498Michael Han // expected-warning {{unknown attribute 'mutable' ignored}} \ 546880f492365cc4fa4c941aa83688635003ee7498Michael Han // expected-warning {{unknown attribute 'bitand' ignored}} \ 556880f492365cc4fa4c941aa83688635003ee7498Michael Han // expected-warning {{unknown attribute 'compl' ignored}} 56c56298d87a9df507805a548d7d515e8b511df2c0Richard Smith[[u8"invalid!"]] int invalid_string_attr; // expected-error {{expected ']'}} 57bbd37c62e34db3f5a95c899723484a76c71d7757Sean Huntvoid fn_attr () [[]]; 586ee326af4e77e6f05973486097884d7431f2108dRichard Smithvoid noexcept_fn_attr () noexcept [[]]; 596ee326af4e77e6f05973486097884d7431f2108dRichard Smithstruct MemberFnOrder { 606ee326af4e77e6f05973486097884d7431f2108dRichard Smith virtual void f() const volatile && noexcept [[]] final = 0; 616ee326af4e77e6f05973486097884d7431f2108dRichard Smith}; 622edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntstruct [[]] struct_attr; 63bbd37c62e34db3f5a95c899723484a76c71d7757Sean Huntclass [[]] class_attr {}; 642edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntunion [[]] union_attr; 652e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han 662e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han// Checks attributes placed at wrong syntactic locations of class specifiers. 672e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Hanclass [[]] [[]] 682e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han attr_after_class_name_decl [[]] [[]]; // expected-error {{an attribute list cannot appear here}} 692e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han 702e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Hanclass [[]] [[]] 712e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han attr_after_class_name_definition [[]] [[]] [[]]{}; // expected-error {{an attribute list cannot appear here}} 722e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han 732e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Hanclass [[]] c {}; 742e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Hanclass c [[]] [[]] x; 752e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Hanclass c [[]] [[]] y [[]] [[]]; 762e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Hanclass c final [(int){0}]; 772e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han 782e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Hanclass base {}; 792e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Hanclass [[]] [[]] final_class 802e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han alignas(float) [[]] final // expected-error {{an attribute list cannot appear here}} 812e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han alignas(float) [[]] [[]] alignas(float): base{}; // expected-error {{an attribute list cannot appear here}} 822e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han 832e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Hanclass [[]] [[]] final_class_another 842e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han [[]] [[]] alignas(16) final // expected-error {{an attribute list cannot appear here}} 852e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han [[]] [[]] alignas(16) [[]]{}; // expected-error {{an attribute list cannot appear here}} 862e39713a3d72c243a2bcd13cc8f5036ba6b487d9Michael Han 872edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt[[]] struct with_init_declarators {} init_declarator; 882edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt[[]] struct no_init_declarators; // expected-error {{an attribute list cannot appear here}} 892edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt[[]]; 902edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntstruct ctordtor { 912edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt [[]] ctordtor(); 922edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt [[]] ~ctordtor(); 932edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt}; 942edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt[[]] ctordtor::ctordtor() {} 952edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt[[]] ctordtor::~ctordtor() {} 96bbd37c62e34db3f5a95c899723484a76c71d7757Sean Huntextern "C++" [[]] int extern_attr; 97bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunttemplate <typename T> [[]] void template_attr (); 983497fdfdb742f55d7b7ec8e22779fb08962b8441Peter Collingbourne[[]] [[]] int [[]] [[]] multi_attr [[]] [[]]; 99bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt 100c56298d87a9df507805a548d7d515e8b511df2c0Richard Smithint comma_attr [[,]]; 101bbd37c62e34db3f5a95c899723484a76c71d7757Sean Huntint scope_attr [[foo::]]; // expected-error {{expected identifier}} 1026ee326af4e77e6f05973486097884d7431f2108dRichard Smithint (paren_attr) [[]]; // expected-error {{an attribute list cannot appear here}} 1032edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntunsigned [[]] int attr_in_decl_spec; // expected-error {{an attribute list cannot appear here}} 1042edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntunsigned [[]] int [[]] const double_decl_spec = 0; // expected-error 2{{an attribute list cannot appear here}} 105bbd37c62e34db3f5a95c899723484a76c71d7757Sean Huntclass foo { 1066ee326af4e77e6f05973486097884d7431f2108dRichard Smith void const_after_attr () [[]] const; // expected-error {{expected ';'}} 107bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt}; 108bbd37c62e34db3f5a95c899723484a76c71d7757Sean Huntextern "C++" [[]] { } // expected-error {{an attribute list cannot appear here}} 109bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt[[]] template <typename T> void before_template_attr (); // expected-error {{an attribute list cannot appear here}} 110282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smith[[]] namespace ns { int i; } // expected-error {{an attribute list cannot appear here}} expected-note {{declared here}} 111bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt[[]] static_assert(true, ""); //expected-error {{an attribute list cannot appear here}} 112bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt[[]] asm(""); // expected-error {{an attribute list cannot appear here}} 113bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt 114bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt[[]] using ns::i; // expected-error {{an attribute list cannot appear here}} 115bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt[[]] using namespace ns; 116bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt 1172edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt[[]] using T = int; // expected-error {{an attribute list cannot appear here}} 1182edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntusing T [[]] = int; // ok 1192edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunttemplate<typename T> using U [[]] = T; 1202edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntusing ns::i [[]]; // expected-error {{an attribute list cannot appear here}} 1212edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntusing [[]] ns::i; // expected-error {{an attribute list cannot appear here}} 1222edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 1232edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntauto trailing() -> [[]] const int; // expected-error {{an attribute list cannot appear here}} 1242edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntauto trailing() -> const [[]] int; // expected-error {{an attribute list cannot appear here}} 1252edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntauto trailing() -> const int [[]]; 1262edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntauto trailing_2() -> struct struct_attr [[]]; 1272edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 1282edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntnamespace N { 1292edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt struct S {}; 1302edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt}; 1312edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunttemplate<typename> struct Template {}; 1322edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 1332edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt// FIXME: Improve this diagnostic 1342edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntstruct [[]] N::S s; // expected-error {{an attribute list cannot appear here}} 1352edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntstruct [[]] Template<int> t; // expected-error {{an attribute list cannot appear here}} 1362edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntstruct [[]] ::template Template<int> u; // expected-error {{an attribute list cannot appear here}} 1372edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunttemplate struct [[]] Template<char>; // expected-error {{an attribute list cannot appear here}} 1382edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunttemplate <> struct [[]] Template<void>; 1392edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 1402edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntenum [[]] E1 {}; 1412edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntenum [[]] E2; // expected-error {{forbids forward references}} 1422edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntenum [[]] E1; 1432edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntenum [[]] E3 : int; 1442edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntenum [[]] { 1452edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt k_123 [[]] = 123 // expected-error {{an attribute list cannot appear here}} 1462edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt}; 1472edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntenum [[]] E1 e; // expected-error {{an attribute list cannot appear here}} 1482edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntenum [[]] class E4 { }; // expected-error {{an attribute list cannot appear here}} 1492edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntenum struct [[]] E5; 1502edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 1512edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntstruct S { 1522edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt friend int f [[]] (); // expected-FIXME{{an attribute list cannot appear here}} 15352b501cd723d56efe3ad2ab708c2b75530fe6caaMichael Han friend int f1 [[noreturn]] (); //expected-error{{an attribute list cannot appear here}} 15452b501cd723d56efe3ad2ab708c2b75530fe6caaMichael Han friend int f2 [[]] [[noreturn]] () {} 15552b501cd723d56efe3ad2ab708c2b75530fe6caaMichael Han [[]] friend int g(); // expected-error{{an attribute list cannot appear here}} 1562edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt [[]] friend int h() { 1572edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt } 15852b501cd723d56efe3ad2ab708c2b75530fe6caaMichael Han [[]] friend int f3(), f4(), f5(); // expected-error{{an attribute list cannot appear here}} 15952b501cd723d56efe3ad2ab708c2b75530fe6caaMichael Han friend int f6 [[noreturn]] (), f7 [[noreturn]] (), f8 [[noreturn]] (); // expected-error3 {{an attribute list cannot appear here}} 1602edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt friend class [[]] C; // expected-error{{an attribute list cannot appear here}} 16152b501cd723d56efe3ad2ab708c2b75530fe6caaMichael Han [[]] friend class D; // expected-error{{an attribute list cannot appear here}} 16252b501cd723d56efe3ad2ab708c2b75530fe6caaMichael Han [[]] friend int; // expected-error{{an attribute list cannot appear here}} 1632edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt}; 1642edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunttemplate<typename T> void tmpl(T) {} 1652edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunttemplate void tmpl [[]] (int); // expected-FIXME {{an attribute list cannot appear here}} 1662edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunttemplate [[]] void tmpl(char); // expected-error {{an attribute list cannot appear here}} 1672edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunttemplate void [[]] tmpl(short); 1682edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 169bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt// Argument tests 17082d0b0aab9088e977c2a44c4a5a90479c63149fePeter Collingbournealignas int aligned_no_params; // expected-error {{expected '('}} 171282e7e66748cc6dd14d6f7f2cb52e5373c531e61Richard Smithalignas(i) int aligned_nonconst; // expected-error {{'aligned' attribute requires integer constant}} expected-note {{read of non-const variable 'i'}} 172bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt 173bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt// Statement tests 174bbd37c62e34db3f5a95c899723484a76c71d7757Sean Huntvoid foo () { 175bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] ; 176bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] { } 177bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] if (0) { } 178bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] for (;;); 179bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] do { 180bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] continue; 181bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt } while (0); 182bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] while (0); 183bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt 184bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] switch (i) { 185bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] case 0: 186bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] default: 187bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] break; 188bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt } 189bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt 190bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] goto there; 191bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] there: 192bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt 193bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] try { 194bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt } [[]] catch (...) { // expected-error {{an attribute list cannot appear here}} 195bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt } 1966ee326af4e77e6f05973486097884d7431f2108dRichard Smith struct S { int arr[2]; } s; 1976ee326af4e77e6f05973486097884d7431f2108dRichard Smith (void)s.arr[ [] { return 0; }() ]; // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}} 1986ee326af4e77e6f05973486097884d7431f2108dRichard Smith int n = __builtin_offsetof(S, arr[ [] { return 0; }() ]); // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}} 1996ee326af4e77e6f05973486097884d7431f2108dRichard Smith 2006ce48a70ace62eb0eaf7b2769d05c5f13b7c7b6cRichard Smith void bar [[noreturn]] ([[]] int i, [[]] int j); 2016ce48a70ace62eb0eaf7b2769d05c5f13b7c7b6cRichard Smith using FuncType = void ([[]] int); 2026ce48a70ace62eb0eaf7b2769d05c5f13b7c7b6cRichard Smith void baz([[]]...); // expected-error {{expected parameter declarator}} 2036ce48a70ace62eb0eaf7b2769d05c5f13b7c7b6cRichard Smith 204bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt [[]] return; 205bbd37c62e34db3f5a95c899723484a76c71d7757Sean Hunt} 206c56298d87a9df507805a548d7d515e8b511df2c0Richard Smith 207c56298d87a9df507805a548d7d515e8b511df2c0Richard Smithtemplate<typename...Ts> void variadic() { 208c56298d87a9df507805a548d7d515e8b511df2c0Richard Smith void bar [[noreturn...]] (); // expected-error {{attribute 'noreturn' cannot be used as an attribute pack}} 209c56298d87a9df507805a548d7d515e8b511df2c0Richard Smith} 2102edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 2112edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt// Expression tests 2122edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntvoid bar () { 2132edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt [] () [[noreturn]] { return; } (); // expected-error {{should not return}} 2142edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt [] () [[noreturn]] { throw; } (); 2152edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt new int[42][[]][5][[]]{}; 2162edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt} 2172edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 2182edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt// Condition tests 2192edf0a2520313cde900799b1eb9bd11c9c776afeSean Huntvoid baz () { 2202edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt if ([[]] bool b = true) { 2212edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt switch ([[]] int n { 42 }) { 2222edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt default: 2232edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt for ([[]] int n = 0; [[]] char b = n < 5; ++b) { 2242edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt } 2252edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt } 2262edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt } 2272edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt int x; 2282edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt // An attribute can be applied to an expression-statement, such as the first 2292edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt // statement in a for. But it can't be applied to a condition which is an 2302edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt // expression. 2312edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt for ([[]] x = 0; ; ) {} // expected-error {{an attribute list cannot appear here}} 2322edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt for (; [[]] x < 5; ) {} // expected-error {{an attribute list cannot appear here}} 2332edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt while ([[]] bool k { false }) { 2342edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt } 2352edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt while ([[]] true) { // expected-error {{an attribute list cannot appear here}} 2362edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt } 2372edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt do { 2382edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt } while ([[]] false); // expected-error {{an attribute list cannot appear here}} 2392edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt 2402edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt for ([[]] int n : { 1, 2, 3 }) { 2412edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt } 2422edf0a2520313cde900799b1eb9bd11c9c776afeSean Hunt} 2431e12b3d777b36b80527da566192f8aeefad8f9d4John McCall 2441e12b3d777b36b80527da566192f8aeefad8f9d4John McCallenum class __attribute__((visibility("hidden"))) SecretKeepers { 2451e12b3d777b36b80527da566192f8aeefad8f9d4John McCall one, /* rest are deprecated */ two, three 2461e12b3d777b36b80527da566192f8aeefad8f9d4John McCall}; 2471e12b3d777b36b80527da566192f8aeefad8f9d4John McCallenum class [[]] EvenMoreSecrets {}; 2486880f492365cc4fa4c941aa83688635003ee7498Michael Han 2496880f492365cc4fa4c941aa83688635003ee7498Michael Hannamespace arguments { 250f7a052732c2b6c82f74708038f75fa92c9b4dba0Richard Smith void f[[gnu::format(printf, 1, 2)]](const char*, ...); 2516880f492365cc4fa4c941aa83688635003ee7498Michael Han void g() [[unknown::foo(currently arguments of attributes from unknown namespace other than 'gnu' namespace are ignored... blah...)]]; // expected-warning {{unknown attribute 'foo' ignored}} 2526880f492365cc4fa4c941aa83688635003ee7498Michael Han} 253f64231e9f47234826fbcdc3b4fe0370ef6c9961dMichael Han 254f7a052732c2b6c82f74708038f75fa92c9b4dba0Richard Smith// Forbid attributes on decl specifiers. 255f64231e9f47234826fbcdc3b4fe0370ef6c9961dMichael Hanunsigned [[gnu::used]] static int [[gnu::unused]] v1; // expected-warning {{attribute 'unused' ignored, because it is not attached to a declaration}} \ 256f64231e9f47234826fbcdc3b4fe0370ef6c9961dMichael Han expected-error {{an attribute list cannot appear here}} 257f64231e9f47234826fbcdc3b4fe0370ef6c9961dMichael Hantypedef [[gnu::used]] unsigned long [[gnu::unused]] v2; // expected-warning {{attribute 'unused' ignored, because it is not attached to a declaration}} \ 258f64231e9f47234826fbcdc3b4fe0370ef6c9961dMichael Han expected-error {{an attribute list cannot appear here}} 259f64231e9f47234826fbcdc3b4fe0370ef6c9961dMichael Hanint [[carries_dependency]] foo(int [[carries_dependency]] x); // expected-warning 2{{attribute 'carries_dependency' ignored, because it is not attached to a declaration}} 260f7a052732c2b6c82f74708038f75fa92c9b4dba0Richard Smith 261f7a052732c2b6c82f74708038f75fa92c9b4dba0Richard Smith// Forbid [[gnu::...]] attributes on declarator chunks. 262f7a052732c2b6c82f74708038f75fa92c9b4dba0Richard Smithint *[[gnu::unused]] v3; // expected-warning {{attribute 'unused' ignored}} 263f7a052732c2b6c82f74708038f75fa92c9b4dba0Richard Smithint v4[2][[gnu::unused]]; // expected-warning {{attribute 'unused' ignored}} 264f7a052732c2b6c82f74708038f75fa92c9b4dba0Richard Smithint v5()[[gnu::unused]]; // expected-warning {{attribute 'unused' ignored}} 265