forked from OSchip/llvm-project
256 lines
9.9 KiB
C++
256 lines
9.9 KiB
C++
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -verify -std=c++11 %s
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// Need std::initializer_list
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namespace std {
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typedef decltype(sizeof(int)) size_t;
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// libc++'s implementation
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template <class _E>
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class initializer_list
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{
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const _E* __begin_;
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size_t __size_;
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initializer_list(const _E* __b, size_t __s)
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: __begin_(__b),
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__size_(__s)
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{}
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public:
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typedef _E value_type;
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typedef const _E& reference;
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typedef const _E& const_reference;
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typedef size_t size_type;
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typedef const _E* iterator;
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typedef const _E* const_iterator;
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initializer_list() : __begin_(nullptr), __size_(0) {}
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size_t size() const {return __size_;}
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const _E* begin() const {return __begin_;}
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const _E* end() const {return __begin_ + __size_;}
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};
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}
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// Declaration syntax checks
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[[]] int before_attr;
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int [[]] between_attr;
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const [[]] int between_attr_2 = 0; // expected-error {{an attribute list cannot appear here}}
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int after_attr [[]];
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int * [[]] ptr_attr;
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int & [[]] ref_attr = after_attr;
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int && [[]] rref_attr = 0;
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int array_attr [1] [[]];
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alignas(8) int aligned_attr;
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[[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}}
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[[,,,static, class, namespace,, inline, constexpr, mutable,, bitand, bitor::compl(!.*_ Cx.!U^*R),,,]] int more_garbage_attr; // expected-warning {{unknown attribute 'static' ignored}} \
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// expected-warning {{unknown attribute 'class' ignored}} \
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// expected-warning {{unknown attribute 'namespace' ignored}} \
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// expected-warning {{unknown attribute 'inline' ignored}} \
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// expected-warning {{unknown attribute 'constexpr' ignored}} \
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// expected-warning {{unknown attribute 'mutable' ignored}} \
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// expected-warning {{unknown attribute 'bitand' ignored}} \
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// expected-warning {{unknown attribute 'compl' ignored}}
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[[u8"invalid!"]] int invalid_string_attr; // expected-error {{expected ']'}}
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void fn_attr () [[]];
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void noexcept_fn_attr () noexcept [[]];
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struct MemberFnOrder {
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virtual void f() const volatile && noexcept [[]] final = 0;
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};
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struct [[]] struct_attr;
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class [[]] class_attr {};
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union [[]] union_attr;
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// Checks attributes placed at wrong syntactic locations of class specifiers.
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// FIXME: provide fix-it hint.
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class [[]] [[]]
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attr_after_class_name_decl [[]] [[]]; // expected-error {{an attribute list cannot appear here}}
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class [[]] [[]]
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attr_after_class_name_definition [[]] [[]] [[]]{}; // expected-error {{an attribute list cannot appear here}}
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class [[]] c {};
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class c [[]] [[]] x;
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class c [[]] [[]] y [[]] [[]];
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class c final [(int){0}];
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class base {};
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class [[]] [[]] final_class
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alignas(float) [[]] final // expected-error {{an attribute list cannot appear here}}
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alignas(float) [[]] [[]] alignas(float): base{}; // expected-error {{an attribute list cannot appear here}}
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class [[]] [[]] final_class_another
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[[]] [[]] alignas(16) final // expected-error {{an attribute list cannot appear here}}
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[[]] [[]] alignas(16) [[]]{}; // expected-error {{an attribute list cannot appear here}}
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[[]] struct with_init_declarators {} init_declarator;
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[[]] struct no_init_declarators; // expected-error {{an attribute list cannot appear here}}
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[[]];
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struct ctordtor {
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[[]] ctordtor();
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[[]] ~ctordtor();
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};
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[[]] ctordtor::ctordtor() {}
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[[]] ctordtor::~ctordtor() {}
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extern "C++" [[]] int extern_attr;
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template <typename T> [[]] void template_attr ();
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[[]] [[]] int [[]] [[]] multi_attr [[]] [[]];
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int comma_attr [[,]];
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int scope_attr [[foo::]]; // expected-error {{expected identifier}}
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int (paren_attr) [[]]; // expected-error {{an attribute list cannot appear here}}
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unsigned [[]] int attr_in_decl_spec; // expected-error {{an attribute list cannot appear here}}
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unsigned [[]] int [[]] const double_decl_spec = 0; // expected-error 2{{an attribute list cannot appear here}}
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class foo {
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void const_after_attr () [[]] const; // expected-error {{expected ';'}}
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};
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extern "C++" [[]] { } // expected-error {{an attribute list cannot appear here}}
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[[]] template <typename T> void before_template_attr (); // expected-error {{an attribute list cannot appear here}}
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[[]] namespace ns { int i; } // expected-error {{an attribute list cannot appear here}} expected-note {{declared here}}
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[[]] static_assert(true, ""); //expected-error {{an attribute list cannot appear here}}
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[[]] asm(""); // expected-error {{an attribute list cannot appear here}}
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[[]] using ns::i; // expected-error {{an attribute list cannot appear here}}
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[[]] using namespace ns;
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[[]] using T = int; // expected-error {{an attribute list cannot appear here}}
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using T [[]] = int; // ok
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template<typename T> using U [[]] = T;
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using ns::i [[]]; // expected-error {{an attribute list cannot appear here}}
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using [[]] ns::i; // expected-error {{an attribute list cannot appear here}}
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auto trailing() -> [[]] const int; // expected-error {{an attribute list cannot appear here}}
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auto trailing() -> const [[]] int; // expected-error {{an attribute list cannot appear here}}
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auto trailing() -> const int [[]];
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auto trailing_2() -> struct struct_attr [[]];
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namespace N {
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struct S {};
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};
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template<typename> struct Template {};
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// FIXME: Improve this diagnostic
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struct [[]] N::S s; // expected-error {{an attribute list cannot appear here}}
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struct [[]] Template<int> t; // expected-error {{an attribute list cannot appear here}}
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struct [[]] ::template Template<int> u; // expected-error {{an attribute list cannot appear here}}
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template struct [[]] Template<char>; // expected-error {{an attribute list cannot appear here}}
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template <> struct [[]] Template<void>;
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enum [[]] E1 {};
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enum [[]] E2; // expected-error {{forbids forward references}}
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enum [[]] E1;
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enum [[]] E3 : int;
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enum [[]] {
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k_123 [[]] = 123 // expected-error {{an attribute list cannot appear here}}
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};
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enum [[]] E1 e; // expected-error {{an attribute list cannot appear here}}
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enum [[]] class E4 { }; // expected-error {{an attribute list cannot appear here}}
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enum struct [[]] E5;
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struct S {
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friend int f [[]] (); // expected-FIXME{{an attribute list cannot appear here}}
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[[]] friend int g(); // expected-FIXME{{an attribute list cannot appear here}}
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[[]] friend int h() {
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}
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friend class [[]] C; // expected-error{{an attribute list cannot appear here}}
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};
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template<typename T> void tmpl(T) {}
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template void tmpl [[]] (int); // expected-FIXME {{an attribute list cannot appear here}}
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template [[]] void tmpl(char); // expected-error {{an attribute list cannot appear here}}
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template void [[]] tmpl(short);
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// Argument tests
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alignas int aligned_no_params; // expected-error {{expected '('}}
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alignas(i) int aligned_nonconst; // expected-error {{'aligned' attribute requires integer constant}} expected-note {{read of non-const variable 'i'}}
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// Statement tests
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void foo () {
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[[]] ;
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[[]] { }
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[[]] if (0) { }
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[[]] for (;;);
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[[]] do {
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[[]] continue;
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} while (0);
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[[]] while (0);
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[[]] switch (i) {
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[[]] case 0:
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[[]] default:
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[[]] break;
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}
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[[]] goto there;
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[[]] there:
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[[]] try {
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} [[]] catch (...) { // expected-error {{an attribute list cannot appear here}}
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}
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struct S { int arr[2]; } s;
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(void)s.arr[ [] { return 0; }() ]; // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}}
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int n = __builtin_offsetof(S, arr[ [] { return 0; }() ]); // expected-error {{C++11 only allows consecutive left square brackets when introducing an attribute}}
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void bar [[noreturn]] ([[]] int i, [[]] int j);
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using FuncType = void ([[]] int);
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void baz([[]]...); // expected-error {{expected parameter declarator}}
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[[]] return;
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}
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template<typename...Ts> void variadic() {
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void bar [[noreturn...]] (); // expected-error {{attribute 'noreturn' cannot be used as an attribute pack}}
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}
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// Expression tests
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void bar () {
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[] () [[noreturn]] { return; } (); // expected-error {{should not return}}
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[] () [[noreturn]] { throw; } ();
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new int[42][[]][5][[]]{};
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}
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// Condition tests
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void baz () {
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if ([[]] bool b = true) {
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switch ([[]] int n { 42 }) {
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default:
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for ([[]] int n = 0; [[]] char b = n < 5; ++b) {
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}
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}
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}
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int x;
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// An attribute can be applied to an expression-statement, such as the first
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// statement in a for. But it can't be applied to a condition which is an
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// expression.
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for ([[]] x = 0; ; ) {} // expected-error {{an attribute list cannot appear here}}
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for (; [[]] x < 5; ) {} // expected-error {{an attribute list cannot appear here}}
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while ([[]] bool k { false }) {
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}
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while ([[]] true) { // expected-error {{an attribute list cannot appear here}}
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}
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do {
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} while ([[]] false); // expected-error {{an attribute list cannot appear here}}
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for ([[]] int n : { 1, 2, 3 }) {
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}
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}
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enum class __attribute__((visibility("hidden"))) SecretKeepers {
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one, /* rest are deprecated */ two, three
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};
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enum class [[]] EvenMoreSecrets {};
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namespace arguments {
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// FIXME: remove the sema warnings after migrating existing gnu attributes to c++11 syntax.
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void f(const char*, ...) [[gnu::format(printf, 1, 2)]]; // expected-warning {{unknown attribute 'format' ignored}}
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void g() [[unknown::foo(currently arguments of attributes from unknown namespace other than 'gnu' namespace are ignored... blah...)]]; // expected-warning {{unknown attribute 'foo' ignored}}
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}
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// forbid attributes on decl specifiers
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unsigned [[gnu::used]] static int [[gnu::unused]] v1; // expected-warning {{attribute 'unused' ignored, because it is not attached to a declaration}} \
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expected-error {{an attribute list cannot appear here}}
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typedef [[gnu::used]] unsigned long [[gnu::unused]] v2; // expected-warning {{attribute 'unused' ignored, because it is not attached to a declaration}} \
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expected-error {{an attribute list cannot appear here}}
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int [[carries_dependency]] foo(int [[carries_dependency]] x); // expected-warning 2{{attribute 'carries_dependency' ignored, because it is not attached to a declaration}}
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