384 lines
16 KiB
C++
384 lines
16 KiB
C++
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -verify -std=c++11 -Wc++14-compat -Wc++14-extensions -Wc++17-extensions %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 & [[unknown]] ref_attr_2 = after_attr; // expected-warning {{unknown attribute 'unknown' ignored}}
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int & [[noreturn]] ref_attr_3 = after_attr; // expected-error {{'noreturn' attribute cannot be applied to types}}
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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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enum [[]] E { };
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namespace test_misplacement {
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[[]] struct struct_attr2; //expected-error{{misplaced attributes}}
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[[]] class class_attr2; //expected-error{{misplaced attributes}}
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[[]] union union_attr2; //expected-error{{misplaced attributes}}
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[[]] enum E2 { }; //expected-error{{misplaced attributes}}
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}
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// Checks attributes placed at wrong syntactic locations of class specifiers.
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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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// The diagnostics here don't matter much, this just shouldn't crash:
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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}}
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class D final alignas ([l) {}]{}); // expected-error {{expected ',' or ']' in lambda capture list}} 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 {{misplaced attributes}}
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template<typename> [[]] struct no_init_declarators_template; // expected-error {{an attribute list cannot appear here}}
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void fn_with_structs() {
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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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[[]];
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struct ctordtor {
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[[]] ctordtor [[]] () [[]];
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ctordtor (C) [[]];
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[[]] ~ctordtor [[]] () [[]];
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};
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[[]] ctordtor::ctordtor [[]] () [[]] {}
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[[]] ctordtor::ctordtor (C) [[]] try {} catch (...) {}
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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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[[unknown]] using namespace ns; // expected-warning {{unknown attribute 'unknown' ignored}}
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[[noreturn]] using namespace ns; // expected-error {{'noreturn' attribute only applies to functions}}
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namespace [[]] ns2 {} // expected-warning {{attributes on a namespace declaration are a C++17 extension}}
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using [[]] alignas(4) [[]] ns::i; // expected-error {{an attribute list cannot appear here}}
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using [[]] alignas(4) [[]] foobar = int; // expected-error {{an attribute list cannot appear here}} expected-error {{'alignas' attribute only applies to}}
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void bad_attributes_in_do_while() {
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do {} while (
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[[ns::i); // expected-error {{expected ']'}} \
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// expected-note {{to match this '['}} \
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// expected-error {{expected expression}}
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do {} while (
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[[a]b ns::i); // expected-error {{expected ']'}} \
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// expected-note {{to match this '['}} \
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// expected-error {{expected expression}}
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do {} while (
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[[ab]ab] ns::i); // expected-error {{an attribute list cannot appear here}}
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do {} while ( // expected-note {{to match this '('}}
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alignas(4 ns::i; // expected-note {{to match this '('}}
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} // expected-error 2{{expected ')'}} expected-error {{expected expression}}
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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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using T [[unknown]] = int; // expected-warning {{unknown attribute 'unknown' ignored}}
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using T [[noreturn]] = int; // expected-error {{'noreturn' attribute only applies to functions}}
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using V = int; // expected-note {{previous}}
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using V [[gnu::vector_size(16)]] = int; // expected-error {{redefinition with different types}}
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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-warning {{attributes on an enumerator declaration are a C++17 extension}}
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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 f1 [[noreturn]] (); //expected-error{{an attribute list cannot appear here}}
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friend int f2 [[]] [[noreturn]] () {}
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[[]] friend int g(); // expected-error{{an attribute list cannot appear here}}
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[[]] friend int h() {
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}
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[[]] friend int f3(), f4(), f5(); // expected-error{{an attribute list cannot appear here}}
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friend int f6 [[noreturn]] (), f7 [[noreturn]] (), f8 [[noreturn]] (); // expected-error3 {{an attribute list cannot appear here}}
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friend class [[]] C; // expected-error{{an attribute list cannot appear here}}
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[[]] friend class D; // expected-error{{an attribute list cannot appear here}}
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[[]] friend int; // 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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// FIXME: GCC accepts [[gnu::noreturn]] on a lambda, even though it appertains
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// to the operator()'s type, and GCC does not otherwise accept attributes
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// applied to types. Use that to test this.
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[] () [[gnu::noreturn]] { return; } (); // expected-warning {{attribute 'noreturn' ignored}} FIXME-error {{should not return}}
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[] () [[gnu::noreturn]] { throw; } (); // expected-warning {{attribute 'noreturn' ignored}}
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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 ([[unknown]] bool b = true) { // expected-warning {{unknown attribute 'unknown' ignored}}
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switch ([[unknown]] int n { 42 }) { // expected-warning {{unknown attribute 'unknown' ignored}}
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default:
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for ([[unknown]] int n = 0; [[unknown]] char b = n < 5; ++b) { // expected-warning 2{{unknown attribute 'unknown' ignored}}
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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 ([[unknown]] int n : { 1, 2, 3 }) { // expected-warning {{unknown attribute 'unknown' ignored}}
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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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void f[[gnu::format(printf, 1, 2)]](const char*, ...);
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void g() [[unknown::foo(ignore arguments for unknown attributes, even with symbols!)]]; // expected-warning {{unknown attribute 'foo' ignored}}
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[[deprecated("with argument")]] int i;
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// expected-warning@-1 {{use of the 'deprecated' attribute is a C++14 extension}}
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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-error {{'unused' attribute cannot be applied to types}} \
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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-error {{'unused' attribute cannot be applied to types}} \
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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-error 2{{'carries_dependency' attribute cannot be applied to types}}
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// Forbid [[gnu::...]] attributes on declarator chunks.
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int *[[gnu::unused]] v3; // expected-warning {{attribute 'unused' ignored}}
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int v4[2][[gnu::unused]]; // expected-warning {{attribute 'unused' ignored}}
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int v5()[[gnu::unused]]; // expected-warning {{attribute 'unused' ignored}}
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[[attribute_declaration]]; // expected-warning {{unknown attribute 'attribute_declaration' ignored}}
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[[noreturn]]; // expected-error {{'noreturn' attribute only applies to functions}}
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[[carries_dependency]]; // expected-error {{'carries_dependency' attribute only applies to parameters, Objective-C methods, and functions}}
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class A {
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A([[gnu::unused]] int a);
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};
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A::A([[gnu::unused]] int a) {}
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namespace GccConst {
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// GCC's tokenizer treats const and __const as the same token.
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[[gnu::const]] int *f1();
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[[gnu::__const]] int *f2();
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[[gnu::__const__]] int *f3();
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void f(const int *);
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void g() { f(f1()); f(f2()); }
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void h() { f(f3()); }
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}
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namespace GccASan {
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__attribute__((no_address_safety_analysis)) void f1();
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__attribute__((no_sanitize_address)) void f2();
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[[gnu::no_address_safety_analysis]] void f3();
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[[gnu::no_sanitize_address]] void f4();
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}
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namespace {
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[[deprecated]] void bar();
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// expected-warning@-1 {{use of the 'deprecated' attribute is a C++14 extension}}
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[[deprecated("hello")]] void baz();
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// expected-warning@-1 {{use of the 'deprecated' attribute is a C++14 extension}}
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[[deprecated()]] void foo();
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// expected-error@-1 {{parentheses must be omitted if 'deprecated' attribute's argument list is empty}}
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[[gnu::deprecated()]] void quux();
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}
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namespace {
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[[ // expected-error {{expected ']'}}
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#pragma pack(pop)
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deprecated
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]] void bad();
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}
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int fallthru(int n) {
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switch (n) {
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case 0:
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n += 5;
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[[fallthrough]]; // expected-warning {{use of the 'fallthrough' attribute is a C++17 extension}}
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case 1:
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n *= 2;
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break;
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}
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return n;
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}
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#define attr_name bitand
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#define attr_name_2(x) x
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#define attr_name_3(x, y) x##y
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[[attr_name, attr_name_2(bitor), attr_name_3(com, pl)]] int macro_attrs; // expected-warning {{unknown attribute 'compl' ignored}} \
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expected-warning {{unknown attribute 'bitor' ignored}} \
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expected-warning {{unknown attribute 'bitand' ignored}}
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// Check that we can parse an attribute in our vendor namespace.
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[[clang::annotate("test")]] void annotate1();
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[[_Clang::annotate("test")]] void annotate2();
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// Note: __clang__ is a predefined macro, which is why _Clang is the
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// prefered "protected" vendor namespace. We support __clang__ only for
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// people expecting it to behave the same as __gnu__.
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[[__clang__::annotate("test")]] void annotate3(); // expected-warning {{'__clang__' is a predefined macro name, not an attribute scope specifier; did you mean '_Clang' instead?}}
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