222 lines
8.5 KiB
C++
222 lines
8.5 KiB
C++
// RUN: %clang_cc1 -verify -fsyntax-only -std=c++2a -pedantic-errors -triple x86_64-linux-gnu %s
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// Make sure we know these are legitimate commas and not typos for ';'.
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namespace Commas {
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int a,
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b [[ ]],
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c alignas(double);
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}
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struct S {};
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enum E { e, };
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auto f() -> struct S {
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return S();
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}
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auto g() -> enum E {
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return E();
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}
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namespace EnumBase {
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enum E {};
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// PR19810: The ': E' here is not an enum-base, and the ':' is not a typo for '::'.
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E e = true ? *new enum E : E {};
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// PR45726: This ':' is not an enum-base.
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static_assert(_Generic(e, enum E : int{}, int: 1) == 0); // expected-error {{C11 extension}}
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static_assert(_Generic(1, enum E : int{}, int: 1) == 1); // expected-error {{C11 extension}}
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}
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namespace OpaqueEnumDecl {
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enum E : int; // ok
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// PR44941
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enum E : int n; // expected-error {{non-defining declaration of enumeration with a fixed underlying type is only permitted as a standalone declaration}}
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typedef enum E : int T; // expected-error {{non-defining declaration of enumeration with a fixed underlying type is only permitted as a standalone declaration}}
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typedef enum E : int T; // expected-error {{non-defining declaration of enumeration with a fixed underlying type is only permitted as a standalone declaration}}
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namespace Inner {
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typedef enum E : int T; // expected-error {{non-defining declaration of enumeration with a fixed underlying type is only permitted as a standalone declaration}}
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}
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// GCC incorrectly accepts this one
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using T = enum E : int; // expected-error {{non-defining declaration of enumeration with a fixed underlying type is only permitted as a standalone declaration}}
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// PR19810 comment#2
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int x[sizeof(enum E : int)]; // expected-error {{non-defining declaration of enumeration with a fixed underlying type is only permitted as a standalone declaration}}
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namespace PR24297 {
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enum struct E a; // expected-error {{must use 'enum' not 'enum struct'}}
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enum class F b; // expected-error {{must use 'enum' not 'enum class'}}
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enum G : int c; // expected-error {{only permitted as a standalone declaration}}
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enum struct H : int d; // expected-error {{only permitted as a standalone declaration}}
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enum class I : int e; // expected-error {{only permitted as a standalone declaration}}
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enum X x; // expected-error {{ISO C++ forbids forward reference}} expected-error {{incomplete}} expected-note {{forward declaration}}
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enum struct E *pa; // expected-error {{must use 'enum' not 'enum struct'}}
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enum class F *pb; // expected-error {{must use 'enum' not 'enum class'}}
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enum G : int *pc; // expected-error {{only permitted as a standalone declaration}}
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enum struct H : int *pd; // expected-error {{only permitted as a standalone declaration}}
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enum class I : int *pe; // expected-error {{only permitted as a standalone declaration}}
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enum Y *py; // expected-error {{ISO C++ forbids forward reference}}
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}
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}
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int decltype(f())::*ptr_mem_decltype;
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class ExtraSemiAfterMemFn {
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// Due to a peculiarity in the C++11 grammar, a deleted or defaulted function
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// is permitted to be followed by either one or two semicolons.
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void f() = delete // expected-error {{expected ';' after delete}}
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void g() = delete; // ok
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void h() = delete;; // ok
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void i() = delete;;; // expected-error {{extra ';' after member function definition}}
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};
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int *const const p = 0; // expected-error {{duplicate 'const' declaration specifier}}
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const const int *q = 0; // expected-error {{duplicate 'const' declaration specifier}}
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struct MultiCV {
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void f() const const; // expected-error {{duplicate 'const' declaration specifier}}
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};
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static_assert(something, ""); // expected-error {{undeclared identifier}}
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// PR9903
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struct SS {
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typedef void d() = default; // expected-error {{function definition declared 'typedef'}} expected-error {{only special member functions and comparison operators may be defaulted}}
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};
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using PR14855 = int S::; // expected-error {{expected ';' after alias declaration}}
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// Ensure that 'this' has a const-qualified type in a trailing return type for
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// a constexpr function.
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struct ConstexprTrailingReturn {
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int n;
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constexpr auto f() const -> decltype((n));
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};
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constexpr const int &ConstexprTrailingReturn::f() const { return n; }
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namespace TestIsValidAfterTypeSpecifier {
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struct s {} v;
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struct s
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thread_local tl;
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struct s
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&r0 = v;
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struct s
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&&r1 = s();
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struct s
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bitand r2 = v;
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struct s
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and r3 = s();
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enum E {};
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enum E
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[[]] e;
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}
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namespace PR5066 {
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using T = int (*f)(); // expected-error {{type-id cannot have a name}}
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template<typename T> using U = int (*f)(); // expected-error {{type-id cannot have a name}}
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auto f() -> int (*f)(); // expected-error {{only variables can be initialized}} expected-error {{expected ';'}}
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auto g = []() -> int (*f)() {}; // expected-error {{type-id cannot have a name}}
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}
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namespace FinalOverride {
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struct Base {
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virtual void *f();
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virtual void *g();
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virtual void *h();
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virtual void *i();
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};
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struct Derived : Base {
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virtual auto f() -> void *final;
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virtual auto g() -> void *override;
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virtual auto h() -> void *final override;
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virtual auto i() -> void *override final;
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};
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}
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namespace UsingDeclAttrs {
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using T __attribute__((aligned(1))) = int;
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using T [[gnu::aligned(1)]] = int;
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static_assert(alignof(T) == 1, "");
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using [[gnu::aligned(1)]] T = int; // expected-error {{an attribute list cannot appear here}}
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using T = int [[gnu::aligned(1)]]; // expected-error {{'aligned' attribute cannot be applied to types}}
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}
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namespace DuplicateSpecifier {
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constexpr constexpr int f(); // expected-error {{duplicate 'constexpr' declaration specifier}}
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constexpr int constexpr a = 0; // expected-error {{duplicate 'constexpr' declaration specifier}}
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struct A {
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friend constexpr int constexpr friend f(); // expected-warning {{duplicate 'friend' declaration specifier}} \
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// expected-error {{duplicate 'constexpr' declaration specifier}}
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friend struct A friend; // expected-warning {{duplicate 'friend'}} expected-error {{'friend' must appear first}}
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};
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constinit constexpr int n1 = 0; // expected-error {{cannot combine with previous 'constinit'}}
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constexpr constinit int n2 = 0; // expected-error {{cannot combine with previous 'constexpr'}}
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constinit constinit int n3 = 0; // expected-error {{duplicate 'constinit' declaration specifier}}
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consteval constexpr int f1(); // expected-error {{cannot combine with previous 'consteval'}}
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constexpr consteval int f2(); // expected-error {{cannot combine with previous 'constexpr'}}
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consteval consteval int f3(); // expected-error {{duplicate 'consteval' declaration specifier}}
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constinit consteval int wat = 0; // expected-error {{cannot combine with previous 'constinit'}}
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consteval constinit int huh(); // expected-error {{cannot combine with previous 'consteval'}}
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}
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namespace ColonColonDecltype {
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struct S { struct T {}; };
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::decltype(S())::T invalid; // expected-error {{expected unqualified-id}}
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}
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namespace AliasDeclEndLocation {
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template<typename T> struct A {};
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// Ensure that we correctly determine the end of this declaration to be the
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// end of the annotation token, not the beginning.
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using B = AliasDeclEndLocation::A<int
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> // expected-error {{expected ';' after alias declaration}}
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+;
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using C = AliasDeclEndLocation::A<int
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>\
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> // expected-error {{expected ';' after alias declaration}}
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;
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using D = AliasDeclEndLocation::A<int
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> // expected-error {{expected ';' after alias declaration}}
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// FIXME: After splitting this >> into two > tokens, we incorrectly determine
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// the end of the template-id to be after the *second* '>'.
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using E = AliasDeclEndLocation::A<int>>;
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#define GGG >>>
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using F = AliasDeclEndLocation::A<int GGG;
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// expected-error@-1 {{expected ';' after alias declaration}}
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B something_else;
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}
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class PR47176 {
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friend void f(PR47176, int = 0) noexcept(true) {}
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};
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static_assert(noexcept(f(PR47176())), "");
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struct Base { virtual void f() = 0; virtual void g() = 0; virtual void h() = 0; };
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struct MemberComponentOrder : Base {
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void f() override __asm__("foobar") __attribute__(( )) {}
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void g() __attribute__(( )) override;
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void h() __attribute__(( )) override {}
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};
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void NoMissingSemicolonHere(struct S
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[3]);
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template<int ...N> void NoMissingSemicolonHereEither(struct S
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... [N]);
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// This must be at the end of the file; we used to look ahead past the EOF token here.
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// expected-error@+1 {{expected unqualified-id}} expected-error@+1{{expected ';'}}
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using
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