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