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// RUN: %clang_cc1 -std=c++2a -verify %s
void *operator new(__SIZE_TYPE__, void*);
// Check that we give a good diagnostic for an attempt to use a postfix
// operator after a unary-expression.
namespace postfix_after_unary {
struct A { int n; };
int &a = new A->n; // expected-error {{expression cannot be followed by a postfix '->' operator; add parentheses}}
struct B { B(int); int operator()(int); };
int n = new (0) (B) (int()) (int()); // expected-error {{cannot be followed by a postfix '(}} expected-error {{not a function or function pointer}}
char x = sizeof(int)["hello"]; // expected-error {{cannot be followed by a postfix '[}}
char y = alignof(int)["hello"]; // expected-error {{cannot be followed by a postfix '[}}
char z = noexcept(0)["hello"]; // expected-error {{cannot be followed by a postfix '[}}
char w = requires { x == x; }["ny"]; // expected-error {{cannot be followed by a postfix '[}}
int f() {
label:
return &&label->n; // expected-error {{cannot be followed by a postfix}} expected-error {{not a structure or union}}
}
char k = sizeof(int) // expected-error {{expected ';'}}
[[noreturn]] void g();
}
// Check that we do parse postfix-expression suffixes after some more unusual
// kinds of postfix-expressions (null literals and builtin calls).
namespace unusual_primary_exprs {
int a = nullptr["foo"]; // expected-error {{array subscript is not an integer}}
int b = __builtin_COLUMN()["sufficiently long string constant"];
int c = __builtin_available(*)["ny"];
static_assert(__null["foo"] == 'f'); // FIXME: Warn about converting __null to integer in array subscripting.
static_assert(__is_standard_layout(int)["ny"] == 'y');
static_assert(__array_rank(int[1][2])["0123"] == '2');
static_assert(__is_lvalue_expr(a)["ny"] == 'y');
}
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