39 lines · cpp
1// RUN: %clang_cc1 -std=c++2a -verify %s2 3void *operator new(__SIZE_TYPE__, void*);4 5// Check that we give a good diagnostic for an attempt to use a postfix6// operator after a unary-expression.7namespace postfix_after_unary {8 struct A { int n; };9 int &a = new A->n; // expected-error {{expression cannot be followed by a postfix '->' operator; add parentheses}}10 11 struct B { B(int); int operator()(int); };12 int n = new (0) (B) (int()) (int()); // expected-error {{cannot be followed by a postfix '(}} expected-error {{not a function or function pointer}}13 14 char x = sizeof(int)["hello"]; // expected-error {{cannot be followed by a postfix '[}}15 char y = alignof(int)["hello"]; // expected-error {{cannot be followed by a postfix '[}}16 char z = noexcept(0)["hello"]; // expected-error {{cannot be followed by a postfix '[}}17 char w = requires { x == x; }["ny"]; // expected-error {{cannot be followed by a postfix '[}}18 19 int f() {20 label:21 return &&label->n; // expected-error {{cannot be followed by a postfix}} expected-error {{not a structure or union}}22 }23 24 char k = sizeof(int) // expected-error {{expected ';'}}25 [[noreturn]] void g();26}27 28// Check that we do parse postfix-expression suffixes after some more unusual29// kinds of postfix-expressions (null literals and builtin calls).30namespace unusual_primary_exprs {31 int a = nullptr["foo"]; // expected-error {{array subscript is not an integer}}32 int b = __builtin_COLUMN()["sufficiently long string constant"];33 int c = __builtin_available(*)["ny"];34 static_assert(__null["foo"] == 'f'); // FIXME: Warn about converting __null to integer in array subscripting.35 static_assert(__is_standard_layout(int)["ny"] == 'y');36 static_assert(__array_rank(int[1][2])["0123"] == '2');37 static_assert(__is_lvalue_expr(a)["ny"] == 'y');38}39