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