57 lines
2.2 KiB
C++
57 lines
2.2 KiB
C++
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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -std=c++11 -verify %s
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// Error cases.
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[[gnu::this_attribute_does_not_exist]] int unknown_attr;
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// expected-warning@-1 {{unknown attribute 'this_attribute_does_not_exist' ignored}}
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int [[gnu::unused]] attr_on_type;
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// expected-error@-1 {{'unused' attribute cannot be applied to types}}
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int *[[gnu::unused]] attr_on_ptr;
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// expected-warning@-1 {{attribute 'unused' ignored, because it cannot be applied to a type}}
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// Valid cases.
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void aliasb [[gnu::alias("_Z6alias1v")]] ();
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void alias1() {}
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void aliasa [[gnu::alias("_Z6alias1v")]] ();
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[[gnu::aligned(8)]] int aligned;
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void aligned_fn [[gnu::aligned(32)]] ();
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struct [[gnu::aligned(8)]] aligned_struct {};
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[[gnu::malloc, gnu::alloc_size(1,2)]] void *alloc_size(int a, int b);
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void always_inline [[gnu::always_inline]] ();
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__thread int tls_model [[gnu::tls_model("local-exec")]];
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void cleanup(int *p) {
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int n [[gnu::cleanup(cleanup)]];
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}
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void deprecated1 [[gnu::deprecated]] (); // expected-note {{here}}
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[[gnu::deprecated("custom message")]] void deprecated2(); // expected-note {{here}}
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void deprecated3() {
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deprecated1(); // expected-warning {{deprecated}}
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deprecated2(); // expected-warning {{custom message}}
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}
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[[gnu::naked(1,2,3)]] void naked(); // expected-error {{takes no arguments}}
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void nonnull [[gnu::nonnull]] (); // expected-warning {{applied to function with no pointer arguments}}
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// [[gnu::noreturn]] appertains to a declaration, and marks the innermost
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// function declarator in that declaration as being noreturn.
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int noreturn [[gnu::noreturn]]; // expected-warning {{'noreturn' only applies to function types}}
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int noreturn_fn_1();
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int noreturn_fn_2() [[gnu::noreturn]]; // expected-warning {{cannot be applied to a type}}
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int noreturn_fn_3 [[gnu::noreturn]] ();
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[[gnu::noreturn]] int noreturn_fn_4();
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int (*noreturn_fn_ptr_1 [[gnu::noreturn]])() = &noreturn_fn_1; // expected-error {{cannot initialize}}
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int (*noreturn_fn_ptr_2 [[gnu::noreturn]])() = &noreturn_fn_3;
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[[gnu::noreturn]] int (*noreturn_fn_ptr_3)() = &noreturn_fn_1; // expected-error {{cannot initialize}}
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[[gnu::noreturn]] int (*noreturn_fn_ptr_4)() = &noreturn_fn_3;
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struct [[gnu::packed]] packed { char c; int n; };
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static_assert(sizeof(packed) == sizeof(char) + sizeof(int), "not packed");
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