43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
// RUN: %clang_cc1 -std=c11 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -xc++ -std=c++11 -fsyntax-only -verify %s
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_Static_assert("foo", "string is nonzero");
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#ifndef __cplusplus
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// expected-error@-2 {{static_assert expression is not an integral constant expression}}
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#endif
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_Static_assert(1, "1 is nonzero");
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_Static_assert(0, "0 is nonzero"); // expected-error {{static_assert failed "0 is nonzero"}}
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void foo(void) {
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_Static_assert(1, "1 is nonzero");
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_Static_assert(0, "0 is nonzero"); // expected-error {{static_assert failed "0 is nonzero"}}
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}
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_Static_assert(1, invalid); // expected-error {{expected string literal for diagnostic message in static_assert}}
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struct A {
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int a;
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_Static_assert(1, "1 is nonzero");
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_Static_assert(0, "0 is nonzero"); // expected-error {{static_assert failed "0 is nonzero"}}
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};
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#ifdef __cplusplus
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#define ASSERT_IS_TYPE(T) __is_same(T, T)
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#else
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#define ASSERT_IS_TYPE(T) __builtin_types_compatible_p(T, T)
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#endif
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#define UNION(T1, T2) union { \
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__typeof__(T1) one; \
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__typeof__(T2) two; \
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_Static_assert(ASSERT_IS_TYPE(T1), "T1 is not a type"); \
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_Static_assert(ASSERT_IS_TYPE(T2), "T2 is not a type"); \
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_Static_assert(sizeof(T1) == sizeof(T2), "type size mismatch"); \
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}
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typedef UNION(unsigned, struct A) U1;
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UNION(char[2], short) u2 = { .one = { 'a', 'b' } };
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typedef UNION(char, short) U3; // expected-error {{static_assert failed "type size mismatch"}}
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typedef UNION(float, 0.5f) U4; // expected-error {{expected a type}}
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