forked from OSchip/llvm-project
73 lines
3.4 KiB
C
73 lines
3.4 KiB
C
// RUN: %clang_cc1 -std=c11 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -fms-compatibility -DMS -fsyntax-only -verify=expected,ms %s
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// RUN: %clang_cc1 -std=c99 -pedantic -fsyntax-only -verify=expected,ext %s
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// RUN: %clang_cc1 -xc++ -std=c++11 -pedantic -fsyntax-only -verify=expected,ext,cxx %s
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_Static_assert("foo", "string is nonzero"); // ext-warning {{'_Static_assert' is a C11 extension}}
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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"); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(0, "0 is nonzero"); // expected-error {{static_assert failed "0 is nonzero"}} \
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// ext-warning {{'_Static_assert' is a C11 extension}}
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#ifdef MS
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static_assert(1, "1 is nonzero"); // ms-warning {{use of 'static_assert' without inclusion of <assert.h> is a Microsoft extension}}
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#endif
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void foo(void) {
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_Static_assert(1, "1 is nonzero"); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(0, "0 is nonzero"); // expected-error {{static_assert failed "0 is nonzero"}} \
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// ext-warning {{'_Static_assert' is a C11 extension}}
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#ifdef MS
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static_assert(1, "1 is nonzero"); // ms-warning {{use of 'static_assert' without}}
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#endif
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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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// ext-warning {{'_Static_assert' is a C11 extension}}
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struct A {
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int a;
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_Static_assert(1, "1 is nonzero"); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(0, "0 is nonzero"); // expected-error {{static_assert failed "0 is nonzero"}} \
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// ext-warning {{'_Static_assert' is a C11 extension}}
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#ifdef MS
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static_assert(1, "1 is nonzero"); // ms-warning {{use of 'static_assert' without}}
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#endif
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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; // ext-warning 3 {{'_Static_assert' is a C11 extension}}
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UNION(char[2], short) u2 = { .one = { 'a', 'b' } }; // ext-warning 3 {{'_Static_assert' is a C11 extension}} cxx-warning {{designated initializers are a C++20 extension}}
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typedef UNION(char, short) U3; // expected-error {{static_assert failed due to requirement 'sizeof(char) == sizeof(short)' "type size mismatch"}} \
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// ext-warning 3 {{'_Static_assert' is a C11 extension}}
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typedef UNION(float, 0.5f) U4; // expected-error {{expected a type}} \
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// ext-warning 3 {{'_Static_assert' is a C11 extension}}
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// After defining the assert macro in MS-compatibility mode, we should
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// no longer warn about including <assert.h> under the assumption the
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// user already did that.
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#ifdef MS
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#define assert(expr)
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static_assert(1, "1 is nonzero"); // ok
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// But we should still warn if the user did something bonkers.
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#undef static_assert
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static_assert(1, "1 is nonzero"); // ms-warning {{use of 'static_assert' without}}
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#endif
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