derek.holloway
7502bf64a4
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35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
// RUN: %clang_cc1 -ffreestanding -verify=c23 -std=c23 %s
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// RUN: %clang_cc1 -ffreestanding -verify=c17 -std=c17 %s
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// c23-no-diagnostics
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#include <stdatomic.h>
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#define __enable_constant_folding(x) (__builtin_constant_p(x) ? (x) : (x))
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#define __is_same(a, b) (__extension__ _Generic(a, b: 1, default: 0) && __extension__ _Generic(b, a: 1, default: 0))
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#ifndef ATOMIC_CHAR8_T_LOCK_FREE
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#error missing
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#endif
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// c17-error@-2 {{missing}}
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_Static_assert(__is_same(atomic_char8_t, unsigned char _Atomic), "");
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// c17-error@-1 {{use of undeclared identifier 'atomic_char8_t'}}
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// c17-error@-2 {{unknown type name 'atomic_char8_t'}}
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_Static_assert(_Generic(u8"", unsigned char*: 1, char*: 0), "");
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// c17-error@-1 {{static assertion failed}}
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// -fsigned-char is the default
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#define M(X) __enable_constant_folding((X) >= 0x80)
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_Static_assert(M(u8"\U000000E9"[0]), "");
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// c17-error@-1 {{static assertion failed}}
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#if __STDC_VERSION__ >= 202311L
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_Static_assert(M(u8'\xC3'), "");
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#endif
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const char cu8[] = u8"text";
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const signed char scu8[] = u8"text";
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const unsigned char ucu8[] = u8"text";
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