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7e7013c5d4
This change implements the C library dependent portions of P0482R6 (char8_t: A type for UTF-8 characters and strings (Revision 6)) by declaring std::c8rtomb() and std::mbrtoc8() in the <cuchar> header when implementations are provided by the C library as specified by WG14 N2653 (char8_t: A type for UTF-8 characters and strings (Revision 1)) as adopted for C23. A _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 macro is defined by the libc++ __config header unless it is known that the C library provides these functions in the current compilation mode. This macro is used for testing purposes and may be of use to libc++ users. At present, the only C library known to implement these functions is GNU libc as of its 2.36 release. Reviewed By: ldionne Differential Revision: https://reviews.llvm.org/D130946
28 lines
1.1 KiB
C++
28 lines
1.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03
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// The system-provided <uchar.h> seems to be broken on AIX:
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// error: 'error' diagnostics seen but not expected:
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// File /usr/include/uchar.h Line 38: cannot combine with previous 'type-name' declaration specifier
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// File /usr/include/uchar.h Line 39: cannot combine with previous 'type-name' declaration specifier
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// 2 errors generated.
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// XFAIL: LIBCXX-AIX-FIXME
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#include <uchar.h>
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using U = decltype(::c8rtomb);
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using V = decltype(::mbrtoc8);
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#if defined(_LIBCPP_HAS_NO_C8RTOMB_MBRTOC8)
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// expected-error@-3 {{no member named 'c8rtomb' in the global namespace}}
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// expected-error@-3 {{no member named 'mbrtoc8' in the global namespace}}
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#else
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// expected-no-diagnostics
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#endif
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