50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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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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#ifndef _LIBCPP___CHRONO_OSTREAM_H
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#define _LIBCPP___CHRONO_OSTREAM_H
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#include <__chrono/day.h>
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#include <__chrono/statically_widen.h>
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#include <__config>
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#include <format>
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#include <ostream>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
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namespace chrono {
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template <class _CharT, class _Traits>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_FORMAT basic_ostream<_CharT, _Traits>&
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operator<<(basic_ostream<_CharT, _Traits>& __os, const day& __d) {
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return __os
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<< (__d.ok()
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? std::format(_LIBCPP_STATICALLY_WIDEN(_CharT, "{:%d}"), __d)
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// Note this error differs from the wording of the Standard. The
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// Standard wording doesn't work well on AIX or Windows. There
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// the formatted day seems to be either modulo 100 or completely
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// omitted. Judging by the wording this is valid.
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// TODO FMT Write a paper of file an LWG issue.
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: std::format(_LIBCPP_STATICALLY_WIDEN(_CharT, "{:02} is not a valid day"), static_cast<unsigned>(__d)));
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}
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} // namespace chrono
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#endif //if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___CHRONO_OSTREAM_H
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