mirror of
https://github.com/ziglang/zig.git
synced 2025-12-06 06:13:07 +00:00
156ab87500
See: * https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319 * https://discourse.llvm.org/t/rfc-project-hand-in-hand-llvm-libc-libc-code-sharing/77701 We're dropping support for C++03 for Zig due to the first change; it would be insane to ship 1018 duplicate header files just for this outdated use case. As a result of the second change, I had to bring in a subset of the headers from llvm-libc since libc++ now depends on these. Hopefully we can continue to get away with not copying the entirety of llvm-libc.
80 lines
2.6 KiB
C++
Vendored
80 lines
2.6 KiB
C++
Vendored
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// For information see https://libcxx.llvm.org/DesignDocs/TimeZone.html
|
|
|
|
#ifndef _LIBCPP___CHRONO_TIME_ZONE_LINK_H
|
|
#define _LIBCPP___CHRONO_TIME_ZONE_LINK_H
|
|
|
|
#include <version>
|
|
// Enable the contents of the header only when libc++ was built with experimental features enabled.
|
|
#if _LIBCPP_HAS_EXPERIMENTAL_TZDB
|
|
|
|
# include <__compare/strong_order.h>
|
|
# include <__config>
|
|
# include <__utility/private_constructor_tag.h>
|
|
# include <string>
|
|
# include <string_view>
|
|
|
|
# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
# endif
|
|
|
|
_LIBCPP_PUSH_MACROS
|
|
# include <__undef_macros>
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
# if _LIBCPP_STD_VER >= 20 && _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION
|
|
|
|
namespace chrono {
|
|
|
|
class time_zone_link {
|
|
public:
|
|
[[nodiscard]]
|
|
_LIBCPP_HIDE_FROM_ABI explicit time_zone_link(__private_constructor_tag, string_view __name, string_view __target)
|
|
: __name_{__name}, __target_{__target} {}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI time_zone_link(time_zone_link&&) = default;
|
|
_LIBCPP_HIDE_FROM_ABI time_zone_link& operator=(time_zone_link&&) = default;
|
|
|
|
[[nodiscard]] _LIBCPP_HIDE_FROM_ABI string_view name() const noexcept { return __name_; }
|
|
[[nodiscard]] _LIBCPP_HIDE_FROM_ABI string_view target() const noexcept { return __target_; }
|
|
|
|
private:
|
|
string __name_;
|
|
// TODO TZDB instead of the name we can store the pointer to a zone. These
|
|
// pointers are immutable. This makes it possible to directly return a
|
|
// pointer in the time_zone in the 'locate_zone' function.
|
|
string __target_;
|
|
};
|
|
|
|
[[nodiscard]] _LIBCPP_AVAILABILITY_TZDB _LIBCPP_HIDE_FROM_ABI inline bool
|
|
operator==(const time_zone_link& __x, const time_zone_link& __y) noexcept {
|
|
return __x.name() == __y.name();
|
|
}
|
|
|
|
[[nodiscard]] _LIBCPP_AVAILABILITY_TZDB _LIBCPP_HIDE_FROM_ABI inline strong_ordering
|
|
operator<=>(const time_zone_link& __x, const time_zone_link& __y) noexcept {
|
|
return __x.name() <=> __y.name();
|
|
}
|
|
|
|
} // namespace chrono
|
|
|
|
# endif // _LIBCPP_STD_VER >= 20 && _LIBCPP_HAS_TIME_ZONE_DATABASE && _LIBCPP_HAS_FILESYSTEM &&
|
|
// _LIBCPP_HAS_LOCALIZATION
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
_LIBCPP_POP_MACROS
|
|
|
|
#endif // _LIBCPP_HAS_EXPERIMENTAL_TZDB
|
|
|
|
#endif // _LIBCPP___CHRONO_TIME_ZONE_LINK_H
|