1*0fca6ea1SDimitry Andric // -*- C++ -*- 2*0fca6ea1SDimitry Andric //===----------------------------------------------------------------------===// 3*0fca6ea1SDimitry Andric // 4*0fca6ea1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5*0fca6ea1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6*0fca6ea1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7*0fca6ea1SDimitry Andric // 8*0fca6ea1SDimitry Andric //===----------------------------------------------------------------------===// 9*0fca6ea1SDimitry Andric 10*0fca6ea1SDimitry Andric // For information see https://libcxx.llvm.org/DesignDocs/TimeZone.html 11*0fca6ea1SDimitry Andric 12*0fca6ea1SDimitry Andric #ifndef _LIBCPP___CHRONO_TIME_ZONE_LINK_H 13*0fca6ea1SDimitry Andric #define _LIBCPP___CHRONO_TIME_ZONE_LINK_H 14*0fca6ea1SDimitry Andric 15*0fca6ea1SDimitry Andric #include <version> 16*0fca6ea1SDimitry Andric // Enable the contents of the header only when libc++ was built with experimental features enabled. 17*0fca6ea1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_TZDB) 18*0fca6ea1SDimitry Andric 19*0fca6ea1SDimitry Andric # include <__compare/strong_order.h> 20*0fca6ea1SDimitry Andric # include <__config> 21*0fca6ea1SDimitry Andric # include <__utility/private_constructor_tag.h> 22*0fca6ea1SDimitry Andric # include <string> 23*0fca6ea1SDimitry Andric # include <string_view> 24*0fca6ea1SDimitry Andric 25*0fca6ea1SDimitry Andric # if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 26*0fca6ea1SDimitry Andric # pragma GCC system_header 27*0fca6ea1SDimitry Andric # endif 28*0fca6ea1SDimitry Andric 29*0fca6ea1SDimitry Andric _LIBCPP_PUSH_MACROS 30*0fca6ea1SDimitry Andric # include <__undef_macros> 31*0fca6ea1SDimitry Andric 32*0fca6ea1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 33*0fca6ea1SDimitry Andric 34*0fca6ea1SDimitry Andric # if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM) && \ 35*0fca6ea1SDimitry Andric !defined(_LIBCPP_HAS_NO_LOCALIZATION) 36*0fca6ea1SDimitry Andric 37*0fca6ea1SDimitry Andric namespace chrono { 38*0fca6ea1SDimitry Andric 39*0fca6ea1SDimitry Andric class time_zone_link { 40*0fca6ea1SDimitry Andric public: 41*0fca6ea1SDimitry Andric [[nodiscard]] time_zone_link(__private_constructor_tag,string_view __name,string_view __target)42*0fca6ea1SDimitry Andric _LIBCPP_HIDE_FROM_ABI explicit time_zone_link(__private_constructor_tag, string_view __name, string_view __target) 43*0fca6ea1SDimitry Andric : __name_{__name}, __target_{__target} {} 44*0fca6ea1SDimitry Andric 45*0fca6ea1SDimitry Andric _LIBCPP_HIDE_FROM_ABI time_zone_link(time_zone_link&&) = default; 46*0fca6ea1SDimitry Andric _LIBCPP_HIDE_FROM_ABI time_zone_link& operator=(time_zone_link&&) = default; 47*0fca6ea1SDimitry Andric name()48*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI string_view name() const noexcept { return __name_; } target()49*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI string_view target() const noexcept { return __target_; } 50*0fca6ea1SDimitry Andric 51*0fca6ea1SDimitry Andric private: 52*0fca6ea1SDimitry Andric string __name_; 53*0fca6ea1SDimitry Andric // TODO TZDB instead of the name we can store the pointer to a zone. These 54*0fca6ea1SDimitry Andric // pointers are immutable. This makes it possible to directly return a 55*0fca6ea1SDimitry Andric // pointer in the time_zone in the 'locate_zone' function. 56*0fca6ea1SDimitry Andric string __target_; 57*0fca6ea1SDimitry Andric }; 58*0fca6ea1SDimitry Andric 59*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_AVAILABILITY_TZDB _LIBCPP_HIDE_FROM_ABI inline bool 60*0fca6ea1SDimitry Andric operator==(const time_zone_link& __x, const time_zone_link& __y) noexcept { 61*0fca6ea1SDimitry Andric return __x.name() == __y.name(); 62*0fca6ea1SDimitry Andric } 63*0fca6ea1SDimitry Andric 64*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_AVAILABILITY_TZDB _LIBCPP_HIDE_FROM_ABI inline strong_ordering 65*0fca6ea1SDimitry Andric operator<=>(const time_zone_link& __x, const time_zone_link& __y) noexcept { 66*0fca6ea1SDimitry Andric return __x.name() <=> __y.name(); 67*0fca6ea1SDimitry Andric } 68*0fca6ea1SDimitry Andric 69*0fca6ea1SDimitry Andric } // namespace chrono 70*0fca6ea1SDimitry Andric 71*0fca6ea1SDimitry Andric # endif //_LIBCPP_STD_VER >= 20 72*0fca6ea1SDimitry Andric 73*0fca6ea1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 74*0fca6ea1SDimitry Andric 75*0fca6ea1SDimitry Andric _LIBCPP_POP_MACROS 76*0fca6ea1SDimitry Andric 77*0fca6ea1SDimitry Andric #endif // !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_TZDB) 78*0fca6ea1SDimitry Andric 79*0fca6ea1SDimitry Andric #endif // _LIBCPP___CHRONO_TIME_ZONE_LINK_H 80