1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 // For information see https://libcxx.llvm.org/DesignDocs/TimeZone.html 11 12 #ifndef _LIBCPP___CHRONO_TZDB_LIST_H 13 #define _LIBCPP___CHRONO_TZDB_LIST_H 14 15 #include <version> 16 // Enable the contents of the header only when libc++ was built with experimental features enabled. 17 #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_TZDB) 18 19 # include <__availability> 20 # include <__chrono/tzdb.h> 21 # include <forward_list> 22 # include <string_view> 23 24 # if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 25 # pragma GCC system_header 26 # endif 27 28 _LIBCPP_BEGIN_NAMESPACE_STD 29 30 # if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM) && \ 31 !defined(_LIBCPP_HAS_NO_LOCALIZATION) 32 33 namespace chrono { 34 35 class _LIBCPP_AVAILABILITY_TZDB tzdb_list { 36 public: 37 _LIBCPP_EXPORTED_FROM_ABI explicit tzdb_list(tzdb&& __tzdb); 38 _LIBCPP_EXPORTED_FROM_ABI ~tzdb_list(); 39 40 tzdb_list(const tzdb_list&) = delete; 41 tzdb_list& operator=(const tzdb_list&) = delete; 42 43 using const_iterator = forward_list<tzdb>::const_iterator; 44 45 _LIBCPP_NODISCARD_EXT _LIBCPP_EXPORTED_FROM_ABI const tzdb& front() const noexcept; 46 47 _LIBCPP_EXPORTED_FROM_ABI const_iterator erase_after(const_iterator __p); 48 49 _LIBCPP_EXPORTED_FROM_ABI tzdb& __emplace_front(tzdb&& __tzdb); 50 51 _LIBCPP_NODISCARD_EXT _LIBCPP_EXPORTED_FROM_ABI const_iterator begin() const noexcept; 52 _LIBCPP_NODISCARD_EXT _LIBCPP_EXPORTED_FROM_ABI const_iterator end() const noexcept; 53 54 _LIBCPP_NODISCARD_EXT _LIBCPP_EXPORTED_FROM_ABI const_iterator cbegin() const noexcept; 55 _LIBCPP_NODISCARD_EXT _LIBCPP_EXPORTED_FROM_ABI const_iterator cend() const noexcept; 56 57 private: 58 class __impl; 59 __impl* __impl_; 60 }; 61 62 _LIBCPP_NODISCARD_EXT _LIBCPP_AVAILABILITY_TZDB _LIBCPP_EXPORTED_FROM_ABI tzdb_list& get_tzdb_list(); 63 64 _LIBCPP_NODISCARD_EXT _LIBCPP_AVAILABILITY_TZDB _LIBCPP_HIDE_FROM_ABI inline const tzdb& get_tzdb() { 65 return get_tzdb_list().front(); 66 } 67 68 _LIBCPP_AVAILABILITY_TZDB _LIBCPP_EXPORTED_FROM_ABI const tzdb& reload_tzdb(); 69 70 _LIBCPP_NODISCARD_EXT _LIBCPP_AVAILABILITY_TZDB _LIBCPP_EXPORTED_FROM_ABI string remote_version(); 71 72 } // namespace chrono 73 74 # endif // _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_TIME_ZONE_DATABASE) && !defined(_LIBCPP_HAS_NO_FILESYSTEM) 75 // && !defined(_LIBCPP_HAS_NO_LOCALIZATION) 76 77 _LIBCPP_END_NAMESPACE_STD 78 79 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_TZDB) 80 81 #endif // _LIBCPP___CHRONO_TZDB_LIST_H 82