[llvm-branch-commits] [libcxx] [libc++][TZDB] Finishes zoned_time member functions. (PR #95026)
Mark de Wever via llvm-branch-commits
llvm-branch-commits at lists.llvm.org
Sun Jul 7 08:33:00 PDT 2024
https://github.com/mordante updated https://github.com/llvm/llvm-project/pull/95026
>From 5195d3905de900a09a9c78ee843c28f0939cdf62 Mon Sep 17 00:00:00 2001
From: Mark de Wever <koraq at xs4all.nl>
Date: Wed, 17 Apr 2024 21:00:22 +0200
Subject: [PATCH] [libc++][TZDB] Finishes zoned_time member functions.
Note the implementation of
zoned_time& operator=(const local_time<Duration>& lt);
is not correct; however the wording cannot be easily implemented. It could
be if the object caches the local_time assigned. However this does not
seem to intended. The current implementation matches MSVC STL and
libstdc++.
Implements parts of:
- P0355 Extending to chrono Calendars and Time Zones
---
libcxx/include/__chrono/zoned_time.h | 22 ++
.../diagnostics/chrono.nodiscard.verify.cpp | 12 +-
.../assign.local_time.pass.cpp | 243 ++++++++++++++++++
.../assign.sys_time.pass.cpp | 136 ++++++++++
.../get_info.pass.cpp | 51 ++++
.../get_local_time.pass.cpp | 133 ++++++++++
.../operator_local_time.pass.cpp | 135 ++++++++++
.../operator_sys_time.pass.cpp | 125 +++++++++
8 files changed, 855 insertions(+), 2 deletions(-)
create mode 100644 libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/assign.local_time.pass.cpp
create mode 100644 libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/assign.sys_time.pass.cpp
create mode 100644 libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/get_info.pass.cpp
create mode 100644 libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/get_local_time.pass.cpp
create mode 100644 libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/operator_local_time.pass.cpp
create mode 100644 libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/operator_sys_time.pass.cpp
diff --git a/libcxx/include/__chrono/zoned_time.h b/libcxx/include/__chrono/zoned_time.h
index 08f7f37603920..101a9f52966ad 100644
--- a/libcxx/include/__chrono/zoned_time.h
+++ b/libcxx/include/__chrono/zoned_time.h
@@ -18,6 +18,7 @@
# include <__chrono/calendar.h>
# include <__chrono/duration.h>
+# include <__chrono/sys_info.h>
# include <__chrono/system_clock.h>
# include <__chrono/time_zone.h>
# include <__chrono/tzdb_list.h>
@@ -147,8 +148,29 @@ class zoned_time {
} && is_convertible_v<sys_time<_Duration2>, sys_time<_Duration>>)
: zoned_time{__traits::locate_zone(__name), __zt, __c} {}
+ _LIBCPP_HIDE_FROM_ABI zoned_time& operator=(const sys_time<_Duration>& __tp) {
+ __tp_ = __tp;
+ return *this;
+ }
+
+ _LIBCPP_HIDE_FROM_ABI zoned_time& operator=(const local_time<_Duration>& __tp) {
+ // TODO TZDB This seems wrong.
+ // Assigning a non-existant or abiguous time will throw and not satisfy
+ // the post condition. This seems quite odd; I constructed an object with
+ // choose::earliest and that choice is not respected.
+ // what did LEWG do with this.
+ // MSVC STL and libstdc++ behave the same
+ __tp_ = __zone_->to_sys(__tp);
+ return *this;
+ }
+
+ [[nodiscard]] _LIBCPP_HIDE_FROM_ABI operator sys_time<duration>() const { return get_sys_time(); }
+ [[nodiscard]] _LIBCPP_HIDE_FROM_ABI explicit operator local_time<duration>() const { return get_local_time(); }
+
[[nodiscard]] _LIBCPP_HIDE_FROM_ABI _TimeZonePtr get_time_zone() const { return __zone_; }
+ [[nodiscard]] _LIBCPP_HIDE_FROM_ABI local_time<duration> get_local_time() const { return __zone_->to_local(__tp_); }
[[nodiscard]] _LIBCPP_HIDE_FROM_ABI sys_time<duration> get_sys_time() const { return __tp_; }
+ [[nodiscard]] _LIBCPP_HIDE_FROM_ABI sys_info get_info() const { return __zone_->get_info(__tp_); }
private:
_TimeZonePtr __zone_;
diff --git a/libcxx/test/libcxx/diagnostics/chrono.nodiscard.verify.cpp b/libcxx/test/libcxx/diagnostics/chrono.nodiscard.verify.cpp
index e8337cb33822e..32a67dc4dc9c4 100644
--- a/libcxx/test/libcxx/diagnostics/chrono.nodiscard.verify.cpp
+++ b/libcxx/test/libcxx/diagnostics/chrono.nodiscard.verify.cpp
@@ -81,7 +81,15 @@ void test() {
{
std::chrono::zoned_time<std::chrono::seconds> zt;
- zt.get_time_zone(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
- zt.get_sys_time(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+
+ // expected-warning at +1 {{ignoring return value of function declared with 'nodiscard' attribute}}
+ static_cast<std::chrono::sys_seconds>(zt);
+ // expected-warning at +1 {{ignoring return value of function declared with 'nodiscard' attribute}}
+ static_cast<std::chrono::local_seconds>(zt);
+
+ zt.get_time_zone(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+ zt.get_local_time(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+ zt.get_sys_time(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+ zt.get_info(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
}
}
diff --git a/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/assign.local_time.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/assign.local_time.pass.cpp
new file mode 100644
index 0000000000000..5e1feb9d7fe9e
--- /dev/null
+++ b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/assign.local_time.pass.cpp
@@ -0,0 +1,243 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-experimental-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// template<class Duration, class TimeZonePtr = const time_zone*>
+// class zoned_time;
+//
+// zoned_time& operator=(const local_time<Duration>& st);
+
+// TODO TZDB Investigate the issues in this test, this seems like
+// a design issue of the class.
+//
+// [time.zone.zonedtime.members]/3
+// Effects: After assignment, get_local_time() == lt.
+// This assignment has no effect on the return value of get_time_zone().
+//
+// The test cases describe the issues.
+
+#include <cassert>
+#include <chrono>
+#include <concepts>
+#include <type_traits>
+
+#include "test_macros.h"
+
+namespace cr = std::chrono;
+
+// Tests unique conversions. To make sure the test is does not depend on changes
+// in the database it uses a time zone with a fixed offset.
+static void test_unique() {
+ // common_type_t<duration, seconds> -> duration
+ {
+ using duration = cr::nanoseconds;
+ using sys_time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{"Etc/GMT+1", sys_time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == sys_time_point{duration{42}});
+ assert(zt.get_local_time() == local_time_point{duration{42} - cr::hours{1}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = local_time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == sys_time_point{duration{99} + cr::hours{1}});
+ assert(zt.get_local_time() == local_time_point{duration{99}});
+ }
+ {
+ using duration = cr::microseconds;
+ using sys_time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{"Etc/GMT+1", sys_time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == sys_time_point{duration{42}});
+ assert(zt.get_local_time() == local_time_point{duration{42} - cr::hours{1}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = local_time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == sys_time_point{duration{99} + cr::hours{1}});
+ assert(zt.get_local_time() == local_time_point{duration{99}});
+ }
+ {
+ using duration = cr::milliseconds;
+ using sys_time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{"Etc/GMT+1", sys_time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == sys_time_point{duration{42}});
+ assert(zt.get_local_time() == local_time_point{duration{42} - cr::hours{1}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = local_time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == sys_time_point{duration{99} + cr::hours{1}});
+ assert(zt.get_local_time() == local_time_point{duration{99}});
+ }
+ // common_type_t<seconds, seconds> -> seconds
+ {
+ using duration = cr::seconds;
+ using sys_time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{"Etc/GMT+1", sys_time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == sys_time_point{duration{42}});
+ assert(zt.get_local_time() == local_time_point{duration{42} - cr::hours{1}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = local_time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == sys_time_point{duration{99} + cr::hours{1}});
+ assert(zt.get_local_time() == local_time_point{duration{99}});
+ }
+ // common_type_t<duration, seconds> -> seconds
+ {
+ using duration = cr::days;
+ using sys_time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{"Etc/GMT+1", sys_time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == cr::sys_seconds{duration{42}});
+ assert(zt.get_local_time() == cr::local_seconds{duration{42} - cr::hours{1}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = local_time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == cr::sys_seconds{duration{99} + cr::hours{1}});
+ assert(zt.get_local_time() == cr::local_seconds{duration{99}});
+ }
+ {
+ using duration = cr::weeks;
+ using sys_time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{"Etc/GMT+1", sys_time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == cr::sys_seconds{duration{42}});
+ assert(zt.get_local_time() == cr::local_seconds{duration{42} - cr::hours{1}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = local_time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == cr::sys_seconds{duration{99} + cr::hours{1}});
+ assert(zt.get_local_time() == cr::local_seconds{duration{99}});
+ }
+ /* This does not work; due to using __tp_ = __zone_->to_sys(__tp);
+ * Here the ambiguous/non-existent exception can't stream months and years,
+ * leading to a compilation error.
+ {
+ using duration = cr::months;
+ using sys_time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{"Etc/GMT+1", sys_time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == cr::sys_seconds{duration{42}});
+ assert(zt.get_local_time() == cr::local_seconds{duration{42} - cr::hours{1}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = local_time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("Etc/GMT+1"));
+ assert(zt.get_sys_time() == cr::sys_seconds{duration{99} + cr::hours{1}});
+ assert(zt.get_local_time() == cr::local_seconds{duration{99}});
+ } */
+}
+
+// Tests non-existant conversions.
+static void test_nonexistent() {
+#ifndef TEST_HAS_NO_EXCEPTIONS
+ using namespace std::literals::chrono_literals;
+
+ const cr::time_zone* tz = cr::locate_zone("Europe/Berlin");
+
+ // Z Europe/Berlin 0:53:28 - LMT 1893 Ap
+ // ...
+ // 1 DE CE%sT 1980
+ // 1 E CE%sT
+ //
+ // ...
+ // R E 1981 ma - Mar lastSu 1u 1 S
+ // R E 1996 ma - O lastSu 1u 0 -
+
+ // Pick an historic date where it's well known what the time zone rules were.
+ // This makes it unlikely updates to the database change these rules.
+ cr::local_time<cr::seconds> time{(cr::sys_days{cr::March / 30 / 1986} + 2h + 30min).time_since_epoch()};
+
+ using duration = cr::seconds;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{tz};
+
+ bool thrown = false;
+ try {
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = time;
+ } catch (const cr::nonexistent_local_time&) {
+ thrown = true;
+ }
+ // There is no system type that can represent the current local time. So the
+ // assertion passes. The current implementation throws an exception too.
+ assert(zt.get_local_time() != time);
+ assert(thrown);
+#endif // TEST_HAS_NO_EXCEPTIONS
+}
+
+// Tests ambiguous conversions.
+static void test_ambiguous() {
+#ifndef TEST_HAS_NO_EXCEPTIONS
+ using namespace std::literals::chrono_literals;
+
+ const cr::time_zone* tz = cr::locate_zone("Europe/Berlin");
+
+ // Z Europe/Berlin 0:53:28 - LMT 1893 Ap
+ // ...
+ // 1 DE CE%sT 1980
+ // 1 E CE%sT
+ //
+ // ...
+ // R E 1981 ma - Mar lastSu 1u 1 S
+ // R E 1996 ma - O lastSu 1u 0 -
+
+ // Pick an historic date where it's well known what the time zone rules were.
+ // This makes it unlikely updates to the database change these rules.
+ cr::local_time<cr::seconds> time{(cr::sys_days{cr::September / 28 / 1986} + 2h + 30min).time_since_epoch()};
+
+ using duration = cr::seconds;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{tz};
+
+ bool thrown = false;
+ try {
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = time;
+ } catch (const cr::ambiguous_local_time&) {
+ thrown = true;
+ }
+ // There is no system type that can represent the current local time. So the
+ // assertion passes. The current implementation throws an exception too.
+ assert(zt.get_local_time() != time);
+ assert(thrown);
+#endif // TEST_HAS_NO_EXCEPTIONS
+}
+
+int main(int, char**) {
+ test_unique();
+ test_nonexistent();
+ test_ambiguous();
+
+ return 0;
+}
diff --git a/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/assign.sys_time.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/assign.sys_time.pass.cpp
new file mode 100644
index 0000000000000..0eeba7a2b1893
--- /dev/null
+++ b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/assign.sys_time.pass.cpp
@@ -0,0 +1,136 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-experimental-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// template<class Duration, class TimeZonePtr = const time_zone*>
+// class zoned_time;
+//
+// zoned_time& operator=(const sys_time<Duration>& st);
+
+#include <cassert>
+#include <chrono>
+#include <concepts>
+#include <type_traits>
+
+namespace cr = std::chrono;
+
+int main(int, char**) {
+ {
+ using duration = cr::nanoseconds;
+ using time_point = cr::sys_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{42}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{99}});
+ }
+ {
+ using duration = cr::microseconds;
+ using time_point = cr::sys_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{42}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{99}});
+ }
+ {
+ using duration = cr::milliseconds;
+ using time_point = cr::sys_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{42}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{99}});
+ }
+ {
+ using duration = cr::seconds;
+ using time_point = cr::sys_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{42}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{99}});
+ }
+ {
+ using duration = cr::days;
+ using time_point = cr::sys_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{42}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{99}});
+ }
+ {
+ using duration = cr::weeks;
+ using time_point = cr::sys_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{42}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{99}});
+ }
+ {
+ using duration = cr::months;
+ using time_point = cr::sys_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{42}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{99}});
+ }
+ {
+ using duration = cr::years;
+ using time_point = cr::sys_time<duration>;
+ using zoned_time = cr::zoned_time<duration>;
+ zoned_time zt{time_point{duration{42}}};
+
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{42}});
+
+ [[maybe_unused]] std::same_as<zoned_time&> decltype(auto) _ = zt = time_point{duration{99}};
+ assert(zt.get_time_zone() == cr::locate_zone("UTC"));
+ assert(zt.get_sys_time() == time_point{duration{99}});
+ }
+
+ return 0;
+}
diff --git a/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/get_info.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/get_info.pass.cpp
new file mode 100644
index 0000000000000..4bce11618a129
--- /dev/null
+++ b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/get_info.pass.cpp
@@ -0,0 +1,51 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-experimental-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// template<class Duration, class TimeZonePtr = const time_zone*>
+// class zoned_time;
+//
+// sys_info get_info() const;
+
+#include <cassert>
+#include <chrono>
+#include <concepts>
+
+namespace cr = std::chrono;
+
+int main(int, char**) {
+ {
+ cr::zoned_time<cr::seconds> zt;
+
+ std::same_as<cr::sys_info> decltype(auto) info = zt.get_info();
+ assert(info.begin == cr::sys_seconds::min());
+ assert(info.end == cr::sys_seconds::max());
+ assert(info.offset == cr::seconds{0});
+ assert(info.save == cr::minutes{0});
+ assert(info.abbrev == "UTC");
+ }
+ {
+ const cr::zoned_time<cr::seconds> zt;
+
+ std::same_as<cr::sys_info> decltype(auto) info = zt.get_info();
+ assert(info.begin == cr::sys_seconds::min());
+ assert(info.end == cr::sys_seconds::max());
+ assert(info.offset == cr::seconds{0});
+ assert(info.save == cr::minutes{0});
+ assert(info.abbrev == "UTC");
+ }
+
+ return 0;
+}
diff --git a/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/get_local_time.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/get_local_time.pass.cpp
new file mode 100644
index 0000000000000..6cad6cf4932e4
--- /dev/null
+++ b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/get_local_time.pass.cpp
@@ -0,0 +1,133 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-experimental-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// template<class Duration, class TimeZonePtr = const time_zone*>
+// class zoned_time;
+//
+// local_time<duration> get_local_time() const;
+
+#include <chrono>
+#include <concepts>
+
+#include "../test_offset_time_zone.h"
+
+namespace cr = std::chrono;
+
+static void test_const_member() {
+ {
+ using duration = cr::nanoseconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = zt.get_local_time();
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::nanoseconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ const cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = zt.get_local_time();
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+}
+
+static void test_duration_conversion() {
+ // common_type_t<duration, seconds> -> duration
+ {
+ using duration = cr::nanoseconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = zt.get_local_time();
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::microseconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = zt.get_local_time();
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::milliseconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = zt.get_local_time();
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ // common_type_t<seconds, seconds> -> seconds
+ {
+ using duration = cr::seconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = zt.get_local_time();
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ // common_type_t<duration, seconds> -> seconds
+ {
+ using duration = cr::days;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<cr::seconds>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = zt.get_local_time();
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::weeks;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<cr::seconds>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = zt.get_local_time();
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::months;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<cr::seconds>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = zt.get_local_time();
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::years;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<cr::seconds>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = zt.get_local_time();
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+}
+
+int main(int, char**) {
+ test_const_member();
+ test_duration_conversion();
+
+ return 0;
+}
diff --git a/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/operator_local_time.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/operator_local_time.pass.cpp
new file mode 100644
index 0000000000000..0e4e47f29c4ce
--- /dev/null
+++ b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/operator_local_time.pass.cpp
@@ -0,0 +1,135 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-experimental-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// template<class Duration, class TimeZonePtr = const time_zone*>
+// class zoned_time;
+//
+// explicit operator local_time<duration>() const;
+
+#include <chrono>
+#include <concepts>
+
+#include "../test_offset_time_zone.h"
+
+namespace cr = std::chrono;
+
+static void test_const_member() {
+ {
+ using duration = cr::nanoseconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ static_assert(!std::is_convertible_v<local_time_point, cr::zoned_time<duration>>);
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = static_cast<local_time_point>(zt);
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::nanoseconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ static_assert(!std::is_convertible_v<local_time_point, const cr::zoned_time<duration>>);
+ const cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = static_cast<local_time_point>(zt);
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+}
+
+static void test_duration_conversion() {
+ // common_type_t<duration, seconds> -> duration
+ {
+ using duration = cr::nanoseconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = static_cast<local_time_point>(zt);
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::microseconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = static_cast<local_time_point>(zt);
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::milliseconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = static_cast<local_time_point>(zt);
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ // common_type_t<seconds, seconds> -> seconds
+ {
+ using duration = cr::seconds;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<duration>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = static_cast<local_time_point>(zt);
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ // common_type_t<duration, seconds> -> seconds
+ {
+ using duration = cr::days;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<cr::seconds>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = static_cast<local_time_point>(zt);
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::weeks;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<cr::seconds>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = static_cast<local_time_point>(zt);
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::months;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<cr::seconds>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = static_cast<local_time_point>(zt);
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+ {
+ using duration = cr::years;
+ using time_point = cr::sys_time<duration>;
+ using local_time_point = cr::local_time<cr::seconds>;
+ cr::zoned_time<duration> zt{"Etc/GMT+1", time_point{duration{42}}};
+
+ std::same_as<local_time_point> decltype(auto) time = static_cast<local_time_point>(zt);
+ assert(time == local_time_point{duration{42} - cr::hours{1}});
+ }
+}
+
+int main(int, char**) {
+ test_const_member();
+ test_duration_conversion();
+
+ return 0;
+}
diff --git a/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/operator_sys_time.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/operator_sys_time.pass.cpp
new file mode 100644
index 0000000000000..327ed495aed1a
--- /dev/null
+++ b/libcxx/test/std/time/time.zone/time.zone.zonedtime/time.zone.zonedtime.members/operator_sys_time.pass.cpp
@@ -0,0 +1,125 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: no-filesystem, no-localization, no-tzdb
+
+// XFAIL: libcpp-has-no-experimental-tzdb
+// XFAIL: availability-tzdb-missing
+
+// <chrono>
+
+// template<class Duration, class TimeZonePtr = const time_zone*>
+// class zoned_time;
+//
+// operator sys_time<duration>() const;
+
+#include <chrono>
+#include <concepts>
+
+#include "../test_offset_time_zone.h"
+
+namespace cr = std::chrono;
+
+static void test_const_member() {
+ {
+ using duration = cr::nanoseconds;
+ using time_point = cr::sys_time<duration>;
+ static_assert(std::is_convertible_v<time_point, cr::zoned_time<duration>>);
+ cr::zoned_time<duration> zt{time_point{duration{42}}};
+
+ std::same_as<time_point> decltype(auto) time = static_cast<time_point>(zt);
+ assert(time == time_point{duration{42}});
+ }
+ {
+ using duration = cr::nanoseconds;
+ using time_point = cr::sys_time<duration>;
+ static_assert(std::is_convertible_v<time_point, const cr::zoned_time<duration>>);
+ const cr::zoned_time<duration> zt{time_point{duration{42}}};
+
+ std::same_as<time_point> decltype(auto) time = static_cast<time_point>(zt);
+ assert(time == time_point{duration{42}});
+ }
+}
+
+static void test_duration_conversion() {
+ // common_type_t<duration, seconds> -> duration
+ {
+ using duration = cr::nanoseconds;
+ using time_point = cr::sys_time<duration>;
+ cr::zoned_time<duration> zt{time_point{duration{42}}};
+
+ std::same_as<time_point> decltype(auto) time = static_cast<time_point>(zt);
+ assert(time == time_point{duration{42}});
+ }
+ {
+ using duration = cr::microseconds;
+ using time_point = cr::sys_time<duration>;
+ cr::zoned_time<duration> zt{time_point{duration{42}}};
+
+ std::same_as<time_point> decltype(auto) time = static_cast<time_point>(zt);
+ assert(time == time_point{duration{42}});
+ }
+ {
+ using duration = cr::milliseconds;
+ using time_point = cr::sys_time<duration>;
+ cr::zoned_time<duration> zt{time_point{duration{42}}};
+
+ std::same_as<time_point> decltype(auto) time = static_cast<time_point>(zt);
+ assert(time == time_point{duration{42}});
+ }
+ // common_type_t<seconds, seconds> -> seconds
+ {
+ using duration = cr::seconds;
+ using time_point = cr::sys_time<duration>;
+ cr::zoned_time<duration> zt{time_point{duration{42}}};
+
+ std::same_as<time_point> decltype(auto) time = static_cast<time_point>(zt);
+ assert(time == time_point{duration{42}});
+ }
+ // common_type_t<duration, seconds> -> seconds
+ {
+ using duration = cr::days;
+ using time_point = cr::sys_time<duration>;
+ cr::zoned_time<duration> zt{time_point{duration{42}}};
+
+ std::same_as<cr::sys_seconds> decltype(auto) time = static_cast<cr::sys_seconds>(zt);
+ assert(time == time_point{duration{42}});
+ }
+ {
+ using duration = cr::weeks;
+ using time_point = cr::sys_time<duration>;
+ cr::zoned_time<duration> zt{time_point{duration{42}}};
+
+ std::same_as<cr::sys_seconds> decltype(auto) time = static_cast<cr::sys_seconds>(zt);
+ assert(time == time_point{duration{42}});
+ }
+ {
+ using duration = cr::months;
+ using time_point = cr::sys_time<duration>;
+ cr::zoned_time<duration> zt{time_point{duration{42}}};
+
+ std::same_as<cr::sys_seconds> decltype(auto) time = static_cast<cr::sys_seconds>(zt);
+ assert(time == time_point{duration{42}});
+ }
+ {
+ using duration = cr::years;
+ using time_point = cr::sys_time<duration>;
+ cr::zoned_time<duration> zt{time_point{duration{42}}};
+
+ std::same_as<cr::sys_seconds> decltype(auto) time = static_cast<cr::sys_seconds>(zt);
+ assert(time == time_point{duration{42}});
+ }
+}
+
+int main(int, char**) {
+ test_const_member();
+ test_duration_conversion();
+
+ return 0;
+}
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