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[libc++][TZDB] Adds local_info formatter. (llvm#86256)
This adds the local_info type and its formatting options. The usage of the local_info object will be done in separate patches. Implements parts of: - P0355 Extending to Calendars and Time Zones - P1361 Integration of chrono with text formatting
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| // -*- 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 | ||
| // | ||
| //===----------------------------------------------------------------------===// | ||
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| // For information see https://libcxx.llvm.org/DesignDocs/TimeZone.html | ||
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| #ifndef _LIBCPP___CHRONO_LOCAL_INFO_H | ||
| #define _LIBCPP___CHRONO_LOCAL_INFO_H | ||
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| #include <version> | ||
| // Enable the contents of the header only when libc++ was built with experimental features enabled. | ||
| #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_TZDB) | ||
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| # include <__chrono/sys_info.h> | ||
| # include <__config> | ||
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| # if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) | ||
| # pragma GCC system_header | ||
| # endif | ||
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| _LIBCPP_BEGIN_NAMESPACE_STD | ||
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| # if _LIBCPP_STD_VER >= 20 | ||
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| namespace chrono { | ||
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| struct local_info { | ||
| static constexpr int unique = 0; | ||
| static constexpr int nonexistent = 1; | ||
| static constexpr int ambiguous = 2; | ||
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| int result; | ||
| sys_info first; | ||
| sys_info second; | ||
| }; | ||
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| } // namespace chrono | ||
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| # endif // _LIBCPP_STD_VER >= 20 | ||
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| _LIBCPP_END_NAMESPACE_STD | ||
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| #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_TZDB) | ||
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| #endif // _LIBCPP___CHRONO_LOCAL_INFO_H |
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114 changes: 114 additions & 0 deletions
114
libcxx/test/libcxx/time/time.zone/time.zone.info/time.zone.info.local/ostream.pass.cpp
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| //===----------------------------------------------------------------------===// | ||
| // | ||
| // 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 | ||
| // | ||
| //===----------------------------------------------------------------------===// | ||
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| // UNSUPPORTED: c++03, c++11, c++14, c++17 | ||
| // UNSUPPORTED: no-localization | ||
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| // TODO FMT This test should not require std::to_chars(floating-point) | ||
| // XFAIL: availability-fp_to_chars-missing | ||
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| // XFAIL: libcpp-has-no-incomplete-tzdb | ||
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| // <chrono> | ||
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| // template<class charT, class traits> | ||
| // basic_ostream<charT, traits>& | ||
| // operator<<(basic_ostream<charT, traits>& os, const local_info& r); | ||
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| // [time.zone.info.local] | ||
| // 7 Effects: Streams out the local_info object r in an unspecified format. | ||
| // 8 Returns: os. | ||
| // | ||
| // Tests the output produced by this function. | ||
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| #include <cassert> | ||
| #include <chrono> | ||
| #include <memory> | ||
| #include <sstream> | ||
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| #include "assert_macros.h" | ||
| #include "test_macros.h" | ||
| #include "make_string.h" | ||
| #include "concat_macros.h" | ||
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| #define SV(S) MAKE_STRING_VIEW(CharT, S) | ||
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| template <class CharT> | ||
| static void test(std::basic_string_view<CharT> expected, std::chrono::local_info&& info) { | ||
| std::basic_stringstream<CharT> sstr; | ||
| sstr << info; | ||
| std::basic_string<CharT> output = sstr.str(); | ||
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| TEST_REQUIRE(expected == output, | ||
| TEST_WRITE_CONCATENATED("\nExpected output ", expected, "\nActual output ", output, '\n')); | ||
| } | ||
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| template <class CharT> | ||
| static void test() { | ||
| using namespace std::literals::chrono_literals; | ||
| namespace tz = std::chrono; | ||
| // result values matching the "known" results | ||
| test(SV("unique: " | ||
| "{[-10484-10-16 15:30:08, 14423-03-17 15:30:07) 00:00:00 0min \"TZ\", " | ||
| "[1970-01-01 00:00:00, 1970-01-01 00:00:00) 00:00:00 0min \"\"}"), | ||
| tz::local_info{tz::local_info::unique, | ||
| tz::sys_info{tz::sys_seconds::min(), tz::sys_seconds::max(), 0s, 0min, "TZ"}, | ||
| tz::sys_info{}}); | ||
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| test(SV("non-existent: " | ||
| "{[1970-01-01 00:00:00, 2038-12-31 00:00:00) 12:23:45 -67min \"NEG\", " | ||
| "[1970-01-01 00:00:00, 2038-12-31 00:00:00) -12:23:45 67min \"POS\"}"), | ||
| tz::local_info{ | ||
| tz::local_info::nonexistent, | ||
| tz::sys_info{static_cast<tz::sys_days>(tz::year_month_day{1970y, tz::January, 1d}), | ||
| static_cast<tz::sys_days>(tz::year_month_day{2038y, tz::December, 31d}), | ||
| 12h + 23min + 45s, | ||
| -67min, | ||
| "NEG"}, | ||
| tz::sys_info{static_cast<tz::sys_days>(tz::year_month_day{1970y, tz::January, 1d}), | ||
| static_cast<tz::sys_days>(tz::year_month_day{2038y, tz::December, 31d}), | ||
| -(12h + 23min + 45s), | ||
| 67min, | ||
| "POS"}}); | ||
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| test(SV("ambiguous: " | ||
| "{[1970-01-01 00:00:00, 2038-12-31 00:00:00) 12:23:45 -67min \"NEG\", " | ||
| "[1970-01-01 00:00:00, 2038-12-31 00:00:00) -12:23:45 67min \"POS\"}"), | ||
| tz::local_info{ | ||
| tz::local_info::ambiguous, | ||
| tz::sys_info{static_cast<tz::sys_days>(tz::year_month_day{1970y, tz::January, 1d}), | ||
| static_cast<tz::sys_days>(tz::year_month_day{2038y, tz::December, 31d}), | ||
| 12h + 23min + 45s, | ||
| -67min, | ||
| "NEG"}, | ||
| tz::sys_info{static_cast<tz::sys_days>(tz::year_month_day{1970y, tz::January, 1d}), | ||
| static_cast<tz::sys_days>(tz::year_month_day{2038y, tz::December, 31d}), | ||
| -(12h + 23min + 45s), | ||
| 67min, | ||
| "POS"}}); | ||
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| // result values not matching the "known" results | ||
| test( | ||
| SV("unspecified result (-1): " | ||
| "{[-10484-10-16 15:30:08, 14423-03-17 15:30:07) 00:00:00 0min \"TZ\", " | ||
| "[1970-01-01 00:00:00, 1970-01-01 00:00:00) 00:00:00 0min \"\"}"), | ||
| tz::local_info{-1, tz::sys_info{tz::sys_seconds::min(), tz::sys_seconds::max(), 0s, 0min, "TZ"}, tz::sys_info{}}); | ||
| test(SV("unspecified result (3): " | ||
| "{[-10484-10-16 15:30:08, 14423-03-17 15:30:07) 00:00:00 0min \"TZ\", " | ||
| "[1970-01-01 00:00:00, 1970-01-01 00:00:00) 00:00:00 0min \"\"}"), | ||
| tz::local_info{3, tz::sys_info{tz::sys_seconds::min(), tz::sys_seconds::max(), 0s, 0min, "TZ"}, tz::sys_info{}}); | ||
| } | ||
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| int main(int, const char**) { | ||
| test<char>(); | ||
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS | ||
| test<wchar_t>(); | ||
| #endif | ||
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| return 0; | ||
| } |
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