[libcxx-commits] [libcxx] [libc++][chrono] Fixes format output of negative values. (PR #89408)
Mark de Wever via libcxx-commits
libcxx-commits at lists.llvm.org
Sun Apr 21 03:37:50 PDT 2024
https://github.com/mordante updated https://github.com/llvm/llvm-project/pull/89408
>From d37de3bbae631f503a7b5a63504facfcb7d01fb0 Mon Sep 17 00:00:00 2001
From: Mark de Wever <koraq at xs4all.nl>
Date: Tue, 16 Apr 2024 20:57:19 +0200
Subject: [PATCH 1/2] [libc++][chrono] Fixes format output of negative values.
The negative values were shown as
1900-01-01 00:01:39.-00000001
after the changes they are shown as
1900-01-01 00:01:39.999999999
---
libcxx/include/__chrono/formatter.h | 3 ++
.../time.clock.file/ostream.pass.cpp | 54 +++++++++++++++++++
.../time.clock.local/ostream.pass.cpp | 54 +++++++++++++++++++
.../sys_time.ostream.pass.cpp | 54 +++++++++++++++++++
4 files changed, 165 insertions(+)
diff --git a/libcxx/include/__chrono/formatter.h b/libcxx/include/__chrono/formatter.h
index 226fccbee6d133..058e9ac97bc941 100644
--- a/libcxx/include/__chrono/formatter.h
+++ b/libcxx/include/__chrono/formatter.h
@@ -88,6 +88,9 @@ __format_sub_seconds(basic_stringstream<_CharT>& __sstr, const chrono::duration<
using __duration = chrono::duration<_Rep, _Period>;
auto __fraction = __value - chrono::duration_cast<chrono::seconds>(__value);
+ // Converts a negative fraction to its positive value.
+ if (__value < chrono::seconds{0})
+ __fraction += chrono::seconds{1};
if constexpr (chrono::treat_as_floating_point_v<_Rep>)
// When the floating-point value has digits itself they are ignored based
// on the wording in [tab:time.format.spec]
diff --git a/libcxx/test/std/time/time.clock/time.clock.file/ostream.pass.cpp b/libcxx/test/std/time/time.clock/time.clock.file/ostream.pass.cpp
index 18a4506b91566b..99d56002e9c391 100644
--- a/libcxx/test/std/time/time.clock/time.clock.file/ostream.pass.cpp
+++ b/libcxx/test/std/time/time.clock/time.clock.file/ostream.pass.cpp
@@ -71,6 +71,24 @@ template <class CharT>
static void test_c() {
using namespace std::literals::chrono_literals;
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-946'688'523'123'456'789ns}) ==
+ SV("1940-01-01 22:57:56.876543211"));
+
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::microseconds>{-946'688'523'123'456us}) ==
+ SV("1940-01-01 22:57:56.876544"));
+
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
+ SV("1940-01-01 22:57:56.877"));
+
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-1ns}) ==
+ SV("1969-12-31 23:59:59.999999999"));
+
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{0ns}) ==
+ SV("1970-01-01 00:00:00.000000000"));
+
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{1ns}) ==
+ SV("1970-01-01 00:00:00.000000001"));
+
assert(stream_c_locale<CharT>(file_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03.123456789"));
assert(stream_c_locale<CharT>(file_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
@@ -107,6 +125,24 @@ template <class CharT>
static void test_fr_FR() {
using namespace std::literals::chrono_literals;
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-946'688'523'123'456'789ns}) ==
+ SV("1940-01-01 22:57:56,876543211"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::microseconds>{-946'688'523'123'456us}) ==
+ SV("1940-01-01 22:57:56,876544"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
+ SV("1940-01-01 22:57:56,877"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-1ns}) ==
+ SV("1969-12-31 23:59:59,999999999"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{0ns}) ==
+ SV("1970-01-01 00:00:00,000000000"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{1ns}) ==
+ SV("1970-01-01 00:00:00,000000001"));
+
assert(stream_fr_FR_locale<CharT>(file_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03,123456789"));
assert(stream_fr_FR_locale<CharT>(file_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
@@ -144,6 +180,24 @@ template <class CharT>
static void test_ja_JP() {
using namespace std::literals::chrono_literals;
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-946'688'523'123'456'789ns}) ==
+ SV("1940-01-01 22:57:56.876543211"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::microseconds>{-946'688'523'123'456us}) ==
+ SV("1940-01-01 22:57:56.876544"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
+ SV("1940-01-01 22:57:56.877"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-1ns}) ==
+ SV("1969-12-31 23:59:59.999999999"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{0ns}) ==
+ SV("1970-01-01 00:00:00.000000000"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{1ns}) ==
+ SV("1970-01-01 00:00:00.000000001"));
+
assert(stream_ja_JP_locale<CharT>(file_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03.123456789"));
assert(stream_ja_JP_locale<CharT>(file_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
diff --git a/libcxx/test/std/time/time.clock/time.clock.local/ostream.pass.cpp b/libcxx/test/std/time/time.clock/time.clock.local/ostream.pass.cpp
index 9fdef8d5adc782..6ec63a14fbbd33 100644
--- a/libcxx/test/std/time/time.clock/time.clock.local/ostream.pass.cpp
+++ b/libcxx/test/std/time/time.clock/time.clock.local/ostream.pass.cpp
@@ -64,6 +64,24 @@ template <class CharT>
static void test_c() {
using namespace std::literals::chrono_literals;
+ assert(stream_c_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{-946'688'523'123'456'789ns}) ==
+ SV("1940-01-01 22:57:56.876543211"));
+
+ assert(stream_c_locale<CharT>(std::chrono::local_time<std::chrono::microseconds>{-946'688'523'123'456us}) ==
+ SV("1940-01-01 22:57:56.876544"));
+
+ assert(stream_c_locale<CharT>(std::chrono::local_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
+ SV("1940-01-01 22:57:56.877"));
+
+ assert(stream_c_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{-1ns}) ==
+ SV("1969-12-31 23:59:59.999999999"));
+
+ assert(stream_c_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{0ns}) ==
+ SV("1970-01-01 00:00:00.000000000"));
+
+ assert(stream_c_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{1ns}) ==
+ SV("1970-01-01 00:00:00.000000001"));
+
assert(stream_c_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03.123456789"));
assert(stream_c_locale<CharT>(std::chrono::local_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
@@ -97,6 +115,24 @@ template <class CharT>
static void test_fr_FR() {
using namespace std::literals::chrono_literals;
+ assert(stream_fr_FR_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{-946'688'523'123'456'789ns}) ==
+ SV("1940-01-01 22:57:56,876543211"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::local_time<std::chrono::microseconds>{-946'688'523'123'456us}) ==
+ SV("1940-01-01 22:57:56,876544"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::local_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
+ SV("1940-01-01 22:57:56,877"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{-1ns}) ==
+ SV("1969-12-31 23:59:59,999999999"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{0ns}) ==
+ SV("1970-01-01 00:00:00,000000000"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{1ns}) ==
+ SV("1970-01-01 00:00:00,000000001"));
+
assert(stream_fr_FR_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03,123456789"));
assert(stream_fr_FR_locale<CharT>(std::chrono::local_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
@@ -131,6 +167,24 @@ template <class CharT>
static void test_ja_JP() {
using namespace std::literals::chrono_literals;
+ assert(stream_ja_JP_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{-946'688'523'123'456'789ns}) ==
+ SV("1940-01-01 22:57:56.876543211"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::local_time<std::chrono::microseconds>{-946'688'523'123'456us}) ==
+ SV("1940-01-01 22:57:56.876544"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::local_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
+ SV("1940-01-01 22:57:56.877"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{-1ns}) ==
+ SV("1969-12-31 23:59:59.999999999"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{0ns}) ==
+ SV("1970-01-01 00:00:00.000000000"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{1ns}) ==
+ SV("1970-01-01 00:00:00.000000001"));
+
assert(stream_ja_JP_locale<CharT>(std::chrono::local_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03.123456789"));
assert(stream_ja_JP_locale<CharT>(std::chrono::local_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
diff --git a/libcxx/test/std/time/time.clock/time.clock.system/sys_time.ostream.pass.cpp b/libcxx/test/std/time/time.clock/time.clock.system/sys_time.ostream.pass.cpp
index 78d8da57c150a6..e596ddefde51d9 100644
--- a/libcxx/test/std/time/time.clock/time.clock.system/sys_time.ostream.pass.cpp
+++ b/libcxx/test/std/time/time.clock/time.clock.system/sys_time.ostream.pass.cpp
@@ -64,6 +64,24 @@ template <class CharT>
static void test_c() {
using namespace std::literals::chrono_literals;
+ assert(stream_c_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{-946'688'523'123'456'789ns}) ==
+ SV("1940-01-01 22:57:56.876543211"));
+
+ assert(stream_c_locale<CharT>(std::chrono::sys_time<std::chrono::microseconds>{-946'688'523'123'456us}) ==
+ SV("1940-01-01 22:57:56.876544"));
+
+ assert(stream_c_locale<CharT>(std::chrono::sys_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
+ SV("1940-01-01 22:57:56.877"));
+
+ assert(stream_c_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{-1ns}) ==
+ SV("1969-12-31 23:59:59.999999999"));
+
+ assert(stream_c_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{0ns}) ==
+ SV("1970-01-01 00:00:00.000000000"));
+
+ assert(stream_c_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{1ns}) ==
+ SV("1970-01-01 00:00:00.000000001"));
+
assert(stream_c_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03.123456789"));
assert(stream_c_locale<CharT>(std::chrono::sys_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
@@ -92,6 +110,24 @@ template <class CharT>
static void test_fr_FR() {
using namespace std::literals::chrono_literals;
+ assert(stream_fr_FR_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{-946'688'523'123'456'789ns}) ==
+ SV("1940-01-01 22:57:56,876543211"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::sys_time<std::chrono::microseconds>{-946'688'523'123'456us}) ==
+ SV("1940-01-01 22:57:56,876544"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::sys_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
+ SV("1940-01-01 22:57:56,877"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{-1ns}) ==
+ SV("1969-12-31 23:59:59,999999999"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{0ns}) ==
+ SV("1970-01-01 00:00:00,000000000"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{1ns}) ==
+ SV("1970-01-01 00:00:00,000000001"));
+
assert(stream_fr_FR_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03,123456789"));
assert(stream_fr_FR_locale<CharT>(std::chrono::sys_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
@@ -120,6 +156,24 @@ template <class CharT>
static void test_ja_JP() {
using namespace std::literals::chrono_literals;
+ assert(stream_ja_JP_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{-946'688'523'123'456'789ns}) ==
+ SV("1940-01-01 22:57:56.876543211"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::sys_time<std::chrono::microseconds>{-946'688'523'123'456us}) ==
+ SV("1940-01-01 22:57:56.876544"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::sys_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
+ SV("1940-01-01 22:57:56.877"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{-1ns}) ==
+ SV("1969-12-31 23:59:59.999999999"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{0ns}) ==
+ SV("1970-01-01 00:00:00.000000000"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{1ns}) ==
+ SV("1970-01-01 00:00:00.000000001"));
+
assert(stream_ja_JP_locale<CharT>(std::chrono::sys_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03.123456789"));
assert(stream_ja_JP_locale<CharT>(std::chrono::sys_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
>From 6df06f41e9b7fc446e6e75d80fa1f7e1b92d7413 Mon Sep 17 00:00:00 2001
From: Mark de Wever <koraq at xs4all.nl>
Date: Sun, 21 Apr 2024 12:37:31 +0200
Subject: [PATCH 2/2] Fixes another corner case.
---
libcxx/include/__chrono/formatter.h | 2 +-
.../time.clock.file/ostream.pass.cpp | 55 +++++++++++++++++++
2 files changed, 56 insertions(+), 1 deletion(-)
diff --git a/libcxx/include/__chrono/formatter.h b/libcxx/include/__chrono/formatter.h
index 058e9ac97bc941..e9b81c3de8a700 100644
--- a/libcxx/include/__chrono/formatter.h
+++ b/libcxx/include/__chrono/formatter.h
@@ -89,7 +89,7 @@ __format_sub_seconds(basic_stringstream<_CharT>& __sstr, const chrono::duration<
auto __fraction = __value - chrono::duration_cast<chrono::seconds>(__value);
// Converts a negative fraction to its positive value.
- if (__value < chrono::seconds{0})
+ if (__value < chrono::seconds{0} && __fraction != __duration{0})
__fraction += chrono::seconds{1};
if constexpr (chrono::treat_as_floating_point_v<_Rep>)
// When the floating-point value has digits itself they are ignored based
diff --git a/libcxx/test/std/time/time.clock/time.clock.file/ostream.pass.cpp b/libcxx/test/std/time/time.clock/time.clock.file/ostream.pass.cpp
index 99d56002e9c391..11eab1dddfe385 100644
--- a/libcxx/test/std/time/time.clock/time.clock.file/ostream.pass.cpp
+++ b/libcxx/test/std/time/time.clock/time.clock.file/ostream.pass.cpp
@@ -80,6 +80,15 @@ static void test_c() {
assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
SV("1940-01-01 22:57:56.877"));
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-1000000000ns}) ==
+ SV("1969-12-31 23:59:59.000000000"));
+
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::microseconds>{-1000000us}) ==
+ SV("1969-12-31 23:59:59.000000"));
+
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{-1000ms}) ==
+ SV("1969-12-31 23:59:59.000"));
+
assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-1ns}) ==
SV("1969-12-31 23:59:59.999999999"));
@@ -89,8 +98,18 @@ static void test_c() {
assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{1ns}) ==
SV("1970-01-01 00:00:00.000000001"));
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{1000000000ns}) ==
+ SV("1970-01-01 00:00:01.000000000"));
+
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::microseconds>{1000000us}) ==
+ SV("1970-01-01 00:00:01.000000"));
+
+ assert(stream_c_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{1000ms}) ==
+ SV("1970-01-01 00:00:01.000"));
+
assert(stream_c_locale<CharT>(file_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03.123456789"));
+
assert(stream_c_locale<CharT>(file_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
SV("2000-01-01 01:02:03.123456"));
@@ -134,6 +153,15 @@ static void test_fr_FR() {
assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
SV("1940-01-01 22:57:56,877"));
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-1000000000ns}) ==
+ SV("1969-12-31 23:59:59,000000000"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::microseconds>{-1000000us}) ==
+ SV("1969-12-31 23:59:59,000000"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{-1000ms}) ==
+ SV("1969-12-31 23:59:59,000"));
+
assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-1ns}) ==
SV("1969-12-31 23:59:59,999999999"));
@@ -143,6 +171,15 @@ static void test_fr_FR() {
assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{1ns}) ==
SV("1970-01-01 00:00:00,000000001"));
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{1000000000ns}) ==
+ SV("1970-01-01 00:00:01,000000000"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::microseconds>{1000000us}) ==
+ SV("1970-01-01 00:00:01,000000"));
+
+ assert(stream_fr_FR_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{1000ms}) ==
+ SV("1970-01-01 00:00:01,000"));
+
assert(stream_fr_FR_locale<CharT>(file_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03,123456789"));
assert(stream_fr_FR_locale<CharT>(file_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
@@ -189,6 +226,15 @@ static void test_ja_JP() {
assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{-946'688'523'123ms}) ==
SV("1940-01-01 22:57:56.877"));
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-1000000000ns}) ==
+ SV("1969-12-31 23:59:59.000000000"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::microseconds>{-1000000us}) ==
+ SV("1969-12-31 23:59:59.000000"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{-1000ms}) ==
+ SV("1969-12-31 23:59:59.000"));
+
assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{-1ns}) ==
SV("1969-12-31 23:59:59.999999999"));
@@ -198,6 +244,15 @@ static void test_ja_JP() {
assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{1ns}) ==
SV("1970-01-01 00:00:00.000000001"));
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::nanoseconds>{1000000000ns}) ==
+ SV("1970-01-01 00:00:01.000000000"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::microseconds>{1000000us}) ==
+ SV("1970-01-01 00:00:01.000000"));
+
+ assert(stream_ja_JP_locale<CharT>(std::chrono::file_time<std::chrono::milliseconds>{1000ms}) ==
+ SV("1970-01-01 00:00:01.000"));
+
assert(stream_ja_JP_locale<CharT>(file_time<std::chrono::nanoseconds>{946'688'523'123'456'789ns}) ==
SV("2000-01-01 01:02:03.123456789"));
assert(stream_ja_JP_locale<CharT>(file_time<std::chrono::microseconds>{946'688'523'123'456us}) ==
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