[libc++][chrono] Fixes (sys|local)_time formatters. (#76456)
- The sys_time formatter is constrained, which was not implemented.
- There is a sys_days formatter which was not implemented.
- The local_time formatter uses the sys_time formatter in its
implementation so "inherited" the same issues.
Fixes: https://github.com/llvm/llvm-project/issues/73849
Fixes: https://github.com/llvm/llvm-project/issues/67983
diff --git a/libcxx/include/__chrono/ostream.h b/libcxx/include/__chrono/ostream.h
index f171944..b687ef8 100644
--- a/libcxx/include/__chrono/ostream.h
+++ b/libcxx/include/__chrono/ostream.h
@@ -42,11 +42,18 @@
namespace chrono {
template <class _CharT, class _Traits, class _Duration>
+ requires(!treat_as_floating_point_v<typename _Duration::rep> && _Duration{1} < days{1})
_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&
-operator<<(basic_ostream<_CharT, _Traits>& __os, const sys_time<_Duration> __tp) {
+operator<<(basic_ostream<_CharT, _Traits>& __os, const sys_time<_Duration>& __tp) {
return __os << std::format(__os.getloc(), _LIBCPP_STATICALLY_WIDEN(_CharT, "{:L%F %T}"), __tp);
}
+template <class _CharT, class _Traits>
+_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&
+operator<<(basic_ostream<_CharT, _Traits>& __os, const sys_days& __dp) {
+ return __os << year_month_day{__dp};
+}
+
template <class _CharT, class _Traits, class _Duration>
_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&
operator<<(basic_ostream<_CharT, _Traits>& __os, const file_time<_Duration> __tp) {
