[PATCH] D56494: Implement the `sys_time` portions of the C++20 calendaring stuff

[Louis Dionne via Phabricator]

ldionne accepted this revision.
ldionne added a comment.
This revision is now accepted and ready to land.

I've only had time to do a cursory review, but LGTM so far.



================
Comment at: include/chrono:2431
+    };
+    return month() != February || !__y.is_leap() ?
+        __d[static_cast<unsigned>(month()) - 1] : chrono::day{29};
----------------
Mostly a nitpick, but I would find this clearer:

```
month() == February && __y.is_leap() ? chrono::day{29} : __d[static_cast<unsigned>(month()) - 1]
```



CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D56494/new/

https://reviews.llvm.org/D56494