[PATCH] D41992: [libcxx] Avoid spurious construction of valarray elements

[Marshall Clow via Phabricator via cfe-commits]

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

This LGTM.



================
Comment at: include/valarray:3728
+{
+    __clear();
     if (__n)
----------------
I thought that you had lost an exception guarantee here, but it turns out that there wasn't one before.  If the allocation fails, you are left with an empty array instead of the old contents.




https://reviews.llvm.org/D41992