[PATCH] D66836: [libc++] Add `__truncating_cast` for safely casting float types to integers

[Steve Canon via Phabricator via cfe-commits]

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

I believe that the code can still be simplified somewhat, but that it's correct as-is for `float`, `double`, and `long double`. I'll take an AI to follow-up on future improvements, and let's get this in.


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  https://reviews.llvm.org/D66836/new/

https://reviews.llvm.org/D66836