[PATCH] D156796: [ADT] [NFC] Introduce isLower and isUpper helpers.

[Fangrui Song via Phabricator via llvm-commits]

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

We may add a unittest to `unittests/ADT/StringExtrasTest.cpp`, but this may not be worth the trouble as `isLower/etc` are used by others we already provide (e.g. `toUpper`).


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D156796/new/

https://reviews.llvm.org/D156796