[PATCH] D142604: [Clang] Fix __VA_OPT__ implementation so that it treats the concatenation of a non-placemaker token and placemaker token as a non-placemaker token

[Aaron Ballman via Phabricator via cfe-commits]

aaron.ballman added subscribers: Mordante, ldionne.
aaron.ballman added a comment.

I don't think the libc++ precommit CI failures are related to this change and so I don't think they block anything, but it'd be nice if a libc++ person could verify (CC @ldionne @Mordante )


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  https://reviews.llvm.org/D142604/new/

https://reviews.llvm.org/D142604