[PATCH] D69626: Fix Microsoft compatibility handling of commas in nested macro expansions.

[Nico Weber via Phabricator via cfe-commits]

thakis added a comment.

Is this needed to parse system headers?

In general, we try to emulate only warts we must emulate, and if feasible we try to emit some -Wmicrosoft warning when the compat path is taken.

(MSVC added /experimental:preprocessor like 2 years ago, but it hasn't made it to a /Zc: flag yet so I suppose standard headers might keep needing these tweaks.)

(See https://docs.google.com/presentation/d/1oxNHaVjA9Gn_rTzX6HIpJHP7nXRua_0URXxxJ3oYRq0/edit#slide=id.g71ecd450e_2_843 slide 23-27)


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D69626/new/

https://reviews.llvm.org/D69626