sammccall added inline comments.

================
Comment at: clang/lib/Lex/Lexer.cpp:2387
     // unit.
     LangOpts.LineComment = true;
   }
----------------
It's much less obvious what this does in raw lexing mode.

My rough understanding is raw lexing mode is ~stateless and we may choose to 
recreate the lexer, start lexing at any point etc. So having a stateful flag 
flip won't actually result in the same text being lexed the same way, because 
we may not run in the same sequence.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D118471/new/

https://reviews.llvm.org/D118471

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