akyrtzi added inline comments.
================
Comment at: clang/lib/Lex/Lexer.cpp:4251
DepDirectives.front().Tokens[NextDepDirectiveTokenIndex++];
+ if (NextDepDirectiveTokenIndex > 1 || DDTok.Kind != tok::hash) {
+ // Read something other than a preprocessor directive hash.
----------------
benlangmuir wrote:
> Why do we need the >1 check? I'm not familiar with the details of MIO here.
I'm making sure that `MIOpt.ReadToken()` is called for every token except the
starting hash of a preprocessor directive, to match what regular lexing is
doing.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D128772/new/
https://reviews.llvm.org/D128772
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