ken-matsui added inline comments.
================
Comment at: clang/lib/Lex/PPDirectives.cpp:1356
+
+ PP.Diag(FlagTok, diag::ext_pp_gnu_line_directive);
} else if (FlagVal == 2) {
----------------
aaron.ballman wrote:
> I speculate that this change is wrong.
>
> The goal here is to diagnose any time there's a GNU line marker and now we're
> only trigging the diagnostic when the line marker's value is 1; that misses
> diagnostics when the marker value is something else.
>
> That's why I suggested warning each place we return `false` from this
> function -- those are the situations when the line marker is syntactically
> correct and we're going to make use of it in the caller. (We don't want to
> warn about use of a line marker when we're going to generate an error anyway.)
@aaron.ballman
Thank you!
Just to confirm, do I need to remove the call of `Diag` after `GetLineValue`
and put `Diag`s into all branches of returning `false` in this function?
If so, I think putting `Diag` after the call of this function would be better.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D124534/new/
https://reviews.llvm.org/D124534
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