[PATCH] D128947: [Lex] Introduce `PPCallbacks::LexedFileChanged()` preprocessor callback

[Argyrios Kyrtzidis via Phabricator via cfe-commits]

akyrtzi added inline comments.


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Comment at: clang/lib/Lex/PPLexerChange.cpp:136
                            PPCallbacks::EnterFile, FileType);
+    FileID PrevFID;
+    SourceLocation EnterLoc;
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akyrtzi wrote:
> benlangmuir wrote:
> > Why does `LexedFileChanged` have `PrevFID` set, but `FileChanged` does not (it has a default argument of `FileID()`?  I would have expected that when you call both `FileChanged` and `LexedFileChanged` for the same event this would match.
> I didn't want to change the "contract" of `FileChanged()` as part of these changes but it's probably unlikely that someone depends on `FileID` being invalid, I'll give it a try.
I'm passing a `PrevFID` value for `FileChanged()` as well and I only had to update one test.


Repository:
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  https://reviews.llvm.org/D128947/new/

https://reviews.llvm.org/D128947