rjmccall added a comment.

This is a cute hack, but... I'm not sure I accept the premise that it's a 
noteworthy obstacle to Clang development to do two greps instead of one.  And I 
don't think I've ever had to debug a diagnostic where __FILE__ and __LINE__ 
information would've been helpful.

Also, you could easily write a script that could automatically annotate 
arbitrary text with this information retroactively by turning the diagnostic 
text into a bunch of regular expressions, and then you wouldn't even need to 
re-run the compiler.


https://reviews.llvm.org/D35175



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