aaron.ballman accepted this revision.
aaron.ballman added a comment.
This revision is now accepted and ready to land.

LGTM!



================
Comment at: 
clang-tools-extra/test/clang-tidy/infrastructure/verify-config.cpp:12
+
+// CHECK-VERIFY-DAG: command-line option '-config': warning: Unknown Check 
'readability-else-after-ret'; did you mean 'readability-else-after-return'
+// CHECK-VERIFY-DAG: command-line option '-config': warning: Unknown Check 
Option 'modernize-lop-convert.UseCxx20ReverseRanges'; did you mean 
'modernize-loop-convert.UseCxx20ReverseRanges'
----------------
njames93 wrote:
> aaron.ballman wrote:
> > njames93 wrote:
> > > aaron.ballman wrote:
> > > > It's unfortunate that `warning: ` appears in the middle of the 
> > > > diagnostic as opposed to at the start. I wonder if this can be reworked 
> > > > to say: `warning: Unknown check 'whatever'; did you mean 'whatever'? 
> > > > [-verify-config]` or something?
> > > > 
> > > > Also, no test coverage for the error case and for the unknown check 
> > > > case where there's no closest match worth talking about.
> > > Warning appearing in the middle is kind of by design as when clang emits 
> > > diagnostics, the source location is the first thing emitted, then the 
> > > type(warning|error). In this case `command-line option '-config'` is the 
> > > "source location"
> > > 
> > > > Also, no test coverage for the error case.
> > > I'm not 100% on that, there is no checking when the check glob is 
> > > actually built and I haven't figured out how to break it.
> > >  then the type(warning|error). In this case command-line option '-config' 
> > > is the "source location"
> > 
> > Ah, thanks for explaining your logic. FWIW, Clang uses a different style 
> > for that (`<command line>`): https://godbolt.org/z/f1rdsbjqe Perhaps we 
> > should follow suit? (In fact, we could use the diagnostic engine for this 
> > instead of emitting to the error stream ourselves?)
> The issue is, we don't have the actual source information right now to print 
> better error messages.
After some off-list discussion (thanks @njames93!) I'm retracting my concerns 
here for the moment because there are larger issues with the diagnostics engine 
to be solved first.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D127446/new/

https://reviews.llvm.org/D127446

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