bnbarham added inline comments.

================
Comment at: clang/lib/Index/USRGeneration.cpp:1032
+  case TemplateArgument::UncommonValue:
+    // FIXME: Visit value.
+    break;
----------------
akyrtzi wrote:
> erichkeane wrote:
> > bolshakov-a wrote:
> > > aaron.ballman wrote:
> > > > Any particular reason this isn't being handled now?
> > > I need some guidance here. Which characters are allowed in the USR? Could 
> > > the mangling algorithm from `CXXNameMangler::mangleValueInTemplateArg` be 
> > > moved into some common place and reused here?
> > I have no idea what is valid here.  BUT @akyrtzi and @gribozavr (or 
> > @gribozavr2 ?) seem to be the ones that touch these files the most?
> Adding @bnbarham to review the `Index` changes.
Just visiting the underlying type seems reasonable, ie. 
`VisitType(Arg.getUncommonValueType());`. If it needed to be differentiated 
between a `TemplateArgument::Type` you could add a prefix character (eg. `U`), 
but that doesn't seem needed to me.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D140996/new/

https://reviews.llvm.org/D140996

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