ymandel added inline comments.

================
Comment at: 
clang/lib/Analysis/FlowSensitive/Models/UncheckedOptionalAccessModel.cpp:262
 /// Returns true if and only if `Type` is an optional type.
 bool isOptionalType(QualType Type) {
   if (!Type->isRecordType())
----------------
xazax.hun wrote:
> Why do we need two places to define what is an optional type? Would it be 
> possible to somehow reuse the Declaration matcher on the RecordDecel here? Or 
> would that be bad for performance?
Good point. I dismissed reusing the matcher here because of performance 
concerns -- setting up the match is expensive (in the constant-time sense but 
still a lot of overhead). But, we're already using matching quite a lot so I 
suspect it doesn't matter. Still, what about the reverse -- use this predicate 
in the matcher, which is faster while still ensuring consistent results?

That said, what I really want is for the matcher logic to be made available 
outside of the matcher framework -- I think `NamedDecl` should have the core 
logic (parallel to `getQualifiedNameAsString`) and that could be used 
elsewhere, including the matcher.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D148344/new/

https://reviews.llvm.org/D148344

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