ChuanqiXu added inline comments.

================
Comment at: clang/include/clang/AST/ASTContext.h:1369
   }
+  QualType getDecayedType(QualType T, QualType Decayed) const;
 
----------------
mizvekov wrote:
> ChuanqiXu wrote:
> > mizvekov wrote:
> > > ChuanqiXu wrote:
> > > > Maybe we need a comment for this. The signature looks not straight 
> > > > forward and I can't relate this to the above comment.
> > > I think I wanted to make this an internal variant, since we will probably 
> > > never need this outside of ASTContext anyway, but there is the friendship 
> > > situation between Type and ASTContext. Maybe making this private would be 
> > > for the best.
> > Yeah, the signature confused me as well... as long as the second parameter 
> > is `Decayed` already, why we need to get the decayed type again? I guess 
> > `Underlying` may be a better name.
> Ah I see, but this confusion already existed. See the definition of 
> DecayedType in Type.h, where you have the `QualType getDecayedType()` member. 
> This is what this Decayed parameter represents, what we will put in there to 
> be returned by that method.
> 
> For DecayedType / AdjustedType / AttributedType there exists this confusion 
> where they have two child nodes, which arbitrarily picking one of them to be 
> called the `UnderlyingType` could be controversial. You could make the case 
> that it should be the same one we use for implementing `desugar`, but there 
> are arguments there for the other case.
I see. I got your point. Thanks.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D130308/new/

https://reviews.llvm.org/D130308

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