[clang] [BoundsSafety] Support bounds-safety attributes in type positions (PR #179612)

[Yeoul Na via cfe-commits]

rapidsna wrote:

> It's great to see the AST -> Sema dependency removed.
> 
> I'm still concerned about the move of LateParsedDeclaration and LateParsedAttribute from Parser to Sema. Those classes seem very parsing specific.
> 
> And scrolling down, I see that their implementations are still in Parser. That doesn't seem right -- I don't think we can define LateParsedDeclaration in Sema/DeclSpec.h and implement it in Parse/ParseCXXInlineMethods.cpp.
> 
> Maybe the parsing and the sema parts can be split apart somehow. How do the parser and sema collaborate around regular ParsedAttr objects?

`ParsedAttr` is defined in `ParsedAttr.h` and it's included in `Sema.h` and `Parser.h` includes `Sema.h`, so both Sema and Parser see the definition of `ParsedAttr`. 

https://github.com/llvm/llvm-project/pull/179612