Outer nested-name-specifier in pointer-to-member does not get a semantic token

[HighCommander4]

In the following code:

struct Outer {
  struct Inner {
    void foo();
  };
};

using Alias = void (Outer::Inner:: *)();

the token Outer on the last line does not get a semantic token.

[HighCommander4]

Go-to-def on the affected Outer token does not work either.

[HighCommander4]

It looks like the AST just... doesn't have a TypeLoc there?

The entire void (Outer::Inner:: *)() gets a MemberPointerTypeLoc, which exposes two constituent TypeLocs: a "pointee loc" which represents the function type, and a TypeLoc for the class whose member it is. The latter is a RecordTypeLoc for Outer::Inner, which does not expose a distinct TypeLoc for the Outer in the qualifier.

In other contexts where a construction like Outer::Inner occurs, the whole thing gets an ElaboratedTypeLoc wrapping the RecordTypeLoc , which exposes a NestedNameSpecifierLoc for the qualifier which exposes another RecordTypeLoc for Outer.

[HighCommander4]

Filed upstream as llvm/llvm-project#118198