[cfe-dev] looking "up" the tree in RecursiveASTVisitor?

[Noel Grandin via cfe-dev]

Hi

Is there a straightforward way to look "up" the tree when implementing
a clang plugin using RecursiveASTVisitor ?

I've bumped into this a couple of times and never found a "nice" answer.

For example, I have overridden

       VisitCallExpr(const CallExpr* expr)

and I want to know in which context the call is happening i.e. from
which FunctionDecl the call is being made.

It seems like there should be an easy way to walk back up the tree?

Thanks, Noel Grandin