Though it should be remembered that the very first refactoring tool was written in and for Smalltalk, a quite dynamic language. Sure, C++ is messier, but probably some progress can be made. Truly robust refactoring, as you say, is probably infeasible, though.
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Robust refactoring tools for C++, comparable to the refactoring tools available for Java or C#.
(I understand why we don't have them, and can't have them. I'm just saying they should exist.)
Though it should be remembered that the very first refactoring tool was written in and for Smalltalk, a quite dynamic language. Sure, C++ is messier, but probably some progress can be made. Truly robust refactoring, as you say, is probably infeasible, though.