[llvm-branch-commits] [clang] [clang][NFC] Remove CXXRecordDecl::lookupDependentName() and its helpers (PR #128392)

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cor3ntin wrote:

> LGTM in general, but my concern would be that we're less clear about the number of uses of this function out-of-tree (and how hard it could be to migrate them to HeuristicResolver), so as an alternative, can we turn the implementation to use HeuristicResolver and explicitly deprecate it for a while before eventually removing it?

We make no stability guarantees whatsoever for the C++ interfaces (except we don't change in in abi breaking ways in point releases).
The only stable interfaces we offer are the C interfaces

https://github.com/llvm/llvm-project/pull/128392