@Jeroen, here’s what I’m solving with my hacking the parent environment chain: I’m essentially re-implementing `base::attach` — except that I’m attaching objects *locally* in the function instead of globally. I don’t think this can be done in any way except by modifying the parent environment chain. Incidentally, package namespaces do largely the same thing. The difference is that they only need to do it *once* (when loaded), and subsequent function calls do not modify this chain.
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