Dear Mike, I looked around in the mailing list, and I saw someone already asked the question, which has been kept unanswered (to my knowledge, sorry if I am wrong) . "Would it be easy to allow setting custom placeholder values of this kind returned by getmetatable(cdata), i.e. implement __metatable for custom cdata types?” I am in fact interested in this too. I understand you want to protect FFI metatables and I understand that one should not be able to retrieve the actual metatable of a cdata with getmetatable(). But is the idea of customizing __metatable really wrong (or not possible technically speaking) in your opinion? Thanks Ronan
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