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> From: Richard Kelsey <kelsey@xxxxxxx> [re bear's version of unspecific] > Sure, but a portable FFI cannot assume that the implementation > supports your type of unspecific value. Having the FFI use > a single 'unspecific' value works in your implementaion (you > just create a single unspecific value for use in C code). It > isn't as useful as it might be in your implementation but it > is portable. That would be persuasive if there were some compelling reason to treat "give me an unspecific value" as special in the FFI. Since there isn't, it isn't. You're saying "Well, I chose to make a special case of UNSPECIFIC for reasons I haven't cared to get into --- but my decision is just fine because surely you can hack around it in your implementation." -t