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by a1369209993
2446 days ago
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> I'm having trouble picturing what such restrictions would look like. [...] there's no sane way to restrict cdr. I guess you could question its sanity, but the obvious way would be to say that any object (cons cell) produced by make-closure or (successfully) passed to apply is/becomes a "closure object", and car/cdr will either fail at runtime or deoptimise it into its 'official' representation. |
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