2011/11/29 Allen Wirfs-Brock <[email protected]> > Because of the invariant validation mechanism, the target needs to be a > direct reference to a native object rather than a mirror. >
Indeed. > If I understand the general usage model, then in the general case it may > not be as lean as Proxy(target,handler) regardless of whether Mirrors are > involved. If the handler needs to retain any per proxy instance state then > a new handler is going to have to be instantiated for each Proxy instance > in order to capture that state. Proxy(target, new MyHandler(args)) > Indeed, although it remains possible using the current API to write stateless handlers that maintain their state in a WeakMap keyed by their target (or the handlers themselves). There will indeed be cases where handlers want to maintain other state directly. Still, there will also be cases where the handler does not need to retain extra state, and it's a good thing that in those cases, no additional object allocation is necessary. Cheers, Tom
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