Personally, I don't think I'd trust the iterator after changing the hash, but I'd probably hope that it would iterate until there are zero keys in the hash that it has not yet returned.

There are two problems with that statement:

  1. How would you know that the hash had changed if the change(s) occur in (a) different thread(s).
  2. Remembering which keys have already been returned would impose a huge burden.

    Ditto: noticing that a new key had been added at a point preceding the current position of the iterator.

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In reply to Re^2: Design thoughts: iterator invalidation by BrowserUk
in thread Design thoughts: iterator invalidation by BrowserUk

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