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On Tue, Feb 22, 2011 at 10:36 AM, David Kastrup <> wrote:
> It is passed by reference.  Only the references are actually maintained
> in the call stack.  Any changes to the list itself can't be rewound when
> rereturning into a continuation.

     So you are confusing continuations with software transaction
memory. Continuations are about first-class control, not data
structures rollback and commit.