[eeps] EEP XXX: Pattern-test operator

David Mercer <>
Tue May 1 04:20:51 CEST 2012

On Apr 30, 2012, at 1:52, "Richard O'Keefe" <> wrote:

> On 30/04/2012, at 1:59 PM, David Mercer wrote:
>> You actually answered that quite well, and I understood your answer.  I was just trying to understand *why* or *when* binding in guards might be necessary.
> That's described in Erik Søe Sørensen's original proposal.
> Here's an example, adapted from one of his.
. . .
> Following this example, you will see that it is easy to come
> up with examples that take O(n) tokens to write using ?= but
> O(n**2) without.  

Thanks, ROK.  Excellent explanation.



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