On Jan 31, 2012 11:08 PM, "Nick Coghlan" <ncogh...@gmail.com> wrote: > PJE is quite right that using a new named protocol rather than a > callback with a particular signature could also work, but I don't see > a lot of advantages in doing so.
The advantage is that it fits your brain better. That is, you don't have to remember another symbol besides the type you wanted. (There's probably fewer keystrokes involved, too.)
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