Re: Schwartzian transforms

[John Porter]

James Mastros wrote:
> I'm of the opinion that we should consider 3 to be Just Plain Silly and not
> worth worring about overmuch.  

AFAICT, you're worrying about everything overmuch.

It suffices, I believe, to put the following contract on the
sort() function:

  If the user-supplied comparison function is not relative-idempotent,
  then the results of sort() are not guaranteed to be sorted.

  If the user-supplied key extraction function is tagged with
  :function/:pure (or whatever), then perl is free to optimize
  the operation of sort() by memoizing the results of calls to
  that function.

-- 
John Porter