[plt-scheme] Unnecessary use of letrec?

From: Jens Axel Søgaard (jensaxel at soegaard.net)
Date: Fri Jun 15 10:41:51 EDT 2007

Sam TH skrev:
> On 6/15/07, Jens Axel Søgaard <jensaxel at soegaard.net> wrote:
>> Grant Rettke skrev:
>> > Do most folks using mzscheme or DrS just go ahead and use the correct
>> > form according to R5RS or instead rely on how it works in mz or DrS?
>> Old habits die hard - so I usually follow R5RS, but since
>> R6RS will adopt letrec* semantics for letrec, it isn't terrible
>> important.
> This is not correct.  The current draft (and all previous drafts) of
> R6RS have letrec* semantics for internal definitions, but the
> semantics of letrec still have undefined evaluation order.

Thanks for the correction. I see now that letrec is kept, and a
new letrec* is added.

Jens Axel Søgaard

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