[r6rs-discuss] [Formal] Remove the (r6rs when-unless) library

From: Lauri Alanko <la>
Date: Mon Mar 12 10:44:29 2007

On Sun, Mar 11, 2007 at 03:43:39PM +0100, Michael Sperber wrote:
> worth the cost. As I don't use `when' and `unless', it's clear that
> they're not worth the cost to me. I wonder what others think.

I'm indifferent about "when": (if (...) (begin ...)) is common enough
that something to reduce one level of nesting makes sense, but it's
not a big deal for me.

However, the additional value of "unless" seems negligible. It's not a
big deal to add a "not", and in many cases (e.g. comparisons) a
negative predicate is directly available anyway. The utility doesn't
seem to justify yet another special form.


Lauri
Received on Mon Mar 12 2007 - 10:44:25 UTC