[r6rs-discuss] Problems with import syntax

From: AndrevanTonder <andre>
Date: Wed, 27 Jun 2007 22:06:05 -0400 (EDT)

On Wed, 27 Jun 2007, R. Kent Dybvig wrote:

> I believe that including "for" along with the others as you suggested
> above disambiguates these cases.
...
> I don't believe what we're converging upon is difficult to implement. It
> is posible we haven't sealed off all ambiguities, but if they are of the
> nature of the ones that have already come to light, I doubt they'll cause
> trouble in practice.

Okay - given your modified description, at this point no more ambiguities
occur to me.

> The current version syntax may not be convenient for all versioning
> practices, but that is probably true of any version syntax.

Let me also point out a small error in

   (and <version reference1> <version reference2> ...)
   (or <version reference1> <version reference2> ...)
   (not <version reference>)
   An empty <version reference> is equivalent to ().

The last line implies that

   (not) = (not ())

and perhaps also that

   (or) = (or ())
   (or (1)) = (or () (1))

etc., none of which are right.

Andre
Received on Wed Jun 27 2007 - 22:06:05 UTC