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Disjoint types in SRFIs Marc Nieper-Wißkirchen (13 Jun 2021 09:06 UTC)
Re: Disjoint types in SRFIs Lassi Kortela (13 Jun 2021 10:16 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (13 Jun 2021 10:29 UTC)
Re: Disjoint types in SRFIs Lassi Kortela (13 Jun 2021 10:40 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (13 Jun 2021 11:50 UTC)
Re: Disjoint types in SRFIs Lassi Kortela (13 Jun 2021 11:55 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (13 Jun 2021 13:11 UTC)
Re: Disjoint types in SRFIs Daphne Preston-Kendal (08 Dec 2021 11:06 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (08 Dec 2021 12:40 UTC)
Re: Disjoint types in SRFIs John Cowan (08 Dec 2021 18:20 UTC)
Re: Disjoint types in SRFIs Wolfgang Corcoran-Mathe (13 Jun 2021 18:58 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (13 Jun 2021 19:18 UTC)
Re: Disjoint types in SRFIs Wolfgang Corcoran-Mathe (15 Jun 2021 19:30 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (15 Jun 2021 20:52 UTC)
Re: Disjoint types in SRFIs John Cowan (15 Jun 2021 21:55 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (16 Jun 2021 07:34 UTC)
Re: Disjoint types in SRFIs Wolfgang Corcoran-Mathe (18 Jun 2021 20:33 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (18 Jun 2021 20:43 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (19 Jun 2021 10:02 UTC)
Re: Disjoint types in SRFIs Marc Feeley (19 Jun 2021 12:29 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (19 Jun 2021 12:46 UTC)
Re: Disjoint types in SRFIs Wolfgang Corcoran-Mathe (19 Jun 2021 17:49 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (19 Jun 2021 18:06 UTC)
Re: Disjoint types in SRFIs Wolfgang Corcoran-Mathe (19 Jun 2021 17:08 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (19 Jun 2021 17:18 UTC)
Re: Disjoint types in SRFIs Wolfgang Corcoran-Mathe (19 Jun 2021 18:09 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (19 Jun 2021 18:23 UTC)
Re: Disjoint types in SRFIs Wolfgang Corcoran-Mathe (19 Jun 2021 20:34 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (19 Jun 2021 21:03 UTC)
Re: Disjoint types in SRFIs John Cowan (13 Jun 2021 20:52 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (13 Jun 2021 21:17 UTC)
Re: Disjoint types in SRFIs John Cowan (13 Jun 2021 21:38 UTC)
Re: Disjoint types in SRFIs Marc Nieper-Wißkirchen (14 Jun 2021 07:04 UTC)

Re: Disjoint types in SRFIs Wolfgang Corcoran-Mathe 15 Jun 2021 19:30 UTC

On 2021-06-13 21:18 +0200, Marc Nieper-Wißkirchen wrote:
> > How does associating a type with a unique string guarantee its
> > disjointness in Scheme's type system?  Unless a future standard
> > incorporates something about types with different UUIDs being
> > disjoint into its semantics, I don't see how this is any more
> > meaningful than the current advisory statements.  It seems a
> > little like associating booleans with the Empire State Building
> > and vectors with the Chrysler Building; sure, those are unique
> > things, but what does it say about Scheme?
> >
>
> R6RS §11.1. Base types: "No object satisfies more than one of the following
> predicates: ..."
>
> [snip]
>
> PS: As the R7RS base language is not rich enough, I have to cite R6RS here,
> but the semantics can be applied mutatis mutandis to R7RS as well (as we
> are talking about opaque and sealed record types).

Sorry, I would like to have Read The Fine Standard before
commenting.

I'm still hesitant to adopt this for SRFI 224; as John mentions,
I wonder if it makes sense to require *all* implementations of SRFI
224 to provid a fxmapping type with the same UID.

--
Wolfgang Corcoran-Mathe  <xxxxxx@sigwinch.xyz>

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