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Re: String internals sketch
From: |
David Kastrup |
Subject: |
Re: String internals sketch |
Date: |
Wed, 15 Mar 2017 16:46:36 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) |
Andy Wingo <address@hidden> writes:
> Hi :)
>
> On Fri 10 Mar 2017 16:31, David Kastrup <address@hidden> writes:
>
>> a) Guile already uses two different internal representations: basically
>> UCS-8 and UCS-32. Adding more internal representations could be done
>> using a number of tables indexed by the internal representation type,
>> making string representations sort of a "plugin".
>
> I think we probably want to avoid this if we can. We gain a number of
> efficiencies if we can be concrete.
Maybe use GOOPS on the string ops by diversifying on string subtypes?
One would start by making UCS-32 and UCS-8 string implementations
subtypes of strings, then add UTF-8-internal (which is identical to
UTF-8 for all-valid UTF-8)? I doubt that this would beat a vector of
dedicated hooks but it might look more transparent to implementors with
special needs? Maybe not: they might not approach this from a Guile
angle of thinking.
--
David Kastrup