From: Brian Rogoff <bpr@best.com>
To: caml-list@inria.fr
Subject: Re: Array interface question
Date: Fri, 22 Jan 1999 12:05:41 -0800 (PST) [thread overview]
Message-ID: <Pine.BSF.4.05.9901221147030.3130-100000@shell5.ba.best.com> (raw)
In-Reply-To: <199901221921.UAA10085@pauillac.inria.fr>
On Fri, 22 Jan 1999, Pierre Weis wrote:
> > Why is there no creation function which does not take a default
> > value for filling the array?
> [...]
> >
> > -- Brian
>
> This is due to the coexistance in Caml of polymorphism and mutable
> values. The system would be unsafe if we were able to allocate
> polymorphic mutable values (those mutable values could be filled
> afterwards with values of unrelated types, and hence would break the
> homogeneous sequence nature of arrays, and then may be read back with
> types unrelated to their proper types).
Thanks, I should have known that was it.
Given this, I'd like to request a Sequence abstraction like the one in
SRC Modula-3, which permits addition and removal at either end, and random
access, in expected constant time, for inclusion in the stdlib. I have
several times had need of such an ADT (usually I only need to add at one
end and have random access), most recently in a BDD library I'm writing.
Any suggestions on how to write Sequence elegantly (and safely of course ;-)
in OCaml as it stands?
Probably having a default value for dynamic arrays is not so bad...
-- Brian
next prev parent reply other threads:[~1999-01-24 14:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-01-22 19:10 Brian Rogoff
1999-01-22 19:21 ` Pierre Weis
1999-01-22 20:05 ` Brian Rogoff [this message]
1999-01-23 10:47 ` Anton Moscal
1999-01-23 10:57 ` David Monniaux
1999-01-24 15:44 ` Jerome Vouillon
1999-01-24 21:36 ` Pierre Weis
1999-01-28 19:57 ` Brian Rogoff
1999-01-23 14:00 ` Size of arrays Juan Jose Garcia Ripoll
1999-01-24 22:31 ` Pierre Weis
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Pine.BSF.4.05.9901221147030.3130-100000@shell5.ba.best.com \
--to=bpr@best.com \
--cc=caml-list@inria.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).