caml-list - the Caml user's mailing list
 help / color / mirror / Atom feed
From: Michal Moskal <malekith@pld-linux.org>
To: Lukasz Stafiniak <luk_stafi@wp.pl>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Let-in vs beta-redex
Date: Tue, 2 Sep 2003 12:26:13 +0200	[thread overview]
Message-ID: <20030902102613.GA19386@ep09.kernel.pl> (raw)
In-Reply-To: <000e01c370a4$592d6300$3bef4dd5@ppp>

On Mon, Sep 01, 2003 at 06:15:54PM +0200, Lukasz Stafiniak wrote:
> Hi,
> 
> Is let-in more efficient than beta-redex or are they computationally
> equivalent? Is let-in a syntax-sugar of beta-redex?
> 
> E.g.
> 
> let x = sin 2. in x *. x *. x;;
> 
> (fun x -> x *. x *. x) (sin 2.);;

let in is *not* equivalent to beta-redex because of typing. Type
variables are not generalized in beta-redex, for example consider:

let id x = x in
(id 1, id true)

vs.

(fun id -> (id 1, id true)) (fun x -> x)

-- 
: Michal Moskal :: http://www.kernel.pl/~malekith : GCS {C,UL}++++$ a? !tv
: PLD Linux ::::::::: Wroclaw University, CS Dept : {E-,w}-- {b++,e}>+++ h

-------------------
To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr
Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/
Beginner's list: http://groups.yahoo.com/group/ocaml_beginners


      parent reply	other threads:[~2003-09-02 10:26 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-09-01 16:15 Lukasz Stafiniak
2003-09-01 18:09 ` John Gerard Malecki
2003-09-02 10:26 ` Michal Moskal [this message]

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=20030902102613.GA19386@ep09.kernel.pl \
    --to=malekith@pld-linux.org \
    --cc=caml-list@inria.fr \
    --cc=luk_stafi@wp.pl \
    /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).