From: skaller <skaller@users.sourceforge.net>
To: "Marcin 'Qrczak' Kowalczyk" <qrczak@knm.org.pl>
Cc: caml-list@pauillac.inria.fr
Subject: Re: [Caml-list] laziness
Date: 04 Sep 2004 21:21:10 +1000 [thread overview]
Message-ID: <1094296869.3352.280.camel@pelican.wigram> (raw)
In-Reply-To: <87656u2zrk.fsf@qrnik.zagroda>
On Sat, 2004-09-04 at 18:40, Marcin 'Qrczak' Kowalczyk wrote:
> skaller <skaller@users.sourceforge.net> writes:
>
> > However if the call is *inlined* to get
> >
> > if c' then a' else b'
> >
> > then perhaps a' or b' will never be evaluated.
>
> No. Inlining is considered an optimization, which implies that it
> doesn't change the semantics except when it was not fully specified
> in the first place.
I understand that argument -- but that doesn't mean the
compiler conforms to the specification, nor that the
specification is best.
> E.g. the order of evaluation of arguments is
> unspecified, so it might be different depending on inlining; but
> OCaml does specify that each argument are evaluated exactly once
> and inlining doesn't change that.
Must they be evaluated before the function is called?
--
John Skaller, mailto:skaller@users.sf.net
voice: 061-2-9660-0850,
snail: PO BOX 401 Glebe NSW 2037 Australia
Checkout the Felix programming language http://felix.sf.net
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next prev parent reply other threads:[~2004-09-04 11:22 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-04 6:30 skaller
2004-09-04 8:40 ` Marcin 'Qrczak' Kowalczyk
2004-09-04 11:21 ` skaller [this message]
2004-09-04 11:49 ` Richard Jones
2004-09-04 20:40 ` Hartmann Schaffer
2004-09-05 10:50 ` Jon Harrop
2004-09-05 14:07 ` skaller
2004-09-05 1:07 Jason Smith
2004-09-05 5:46 ` skaller
2004-09-06 0:57 ` Richard Jones
2004-09-06 6:11 ` Nicolas Cannasse
2004-09-06 8:24 ` skaller
2004-09-06 8:44 ` Erik de Castro Lopo
2004-09-06 12:55 ` Jon Harrop
2004-09-06 16:21 ` William Lovas
2004-09-06 22:35 ` Hartmann Schaffer
2004-09-07 8:31 ` Richard Jones
2004-09-07 8:37 ` Nicolas Cannasse
2004-09-06 9:07 Jason Smith
2004-09-06 10:18 ` skaller
2004-09-06 9:16 Jason Smith
2004-09-06 12:17 Jason Smith
2004-09-06 17:00 ` skaller
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