From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (from majordomo@localhost) by pauillac.inria.fr (8.7.6/8.7.3) id AAA19971; Mon, 25 Oct 2004 00:53:01 +0200 (MET DST) X-Authentication-Warning: pauillac.inria.fr: majordomo set sender to owner-caml-list@pauillac.inria.fr using -f Received: from nez-perce.inria.fr (nez-perce.inria.fr [192.93.2.78]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id AAA19939 for ; Mon, 25 Oct 2004 00:52:59 +0200 (MET DST) Received: from rproxy.gmail.com (rproxy.gmail.com [64.233.170.192]) by nez-perce.inria.fr (8.13.0/8.13.0) with ESMTP id i9OMqwGF028120 for ; Mon, 25 Oct 2004 00:52:59 +0200 Received: by rproxy.gmail.com with SMTP id 79so292887rnk for ; Sun, 24 Oct 2004 15:52:58 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:references; b=X6L/pFmvwlJUHMBvfeleqyeBZCee/gEkMBAFW7yMnSp77FYCA7+FwG/jtJ32FssHSx3rRDHxFpTomVVfaBc4mY34gwvvXniuA2KfnkyQkX9ebrQ3vIDXVb+lk+6NfsQWG7+6FqE9TsHoddqFe1o5SHenwrLgKdad5f5SkRvxt+8= Received: by 10.38.79.21 with SMTP id c21mr772060rnb; Sun, 24 Oct 2004 15:52:58 -0700 (PDT) Received: by 10.38.65.58 with HTTP; Sun, 24 Oct 2004 15:52:58 -0700 (PDT) Message-ID: Date: Sun, 24 Oct 2004 15:52:58 -0700 From: Nathaniel Gray Reply-To: Nathaniel Gray To: skaller@users.sourceforge.net Subject: Re: [Caml-list] Single-case union types as strong typedefs Cc: Jacques Garrigue , caml-list In-Reply-To: <1098595127.7584.219.camel@pelican.wigram> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit References: <20041023.123139.106410806.garrigue@kurims.kyoto-u.ac.jp> <1098595127.7584.219.camel@pelican.wigram> X-Miltered: at nez-perce with ID 417C324B.000 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Loop: caml-list@inria.fr X-Spam: no; 0.00; caml-list:01 typedefs:01 2004:99 sourceforge:01 2004:99 jacques:01 unlucky:01 boxing:01 1,3:01 1,3:01 optimised:01 garrigue:01 garrigue:01 caltech:01 caltech:01 Sender: owner-caml-list@pauillac.inria.fr Precedence: bulk On 24 Oct 2004 15:18:47 +1000, skaller wrote: > On Sun, 2004-10-24 at 07:24, Nathaniel Gray wrote: > > On Sat, 23 Oct 2004 12:31:39 +0900 (JST), Jacques Garrigue > > wrote: > > > > > Unlucky! > > > With your example, there is no extra boxing involved. > > > I.e. (1,3) and Rpos(1,3) and Apos(1,3) all share the same physical > > > representation (a block with 2 fields). > > > The problem you describe only occurs when your single constructor has > > > only one argument. > > > > Really?? You're kidding. That's kind of cool but kind of strange -- > > why does it only optimize for composite types? > > For two arguments, it's a pointer to a pair on the heap. > For one, its a pointer to a one element tuple on the heap. > This case might be optimised by replacing the pointer > with the value stored in that single field, but it isn't. Right. As I said in my reply to myself, after thinking for a minute I figured it out. -- >>>-- Nathaniel Gray -- Caltech Computer Science ------> >>>-- Mojave Project -- http://mojave.cs.caltech.edu --> ------------------- 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