From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: ludo@gnu.org (Ludovic =?iso-8859-1?Q?Court=E8s?=) Newsgroups: gmane.lisp.guile.devel Subject: Re: status of "eval in scheme" Date: Sun, 04 Oct 2009 00:11:52 +0200 Message-ID: <871vlkm8k7.fsf@gnu.org> References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1254607957 6234 80.91.229.12 (3 Oct 2009 22:12:37 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 3 Oct 2009 22:12:37 +0000 (UTC) To: guile-devel@gnu.org Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Sun Oct 04 00:12:30 2009 Return-path: Envelope-to: guile-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1MuCq5-0004BV-GH for guile-devel@m.gmane.org; Sun, 04 Oct 2009 00:12:29 +0200 Original-Received: from localhost ([127.0.0.1]:45078 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MuCq5-0000Qe-1O for guile-devel@m.gmane.org; Sat, 03 Oct 2009 18:12:29 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MuCq1-0000Pr-Qh for guile-devel@gnu.org; Sat, 03 Oct 2009 18:12:25 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MuCpx-0000NL-DF for guile-devel@gnu.org; Sat, 03 Oct 2009 18:12:25 -0400 Original-Received: from [199.232.76.173] (port=45232 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MuCpx-0000NH-3C for guile-devel@gnu.org; Sat, 03 Oct 2009 18:12:21 -0400 Original-Received: from lo.gmane.org ([80.91.229.12]:34406) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MuCpw-0007KW-GW for guile-devel@gnu.org; Sat, 03 Oct 2009 18:12:20 -0400 Original-Received: from list by lo.gmane.org with local (Exim 4.50) id 1MuCps-00048j-Gc for guile-devel@gnu.org; Sun, 04 Oct 2009 00:12:16 +0200 Original-Received: from reverse-83.fdn.fr ([80.67.176.83]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 04 Oct 2009 00:12:16 +0200 Original-Received: from ludo by reverse-83.fdn.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 04 Oct 2009 00:12:16 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 31 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: reverse-83.fdn.fr X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 13 =?iso-8859-1?Q?Vend=E9miaire?= an 218 de la =?iso-8859-1?Q?R=E9volution?= X-PGP-Key-ID: 0xEA52ECF4 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 821D 815D 902A 7EAB 5CEE D120 7FBA 3D4F EB1F 5364 X-OS: x86_64-unknown-linux-gnu User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) Cancel-Lock: sha1:LorjL+iV4JsHLqiKcgiqY86TyBU= X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Developers list for Guile, the GNU extensibility library" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Errors-To: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.devel:9437 Archived-At: Hello! Andy Wingo writes: > The second option is to bootstrap from the C compiler, using an > interpreter written in C *simply to compile eval.scm*. [...] > The semantics of the Scheme `eval' should match the semantics of the > Scheme compiler, and the semantics of the C `eval' So did you look into generating the latter from the former? Or is it easier to transliterate it by hand? > Actually, Scheme does have a way to deal efficiently with multiple > arguments: SRFI-16's case-lambda. Guile needs to compile case-lambda to > appropriate bytecode in which the /callee/ -- the procedure itself -- > dispatches on its arguments, potentially raising a wrong-num-args error > itself. (Currently in the VM, the caller checks the argument count.) > This entails a change in the calling convention, and thus in the > VM and the debugging tools, and a change in Tree-IL. It's a big one. I > have the low-level bits implemented in my case-lambda branch, but it's > going to be another week or two until it's baked. Sounds interesting! I appreciate the summary (as usual) and the nice perspectives. :-) Thanks, Ludo’.