From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Ted Zlatanov Newsgroups: gmane.emacs.devel Subject: ELisp futures and continuations/coroutines (was: more url-utils?) Date: Thu, 19 May 2011 08:46:21 -0500 Organization: =?utf-8?B?0KLQtdC+0LTQvtGAINCX0LvQsNGC0LDQvdC+0LI=?= @ Cienfuegos Message-ID: <878vu2ztua.fsf_-_@lifelogs.com> References: <87fwogaxzb.fsf@stupidchicken.com> <87mxilezg8.fsf@lifelogs.com> <87boz0eov8.fsf@lifelogs.com> <87mxikrulm.fsf@lifelogs.com> <871uzw5asv.fsf@lifelogs.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1305813020 17183 80.91.229.12 (19 May 2011 13:50:20 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 19 May 2011 13:50:20 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu May 19 15:50:17 2011 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QN3cC-0004GT-TU for ged-emacs-devel@m.gmane.org; Thu, 19 May 2011 15:50:13 +0200 Original-Received: from localhost ([::1]:54062 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QN3cC-0003zs-Al for ged-emacs-devel@m.gmane.org; Thu, 19 May 2011 09:50:12 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:37223) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QN3c9-0003v6-17 for emacs-devel@gnu.org; Thu, 19 May 2011 09:50:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QN3c7-0001Ov-VB for emacs-devel@gnu.org; Thu, 19 May 2011 09:50:08 -0400 Original-Received: from lo.gmane.org ([80.91.229.12]:53939) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QN3c7-0001OZ-Ky for emacs-devel@gnu.org; Thu, 19 May 2011 09:50:07 -0400 Original-Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1QN3c6-00049V-Aw for emacs-devel@gnu.org; Thu, 19 May 2011 15:50:06 +0200 Original-Received: from 38.98.147.130 ([38.98.147.130]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 19 May 2011 15:50:06 +0200 Original-Received: from tzz by 38.98.147.130 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 19 May 2011 15:50:06 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 22 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: 38.98.147.130 X-Face: bd.DQ~'29fIs`T_%O%C\g%6jW)yi[zuz6; d4V0`@y-~$#3P_Ng{@m+e4o<4P'#(_GJQ%TT= D}[Ep*b!\e,fBZ'j_+#"Ps?s2!4H2-Y"sx" User-Agent: Gnus/5.110018 (No Gnus v0.18) Emacs/24.0.50 (gnu/linux) Cancel-Lock: sha1:KhVr22q8ord1fMA+onyVvmq+RtI= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 80.91.229.12 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:139516 Archived-At: On Wed, 18 May 2011 19:05:57 -0300 Stefan Monnier wrote: SM> That's a good idea. Kind of like a future. Speaking of futures, can we have a general facility for those? 1) a real "future" type 2) a way to construct it and check if the value is available 3) process sentinel tie-in I'm sure much of this facility is either possible or already available in ELisp, I just don't know the pieces and I think it would be very convenient to provide a "future" type. WDYT? Similarly it would be very nice to provide continuations and coroutines if those are not already possible. They don't need a top-level type though, a lexical closure is sufficient I think. Please tell me how I'm wrong :) Ted