From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: why are there [v e c t o r s] in Lisp? Date: Sat, 17 Oct 2015 23:12:03 +0200 Message-ID: <87eggtw670.fsf@debian.uxu> References: <87mvvjeg29.fsf@kuiper.lan.informatimago.com> <87io67pmr7.fsf@debian.uxu> <87mvvjzgup.fsf@fastmail.com> <87d1wfplu5.fsf@debian.uxu> <87io67zfl0.fsf@fastmail.com> <87twpqcl8c.fsf@kuiper.lan.informatimago.com> <87wpulbjps.fsf@kuiper.lan.informatimago.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1445115799 16169 80.91.229.3 (17 Oct 2015 21:03:19 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 17 Oct 2015 21:03:19 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Oct 17 23:03:10 2015 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZnYd9-0004EF-Ur for geh-help-gnu-emacs@m.gmane.org; Sat, 17 Oct 2015 23:03:08 +0200 Original-Received: from localhost ([::1]:59745 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZnYd9-0001j2-AK for geh-help-gnu-emacs@m.gmane.org; Sat, 17 Oct 2015 17:03:07 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:38591) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZnYcw-0001ix-IJ for help-gnu-emacs@gnu.org; Sat, 17 Oct 2015 17:02:55 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZnYcs-0004Ax-IH for help-gnu-emacs@gnu.org; Sat, 17 Oct 2015 17:02:54 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:44222) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZnYcs-0004At-BK for help-gnu-emacs@gnu.org; Sat, 17 Oct 2015 17:02:50 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZnYcq-0003ti-SY for help-gnu-emacs@gnu.org; Sat, 17 Oct 2015 23:02:48 +0200 Original-Received: from nl106-137-244.student.uu.se ([130.243.137.244]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 17 Oct 2015 23:02:48 +0200 Original-Received: from embe8573 by nl106-137-244.student.uu.se with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 17 Oct 2015 23:02:48 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Original-Lines: 31 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: nl106-137-244.student.uu.se Mail-Copies-To: never User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) Cancel-Lock: sha1:4twqkue8etOLUuuuJ54i8AJqQFE= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:107723 Archived-At: "Pascal J. Bourguignon" writes: > As I said, you could write a compiler performing > global analysis to determine how you use a given > object in the data flow, and therefore store the > literal as a list or as a vector. > > One complication would be I/O. The data flow > analysis could let the compiler determine that some > object read shall be stored as a vector or as list, > but the reading function wouldn't know that from the > external syntax, and it would need an additionnal > type parameter. > > Notice that this introduces some kind of static > typing which is rather contrary to the lisp spirit > and makes thing so bad in serializing non-lisp > like languages. > > At this point, the best you could do is to start > writing your own compiler to implement this idea, > and see whether it's a good idea or not. I'm not suggesting anyone do this. It sounds to much like the C preprocessor. The gain is diffuse from where I sit. -- underground experts united http://user.it.uu.se/~embe8573