From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: [RFC] Some new vector procedures (vector-{memq, apply, to-string, ...}) Date: Sun, 21 Apr 2019 17:01:55 -0400 Message-ID: References: <8736md90v0.fsf@gmail.com> <83lg05b1jk.fsf@gnu.org> <87lg047h9n.fsf@gmail.com> <87pnpf5c8u.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="93135"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Apr 21 23:07:50 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hIJgk-000O64-IE for ged-emacs-devel@m.gmane.org; Sun, 21 Apr 2019 23:07:50 +0200 Original-Received: from localhost ([127.0.0.1]:57126 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hIJgj-0000iA-Br for ged-emacs-devel@m.gmane.org; Sun, 21 Apr 2019 17:07:49 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:39723) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hIJfr-0000hv-AP for emacs-devel@gnu.org; Sun, 21 Apr 2019 17:06:56 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hIJe7-0004if-EW for emacs-devel@gnu.org; Sun, 21 Apr 2019 17:05:09 -0400 Original-Received: from [195.159.176.226] (port=34600 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hIJe5-0004hq-GV for emacs-devel@gnu.org; Sun, 21 Apr 2019 17:05:07 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.89) (envelope-from ) id 1hIJe2-000Kay-0c for emacs-devel@gnu.org; Sun, 21 Apr 2019 23:05:02 +0200 X-Injected-Via-Gmane: http://gmane.org/ Cancel-Lock: sha1:G50XMKUCROoK/5Ymq0UWLGIsgL0= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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" Xref: news.gmane.org gmane.emacs.devel:235739 Archived-At: > I'm not sure how one would avoid the allocation lambda does without a > new special form (or byte compiler optimization that checks that you > only give args to apply), but perhaps I'm overlooking something. > There could also be a &rest-vector, but that's likely going too far. I don't have any good ideas to solve that either, but I figured it was worth mentioning. > Right, I'm not under the impression that it would be a monumental > difference (that's why I called it a stupid itch :). Still, I think > there's a middle ground between lists and hash tables that vectors would > fit into nicely enough. The problem is usually in the construction phase, where it's a lot easier to construct the list, whereas for vectors you'll likely want to first construct a list and later convert it to a vector. Growable vectors would be nice, but they're a different beast (need a different low-level representation). Stefan