From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: John Cowan Newsgroups: gmane.lisp.guile.user Subject: Re: A value for "nothing" Date: Fri, 14 Sep 2018 20:26:25 -0400 Message-ID: References: <8995890.4T62A8Hj0k@aleksandar-ixtreme-m5740> <2244446.TfDt2vcRxf@aleksandar-ixtreme-m5740> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Trace: blaine.gmane.org 1536971102 32016 195.159.176.226 (15 Sep 2018 00:25:02 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 15 Sep 2018 00:25:02 +0000 (UTC) Cc: guile-user@gnu.org To: hiphish@posteo.de Original-X-From: guile-user-bounces+guile-user=m.gmane.org@gnu.org Sat Sep 15 02:24:58 2018 Return-path: Envelope-to: guile-user@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1g0yON-0008C4-JG for guile-user@m.gmane.org; Sat, 15 Sep 2018 02:24:55 +0200 Original-Received: from localhost ([::1]:53887 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g0yQT-0001XS-Ng for guile-user@m.gmane.org; Fri, 14 Sep 2018 20:27:05 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:46656) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1g0yQ3-0001XI-RL for guile-user@gnu.org; Fri, 14 Sep 2018 20:26:40 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1g0yQ2-0000CM-UP for guile-user@gnu.org; Fri, 14 Sep 2018 20:26:39 -0400 Original-Received: from mail-wm1-x32a.google.com ([2a00:1450:4864:20::32a]:39240) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1g0yQ2-00009F-Jd for guile-user@gnu.org; Fri, 14 Sep 2018 20:26:38 -0400 Original-Received: by mail-wm1-x32a.google.com with SMTP id q8-v6so3621878wmq.4 for ; Fri, 14 Sep 2018 17:26:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ccil-org.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=86miDjFBsShtei6CddtON4qcshjaRGezhzUdgrxEC0s=; b=fKLUFAKoWF8UMrHVaxK+hYrYwe9QGQdIXnvSD35IltZO4N/uIWLxgHdKQ8kJP0EFDD dTvtcD1Lj4+3v4V33BZ5+DVJX2gIfUBoxiE0z6yBIpVuci8PnwU3yVJxeeXcnHBLSE4f sCfAy2rBpbBKpNh2m9WG4UEN9IvVxwgAnAlcwyE0P1nn1vQrYLUfqgccjFuTyjbfOv+5 MoOXEkCXBqvhx4Svjcvm/OWvz729Kbh3eGi1NYAwlr4k1+srHzKS5DHicNXxe1bUvCnN jKllTlMce1zRJqNmdtnSruXGTKxFWMlpvVG5ek+KtS9EPxF1Y4dlquhUHM2qhOtMBPcV cuHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=86miDjFBsShtei6CddtON4qcshjaRGezhzUdgrxEC0s=; b=ITKfuGtzcR0PRFH+lBOenkqq5GkFSC410pUnY0cyfd7TgOYinPToPVlaAfXdX/QihP nf3eheHbMbQeNzZyu/X8XdhtwtlHmOEir5N23iSYC1W4/81j69v7BknJjHu7UPaRNlv4 GHxiiel3pYstCQp5Eq0sFm4xLhbYmWdpLRK2uBfdx6kuvFSvKXe/OFV5XqusXKBR8I6c W/Q0EmVfbt+JcLJDO3ajUhZ22I7m6Th9ZVBLQsMt2wpYlCa/l9P+2Kq9wmYTCylT2oj5 AOPCzuhyHrv+0HqOezy3WggmV9Zp9na3CUpLC30ukeMvMgKXharuighwNZZUXZrf2nwH DMIg== X-Gm-Message-State: APzg51BI4gOmg+pWiRHCXQYic852dullaDlseaESPu83U87KJozdm1ZD z/kXzyZFBtToasfwpnP+CdyN/ZGFHOXNYUFQg4cwUw== X-Google-Smtp-Source: ANB0VdbuIv5EPStSPVkHtwyyvzDYilQYxTRk8jG4/noVamk7h4KoSG0aHiwqVTEnG4Emnv/7iAjgVbyT3G7EaBmHHD4= X-Received: by 2002:a1c:b441:: with SMTP id d62-v6mr4131067wmf.17.1536971196943; Fri, 14 Sep 2018 17:26:36 -0700 (PDT) In-Reply-To: <2244446.TfDt2vcRxf@aleksandar-ixtreme-m5740> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::32a X-Content-Filtered-By: Mailman/MimeDel 2.1.21 X-BeenThere: guile-user@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: General Guile related discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guile-user-bounces+guile-user=m.gmane.org@gnu.org Original-Sender: "guile-user" Xref: news.gmane.org gmane.lisp.guile.user:14876 Archived-At: You're right about null? being a problem. `Nothing` suggests an option type. What about 'nada' or 'nix'? On Fri, Sep 14, 2018 at 6:45 PM HiPhish wrote: > 1) Huh, I didn't think this would work because the record type is already > nil, > but apparently it does. Good to know > > 2) `null` is bad because the predicate would be `null?`, which collides > even > worse with Scheme. Any other suggestions? `nothing`? `nul` with one ell? I > think it would be too easy for people to miss that one letter and be > confused > why things don't work as they should. The MessagePack spec calls the type > `nil`: > https://github.com/msgpack/msgpack/blob/master/spec.md#nil-format > > > John Cowan wrote: > > 1) Some Schemes don't support rename on export. Just give the procedure > > the name you want it to have. > > > > 2) Please don't use nil as a name. Many Schemers pronounce (), the > > external representation of the empty list, as "nil". Use null or > something > > else. > > >