From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 13550 invoked from network); 18 Sep 2021 01:24:25 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 18 Sep 2021 01:24:25 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id DAF479CAC2; Sat, 18 Sep 2021 11:24:23 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 206819CAB3; Sat, 18 Sep 2021 11:24:05 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=iitbombay-org.20210112.gappssmtp.com header.i=@iitbombay-org.20210112.gappssmtp.com header.b="UoDGYEcL"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 229899CAB3; Sat, 18 Sep 2021 11:24:03 +1000 (AEST) Received: from mail-qk1-f171.google.com (mail-qk1-f171.google.com [209.85.222.171]) by minnie.tuhs.org (Postfix) with ESMTPS id 0B5229CAB2 for ; Sat, 18 Sep 2021 11:24:02 +1000 (AEST) Received: by mail-qk1-f171.google.com with SMTP id bk29so23076300qkb.8 for ; Fri, 17 Sep 2021 18:24:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=iitbombay-org.20210112.gappssmtp.com; s=20210112; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=pAuj4P6uNw5wOjdDucMt00/gwpEhiZUZknn3nqA1YWI=; b=UoDGYEcLTSHcOLzT00CbLb6ad4Y4m/jaAWw0B51Q/cPRuPcim1+G49O4YhaDL9YZgd dnepqvxb39Oa5idjeMZj69rG2JvzXwB9NJW0teMpUhli08mgqh8GfM9GKtC0pMrvfO3I r9CN4f+ELpkjwBxr8NDfY9u0o3rhDU1VH1ru/f2FpmTccdtP2181kLsackbLHuGy/0AY Ah0PIKUvSvbFX5S4EA5PQ1BeOtlyryj1ItOBZt6JaOKkhVxvXhfriK5xeUY8fb8TYByt tfKLl+uQ63PGaGn+wA5DMRVwSo2ch9jBfXRW/4A4wYvvK5tofP1scO9P+kBK8tE7YGsy ahAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=pAuj4P6uNw5wOjdDucMt00/gwpEhiZUZknn3nqA1YWI=; b=o+0JDWh2qveWh/5MZ1ay+4T376TlVCnakdpw4/5ZCJB2Cjc5HB2/VOhk/InvZhh4yQ sfakqEMnZdkq9foaEagvJD0x7IkYEUL1PGB9A7cbahHSIZJCqBV9FAc5U4dM8dx3YLn1 FdKA96W78jrCY9sWROR1QgyZiNLFX7AaIraO7FLqoT4Gt0nw7IOSL3hf1Cwp7Od+LBTV 4a8jPo1SP6sdnLljGm2wrugYfECptG/LP9WBbcCweA412OI/vXaNCTvVrXPxDc3alSZ3 IfSpTydBxQs27zL1entEdFPReduz9OZugatckaM/VOoYR2pGNyMjAiqfE7vEpt0lNSP0 7/WA== X-Gm-Message-State: AOAM5331xibwlURDAQsyHtx6+WlG3/4De5QPc0oH02VFBte1+t6MYkSl MewVDakl35pLmsCcqjTxAekz/dXCRR0bTDn8 X-Google-Smtp-Source: ABdhPJy8R9mlzJf0tTZIxDtx9iYFRUxlFHaIEOjKYrBfXc+65jhTbvHzl4wWr/tsedszj2C9C838Eg== X-Received: by 2002:ae9:e502:: with SMTP id w2mr13426463qkf.200.1631928241146; Fri, 17 Sep 2021 18:24:01 -0700 (PDT) Received: from smtpclient.apple (107-215-223-229.lightspeed.sntcca.sbcglobal.net. [107.215.223.229]) by smtp.gmail.com with ESMTPSA id a9sm6202557qko.27.2021.09.17.18.24.00 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 17 Sep 2021 18:24:00 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.13\)) From: Bakul Shah In-Reply-To: <20210918010352.GR59580@eureka.lemis.com> Date: Fri, 17 Sep 2021 18:23:59 -0700 Content-Transfer-Encoding: 7bit Message-Id: <1038880F-A0D6-4A51-A0F1-8434ED49C71A@iitbombay.org> References: <202109172040.18HKePMD009565@elf.torek.net> <20210918010352.GR59580@eureka.lemis.com> To: Greg 'groggy' Lehey X-Mailer: Apple Mail (2.3654.120.0.1.13) Subject: Re: [TUHS] RegExp decision for meta characters: Circumflex X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tuhs@minnie.tuhs.org Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On Sep 17, 2021, at 6:03 PM, Greg 'groggy' Lehey wrote: > > On Friday, 17 September 2021 at 13:40:25 -0700, Chris Torek wrote: >> Also worth noting, though the precise history predates my own >> experience: it's common in grammar theory to use `$` as the end >> symbol. Was this from REs using `$` as an end symbol as well, >> or did REs adopt `$` from here, or ...? > > Weren't there programming languages that used $ as a statement > terminator instead of ;? IIRC Macsyma used ; as well as $ as statement terminators. ; if you wanted to print the output of an expresion, $ if you wanted to suppress the output. But I suspect it is not related to this.