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=-3.3 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,T_SCC_BODY_TEXT_LINE, UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 24692 invoked from network); 7 Jul 2022 00:27:42 -0000 Received: from zero.zsh.org (2a02:898:31:0:48:4558:7a:7368) by inbox.vuxu.org with ESMTPUTF8; 7 Jul 2022 00:27:41 -0000 ARC-Seal: i=1; cv=none; a=rsa-sha256; d=zsh.org; s=rsa-20210803; t=1657153661; b=S3K1ngR3sOa5l7SU/BbBHDn2C+BB3uS6wmLdC7zjOzQPdDZEBfhhnqqI/tfHNVWblj0OD3GnLZ a5Piyw93nq/anIjLpbeVFffdJu0IgvKfg5yZi6OtR7Q2vatYQiFCwp3dQ7Kd0xanqJ1mZI2PcR vEgoLv2bt1AQXNNRgbtC/sjgg50tWf2wX1ohheO1yC+zrGgMAC/5wrnuJvSvHu5RajVom2zheO HNkgsHB7HCGheiHH1rMkrdnmqMnyGdT2HF03o2vU/RhhIh4VYDCyZK+MN69sDZizIgLaed/xb6 QDu4w29rMm0/3tAKQcSZ6xLbojswOPwABvLfyvPfWuzv6Q==; ARC-Authentication-Results: i=1; zsh.org; iprev=pass (mail-ej1-f49.google.com) smtp.remote-ip=209.85.218.49; dkim=pass header.d=brasslantern-com.20210112.gappssmtp.com header.s=20210112 header.a=rsa-sha256; dmarc=none header.from=brasslantern.com; arc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed; d=zsh.org; s=rsa-20210803; t=1657153661; bh=VQDF4tM/S5rVz0Wz1tVC6EL55o9vp90ZKuJaphj+ins=; h=List-Archive:List-Owner:List-Post:List-Unsubscribe:List-Subscribe:List-Help: List-Id:Sender:Content-Type:To:Subject:Message-ID:Date:From:In-Reply-To: References:MIME-Version:DKIM-Signature:DKIM-Signature; b=fTimFL+pDN5lahWz/ZOXkUj4vx+mE7LI9qb4EYhJmF54WpltufbM5MxFbYNsQWiDRTKIN+LuDQ dtMWFLQfnNN9xZ4NJxrgir/bkQ2bobBjGEVAO1cMG383BTNNJHtT6DRJX3F/OrbYsyskbkVVya GK8997qSEP4TuD2X9B+wD4FSt3v1rRZx7s2kiQ06xlqy++cO1vZorbbBL+Hud3nvEELZoh69Yv H0y5Y2xdRpydF7F/5XBej0M2i+DpQej+A3ZsXK+M3u34fcm4c7Naw4nA80uV5hvDPJO7piV13w 57zGo5Znjxqov0okK9kx+jZNKW+1uvEX0zMKOIGKAjfjFw==; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=zsh.org; s=rsa-20210803; h=List-Archive:List-Owner:List-Post:List-Unsubscribe: List-Subscribe:List-Help:List-Id:Sender:Content-Type:To:Subject:Message-ID: Date:From:In-Reply-To:References:MIME-Version:Reply-To:Cc: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID; bh=4v+TAKcdZGeDORA6sMcgx98o1dMV2oXktjDLDTGSt1w=; b=mTECg2dOfoYQk3Vm0ZE411KIJf 1UPtwAlKRfokpHNeZBt1aYawOZZosy2oSYz+m0ynBTx/go6BwxGDCx26j281MvMHvtWGVEvsk9fFb 7V6fRAO4deTubzPfx2X4jZ18QQ+KtLNBelmpC+MQrgPxCFPgVimMfkJkmuVVQR+fmzEBE4OgTyFol XnFdp46It0zIBfnQg32ylZch5YgkdgXZp9kP2sGgOlon9C1LtVCNTOVee+KjKPnksjDl21BEb57yQ zLWvqJHwMVrJ6anPPfRGu2cjqrFXY+mivUlJQKsozoi7qZxVCWkPuh3URq/JNMcPiEzuU0oLOjvkm MVPV/C9w==; Received: from authenticated user by zero.zsh.org with local id 1o9FMm-000Mrp-9W; Thu, 07 Jul 2022 00:27:36 +0000 Authentication-Results: zsh.org; iprev=pass (mail-ej1-f49.google.com) smtp.remote-ip=209.85.218.49; dkim=pass header.d=brasslantern-com.20210112.gappssmtp.com header.s=20210112 header.a=rsa-sha256; dmarc=none header.from=brasslantern.com; arc=none Received: from mail-ej1-f49.google.com ([209.85.218.49]:38531) by zero.zsh.org with esmtps (TLS1.3:TLS_AES_128_GCM_SHA256:128) id 1o9FHb-000MSG-6V; Thu, 07 Jul 2022 00:22:16 +0000 Received: by mail-ej1-f49.google.com with SMTP id g26so29737961ejb.5 for ; Wed, 06 Jul 2022 17:22:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=brasslantern-com.20210112.gappssmtp.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=4v+TAKcdZGeDORA6sMcgx98o1dMV2oXktjDLDTGSt1w=; b=aOMQWQfgUDUVCFyNSl2IQL49Ze/BAh8eMkOHKAOvIjKVYjUQWWk9RS7Nuqf44x2Yqq yzHfBiOrGE2Ywk/ViKvBCwSjB4DwgwVvRhFCtM0HBGR9B83FvIQlEDH38bPkahqabXPm nVgYwXKIgQYP/wLSe/vwTZszaNFwU6/BdJnZi1mnqharZKlQQkeUPFWrn2rfJGaQ7CkQ ULh7y2Edazngvk/6C9uGYxX/UZWOntlvTdMlmkheIOcJqnfap1xErqqqWixt44DJuLfS +D9XFTCwJAJUnWjsJ1LoSAEn9zTDJ0tJutLAPJwTeQ9iWstWcLE8onU+6jDuQMoqaFT7 QJ7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=4v+TAKcdZGeDORA6sMcgx98o1dMV2oXktjDLDTGSt1w=; b=SQFDTX/cmD5VsOk/tlEAyiHjS+mv9C+0p0uFAgbIUg4CtQaqACIhOPwJbpEMr3wiul np4RMoAsMmqPfR+CCmTOuIJvpfvpasTxL67JhwpXw+akzCWiJhBDBh+Mj8+ZuBzZH4YB WKrrvgF8faDC9YvZqxAKJtdjJ6C89cH/gbKYQSjE0lyg0YPGfEMKSJBFfcy4R4lOxmbr PocxmeSxoZODYpEjuln4JPwLR5GWySCN647//WJ8UGG22cdg6cOxlQ5NqkVNI/O0LR+P /0Jx6Bl3HfnLx8uxbRhLz66Iz+09a74k72pW8iAIgdel+3WwAL9pECtndI00UIx3dB0S fBLg== X-Gm-Message-State: AJIora8x/SgCTfKCTPbyhhj7sS/S1KQkabpvHHMI85Xvr2d+1iS+pCy2 IlSX5SKC3dmtVO8b8/z2rxN8gYS7oGFJW9vi5ezn3UNCMQo= X-Google-Smtp-Source: AGRyM1tcpgtPp+ZKYWoOwbA1zd3IZ+okxgNKfzODmgfbV2hQW3G0mlfPIyj70P9D7Te2NN3I19Pk0A5ZoqUfzT58OVw= X-Received: by 2002:a17:906:58c7:b0:722:f4bf:cb75 with SMTP id e7-20020a17090658c700b00722f4bfcb75mr42570707ejs.450.1657153334568; Wed, 06 Jul 2022 17:22:14 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Bart Schaefer Date: Wed, 6 Jul 2022 17:22:03 -0700 Message-ID: Subject: Re: Extending regexes To: Zsh hackers list Content-Type: text/plain; charset="UTF-8" X-Seq: 50407 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: On Wed, Jul 6, 2022 at 4:13 PM Phil Pennock wrote: > > A while back I wrote some bindings for using the RE2 library [...] > > My _tentative_ thinking, which I'd appreciate feedback on, is to > introduce a new special parameter, `ZSH_EQTILDE_ENGINE` or somesuch; > [...] > > Is this sane? Are we happy introducing new special parameters, as long > as the name starts `zsh`? [...] My intuition about this suggests that an interface somewhere between "enable -p $patchar" and "ztie -d $dbtype" would be more appropriate here. Something like zregex zsh/re/$flavor where the named module must implement "-$flavor-match" as a conditional. For backwards-compatibility, zsh/pcre would load zsh/re/pcre and zsh/regex would load zsh/re/regex. An option "zregex -x" (choose your x) replaces -regex-match with -$flavor-match (a no-op for zsh/re/regex) in the implementation of "=~" Leave RE_MATCH_PCRE as-is (it replaces -$flavor-match with -pcre-match when set) but document it as deprecated and perhaps print a warning if that option is set when zregex -x is called.