From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E9FF6C433E0 for ; Thu, 4 Jun 2020 07:32:25 +0000 (UTC) Received: from isis.lip6.fr (isis.lip6.fr [132.227.60.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6FB6120663 for ; Thu, 4 Jun 2020 07:32:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6FB6120663 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=inria.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=cocci-bounces@systeme.lip6.fr Received: from systeme.lip6.fr (systeme.lip6.fr [132.227.104.7]) by isis.lip6.fr (8.15.2/8.15.2) with ESMTP id 0547WLlQ012326; Thu, 4 Jun 2020 09:32:21 +0200 (CEST) Received: from systeme.lip6.fr (systeme.lip6.fr [127.0.0.1]) by systeme.lip6.fr (Postfix) with ESMTP id 72F677567; Thu, 4 Jun 2020 09:32:21 +0200 (CEST) Received: from isis.lip6.fr (isis.lip6.fr [132.227.60.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by systeme.lip6.fr (Postfix) with ESMTPS id 00BEE5D47 for ; Thu, 4 Jun 2020 09:32:19 +0200 (CEST) Received: from mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83]) by isis.lip6.fr (8.15.2/8.15.2) with ESMTPS id 0547WJgR004563 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Thu, 4 Jun 2020 09:32:19 +0200 (CEST) X-IronPort-AV: E=Sophos;i="5.73,471,1583190000"; d="scan'208";a="452900295" Received: from abo-173-121-68.mrs.modulonet.fr (HELO hadrien) ([85.68.121.173]) by mail2-relais-roc.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 04 Jun 2020 09:31:47 +0200 Date: Thu, 4 Jun 2020 09:31:46 +0200 (CEST) From: Julia Lawall X-X-Sender: jll@hadrien To: Denis Efremov In-Reply-To: <8e45d3b0-61d5-3e3a-b93e-8ffc67462476@ispras.ru> Message-ID: References: <5149c7dd-2771-e592-c5da-f36cca725a4e@ispras.ru> <8e45d3b0-61d5-3e3a-b93e-8ffc67462476@ispras.ru> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="8323329-1968219852-1591255907=:2577" X-Greylist: Sender IP whitelisted, Sender e-mail whitelisted, not delayed by milter-greylist-4.4.3 (isis.lip6.fr [132.227.60.2]); Thu, 04 Jun 2020 09:32:22 +0200 (CEST) X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.4.3 (isis.lip6.fr [132.227.60.2]); Thu, 04 Jun 2020 09:32:19 +0200 (CEST) X-Scanned-By: MIMEDefang 2.78 on 132.227.60.2 X-Scanned-By: MIMEDefang 2.78 on 132.227.60.2 Cc: Coccinelle Subject: Re: [Cocci] How to match a part of a rule expression (documentation) X-BeenThere: cocci@systeme.lip6.fr X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cocci-bounces@systeme.lip6.fr Errors-To: cocci-bounces@systeme.lip6.fr This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --8323329-1968219852-1591255907=:2577 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT On Thu, 4 Jun 2020, Denis Efremov wrote: > On 6/3/20 10:45 PM, Julia Lawall wrote: > > subE is a expressionof whatever expression was previously matched to E in > > the rule ifm. <= can only be used when the metavariable on the right side > > is inherited from another rule. Ths is probably what you want for your > > problem. > > In this case I don't understand the difference between: > > "expression ifm.E" and "expression subE <= ifm.E" subE should match any subexpression of ifm.E. If you have a concrete example (code and semantic patch) where it is not doing that, I can look at it. I haven't used this feature very much. julia > > For example, in kfree.cocci: > > @r exists@ > expression free.E, subE<=free.E, E2; > expression E1; > ... > @@ > > ( > * kfree@p1(E,...) > | > * kzfree@p1(E,...) > ) > ... > ( >  iter(...,subE,...) S // no use > | >  list_remove_head(E1,subE,...) > | >  subE = E2 > > > Regards, > > Denis > > --8323329-1968219852-1591255907=:2577 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Cocci mailing list Cocci@systeme.lip6.fr https://systeme.lip6.fr/mailman/listinfo/cocci --8323329-1968219852-1591255907=:2577--