From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965119Ab2CUJwU (ORCPT ); Wed, 21 Mar 2012 05:52:20 -0400 Received: from mail-we0-f174.google.com ([74.125.82.174]:42163 "EHLO mail-we0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758091Ab2CUJwP (ORCPT ); Wed, 21 Mar 2012 05:52:15 -0400 Date: Wed, 21 Mar 2012 10:52:11 +0100 From: Ingo Molnar To: Peter Zijlstra Cc: Jiri Olsa , acme@redhat.com, mingo@elte.hu, paulus@samba.org, cjashfor@linux.vnet.ibm.com, fweisbec@gmail.com, linux-kernel@vger.kernel.org, Thomas Gleixner Subject: Re: [PATCH 3/3] perf, tool: Add new event group management Message-ID: <20120321095211.GA11122@gmail.com> References: <1332267341-26338-1-git-send-email-jolsa@redhat.com> <1332267341-26338-4-git-send-email-jolsa@redhat.com> <1332269081.18960.444.camel@twins> <20120320204625.GA17142@gmail.com> <1332321311.18960.474.camel@twins> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1332321311.18960.474.camel@twins> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Peter Zijlstra wrote: > # echo {} > {} > # echo {en,dis}able > enable disable > > > It somehow special cases {}, which is horrible. Oh, indeed: brace expansion and sequence expressions both use curly braces: $ echo foo-{a,b,c}-bar foo-a-bar foo-b-bar foo-c-bar $ echo {1..10} 1 2 3 4 5 6 7 8 9 10 Too bad, it would be rather intuitive. All the brace characters are taken by Bash. Maybe something like: $ echo /minor-faults,major-faults/ /minor-faults,major-faults/ although it looks a bit weird. So ... how about using another grouping operator, such as '+'? Something like: -e minor-faults+major-faults While when comma separated they are not grouped, or so. ? Thanks, Ingo