Path: csiph.com!goblin1!goblin.stu.neva.ru!usenet.stanford.edu!not-for-mail From: Chet Ramey Newsgroups: gnu.bash.bug Subject: Re: Incorrect / Inconsistent behavior with nameref assignments in functions Date: Mon, 31 Aug 2020 11:23:57 -0400 Organization: ITS, Case Western Reserve University Lines: 19 Approved: bug-bash@gnu.org Message-ID: References: <20200828152846.GI931@eeg.ccf.org> <2868cd77-7832-e4f7-57d2-f75a37344d85@case.edu> Reply-To: chet.ramey@case.edu NNTP-Posting-Host: lists.gnu.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Trace: usenet.stanford.edu 1598887445 32053 209.51.188.17 (31 Aug 2020 15:24:05 GMT) X-Complaints-To: action@cs.stanford.edu Cc: chet.ramey@case.edu To: bug-bash@gnu.org Envelope-to: bug-bash@gnu.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=case.edu; s=smtp-primary; t=1598887441; bh=w/ddkrgO1KLA90a2lac7ONBaoptCIVknC2GVEU+s9a8=; h=Reply-To:Cc:Subject:To:References:From:Message-ID:Date: MIME-Version:In-Reply-To:Content-Type:Content-Transfer-Encoding; 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envelope-from=chet.ramey@case.edu; helo=mpv4-2015.case.edu X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/31 11:21:27 X-ACL-Warn: Detected OS = Linux 2.4.x-2.6.x [generic] [fuzzy] X-Spam_score_int: -64 X-Spam_score: -6.5 X-Spam_bar: ------ X-Spam_report: (-6.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-2.13, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: bug-bash@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Bug reports for the GNU Bourne Again SHell List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Mailman-Original-Message-ID: <2868cd77-7832-e4f7-57d2-f75a37344d85@case.edu> X-Mailman-Original-References: <20200828152846.GI931@eeg.ccf.org> Xref: csiph.com gnu.bash.bug:16875 On 8/28/20 11:28 AM, Greg Wooledge wrote: > > You've got a local variable with the same name as the global variable > that you're attempting to pass by reference. This will not work. > > Namerefs (declare -n) in bash are *not* like uplevel commands in Tcl. > They cause the referenced variable name to be evaluated just like any > other variable would be, starting at the current function scope, then > going up to the caller, and so on. Namerefs don't change bash's dynamic variable scoping. The two conflict and make namerefs less useful than they might be. -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/