Path: csiph.com!goblin1!goblin.stu.neva.ru!usenet.stanford.edu!not-for-mail From: worley@alum.mit.edu (Dale R. Worley) Newsgroups: gnu.bash.bug Subject: Re: Local variable names clash with global read-only variable names. Date: Sun, 03 May 2020 21:53:52 -0400 Lines: 16 Approved: bug-bash@gnu.org Message-ID: References: <20200501113700.GC17864@eeg.ccf.org> (wooledg@eeg.ccf.org) <87imhcbh3j.fsf@hobgoblin.ariadne.com> NNTP-Posting-Host: lists.gnu.org X-Trace: usenet.stanford.edu 1588557241 20950 209.51.188.17 (4 May 2020 01:54:01 GMT) X-Complaints-To: action@cs.stanford.edu Cc: bug-bash@gnu.org To: Greg Wooledge Envelope-to: bug-bash@gnu.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcastmailservice.net; s=20180828_2048; t=1588557235; bh=CnCJ69QF+7iIsmndp3s5y3r7/2XCW8ByXFW1FNbsWgY=; h=Received:Received:Received:Received:From:To:Subject:Date: Message-ID; b=FtEaEqoilsDMzCIMiwVeo1hkDnCErZVp7kG7VdEZYE3aBcy1Oepu4PrVUZt0AZVuK DNXE6LzMdaHzwyvRJTHnOBWWXLlzRHy7FAZXv9YVbgShQW3xWFVKMU1iarHhg787K5 gRteXHrpIZxS71Ht+NTuw4GLEeY23uk/WzHyAZaGJ+Vk5i3IoZlrt8IVCEgyl1iDrB j5n5L7gna5HiFGXdjGFE8wSyHQLokPMMapOzbpJ4A8UW6dHiBLWofWD/3bghpq71u0 UPytPHNPq1Vtk7OFHm96/TJodYamaireQNOK57PVslM/VotcBUlOMfOKZrkkgWcX2R XQRDGslpGwYmA== X-Xfinity-VMeta: sc=-100.00;st=legit X-Authentication-Warning: hobgoblin.ariadne.com: worley set sender to worley@alum.mit.edu using -f In-Reply-To: <20200501113700.GC17864@eeg.ccf.org> (wooledg@eeg.ccf.org) Received-SPF: permerror client-ip=2001:558:fe21:29:69:252:207:39; envelope-from=worley@alum.mit.edu; helo=resqmta-ch2-07v.sys.comcast.net X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/03 21:53:55 X-ACL-Warn: Detected OS = ??? X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, T_SPF_PERMERROR=0.01, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN 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: <87imhcbh3j.fsf@hobgoblin.ariadne.com> Xref: csiph.com gnu.bash.bug:16271 Greg Wooledge writes: > Perl is a programming language. It makes sense that perl would evolve > in a way that makes it more useful for writing programs. > > Bash, on the other hand, is first and foremost a *shell*. It's designed > to act as an interface for executing commands, either interactively, or > in a script. Its use as a programming language is a distant second goal. Oh, yeah, I don't think it would be at all worth the trouble to implement lexical scoping in bash. My point was, that if you *don't* implement lexical scoping, you're pretty much guaranteed to get the sort of conflicts between purposes that the original message points out. And it seems that the best choice in that conflict is the current behavior. Dale