From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-23780-ml=inbox.vuxu.org@zsh.org>
X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=-1.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID,
	DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE
	autolearn=ham autolearn_force=no version=3.4.2
Received: from primenet.com.au (ns1.primenet.com.au [203.24.36.2])
	by inbox.vuxu.org (OpenSMTPD) with ESMTP id d08b56a2
	for <ml@inbox.vuxu.org>;
	Mon, 3 Dec 2018 02:39:01 +0000 (UTC)
Received: (qmail 5494 invoked by alias); 3 Dec 2018 02:38:49 -0000
Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Users List <zsh-users.zsh.org>
List-Post: <mailto:zsh-users@zsh.org>
List-Help: <mailto:zsh-users-help@zsh.org>
List-Unsubscribe: <mailto:zsh-users-unsubscribe@zsh.org>
X-Seq: 23780
Received: (qmail 19009 invoked by uid 1010); 3 Dec 2018 02:38:49 -0000
X-Qmail-Scanner-Diagnostics: from mail-it1-f178.google.com by f.primenet.com.au (envelope-from <pengyu.ut@gmail.com>, uid 7791) with qmail-scanner-2.11 
 (clamdscan: 0.100.2/25112. spamassassin: 3.4.2.  
 Clear:RC:0(209.85.166.178):SA:0(-2.0/5.0):. 
 Processed in 0.986746 secs); 03 Dec 2018 02:38:49 -0000
X-Envelope-From: pengyu.ut@gmail.com
X-Qmail-Scanner-Mime-Attachments: |
X-Qmail-Scanner-Zip-Files: |
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20161025;
        h=mime-version:from:date:message-id:subject:to;
        bh=3/RseflqQv3mVlpT6DCa5VPRq4YcE8pd9GmbdJ3HD8s=;
        b=Msu7Px92sQwPdJuojP5w9JjEHqIAZndCupNYdlBNQbyi1cezPSlf5PwcZqaeJFwlan
         wnC/MLnKxWMK8b6P7hW0Yzll4m8wHnyNVeTXgoCWDR//Cbd2sfln0UVRf2b7OFOpUUU0
         YBmV+j6JjJCXyFdVMVp05gTDiI5TECssI9H0YQPgoy0w/m3UZwNUpT4Qt8iQF3zrJj6A
         CJn2liXmzdK5sTLTNUoqmTDwuwzTUuXb2q90HKTewRo9C8/rVvN2bFqycx/w+6KbOkaj
         i56g8SqFkED2AxBKRQWsShSFKaa6Sx0Mugzjl+iHS5Bmdstw9wqZ5nkHh6XodbvbERJN
         9DRA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20161025;
        h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
        bh=3/RseflqQv3mVlpT6DCa5VPRq4YcE8pd9GmbdJ3HD8s=;
        b=cmVy/NM2cAiJGJ0+jwS3o0YYTEG8pn+iC23bdkT4YVfqvruu4Ke+IYZTS7pzRELDnG
         oneEkaHtumtjf+g8N73Y9SQToWs/E81+laZJdgDFSeAaXFg65B8cXeBdByyq1ume4BW+
         xwKWdVvjUVoRGK0VYyIQNA83AM38/hd9AxSnqOmR6PxTjSUqYeSJ59tfY8bUlYke6RVA
         TuTX2aIPfF3AkFyoBuuNTZj+8N9bmHhL+b1hBuZNX6XePi2fIxU8iemg9t9o7+jqzidN
         sHkT6RrA3LuxAyaeBiR0bA6JLEHYx6ylv4+NFi8vSS7LA+8yRMkw2j8Os1ml4RO46xhq
         pyrw==
X-Gm-Message-State: AA+aEWbDxVnW6vrAH9VqckJ0ICs4UB2F4q1XAmhoMNa1bj8jDzoPi4d9
	qh+wMDuXEO0A9JSxqyU2auLZWB6IMtMUkoIpCqygpQ==
X-Google-Smtp-Source: AFSGD/X4endickvSdmCs+eVTL9D/Jjk4fG4Pn3SRLYZsWala3F6R+imb+20+pT6MHjAJKXp/LvztPtAo20LxeC5EQkI=
X-Received: by 2002:a24:ce45:: with SMTP id v66-v6mr6100219itg.26.1543804725175;
 Sun, 02 Dec 2018 18:38:45 -0800 (PST)
MIME-Version: 1.0
From: Peng Yu <pengyu.ut@gmail.com>
Date: Sun, 2 Dec 2018 20:38:44 -0600
Message-ID: <CABrM6wmeG8mT2ke6+ObQAqY7qTqxKnb2GyD1f5AGb141m0hkyQ@mail.gmail.com>
Subject: Why local is needed?
To: zsh-users <zsh-users@zsh.org>
Content-Type: text/plain; charset="UTF-8"

Hi,

It seems that the variables used in a function by default are local
anyway. Does it mean that the command `local` is never necessary in a
function if the variables are specified as local variables? Thanks.

$ cat  ./main.sh
#!/usr/bin/env zsh
# vim: set noexpandtab tabstop=2:

set -v
function f {
	x=1
	y=(a b c)
}

declare -p x y
$   ./main.sh
function f {
	x=1
	y=(a b c)
}

declare -p x y
./main.sh:declare:10: no such variable: x
./main.sh:declare:10: no such variable: y

-- 
Regards,
Peng