Path: csiph.com!goblin1!goblin.stu.neva.ru!usenet.stanford.edu!not-for-mail From: Chet Ramey Newsgroups: gnu.bash.bug Subject: Re: Should [[ -v 1 ]] be supported? Date: Fri, 28 Dec 2018 18:19:01 -0600 Organization: ITS, Case Western Reserve University Lines: 15 Approved: bug-bash@gnu.org Message-ID: References: <5dac2cf2-2fac-0fd1-058f-6a84a3271738@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 1546043023 26512 208.118.235.17 (29 Dec 2018 00:23:43 GMT) X-Complaints-To: action@cs.stanford.edu Cc: chet.ramey@case.edu To: Martijn Dekker , bug-bash@gnu.org Envelope-to: bug-bash@gnu.org X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:reply-to:cc:subject:to:references:from:openpgp :autocrypt:organization:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=K3tP5p4eML6/UHQ2AFqiZCHjMMT7qe9VFpSDry32b9c=; b=guzbcDBd4+Ls/CThvx6qlDShaWYaQUsSMdaMWMqH04Dn0b/sF5NwNbspKiZEz2IcEI rB/gv0k3K7vtPXx3sm1ntxBIpy5gETL1PvtLrMU/B8mzWxwvIsxeeHaPzOAXpgMpJe/H H9C7HUliOOMFYCqpQPxc/WikIN8cX9pgLvBMlP+7jbU/Bj9qUCIUwE97t0oERYv2lVR4 olUxnM9umlveGKd2u6sZfo/WfRfUKo4cjHQoI4qLBrP9VU6y5ZOc64yngiCyXbL3SZM/ rt8gNjlJvv8mIYgx7Ua1Mmt560uNIjcYO32UEaNLC0uxZsNAvNHTWLQfVdj+ZIuWTNxQ q9Mg== X-Gm-Message-State: AA+aEWbecSmP/M9jgIjsEGq1kAPfkrY37Ig4Phe0+FWmAStbwgwBFx6P pOxb9fhLPfdem03vynq/kN+C7/0ibogFKX6HTe3to9BTuhYoV3cx8SYSruq8RSSlsZ0ybpjt/CA UG1zSmmlk8D8= X-Received: by 2002:a24:4352:: with SMTP id s79mr19216222itb.43.1546042743894; Fri, 28 Dec 2018 16:19:03 -0800 (PST) X-Google-Smtp-Source: ALg8bN5J/6NEfd7/ZrP/UFVtZFcDLnurPo28Uv/irAX9Tvhf4BXHfkU/KMy8GQlWwXDiM06/ccrH9A== X-Received: by 2002:a24:4352:: with SMTP id s79mr19216216itb.43.1546042743670; Fri, 28 Dec 2018 16:19:03 -0800 (PST) Openpgp: preference=signencrypt Autocrypt: addr=chet.ramey@case.edu; prefer-encrypt=mutual; keydata= mQGiBEEOsGwRBACFa0A1oa71HSZLWxAx0svXzhOZNQZOzqHmSuGOG92jIpQpr8DpvgRh40Yp AwdcXb8QG1J5yGAKeevNE1zCFaA725vGSdHUyypHouV0xoWwukYO6qlyyX+2BZU+okBUqoWQ koWxiYaCSfzB2Ln7pmdys1fJhcgBKf3VjWCjd2XJTwCgoFJOwyBFJdugjfwjSoRSwDOIMf0D /iQKqlWhIO1LGpMrGX0il0/x4zj0NAcSwAk7LaPZbN4UPjn5pqGEHBlf1+xDDQCkAoZ/VqES GZragl4VqJfxBr29Ag0UDvNbUbXoxQsARdero1M8GiAIRc50hj7HXFoERwenbNDJL86GPLAQ OTGOCa4W2o29nFfFjQrsrrYHzVtyA/9oyKvTeEMJ7NA3VJdWcmn7gOu0FxEmSNhSoV1T4vP2 1Wf7f5niCCRKQLNyUy0wEApQi4tSysdz+AbgAc0b/bHYVzIf2uO2lIEZQNNt+3g2bmXgloWm W5fsm/di50Gm1l1Na63d3RZ00SeFQos6WEwLUHEB0yp6KXluXLLIZitEJLQwQ2hldCBSYW1l eSAoQ2FzZSBzdGFuZGFyZCkgPGNoZXQucmFtZXlAY2FzZS5lZHU+iF8EExECAB8FAkPi19EC GwMHCwkIBwMCAQMVAgMDFgIBAh4BAheAAAoJELtYafBk6nSrelkAn31Gsuib7GcCZHbv5L5t VKYR9LklAJ4hzUHKA49Z0QXR+qCb80osIcmPSbkBDQRBDrBvEAQAkK6TAOKBEM+EC4j6V/7o /riVZqcgU5cid2qG9TXdwNtD9a3kvA/ObZBO93sX59wc6Bnwo4VJxsOmMlpGrAjJsxNwg3QH akEtf8LXRbVpj5xStdmBdQZUhIQyalo/2/TZq5OijtddUQcL5cs70hTv/FpT3wUvr2Xr8rjF 41IFEz8AAwcD/A0CZEGlzIrT5WCBnl6xBog/8vKiUCbarByat3d1mL6DbizvKNXQRTC9E/vE dENAWCQCjr75Bu55xT8n3SXGtWdDC5xmZ/P3OBYORP8yl8H8I1FIosWOFirbIeYdZPq8SPD1 HL+EXo9zSiHVrrZRJ19ooCKKbSdXHFCY+aJG+0KZiEkEGBECAAkFAkEOsG8CGwwACgkQu1hp 8GTqdKvjcACfZlkVCDwaz/NTO9cy3t69oWpVPNwAnRwe0qk/WL/gfhH346xh5B3HFbFN User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.3.3 In-Reply-To: Content-Language: en-US X-Junkmail-Status: score=7/90, host=mpv3-2015.case.edu X-Junkmail-PrAS-Raw: score=7/90, refid=2.7.2:2018.12.28.235116:17:7.944, ip=, rules=__YOUTUBE_RCVD, __X_GOOGLE_DKIM_SIGNATURE, __HAS_REPLYTO, __HAS_CC_HDR, __PHISH_SPEAR_SUBJ_TEAM, __SUBJ_REPLY, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __TO_MALFORMED_2, __TO_NAME, __TO_NAME_DIFF_FROM_ACC, __REFERENCES, __HAS_FROM, FROM_EDU_TLD, __HAS_MSGID, __SANE_MSGID, DATE_TZ_NA, __USER_AGENT, __MOZILLA_USER_AGENT, __MIME_VERSION, __IN_REP_TO, __CT, __CT_TEXT_PLAIN, __CTE, __REPLYTO_SAMEAS_FROM_ADDY, __REPLYTO_SAMEAS_FROM_ACC, __FROM_DOMAIN_IN_ANY_CC1, __FROM_DOMAIN_IN_ANY_CC2, __REPLYTO_SAMEAS_FROM_DOMAIN, __ANY_URI, __URI_WITH_PATH, __URI_NO_WWW, __CP_URI_IN_BODY, __FRAUD_MONEY_CURRENCY_DOLLAR, __SUBJ_ALPHA_NEGATE, __URI_IN_BODY, __URI_NOT_IMG, __FORWARDED_MSG, __NO_HTML_TAG_RAW, BODY_SIZE_600_699, BODYTEXTP_SIZE_3000_LESS, __MIME_TEXT_P1, __MIME_TEXT_ONLY, __URI_NS, HTML_00_01, HTML_00_10, __FRAUD_MONEY_CURRENCY, BODY_SIZE_5000_LESS, [TRUNCATED], so=2010-03-03 19:42:08, dmn=2016-08-03-0138 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] [fuzzy] X-Received-From: 129.22.103.194 X-BeenThere: bug-bash@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Bug reports for the GNU Bourne Again SHell List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Xref: csiph.com gnu.bash.bug:14992 On 12/27/18 3:11 PM, Martijn Dekker wrote: > Consistency might be a better argument. If [[ -v foo ]] is equivalent to [[ > -n ${foo+s} ]] for variables (with the advantage that you don't need 'eval' > to handle arbitrary values of 'foo'), then perhaps it's not unreasonable to > expect [[ -v 1 ]] to be equivalent to [[ -n ${1+s} ]]. The completeness argument is more rigorous, and there's a case to add this in a future version of bash. He didn't make that argument, though. -- ``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/