Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!goblin2!goblin.stu.neva.ru!newsfeed.xs4all.nl!newsfeed1a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.056 X-Spam-Evidence: '*H*': 0.89; '*S*': 0.00; 'mrab': 0.05; 'currently,': 0.09; 'from:addr:ethan': 0.09; 'from:addr:stoneleaf.us': 0.09; 'from:name:ethan furman': 0.09; 'message-id:@stoneleaf.us': 0.09; '~ethan~': 0.09; '"keep': 0.16; 'hmmmm....': 0.16; 'received:69.93': 0.16; 'subject:Case': 0.16; 'tempted': 0.16; 'wraps': 0.16; 'wrote:': 0.18; '>>>': 0.22; 'example': 0.22; 'header:User-Agent:1': 0.23; 'skip': 0.24; 'switch': 0.26; 'header :In-Reply-To:1': 0.27; 'am,': 0.29; 'thus': 0.29; 'went': 0.31; '>>>>': 0.31; 'default,': 0.31; 'disable': 0.31; 'cases': 0.33; 'not.': 0.33; 'but': 0.35; 'there': 0.35; 'charset:us-ascii': 0.36; 'two': 0.37; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'though,': 0.39; 'to:addr:python.org': 0.39; 'either': 0.39; 'ian': 0.60; 'received:173': 0.61; 'back': 0.62; 'more': 0.64; 'different': 0.65; 'here': 0.66; 'reply': 0.66; 'between': 0.67; 'useful.': 0.68; 'day': 0.76; 'confusion.': 0.84; 'ethan': 0.84; 'furman': 0.84; 'absolutely': 0.87; 'subject:Proposal': 0.91; 'lucas': 0.93 Date: Thu, 03 Apr 2014 19:16:24 -0700 From: Ethan Furman User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121010 Thunderbird/16.0.1 MIME-Version: 1.0 To: python-list@python.org Subject: Re: Yet Another Switch-Case Syntax Proposal References: <8084-1396540962-768613@sneakemail.com> <533DA72B.9010602@stoneleaf.us> <533E131F.6010907@mrabarnett.plus.com> In-Reply-To: <533E131F.6010907@mrabarnett.plus.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator3304.hostgator.com X-AntiAbuse: Original Domain - python.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - stoneleaf.us X-BWhitelist: no X-Source-IP: 173.12.184.233 X-Exim-ID: 1WVtgo-0001ek-MJ X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: ([173.12.184.233]) [173.12.184.233]:45399 X-Source-Auth: ethan+stoneleaf.us X-Email-Count: 1 X-Source-Cap: dG9idWs7dG9idWs7Z2F0b3IzMzA0Lmhvc3RnYXRvci5jb20= X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 38 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1396579281 news.xs4all.nl 2845 [2001:888:2000:d::a6]:35546 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:69637 On 04/03/2014 07:04 PM, MRAB wrote: > On 2014-04-03 19:23, Ethan Furman wrote: >> On 04/03/2014 09:02 AM, Lucas Malor wrote: >>> >>> In reply to Ian Kelly: >>>> >>>> Instead of disabling fallthrough by default, why not disable it all together? >>> >>> I was tempted but there are cases in which it's useful. An example >>> >>> switch day casein ("Monday", "Thursday", "Wednesday", "Tuesday", "Friday"): >>> gotowork = True >>> continue >>> casein ("Monday", "Thursday", "Wednesday", "Tuesday", "Friday"): >>> daytype = "ferial" >>> casein ("Saturday", "Sunday") >>> daytype = "festive" >> >> >> Absolutely not. Currently, the 'continue' key word means "stop processing and go back to the beginning". You would >> have it mean "keep going forward". Thus 'continue' would mean both "go backwards" and "go forwards" and would lead to >> unnecessary confusion. >> > I thought it went to the end of the loop, but because it's a loop, it > just wraps around back to the top... *sigh* I see you are already confused. ;) Hmmmm.... I think that would be more like 'skip' as in 'skip to the end'... Either way, though, 'continue' would mean two very different things: - skip everything between here and the end of the loop - don't skip everything between here and the end of the case -- ~Ethan~