Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > comp.lang.python > #69604

Re: Yet Another Switch-Case Syntax Proposal

Path csiph.com!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!us.feeder.erje.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.datemas.de!rt.uk.eu.org!newsfeed.xs4all.nl!newsfeed4a.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path <ethan@stoneleaf.us>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.049
X-Spam-Evidence '*H*': 0.91; '*S*': 0.01; '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; 'received:69.93': 0.16; 'subject:Case': 0.16; 'tempted': 0.16; 'wrote:': 0.18; 'example': 0.22; 'header:User-Agent:1': 0.23; 'switch': 0.26; 'header:In- Reply-To:1': 0.27; 'am,': 0.29; 'thus': 0.29; 'default,': 0.31; 'disable': 0.31; 'cases': 0.33; 'not.': 0.33; 'but': 0.35; 'there': 0.35; 'charset:us-ascii': 0.36; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'ian': 0.60; 'received:173': 0.61; 'back': 0.62; 'reply': 0.66; 'useful.': 0.68; 'day': 0.76; 'confusion.': 0.84; 'absolutely': 0.87; 'subject:Proposal': 0.91; 'lucas': 0.93
Date Thu, 03 Apr 2014 11:23:39 -0700
From Ethan Furman <ethan@stoneleaf.us>
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>
In-Reply-To <8084-1396540962-768613@sneakemail.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 1WVmJJ-0006WH-4E
X-Source
X-Source-Args
X-Source-Dir
X-Source-Sender ([173.12.184.233]) [173.12.184.233]:43547
X-Source-Auth ethan+stoneleaf.us
X-Email-Count 2
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 <python-list.python.org>
List-Unsubscribe <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive <http://mail.python.org/pipermail/python-list/>
List-Post <mailto:python-list@python.org>
List-Help <mailto:python-list-request@python.org?subject=help>
List-Subscribe <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups comp.lang.python
Message-ID <mailman.8852.1396550862.18130.python-list@python.org> (permalink)
Lines 23
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1396550862 news.xs4all.nl 2956 [2001:888:2000:d::a6]:59017
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:69604

Show key headers only | View raw


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.

--
~Ethan~

Back to comp.lang.python | Previous | NextNext in thread | Find similar | Unroll thread


Thread

Re: Yet Another Switch-Case Syntax Proposal Ethan Furman <ethan@stoneleaf.us> - 2014-04-03 11:23 -0700
  Re: Yet Another Switch-Case Syntax Proposal Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-04-04 08:33 +0000
    Re: Yet Another Switch-Case Syntax Proposal Marko Rauhamaa <marko@pacujo.net> - 2014-04-04 12:46 +0300
      Re: Yet Another Switch-Case Syntax Proposal Ian Kelly <ian.g.kelly@gmail.com> - 2014-04-04 10:02 -0600
        Re: Yet Another Switch-Case Syntax Proposal Marko Rauhamaa <marko@pacujo.net> - 2014-04-04 19:44 +0300
          Re: Yet Another Switch-Case Syntax Proposal Ian Kelly <ian.g.kelly@gmail.com> - 2014-04-04 11:55 -0600

csiph-web