Path: csiph.com!usenet.pasdenom.info!nntpfeed.proxad.net!proxad.net!feeder1-2.proxad.net!news.tele.dk!news.tele.dk!small.news.tele.dk!newsgate.cistron.nl!newsgate.news.xs4all.nl!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 0.017 X-Spam-Evidence: '*H*': 0.97; '*S*': 0.00; 'from:addr:yahoo.co.uk': 0.05; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'stack': 0.13; 'gregory': 0.16; 'iirc': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'wrote:': 0.16; 'language': 0.19; 'lawrence': 0.22; 'header:In-Reply-To:1': 0.24; 'header :User-Agent:1': 0.26; 'header:X-Complaints-To:1': 0.26; 'tail': 0.29; 'subject:/': 0.30; 'putting': 0.30; 'language.': 0.32; 'something': 0.35; 'to:addr:python-list': 0.36; 'subject:: ': 0.37; 'really': 0.37; 'thanks': 0.37; 'received:org': 0.37; 'to:addr:python.org': 0.40; 'mark': 0.40; 'charset:windows-1252': 0.62; 'our': 0.64; 'pythonistas,': 0.84; 'received:as9105.com': 0.84; 'received:dsl.as9105.com': 0.84; 'received:dynamic.dsl.as9105.com': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Mark Lawrence Subject: Re: Possibly Pythonic Tail Call Optimization (TCO/TRE) Date: Thu, 16 Jul 2015 00:34:51 +0100 References: <55A3A853.4040006@rece.vub.ac.be> <55A3C366.6060602@rece.vub.ac.be> <87fv4r1fre.fsf@jester.gateway.sonic.net> <87bnff1eks.fsf@jester.gateway.sonic.net> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: 80-42-230-191.dynamic.dsl.as9105.com User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 In-Reply-To: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.20+ 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: 17 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1437003310 news.xs4all.nl 2896 [2001:888:2000:d::a6]:51517 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:93887 On 15/07/2015 23:34, Gregory Ewing wrote: > Mark Lawrence wrote: >> IIRC the realms of the C setjmp and longjmp. > > Not really the same thing. A longjmp chops the stack > back, whereas a tail call avoids putting something on > the stack to begin with. > Thanks for that :) -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence