Path: csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!border3.nntp.dca.giganews.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!news.giganews.com.POSTED!not-for-mail NNTP-Posting-Date: Thu, 02 Jun 2011 15:21:10 -0500 From: Pete Becker Organization: Roundhouse Consulting, Ltd. Newsgroups: comp.lang.c++ Date: Thu, 2 Jun 2011 10:21:11 -1000 Message-ID: <2011060210211182589-pete@versatilecodingcom> References: <4de78326$0$6554$9b4e6d93@newsspool4.arcor-online.net> <4de7ee37$0$7626$9b4e6d93@newsspool1.arcor-online.net> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: Casting template argument User-Agent: Unison/2.1.4 Lines: 26 X-Usenet-Provider: http://www.giganews.com X-Trace: sv3-BoaISBTNWYuYno1QhaUVoIJ9iYtBGIj6jEzum2YMhXsQmyN7+HG9oZ6FN+shD586zZZ6myC1JMZp9bi!hfFpoyqNFf40q2mUp7dTEyY6SeIprRYeUB5Z+n4ikykQlgQL+M06zWRPt92Sk5B3q1KfGm4= X-Complaints-To: abuse@giganews.com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 X-Original-Bytes: 2213 Xref: x330-a1.tempe.blueboxinc.net comp.lang.c++:6093 On 2011-06-02 10:10:30 -1000, Marcel Müller said: > > Well, the application is platform dependent for other, functional > reasons anyway. The reinterpret cast from const data* to const char* is > AFAIK no UB. But this does not automatically apply to casting the > function pointer to a function with another argument type. On my target > platform it makes no difference. All pointers arguments except for > member function pointers are treated in the same way. So what is UB in > general is not necessarily UB on this specific platform. > Undefined behavior arises from valid code constructs for which the C++ language definition does not impose any requirements. That doesn't depend in any way on the compiler that you're using or on the target platform. The *consequences* of using code whose behavior is undefined depend on the compiler and the platform. -- Pete Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of "The Standard C++ Library Extensions: a Tutorial and Reference (www.petebecker.com/tr1book)