Date: Thu, 6 Sep 2001 16:49:46 +0100 From: David Malone <dwmalone@maths.tcd.ie> To: Mark Murray <mark@grondar.za> Cc: Maxim Sobolev <sobomax@FreeBSD.ORG>, markm@FreeBSD.ORG, cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/usr.bin/su Makefile su.c Message-ID: <20010906164946.A94377@walton.maths.tcd.ie> In-Reply-To: <200109051017.f85AH2k99078@grimreaper.grondar.za>; from mark@grondar.za on Wed, Sep 05, 2001 at 11:17:01AM %2B0100 References: <200109041844.f84Iijw98897@vega.vega.com> <200109051017.f85AH2k99078@grimreaper.grondar.za>
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> Now how do you get (variable) stuff into a 'const char *'? > > For example - a function is not allowed to modify its arguments, so > they are const, but the stuff being passed in is by no means constant. > That one is easy - you can pass a 'foo *' into a 'const foo *'. Now, > how do you build up a 'const foo *' in such a way that you can, but > nobody else can? You build it up in a char * and then assign it to a const char *. Or am I missing something? (There are some more compilcated issues with constness with functions like strchr. It takes a const char * and derives a char *, its return value, from it.) David. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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