Re: Pointers

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Article #2398

#2398

From: Barry Margolin
Date: Fri, 13 Nov 1992 17:43

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In article <mwm.2mib@contessa.palo-alto.ca.us> mwm@contessa.palo-alto.ca.us (Mike Meyer) writes:
>In <1dujcuINNru4@early-bird.think.com>, barmar@think.com (Barry Margolin) wrote:
>> C function pointers aren't like any other pointers in the language.  You
>> can't do pointer arithmetic on them.
>
>Actually, you *can* do arithmetic on them. It's just not very
>portable. I've actually seen this done in production C code.

That's an implementation extension, not part of the language.  As such,
there are few constraints on how the extension is provided.  If C didn't
use pointer notation for its procedure variable declarations, an
implementation could provide an extensions that allows arithmetic on
procedure variables.
-- 
Barry Margolin
System Manager, Thinking Machines Corp.

barmar@think.com          {uunet,harvard}!think!barmar

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Path: arc1-ca.pugleaf.net!sparky!uunet!think.com!barmar
From: barmar@think.com (Barry Margolin)
Newsgroups: comp.lang.misc
Subject: Re: Pointers
Date: 13 Nov 1992 17:43:58 GMT
Organization: Thinking Machines Corporation, Cambridge MA, USA
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