Rainer Deyke root at rainerdeyke.com
Mon Nov 20 21:20:38 EST 2000

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"James Logajan" <JamesL at Lugoj.Com> wrote in message
news:3A19BFCC.4DF9EA3 at Lugoj.Com...
> Gareth McCaughan wrote:
> > I wouldn't say that C has first-class functions. You can't
> > in any sense make them at runtime, most notably.
>
> Sure you can. I thought everyone knew how to do that. Just because people
> don't do it much these days doesn't mean its not possible.
>
> Never could figure out why it was okay in Lisp and other fancy-pants
> languages to do self-modifying code but not in C or assembler....

It is possible to write self-modifying code in assembler.  It is *not*
possible to write self-modifying code in C without relying on undefined
behavior.  There is no guarantee that pointers to functions can be converted
to or from pointers to data (including pointers to void).


--
Rainer Deyke (root at rainerdeyke.com)
Shareware computer games           -           http://rainerdeyke.com
"In ihren Reihen zu stehen heisst unter Feinden zu kaempfen" - Abigor

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