From: _z33 <timid.Gentoo@gmail.com>
To: linux-c-programming@vger.kernel.org
Subject: Re: typecasting - explain
Date: Fri, 09 Sep 2005 15:34:59 +0530 [thread overview]
Message-ID: <dfrmoh$qqb$1@sea.gmane.org> (raw)
In-Reply-To: <dfrkke$k2t$1@sea.gmane.org>
Jarmo wrote:
>
> Functions are only "jump" labels. Thou you cant expect a program to work
> if you cross typecast functions with different argument (or return)
> values. This because the function expects arguments to be in "right"
> register or stack position. And caller expects return values to be in
> right register.
>
> // Jarmo
excerpt from a discussion here @
...
ANSI Classic section 3.3.4, page 47 lines 4 to 5: "A pointer to a
function of one type may be converted to a pointer to a function of another
type and back again; the result shall compare equal to the original
pointer."
...
Seems to confuse me a lot. I didn't understand the ABC's of the
quoted discussion; nevertheless, this line there in the discussion,
still stings me :(
What does it mean?
First of all, why should be function pointers be typecasted to
something else?
_z33
--
I love TUX; well... that's an understatement :)
next prev parent reply other threads:[~2005-09-09 10:04 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-09 19:46 typecasting - explain _z33
2005-09-09 7:33 ` kaushal
2005-09-09 8:48 ` _z33
2005-09-09 9:28 ` Jarmo
2005-09-09 10:04 ` _z33 [this message]
2005-09-09 13:19 ` Glynn Clements
2005-09-09 9:46 ` Steve Graegert
2005-09-09 10:22 ` _z33
2005-09-09 10:49 ` Steve Graegert
2005-09-09 11:10 ` _z33
2005-09-09 11:29 ` Steve Graegert
2005-09-09 13:17 ` Glynn Clements
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