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Cc: Steve Naroff <snaroff@apple.com>, gcc mailing list <gcc@gcc.gnu.org>,
        Matt Austern <austern@apple.com>, Daniel Berlin <dberlin@dberlin.org>,
        Ziemowit Laski <zlaski@apple.com>,
        Nathan Sidwell <nathan@codesourcery.com>,
        Joe Buck <Joe.Buck@synopsys.com>, Mike Stump <mrs@apple.com>
From: Andrew Pinski <pinskia@physics.uc.edu>
Subject: Re: generalized lvalues -- patch outline
Date: Tue, 23 Nov 2004 15:15:00 -0000
To: Michael Matz <matz@suse.de>
X-SW-Source: 2004-11/txt/msg00811.txt.bz2


On Nov 23, 2004, at 9:56 AM, Michael Matz wrote:

> Hi,Practically speaking 4.0 is currently strictly less usefull in some
> aspects for the average C programmer.

The average C programmer would not have thought to use this extension
unless they just decided one day to try it or they actually read the
gcc documentation (which I know almost nobody does).  (We keep getting
bug reports about invalid C++ which explicitly added to the changes
page and in the bug section of the documentation but those people
seems not bothered to read those places.)

if you had the following:

((int*)a)++;

the better idea would be:

char *a1 = (char*)a;
a1 += sizeof(int)/sizeof(char);
a = (typeof(a))(a1);

-- Pinski