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From: fred@genesis.demon.co.uk (Lawrence Kirby)
Subject: Re: Programming language vote - results
Date: 1997/11/23
Message-ID: <880301061snz@genesis.demon.co.uk>#1/1
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References: <6501ih$r1a@dfw-ixnews10.ix.netcom.com>
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Date: 1997-11-23T00:00:00+00:00
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In article <6501ih$r1a@dfw-ixnews10.ix.netcom.com>
           firewind@metroid.dyn.ml.org "firewind" writes:

>Mike Smith <kld_msmith@earthlink.nospam.net> wrote:
>> firewind <firewind@metroid.dyn.ml.org> wrote in article
>> <64qsf0$ccc@dfw-ixnews11.ix.netcom.com>...
>> > I find myself using a construct like this a lot recently (snipped directly
>> > from code I'm working on right now):
>> > 
>> > if(!to && !(to = malloc(sizeof *to)))) return(NULL);
>> > 
>> > For 'verbose' code this would be written:
>> > 
>> > if(!to) {
>> >     if(!to = malloc(sizeof *to)) {
>> >             return(NULL);
>> >     }
>> > }
>> > 
>
>> Yeah, and what's wrong with that?  
>
>Nothing, obviously.

The second form is invalid, it is interpreted the same as:

         if((!to) = malloc(sizeof *to)) {

What is required at the very least is:

         if(!(to = malloc(sizeof *to))) {

-- 
-----------------------------------------
Lawrence Kirby | fred@genesis.demon.co.uk
Wilts, England | 70734.126@compuserve.com
-----------------------------------------