From: Russ Cox <rsc@swtch.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] naive acid debugging
Date: Wed, 15 Jul 2009 11:30:54 -0700 [thread overview]
Message-ID: <dd6fe68a0907151130g48fcfadaq4c1a83ce8ee5aed6@mail.gmail.com> (raw)
In-Reply-To: <588ebae7237a9a5546342bea3d5c89eb@coraid.com>
>> print("f->mb=", f->mb\X," =? mb=",mb\X,"\n");
>> f=f->next;
Always use . (never ->) in acid.
If f is a pointer, then the acid expression f.mb
is like the C expression (*f).mb aka f->mb.
The acid expression f->mb is like the C expression (**f).mb.
By using -> here you are indirecting one level too far.
-> is one of those acid features that seems
to exist only to cause confusion.
Russ
next prev parent reply other threads:[~2009-07-15 18:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-15 15:26 gdiaz
2009-07-15 16:41 ` erik quanstrom
2009-07-15 18:30 ` Russ Cox [this message]
2009-07-15 17:52 ` gdiaz
2009-07-15 15:37 gdiaz
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