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Re: , operand with no effect warning

To: Phil Edwards <pedwards at disaster dot jaj dot com>
Subject: Re: , operand with no effect warning
From: Daniel Jacobowitz <drow at mvista dot com>
Date: Mon, 30 Jul 2001 16:12:54 -0700
Cc: John Levon <moz at compsoc dot man dot ac dot uk>, gcc at gcc dot gnu dot org
References: <20010730203002.A6393@compsoc.man.ac.uk> <20010730180111.C22291@disaster.jaj.com>

On Mon, Jul 30, 2001 at 06:01:11PM -0400, Phil Edwards wrote:
> On Mon, Jul 30, 2001 at 08:30:03PM +0100, John Levon wrote:
> > 
> > Why does gcc warn for :
> > 
> > 	p1, p2;
> 
> Because this has no effect.
> 
> > but not :
> > 	delete p1, p2;
> 
> Because this does have an effect.

Admittedly, the whole statement has an effect - p1 is deleted.  But the
second operand of the comma is not used, so it would be nice if we
could warn about that somehow.

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer

Follow-Ups:
- Re: , operand with no effect warning
  - From: Joern Rennecke

References:
- , operand with no effect warning
  - From: John Levon
- Re: , operand with no effect warning
  - From: Phil Edwards

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