Sender:	tim AT mxrelay DOT g-net DOT be
Message-ID:	<3BA5EE91.34C04104@falconsoft.be>
Date:	Mon, 17 Sep 2001 14:37:37 +0200
From:	Tim Van Holder <tim DOT vanholder AT falconsoft DOT be>
Organization:	Anubex (www.anubex.com)
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To:	djgpp AT delorie DOT com
Subject:	Re: Option -Wunused & STL
References:	<Pine DOT A41 DOT 4 DOT 05 DOT 10109171134540 DOT 56990-100000 AT ieva06>
Reply-To:	djgpp AT delorie DOT com

Andris Pavenis wrote:
> 
> On Mon, 17 Sep 2001, Alex Vinokur wrote:
> 
> It is so also with gcc-3.0.X after adding missing 'using namespace std;'
> and I don't expect changes, as it's not always simple to say when object
> is not only unused but really useless

Right - an object is always 'used' in the sense that its constructor is
invoked.  Even if that constructor is the default one, the object could
have subobjects that have non-trivial constructors with important side
effects.  gcc would have to inspect all subobjects to decide whether or
not the variable is really 'unused'.

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