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Subject: Re: [boost] [Serialization] can BOOST_ASSERT have method calls?
From: Robert Ramey (ramey_at_[hidden])
Date: 2011-01-18 11:29:56

Patrick Horgan wrote:
> I noticed in serializations basic_iarchive that when you're not
> building for debug the next line here (317 in basic_iarchive.cpp) has a
> warning
> for unused variable new_cid. The BOOST_ASSERT is instantiated as
> ((void)0) so new_cid really isn't used. Could the register_type call
> be moved into the assert?
> class_id_type new_cid =
> register_type(bpis_ptr->get_basic_serializer());
> int i = cid;
> cobject_id_vector[i].bpis_ptr = bpis_ptr;
> BOOST_ASSERT(new_cid == cid);
> Something like:
> BOOST_ASSERT(register_type(bpis_ptr->get_basic_serializer())
> == cid);
> Then the new_cid variable wouldn't be needed and the call to
> register_type would disappear with the BOOST_ASSERT if you aren't
> building for debug.

which would break the program.

> Or, does the call to register_type have an
> important side effect that is required?

It does. It must be called. What is optional is checking the return type.

I do this during debug to verify code. I suppose the motiviation here
is to eliminate a spurious warning. This could be done but doing
a little #ifdef hack. If you want to do this, make a patch, test it
and submit it through the track system.

Robert Ramey

> Patrick
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