Re: [boost] Re: Re: class proposal

From: Noel Yap (Noel.Yap_at_[hidden])
Date: 2003-04-24 10:33:53

Terje Slettebø wrote:
> The part about RVO was really concerned with the out() scenario, not
> in_out(). I'm not sure if passing a smart pointer buys you very much. In
> this case, the smart pointer is const but the pointee is not, so the "const"
> in the signature is really just masking what is going on.

You're right.  I see your point.

At first I thought that if there were an easy way to convert smart_ptr<
T > to smart_ptr< T const > there'd be no problem.  But then I realized
this would bring about the expensive copy again.

IMHO, the solution to this dilemna is to use the de facto standard way
of using references like you said earlier:

  void f( T& value_may_change_, T const& value_may_not_change_ );

Noel
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