Re: [boost] Changes to Boost.Functional

From: Mark Rodgers (mark.rodgers_at_[hidden])
Date: 2001-12-08 10:01:12

From: "Peter Dimov" <pdimov_at_[hidden]>
> >   identity
> >   project1st
> >   project2nd
> >   select1st
> >   select2nd
>
> call_trait-izing these has the unfortunate side effect of always returning
> by value. I think that the pass by const ref, return by const ref approach
> might be preferable.

I see your point.  OTOH I do want identity<const int&>(), etc to be able
to work, which it wouldn't if we pass by const T&.  Perhaps the answer is
to return call_traits<T>::param_type.  I'll need to think about this some
more.

Mark