Re: [boost] [move][unique_ptr] c++14 unique_ptr comes to town

Subject: Re: [boost] [move][unique_ptr] c++14 unique_ptr comes to town
From: Peter Dimov (lists_at_[hidden])
Date: 2014-08-28 16:26:38

Ion Gaztañaga wrote:
> > 85    template <class U>
> > 86    unique_ptr_data(P p, BOOST_FWD_REF(U) d) BOOST_NOEXCEPT
> > 87       : m_p(::boost::forward<U>(p)), d(::boost::forward<U>(d))
> > 88    {}
> >
> > It's not clear to me why you need this constructor (in addition to the
> > two others), and it's wrong - forward<U>(p) isn't likely to work.
>
> Apart from the useless "forward<>()" (which I think will work as pointers 
> are not move-enabled),

Unless forward<U> ignores U, I don't see how it would work. The type of the 
pointer is P, not U, which is not likely to be the same.