Re: [boost] [type_traits] Some traits are missing

Subject: Re: [boost] [type_traits] Some traits are missing
From: DUPUIS Etienne (e.dupuis_at_[hidden])
Date: 2013-02-27 06:07:10

>
> > Equivalents of following traits are in C++11 Standard, but missing in
> > Boost.TypeTraits library:
> >
> > has_nothrow_move_assign
> > has_nothrow_move_constructor
> > has_trivial_move_assign
> > has_trivial_move_constructor
> >
> >
> > Or am I missing something and there is a reason, why those traits are
> > not included in Boost.TypeTraits?
>
> New traits are normally only added when someone offers to do the work...
> so if you're offering ;-)
>

In the same vein, I noticed two days ago that type trait boost::conditional is present when including "boost/type_traits/conditional.hpp" (but not defined by boost/type_traits.hpp) and thus
std::tr1::conditional is not defined when including "boost/tr1/type_traits.hpp"

After some searching, it turns out that 'conditional' was not part of TR1 (that explains the above) but that it was added with N2240 to the C++ 2011 standard: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2240.html

Hence my question, should 'conditional' (and probably 'enable_if') be added to "boost/tr1/type_traits.hpp" ?

Regards,
Étienne

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