Re: [boost] [metal] Feature Complete - Request for Feedback

Subject: Re: [boost] [metal] Feature Complete - Request for Feedback
From: Peter Dimov (lists_at_[hidden])
Date: 2017-02-21 23:38:05

Bruno Dutra wrote:
>>>  mp_transform<std::add_const_t, std::shared_ptr<X>> // std::shared_ptr<X 
>>> const>

> Your example is implemented in Metal like this
>
> using _ = metal::transform<metal::lambda<std::add_const_t>,
> metal::as_list<std::shared_ptr<X>>>; // metal::list<X const>
> metal::apply<metal::lambda<std::shared_ptr>, _> // std::shared_ptr<X 
> const>

And suppose that std::shared_ptr<X> is given to you as a type P, and you 
don't know if it's shared_ptr or not, so you can't use 
metal::lambda<std::shared_ptr>?