Re: [boost] [optional] std::tr2::optional

Subject: Re: [boost] [optional] std::tr2::optional
From: Nevin Liber (nevin_at_[hidden])
Date: 2011-11-19 11:44:03

On 19 November 2011 02:22, Sebastian Redl <sebastian.redl_at_[hidden]> wrote:
> Do we even want the third variant? That is, do we want to support tr2::optional of something that is neither copyable nor movable?

I think we do.  optional<T> should be copyable if and only if T is
copyable, and optional<T> should be moveable if and only if T is
moveable.  (I'm not yet sure if construction vs. assignment can also
be distinguished based on how we can implement it.)
-- 
 Nevin ":-)" Liber  <mailto:nevin_at_[hidden]>  [phone]