Re: [boost] [optional] Safe optional

Subject: Re: [boost] [optional] Safe optional
From: Gottlob Frege (gottlobfrege_at_[hidden])
Date: 2014-11-24 13:17:56

On Thu, Nov 20, 2014 at 5:00 AM, Andrzej Krzemienski <akrzemi1_at_[hidden]> wrote:

> the docs also recommends NOT to use optional<T> to signal a potential
> error/difficulty in computing T:
> http://www.boost.org/doc/libs/1_57_0/libs/optional/doc/html/boost_optional/tutorial/when_to_use_optional.html
> .
>
> This is the choice made for optional<T>. The authors of expected<T, E> may
> want to choose a different model.
>

expected<T,E> is almost surely written for exactly that purpose.

Tony