Re: [boost] [optional] Suggestion for adding an optional_number class

On 25. Jul 2017, at 15:46, Sergey Mitsyn via Boost wrote:

FYI there was a proposal recently for optional with the same purpose; unfortunately, it went nowhere:

https://lists.boost.org/Archives/boost/2015/09/225692.php

There was also boost::markable with a similar intend: https://lists.boost.org/Archives/boost/2016/09/230811.php