Re: [boost] [next gen future-promise] What to call the monadic returntype?

Subject: Re: [boost] [next gen future-promise] What to call the monadic returntype?
From: Peter Dimov (lists_at_[hidden])
Date: 2015-05-25 08:51:59

Niall Douglas wrote:

> https://svn.boost.org/trac/boost/wiki/BestPracticeHandbook#a8.DESIGN:Stronglyconsiderusingconstexprsemanticwrappertransporttypestoreturnstatesfromfunctions

This section is called

"(Strongly) consider using constexpr semantic wrapper transport types to 
return states from functions"

but I see nothing constexpr in it - the result of calling ::open can never 
be constexpr.

Could you perhaps elaborate a bit on the "constexpr semantic" part?