04.12.2017, 17:31, "Ville Voutilainen" <ville.voutilai...@gmail.com>: > On 4 December 2017 at 16:20, Allan Sandfeld Jensen <k...@carewolf.com> wrote: >> On Montag, 4. Dezember 2017 15:00:53 CET Marc Mutz wrote: >>> Ah, well, yes. Nothing truly originates in C++, true. But, IIRC, the >>> Haskell name is maybe. So why is it QOptional and not QMaybe? Because >>> the C++ interface is used as the basis, not something from Haskell. >> >> I believe the name "optional" comes from Haskell and Java where it appeared >> first. The standard library only imports things that are already industry >> standard, and once there were several implementations of optional out there, >> they started to pull one in. They just didn't manage to write it without >> using >> C++17'isms. > > std::optional has no fundamental c++17isms in it, and can be written > without any problem in C++11 code. > I maintain optional in libstdc++, in case you wonder on what basis I'm > making that statement. > The standard library imports a whole host of things that aren't always > industry standards, but > it imports things only when there's a proposal to import something.
See also https://github.com/akrzemi1/Optional/blob/master/optional.hpp > _______________________________________________ > Development mailing list > Development@qt-project.org > http://lists.qt-project.org/mailman/listinfo/development -- Regards, Konstantin _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
