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. _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
