[Development] QtCS 2017 QtCore sessions

[Konstantin Tokarev]

04.12.2017, 17:31, "Ville Voutilainen" <ville.voutilainen at gmail.com>:
> On 4 December 2017 at 16:20, Allan Sandfeld Jensen <kde at 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

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-- 
Regards,
Konstantin