[Qgis-developer] Requiring c++17 minimum

[Worth Lutz]

I have customers who use Windows and QGIS. They will not be changing their OS as QGIS is not their major task. 
I have others who would be QGIS users if we could convince them to try it.  But they too have other tasks which are limited to Windows. 
Unfortunately not all users have the option to change. 

Sent from my iPhone

> On Mar 6, 2017, at 6:35 PM, Nyall Dawson <nyall.dawson at gmail.com> wrote:
> 
>> On 7 March 2017 at 09:32, Nathan Woodrow <madmanwoo at gmail.com> wrote:
>> As a Mircosoft shill, I'm a super -1 on this.  How will I make my money from
>> Microsoft for making QGIS on Windows better?
>> 
>> :)
> 
> I dunno. But some guy blocked me on twitter a couple of weeks ago
> because QGIS is available on Windows. That hurt my feelings.
> 
> Nyall
> 
> 
> 
>> 
>>> On Tue, Mar 7, 2017 at 9:07 AM, <gordon at shieldaig.com> wrote:
>>> 
>>> Isn't it possible that g++ will also run on Windows with c++17 support or
>>> that MSVC will have the features too, or shortly will?  Why eliminate
>>> anyone?
>>> 
>>> Gordon
>>> 
>>> 
>>>> On 2017-03-06 17:00, Nyall Dawson wrote:
>>>> 
>>>> Hi all,
>>>> 
>>>> I read on phoronix this morning that c++17 is nearly ready. I think
>>>> it's time we made this the minimum build dependency for QGIS (3.0 and
>>>> 2.18.5, and maybe 2.14 (but not sure about 2.14 since it's the LTS -
>>>> can someone file a QEP?)).
>>>> 
>>>> Advantages:
>>>> - has some neat stuff like parallel algorithms
>>>> - can use std::variant instead of qvariant and std::optional instead
>>>> of QgsOptional
>>>> - 17 is bigger than 11
>>>> 
>>>> Disadvantages:
>>>> - I think we lose the Windows builds. That's a shame, but we need to
>>>> move forward.
>>>> - OSX users will need to build their own version of clang/llvm from
>>>> git. That's ok - they are used to things that "just work" so I think
>>>> they'll quickly adapt to this process.
>>>> - Linux users will need to update to the next beta version of their
>>>> distro. This is just a short-term inconvenience and I'm pretty sure
>>>> no-one will lose productivity because of it.
>>>> 
>>>> I'm certain this is the way forward, so I'll push a change later today
>>>> requiring this.
>>>> 
>>>> Nyall
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>> 
>> 
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