[Development] QProperty and library coding guide

[Lars Knoll]

> On 22 Jul 2020, at 17:30, Thiago Macieira <thiago.macieira at intel.com> wrote:
> 
> On Wednesday, 22 July 2020 03:24:30 PDT Lars Knoll wrote:
>> no_unique_address is coming and making that problem go away. It’s available
>> on all compilers except MSVC today (see
>> https://en.cppreference.com/w/cpp/compiler_support#cpp2a).
>> 
>> We want things to work on C++17 and that’s what we have. But we can and
>> should plan for C++20.
> 
> Please reconfirm you are willing to:
> 
> a) require GCC 9.0 and Clang 9.0
> b) not use [[no_unique_address]] in MSVC and clang-cl until Qt 7
> c) drop support for any other compilers until they support 
>   [[no_unique_address]]
> 
> (I think we only have two other supported compilers: Green Hills' and Intel's)

I still don’t understand why you think this should be necessary. All we need to do is clearly document that enabling/disabling the support for this feature is not binary compatible and make sure users don’t mix by accident. 

Cheers,
Lars

> -- 
> Thiago Macieira - thiago.macieira (AT) intel.com
>  Software Architect - Intel DPG Cloud Engineering
> 
> 
> 
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