[Development] Switching Qt default builds to C++20 where supported

[Giuseppe D'Angelo]

On 14/10/2024 20:46, Mathias Hasselmann via Development wrote:
> The QtCS24 misses the single one big reason you want to switch C++20 now 
> and whenever possible: Concepts.
> They indeed are a total game changer and I'd boldy predict that 80% of 
> all meta-programming helpers in Qt's headers could be replaced by 
> concepts that are easier to understand, more expressive, more complete. 
> You simply do not like C++ if you are not eager to use concepts.
> 
> End of the advertisement block.

This has been discussed at QtCS. The problem is that this would "just" 
imply an easier development of Qt itself, but not necessarily a better 
development *with* Qt, as we don't really expose concepts as public 
APIs. Does that convenience of development for ourselves outweigh the 
market for platforms that are limited to C++17?

Thanks,
-- 
Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
KDAB (France) S.A.S., a KDAB Group company
Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
KDAB - Trusted Software Excellence

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