[Development] qsizetype and classes working with QStrings or QList

Matthew Woehlke mwoehlke.floss at gmail.com
Fri Aug 28 19:45:16 CEST 2020

On 25/08/2020 15.15, André Pönitz wrote:
> On Mon, Aug 24, 2020 at 09:46:43AM +0200, Mathias Hasselmann wrote:
>>     C++ also has a solution for that problem: [1]
>>     https://herbsutter.com/2013/08/12/gotw-94-solution-aaa-style-almost-always-auto/
> AAA is a non-solution from the ivory tower.
> It's a pain for human reviewers and tools operating on less then a full
> translation unit.
> (Almost) real-world example:
>      for (auto i = foo.guess_stuff(); --i >= 0; )
>        do_something(i);
> Good? Bad?

Bad, *but*...

   for (auto const i : indexRange(foo.guess_stuff()) | range::reverse)

...better! ;-) Also answers Scott's question.

(I'll assume `do_something` is actually something complicated enough 
that std::for_each or the like wouldn't be preferred. Also note that 
exact spelling of the above will depend on where you are getting range 
utilities; in my case, I'm lucky if I can use C++14, so I have my own 

BTW, AAA encourages duck typing, which may be a good or bad thing 
depending on your perspective.


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