[Interest] Future of constexpr in Qt?

[Schimkowitsch Robert]

>
> That should be done in unit testing, wherever possible. Some
> conditions we simply can't test, such as *succeeding* in allocating a
> memory block of a size comparable to PTRDIFF_MAX because such a block
> is not architecturally possible (on 64-bit machines). As a rule of
> thumb for test writers: always test your boundary conditions.

The problem with testing UB cases is that the program can do anything, which means a runtime unit test could succeed even though e.g. I hit a signed integer overflow.
That's why I would consider compile-time tests for such cases.

Kind regards

Robert
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