> Sent: Tuesday, May 07, 2019 at 9:31 AM > From: "Giuseppe D'Angelo via Interest" <interest@qt-project.org> > To: interest@qt-project.org > Subject: Re: [Interest] Operator QMap<uint, uint>[] is casting to int? > > On 07/05/2019 14:42, Jason H wrote: > >> Those will likely change to qsizetype in Qt 6. Which is still signed. > > > > This is disappointing. I'll only get half of the indexable space... can I > > get something in return? Having a negative index mechanism, like in Python, > > would be a way to alleviate some of the pain. Otherwise can you explain the > > rationale for not using signed? > > I guess you meant "not using unsigned" here? > > > Half of the memory space is the theoretical maximum you get anyhow, no > matter the signedness of the index, right? > > (You need to be able to take the pointer difference between any two > positions in an array (including the one-past-the-end). Given that > ptrdiff_t is the same size of a pointer, and has to be signed, that > means that the biggest contiguous block of memory you can index is half > of the address space. What am I not seeing?)
Ah, that's probably what I'm missing. Given how often I miss indexing negatives (to index from the end) It seems that we could do this in Qt6? /me ducks _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
