[Development] Basing Qt Creator Coding Style on C++ Core Guidelines?

[Alexander Nassian]

Will there be now 10 BC discussions every year? At least it feels like. Why can't it be decided and then accepted by everyone as is? In my personal opinion I don't care much about BC but I'm happy that it blocks STL usage because its brutally unnatural and I stumbled so often over different behaviors of it on different platforms and compilers that I have a real hate on the STL.

Beste Grüße / Best regards,
Alexander Nassian

> Am 19.11.2016 um 10:22 schrieb Иван Комиссаров <abbapoh at gmail.com>:
> 
> Maybe we should start another thread about BC?
> I'm not convinced that MacOS is the only system when mixing libc++/stdlib makes sence. On linux you can do the same. If we will use stl, the Qt version installed from packages can't be used for development, you should use libc++/stdlib Qt version from Qt site. Not a problem, really.
> The problem is the incompatibility between compiler versions. I had a plugin build with gcc 4.7 and i spent 2 hours to find the reason why it crashed with library build with gcc 4.8 (i didn't know that compiler updated on build host). The problem was that std::unordered_map was BiC.
> So, Qt have to support each gcc (actually, stdlib/libc++ version) major version.
> And you will have reinstall Qt (almost) each time you update the compiler package.
> Correct me if i'm wrong.
> 
> 2016-11-19 10:04 GMT+03:00 Marc Mutz <marc.mutz at kdab.com>:
>> On Friday 18 November 2016 22:12:44 Thiago Macieira wrote:
>> > Em sexta-feira, 18 de novembro de 2016, às 20:37:26 PST, Marc Mutz escreveu:
>> > > There's no reason for Qt to extend its BC guarantees to other libraries.
>> > > STL, GSL, Boost, std::exception, you name it. They are outside of Qt's
>> > > realm and therefore do not fall under the Qt BC rules.
>> >
>> > Which is the reason we can't accept them in our ABI. The rules are
>> > incompatible.
>> 
>> If you extend this argument to its logical conclusion, Qt should be BC between
>> debug and releases on MSVC. Many libraries manage. Gpgme, e.g. Why doesn't Qt?
>> 
>> You see, that argument is completely empty. The STL is forbidden because
>> people are uncomfortable with it, not because it causes BiC. The debug/release
>> stuff on MSVC is allowed to be BiC because people have come to accept it as
>> reality. Neither one is any more right or wrong inherently, than the other.
>> 
>> Thanks,
>> Marc
>> 
>> --
>> Marc Mutz <marc.mutz at kdab.com> | Senior Software Engineer
>> KDAB (Deutschland) GmbH & Co.KG, a KDAB Group Company
>> Tel: +49-30-521325470
>> KDAB - The Qt, C++ and OpenGL Experts
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