Why does QT use so few exceptions?
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Denis: For consistency we should not mix error handling styles in modules, so I can not see this happen without causing a mayor version number change (since the non-exception style would need to get removed which will break source compatibility).
But this is just my opinion: I am not aware of any plans for Qt 5 or later.
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[quote author="Tobias Hunger" date="1286374926"]
But this is just my opinion: I am not aware of any plans for Qt 5 or later.[/quote]NOOOOOOO!!! =P
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danilocesar: What was that NOOOOO about?
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It's a good place to change major architecture decisions without harm current devs.
From a simplistic point of view (without thinking about continuous improvement of current apps, kde, nokia, market, etc), who doesn't want Qt 5? :) -
[quote author="Tobias Hunger" date="1286394948"]danilocesar: What was that NOOOOO about?[/quote]
Just read this sentence and forget about the context of this thread:
"I am not aware of any plans for Qt 5 or later."
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MTK358: I do not know of any plans, that does not mean that nobody else is doing planning;-)
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To come back to the original question: Is there a technical reason, not to use exception to handle errors? I understood, that the reason was historically, so it's basically a good idea to use exceptions in my own programs.
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I don't think there would be a lot of places where Qt would really benefit from exceptions, but hey, I might be missing something :).
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s.frings: Yes, there is no reason not to use exceptions in your own programs. I do not know whether it is a good idea for consistency reasons: I prefer not having to switch between exception/non-exception code, but that is just a matter of taste.
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What about QSqlError ?
I find it annoying calling lastError() every time I execute a SQL query. I can't think of a better place to use exceptions instead of error codes. Not to mention that exceptions are thread-safe. -
What are the advantages of Exceptions?
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Some of them are explained "here":http://www.parashift.com/c++-faq-lite/exceptions.html
And keep in mind:
there is NO one size fits all! Exceptions might work wel for one case, but not for the other. -
I hope Qt starts to use exceptions soon!
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You'll have to wait at least until Qt 5 comes around.
All releases of the Qt 4 series will stay source and binary compatible. Switching to using exceptions is a far too big change. Maybe it will come sometimes, but don't expect anything. There aren't even rumors about a timeline of Qt 5, even less abut exceptions...