[Interest] Operator QMap<uint, uint>[] is casting to int?
Ola Røer Thorsen
ola at silentwings.no
Tue May 7 16:08:46 CEST 2019
> Could you make an example where the casts are needed? Maybe the code can
> be rearranged in a way that the casts are NOT needed in the first place.
>
>
QByteArray bytes; // chosen because some api needs it later
std::vector<char> other_bytes; // maybe returned from some 3rd party library
...
if (static_cast<std::size_t>(bytes.size()) >= other_bytes.size()) {
...
}
I guess i could write stuff like
const std::size_t byteSize = bytes.size();
if (byteSize >= other_bytes.size())
but then I rather prefer static_cast. Note that I'm not saying we should
change everything in Qt to unsigned int, I think that might break a lot of
existing application code out there. Just saying that sometimes a
static_cast is needed.
Cheers,
Ola
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