[Qt-interest] Strange (as for me) QByteArray behavior

[Konrad Rosenbaum]

On Wednesday 08 December 2010, Ivan Kharin wrote:
> > QByteArray tmp = username.toAscii();
> 
> const QByteArray &tmp = username.toAscii(); // avoid copy: const ref to
> function result == //   keep automatic variable intact until end of
> scope

I don't think this can work reliably. C++ is not a garbage collected 
language, the reference becomes invalid immediately after the semicolon.

Besides: it is unnecessary. QByteArray is implicitly shared - so very little 
data is actually copied.


	Konrad
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