[Development] Undocumented change in behavior of QLocale toInt() between Qt4 and Qt5

[Thiago Macieira]

On quinta-feira, 23 de maio de 2013 17.13.59, Simon Lees wrote:
> Hi All,
> Seen as i don't have points to make doc notes or edit the wiki and
> within 3 minutes of searching i couldn't find a easy way to reach the
> doc team ill send this here.
> 
> QLocale toInt in Qt 4 took a default paramater for base = 0, this means
> that the default behavior is to handle the conversion as octal if there
> is a leading 0 or has hex etc, etc. In our code we force base 10 because
> the behavior of base 0 is undesirable for us.
> In Qt5 QLocale does not have a paramater for base, it is also not
> documented whether the conversion is handled as base 0 or 10. Having
> spent 5 mins digging through source code i can confirm it is 10. It
> would be nice if someone could update the porting guide and QLocale
> documentation to mention this as it is a change of behavior that has
> probably gone left unnoticed by alot of people although in my case i
> think the Qt5 handling is more sensible.

Hi Simon

Locale-based base encoding does not make sense. There's no language that does 
that, not even the "C" language speaks hexadecimal :-)

But sure, the porting guide should be updated. I was working on this code in 
QLocale a month ago and I had not even realised that it had changed from Qt 4.

Thanks for the heads-up.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center
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