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Qt-interest Archive, December 2007
No const char * to QString conversion ?

Message 1 in thread

I'm not getting any automatic char * to QString conversion,
but AFAICS that only happens when Qt has been compiled with
QT_NO_CAST_FROM_ASCII.

I didn't specifically switch this on, so I'm guessing that
it's done automatically (with Qt 4.3.2 at least) - why is
that ? The docs imply that it is *not* defined by default.

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Message 2 in thread

Stephen Collyer wrote:
>I'm not getting any automatic char * to QString conversion,
>but AFAICS that only happens when Qt has been compiled with
>QT_NO_CAST_FROM_ASCII.
>
>I didn't specifically switch this on, so I'm guessing that
>it's done automatically (with Qt 4.3.2 at least) - why is
>that ? The docs imply that it is *not* defined by default.

It's not, except inside the Qt build itself.

What's the error you're getting?

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Message 3 in thread

Thiago Macieira wrote:
> Stephen Collyer wrote:
>> I'm not getting any automatic char * to QString conversion,
>> but AFAICS that only happens when Qt has been compiled with
>> QT_NO_CAST_FROM_ASCII.
>>
>> I didn't specifically switch this on, so I'm guessing that
>> it's done automatically (with Qt 4.3.2 at least) - why is
>> that ? The docs imply that it is *not* defined by default.
> 
> It's not, except inside the Qt build itself.
> 
> What's the error you're getting?

Whatever was causing the problem, it's disappeared now
and I can't reproduce it. I had a method taking a QString
where g++ wouldn't accept a char* - I had to construct a
temp QString to get it to compile, but I've gone back to
look at the problem again, and it seems to have magically
disappeared. I have no idea what was going on but I'll
assume it was something I did unless it reoccurs.

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Message 4 in thread

Stephen Collyer wrote:
> I'm not getting any automatic char * to QString conversion,
> but AFAICS that only happens when Qt has been compiled with
> QT_NO_CAST_FROM_ASCII.
>
> I didn't specifically switch this on, so I'm guessing that
> it's done automatically (with Qt 4.3.2 at least) - why is
> that ? The docs imply that it is *not* defined by default.
>
>   
I have noticed that, too, since I switched to Qt4. You can, however, use 
QString::toAscii()::constData() if you want to get a pointer to a C-String.

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