[prev in list] [next in list] [prev in thread] [next in thread] 

List:       kde-devel
Subject:    Re: KSharedPtr bool conversion
From:       David Faure <david.faure () insa-lyon ! fr>
Date:       1999-06-16 6:42:05
[Download RAW message or body]

On Wed, Jun 16, 1999 at 02:47:42AM +0200, Harri Porten wrote:
> Hi !
> 
> I've got a problem compiling code that wants to use KSharedPtr's in
> boolean expressions (eg. KScript).
> 
> Example with a fictious class:
> 
>   KSharedPtr<C> ptr;
> 
>   if(ptr)
>     ;
> 
> The (experimental) compiler says:
> 
> shared.cpp:14: warning: choosing `KSharedPtr<C>::operator C *()' over
> `KSharedPtr<C>::operator const C *() const'
> shared.cpp:14: warning:   for conversion from `KSharedPtr<C>' to `bool'
> shared.cpp:14: warning:   because conversion sequence for the argument
> is better
> shared.cpp:14: warning: choosing `KSharedPtr<C>::operator C *()' over
> `KSharedPtr<C>::operator bool() const'
> shared.cpp:14: warning:   for conversion from `KSharedPtr<C>' to `bool'
> shared.cpp:14: warning:   because conversion sequence for the argument
> is better
> 
> Using !!ptr or ptr.operator bool() works fine.
> 
> Why is it trying to go this way of conversion ?
Wild guess : because the conversion needs to be added to ksharedptr.h ?

-- 
David FAURE
david.faure@insa-lyon.fr, faure@kde.org
http://www.insa-lyon.fr/People/AEDI/dfaure/index.html 
KDE, Making The Future of Computing Available Today

[prev in list] [next in list] [prev in thread] [next in thread]