[Qt-interest] Qt code compiles fine on mscv9.0 but failed with gcc

[Bruno Colombet]

Le 25/01/2011 14:35, Thiago Macieira a écrit :
> Em terça-feira, 25 de janeiro de 2011, às 14:24:59, Bruno Colombet escreveu:
>> Hello everybody,
>>
>> I'm developping a Qt application for several months now and my main IDE
>> is Visual Studio 2008 on Windows.
>> By the way, I must assure my application compiles on Linux and Mac OS X.
>>
>> I get used to modify part of my code to make sure gcc will compile it
>> but I wonder if there is a clean way to solve my problem.
>> Here is an example :
>>
>> Class myclass
>> {
>>       public:
>>           void setName(QString&  name);
>> }
>>
>>
>> myclass mc;
>>
>> mc.setName(QString("test");<=== compiles fine with MSCV
> MSVC is wrong. The code is not valid.
>
> QString("test") produces a temporary QString object, which must be an rvalue.
> So you can't assign it to a QString&, which is a non-const reference (takes
> an lvalue).
>
>> got errors with gcc : no matching function for call
>> 'myclass::setName(QString)' candidates are : void myclass::setName(QString&)
>>
>> And a more complex problem in an other part of the code I have a methode
>> like this :
>>
>> - void addCustomChannel(Channel *channel, QString&  after = QString("LAST"));
> Also wrong.
>
> Please add the "const" and everything will compile.
>
>
>
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Thanks for help. I thought MSVC compiler was implicitly doing the 
correct job. I'll be on my guard now, thanks again.

-- 
Bruno Colombet
*INSERM UMR 751* - Epilepsie et Cognition
Faculté de Médecine
27 Bd Jean Moulin
13385 Marseille cedex 05
+33 4 91 38 55 40
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