[Qt-interest] Why do I get a deprecated conversion warning about string to char*?

[Thiago Macieira]

Em Terça-feira 10 Agosto 2010, às 14:27:18, Matthias Pospiech escreveu:
> I get this waring everytime I use a char string in the code:
> warning: deprecated conversion from string constant to 'char*'
> 
> The code looks like this:
> 
> sendCommand("BF");
> 
> with this definition
> 
> void PI_TranslationStage::sendCommand(QString Command, int const value)
> 
> {
> 
>     QString buffer;
> 
>     buffer = Command + QString("%1").arg(value);
> 
>     QByteArray ba = buffer.toLatin1();
> 
>     char * cbuffer = ba.data();
> 
>     MMC_sendCommand(cbuffer);
> 
> }
> 
> How can I get rid of these messages? And why do they appear?

The above code doesn't produce this warning.

The code below however does:

	char *foo = "Hello";

Solution: add const:

	const char *foo = "Hello";

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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