Re: class Q_CORE_EXPORT QFlag

["Steve Graegert" <graegerts@gmail.com>]

On 5/1/07, Shriramana Sharma <samjnaa@gmail.com> wrote:
> I see many usages in the Qt sources like:
>
> class Q_CORE_EXPORT QFlag
> {
>         <blah blah blah>
> } ;
>
> Isn't the word immediately next to the keyword class supposed to be the
> class name? Q_CORE_EXPORT etc are certainly not class names. What are
> they and how are they allowed in between the word class and the class name?
>
> I searched my "Thinking in C++" for this but did not turn up an answer.
> Please help.

It's a macro that expands with different results depending on the
platform and/or context.  For example when building Qt applications on
a Windows machine, it's redefined to Q_DECL_EXPORT which, in this
case, expands to __declspec(dllexport).  See
/src/corelib/global/qglobal.h in the Qt source tree.

	\Steve

--

Steve Grägert <steve@graegert.com>
Jabber    xmpp://graegerts@jabber.org
-
To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html