[Qt-interest] Treating User defined type as QVariant via void*

[Santhosh Y]

On 9/22/2010 4:16 PM, Stephen Kelly wrote:
> You never use the macro Q_DECLARE_METATYPE
>
> Have a read through the docs for QVariant and QMetaType.
>
>
>
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>    
1>------ Rebuild All started: Project: variant_test, Configuration: 
Debug Win32 ------
1>Deleting intermediate and output files for project 'variant_test', 
configuration 'Debug|Win32'
1>Compiling...
1>variant.cpp
1>.\variant.cpp(37) : warning C4100: 'n' : unreferenced formal parameter
1>c:\qt\4.5.2\include\qtcore\../../src/corelib/kernel/qmetatype.h(189) : 
error C2039: 'qt_metatype_id' : is not a member of 'QMetaTypeId<T>'
1>        with
1>        [
1>            T=Node *
1>        ]
1>        
c:\qt\4.5.2\include\qtcore\../../src/corelib/kernel/qmetatype.h(189) : 
while compiling class template member function 'int 
QMetaTypeId2<T>::qt_metatype_id(void)'
1>        with
1>        [
1>            T=Node *
1>        ]
1>        
c:\qt\4.5.2\include\qtcore\../../src/corelib/kernel/qmetatype.h(199) : 
see reference to class template instantiation 'QMetaTypeId2<T>' being 
compiled
1>        with
1>        [
1>            T=Node *
1>        ]
1>        
c:\qt\4.5.2\include\qtcore\../../src/corelib/kernel/qvariant.h(585) : 
see reference to function template instantiation 'int qMetaTypeId<T>(T 
*)' being compiled
1>        with
1>        [
1>            T=Node *
1>        ]
1>        
c:\qt\4.5.2\include\qtcore\../../src/corelib/kernel/qvariant.h(327) : 
see reference to function template instantiation 'bool 
qVariantCanConvert<T>(const QVariant &)' being compiled
1>        with
1>        [
1>            T=Node *
1>        ]
1>        .\variant.cpp(71) : see reference to function template 
instantiation 'bool QVariant::canConvert<Node*>(void) const' being compiled
1>Build log was saved at 
"file://c:\cygwin\home\AFTERCHANGE\aera2GUI\variant_test\debug\BuildLog.htm"
1>variant_test - 1 error(s), 1 warning(s)
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========



Please see my attached file with the suggested changes included.

-- 
----------------------------------------------------
Y Santhosh Kumar -
Senior Software Engineer,
SoftJin Technologies Pvt Ltd,
www.softjin.com
----------------------------------------------------



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