Hello,
I am having a problem with using constant data members in classes that are
then compiled into ROOT. The problem seems to be that the ShowMembers()
function calls TMemberInspector::Inspect() with a pointer to the constant data
member, while TMemberInspector::Inspect() is expecting a void* pointer, i.e.,
a const void* cannot be converted into a void*. I have worked around this
problem by overloading TMemberInspector::Inspect() with a version that does
take a const void*, viz.,
virtual void Inspect(TClass *cl, const char *parent, const char *name,
const void *addr) = 0;
I also had to modify TObject.cxx and TClass.cxx, that define classes deriving
from TMemberInspector, so as to provide a definition for this pure virtual
function. I have done this by simply calling the non-const version of Inspect
with a const_cast, e.g., in TObject.cxx to the class TDumpMembers I have added
void Inspect(TClass *cl, const char *parent, const char *name,
const void *addr) {
return Inspect( cl, parent, name, const_cast<void*>(addr) ); }
Is there any problem in doing this? If not, could some such modification be
done in future releases, so that I do not have to do this each time? If it
matters, I am using ROOT version 3.01.06 compiled with gcc3.0 on a SuSE Linux
7.1 box, but have also had the same problem with older versions of ROOT.
Regards,
Gora
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