Can't compile derived class from MakeSelector()

ROOT
1

Hi everybody!

I’m trying to compile a class, which is derived from a class which is generated via the MakeSelector() method, but somehow I don’t succeed.

So, in principal, I’m doing

If I run it with

everything’s fine.
But I want to use a class, which is derived from this class, so I have a class “myClass.C” which looks like that

#include "generatedClass.h" class myClass : public generatedClass { public : myClass () : generatedClass() { }; }
If I try to run that, I get an error which says:

Someone knows, what I’m doing wrong?
I don’t really understand that, because generatedClass is derived from TSelector and myClass is derived from generatedClass, so myClass should also be derived from TSelector, or not?

Cheers,
Christian

2

Hi.

ACLiC only generate the dictionary for the class with the same name as the file and hence ROOT knows about ‘myClass’ but does not known about ‘generatedClass’. Use:

#include "generatedClass.C" class myClass : public generatedClass { public : myClass () : generatedClass() { }; } #ifdef __MAKECINT__ #pragma link C++ class generatedClass+; #endif

Cheers,
philippe.

3

Hi Philippe and thanks for your answer!
Make sense, what you’re saying, but this #pragma line doesn’t seem to help - I still get the same error message.
But I found out, that it works, if I load and compile the base class before. So these lines now work for me:

.L generatedClass.C+ Tree->Process("myClass.C+")