RE: [ROOT] template class and VC++ 6

From: Philippe Canal (pcanal@fnal.gov)
Date: Sat Oct 12 2002 - 02:28:41 MEST 

Hi Heather,

There were severals problems with the handling of templates (and with the
handling of namespaces and nested classes).  Those problems have been fixed
in ROOT 3.03/09.  Please upgrade and test again.

Cheers,
Philippe.

-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Heather Kelly
Sent: Thursday, October 10, 2002 9:52 AM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] template class and VC++ 6


Hi,

I am using ROOT 3.02.07 on both Windows and Linux.  I was just trying to
introduce a new template class, and I started to run into problems.
I went back to the user's guide and decided to implement the simple
example, where I just define a header file - in this case rather than
MyClass1.h I call it Relation.h:

#ifndef RELATION_H
#define RELATION_H

template <typename T> class Relation {
private:
	T fA;

public:
	Relation() {};
	~Relation() {};
	ClassDefT(Relation,1)
};
ClassDefT2(Relation,T)
ClassImpT(Relation,T)
#endif



My LinkDef file is:

#ifdef __CINT__

#pragma link off all globals;
#pragma link off all classes;
#pragma link off all functions;

#pragma link C++ class Relation<int>+;
#endif


This compiles just fine on Linux using gcc 2.91.  However, it fails on
Visual C++ 6.0.  I am not sure if this is a deficiency in the VC++ compiler
or an error on my part.  The first error message is:

commonRootData_rootcint.cxx(17) : error C2143: syntax error : missing ';'
before '<'
Which refers to this line in the rootcint file:
template <> TBuffer &operator>><int >(TBuffer &buf, Relation<int> *&obj)

Any suggestions would be welcome.

Thanks,
Heather

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