I just got back from vacation and saw you had many questions.
Many are answered by Fons, but I'd appreciate if you give me
update which ones you still need help.
Here are some infomation regarding your questions.
* friend
Fons explained already. You need to add #pragma link statement for
each of the friend function in order to use it from the interpreter.
* #define and -p option
If you do not use -p option, constant value declared by #define
statement is registered into the dictionary. However, if you use
-p option, C/C++ preprocessor strips #define information before
CINT reads it. So, the #define information are lost. One easy
workaround is to use a constant variable declaration instead.
const double M_PI = 3.141592;
* template support
Fundamental functionality of template is supported in cint
including template as template argument and default template
argument. There are still some issues regarding STL mostly
due to very complicated typedef scoping, explicit destructor
and overloaded new/delete operators.
Makecint supports embedding instantiated template classes into
the dictionary. However, rootcint may need to be improved.
ClassDef() macro is handled in special way and I need make it
work with the template implimentation.
Masaharu Goto