Hi John, I think that if you first obtain back from the file the pointer value of the class A object and use that in class B then everything should be fine. Cheers, Nick. -- Dr. Nick van Eijndhoven mailto:nick@phys.uu.nl http://www.phys.uu.nl/~nick __________________________________________________________________________ Org.: Utrecht University, Faculty of Physics and Astronomy Address: Princetonplein 5, NL-3584 CC Utrecht, The Netherlands Phone: +31-30-2532331(direct) +31-30-2531492(secr.) Fax: +31-30-2518689 CERN: +41-22-7679751(direct) +41-22-7675857(secr.) Fax: +41-22-7679480 Offices: Buys Ballot laboratory Room 710 (Utrecht) B23 1-020 (CERN) __________________________________________________________________________ John Pretz wrote: > Hello everybody. > > I'm trying out TRef and I ran into the following problem: > I have a class ClassA and a class ClassB. ClassB has a TRef to ClassA. I > want to write them both to disk. I do it two possible ways. One works. > The other doesn't. > If I > 1.) Create ClassA > 2.) Create ClassB > 3.) Make ClassB::fTRef point to ClassA > 4.) Write ClassA and ClassB to file > alls well, and I can read them both back in just fine. > > If however, I do this: > 1.) Create ClassA > 2.) Write ClassA to file > 3.) Create ClassB and make it's TRef point to ClassA > 4.) Write ClassB to file > I read in ClassA and ClassB only to find that ClassB's TRef points to 0. > > Is there a way to make this work for me? I would really like to be able > to write ClassA to file before even creating the object that will point to > it. I hunted around on this list's archives and couldn't find any > solutions. > > I included some code. Just 'make' should compile all the code and run my > problem scripts. (I'm using ROOT 3.10.02 on a RedHat 9 machine) > > Thanks in advance. > > John >
This archive was generated by hypermail 2b29 : Sun Jan 02 2005 - 05:50:05 MET