ROOT Version: 6.23.01 (compared with 6.18/00 and 6.22/02)
Platform: CentOS Linux release 7.9.2009 (lxplus)
Compiler: Not Provided
Dear ROOT experts,
I have noticed a weird behaviour of ROOT 6.23/01 in TTree I/O. Let us assume I have a branch called “t.”, referring to a TClonesArray of a class “Event”. Previous versions of ROOT always store the TTree with branches having the following name structure:
t. (for the class)
t…e (for a member of the class)
When I stored a TTree with this newer ROOT version, instead the branch naming convention changes, removing the dot:
t (for the class)
t.e (for a member of the class)
You can find an example code here (modified from the ROOT tutorial tree0.C, but using a TClonesArray) and the output I obtain in different ROOT versions.
My question is if this change is intentionally done, since the branches ending with the dot give issues with PyROOT. In this case, could you please add a warning when you tell the user of this branch name change?