Saving a class in a tree with CINT

ROOT
1

Hi there,

In the piece of code below, data are not correctly registered with CINT (.x ztest.cpp(1) then .x ztest.cpp(0)) whereas they are if one uses ACLiC (.x ztest.cpp+(1) then .x ztest.cpp+(0)).
Is it a limitation or is there something to make this work with CINT?

Cheers,
Z (CentOS_5.6/ROOT_5.28.00c)

[code]
#include <TTree.h>
#include <TFile.h>
#include <TObject.h>

class TTest : public TObject
{
public:
Double_t x ;
public:
TTest () { x=-1. ; } ;
~TTest () { } ;
ClassDef (TTest,1) ;
} ;

void ztest ( Bool_t createData=kFALSE )
{
TTest * mytest = NULL ;
TTree * tree = NULL ;
TFile * froot = NULL ;

if ( createData )
{
mytest = new TTest () ;
tree = new TTree (“tree”,“test”) ;
tree->Branch(“test”,“TTest”,&mytest) ;
mytest->x = 3.14 ;
tree->Fill() ;
froot = new TFile (“mytest.root”,“recreate”) ;
tree->Write() ;
froot->Close() ;
} else {
mytest = new TTest () ;
froot = new TFile (“mytest.root”,“read”) ;
tree = (TTree*)froot->Get(“tree”) ;
tree->SetBranchAddress(“test”,&mytest) ;
tree->GetEntry(0) ;
printf ("\n\n%f\n\n",mytest->x) ;
froot->Close() ;
}

return ;
}[/code]

2

[quote]Is it a limitation or is there something to make this work with CINT?[/quote]It is a limitation, the I/O is not properly enabled for interpreted class (i.e. you must compile it via ACLiC for example).

Cheers,
Philippe.

3

Ok, thanks Philippe.
See you,
Z

4

PS: Will Cling manage this?

5

That is the intent (as even the ‘interpreted’ code will be passing through the compiler).

Cheers,
Philippe.