[tree] Honour object auto registration settings in TEntryList.

TEntryList and its derived classes will from here on only register
themselves to gDirectory when the thread-local auto-registration is
enabled.

Author: hageboeck

tree/tree/src/TEntryList.cxx

@@ -160,7 +160,7 @@ End_Macro
 #include "TRegexp.h"
 #include "TSystem.h"
 #include "TObjString.h"
-
+#include "TROOT.h"
 
 ////////////////////////////////////////////////////////////////////////////////
 /// default c-tor
@@ -172,9 +172,10 @@ TEntryList::TEntryList() = default;
 
 TEntryList::TEntryList(const char *name, const char *title) : TNamed(name, title)
 {
-
-   fDirectory  = gDirectory;
-   if (fDirectory) fDirectory->Append(this);
+   if (ROOT::Experimental::ObjectAutoRegistrationEnabled()) {
+      fDirectory  = gDirectory;
+      if (fDirectory) fDirectory->Append(this);
+   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -184,8 +185,10 @@ TEntryList::TEntryList(const char *name, const char *title, const TTree *tree) :
 {
    TEntryList::SetTree(tree);
 
-   fDirectory  = gDirectory;
-   if (fDirectory) fDirectory->Append(this);
+   if (ROOT::Experimental::ObjectAutoRegistrationEnabled()) {
+      fDirectory  = gDirectory;
+      if (fDirectory) fDirectory->Append(this);
+   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -196,8 +199,10 @@ TEntryList::TEntryList(const char *name, const char *title, const char *treename
 {
    SetTree(treename, filename);
 
-   fDirectory  = gDirectory;
-   if (fDirectory) fDirectory->Append(this);
+   if (ROOT::Experimental::ObjectAutoRegistrationEnabled()) {
+      fDirectory  = gDirectory;
+      if (fDirectory) fDirectory->Append(this);
+   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -207,8 +212,10 @@ TEntryList::TEntryList(const TTree *tree)
 {
    SetTree(tree);
 
-   fDirectory  = gDirectory;
-   if (fDirectory) fDirectory->Append(this);
+   if (ROOT::Experimental::ObjectAutoRegistrationEnabled()) {
+      fDirectory  = gDirectory;
+      if (fDirectory) fDirectory->Append(this);
+   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////