class SomeOtherClass {};
class A : public TObject
{
public:
        
   A(SomeOtherClass &b, Int_t y, Int_t z) {
     printf("this,b,y,z = %p,%p,%d,%d\n",this,&b,y,z);
   }
   A &func(SomeOtherClass &b, Int_t y, Int_t z) {
     printf("this,b,y,z = %p,%p,%d,%d\n",this,&b,y,z);
     return *this;
   }
   ClassDef(A,1);
};

#include "TClass.h"
#include "TMethodCall.h"
#include "TString.h"
#include "TROOT.h"

int mc() {
   TClass* c = TClass::GetClass("A");

   TMethodCall call;
 
   call.InitWithPrototype(c,"func","SomeOtherClass&,Int_t,Int_t");

   if ( call.IsValid() )
   {
     SomeOtherClass b;
     printf("&b = %p\n",&b);

     TString params; params.Form("*((SomeOtherClass*)0x%p),%d,%d",&b,1,3);

     Long_t rl;

     A *a =reinterpret_cast<A*>( gROOT->ProcessLineFast(Form("new A(*((SomeOtherClass*)0x%p),%d,%d",&b,1,3)));
     call.Execute(a, params,rl);
     a = 0;
     a = reinterpret_cast<A*>(rl); 
     printf("result = %p\n",a);
   } else {
     printf("Function not found\n");
   }
   return 0;

}