Dear Root,
I have a little example code that works great when interpreted, but when
compiled does not function properly. I suspect an incorrect LinkDef.h file.
I tried a whole slew of different #pragma link C++ function combinations
without much results. Could someone please help me find a way to get access
to the ostream &operator<<() functions?
Maurik
--------------------------------------------------------------------------------
Interpreted output: (Note: to make the interpreter work properly I comment
out the ClassDef and ClassImp)
root [0] .L test2.cc
root [1] tempa aaa(1,1.234);
root [2] cout << aaa;
Int: 1 Float: 1.234 C: Initialized with constructor.
Compiled output:
server|root>g++ -c -DEGCS -fno-rtti -O -Wall -fPIC -DLinux -DRedHat5
-I/usr/local/root/include test2.cc
server|root>rootcint -f test2cint.cc -c test2.h test2_LinkDef.h
Note: operator new() masked 1c
Note: operator delete() masked 1c
server|root>g++ -c -DEGCS -fno-rtti -O -Wall -fPIC -DLinux -DRedHat5
-I/usr/local/root/include test2cint.cc
server|root>g++ -shared test2.o test2cint.o -o test2.so
server|root>
server|root>
server|root>root
CINT/ROOT C/C++ Interpreter version 5.13.83, Dec 2 1998
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
root [0] .L test2.so
root [1] tempa aaa(1,1.234);
root [2] cout << aaa;
Error: No symbol cout in current scope FILE:/tmp/09439baa LINE:1
(class tempa)139247968
*** Interpreter error recovered ***
root [3]
---------------Code: test2.h -------------------
#ifndef __CINT__
#include "TObject.h"
#endif
#include <iostream.h>
class tempa : public TObject{
public:
int i;
float x;
char str[256];
public:
tempa(){};
~tempa(){};
tempa(int a,float b){
i=a;
x=b;
strcpy(str,"Initialized with constructor.");
}
void Print(){
cout << (*this) << endl;
}
friend ostream &operator<<(ostream &os,tempa &b);
ClassDef(tempa,1)
};
---------------- Code: test2.cc ------------------------
#include "test2.h"
ClassImp(tempa)
ostream &operator<<(ostream &os,tempa &b)
{
os << "Int: " << b.i;
os << " Float: " << b.x;
os << " C: " << b.str << endl;
return(os);
}
--------------- Code: test2LinkDef.h ---------------------
#ifdef __CINT__
#pragma link off all globals;
#pragma link off all classes;
#pragma link off all functions;
#pragma link C++ class tempa;
#pragma link C++ function operator<<(ostream &, class tempa &);
#endif
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