Compilation Error - Operation != is illegal with Forte 6 U1

Question

when I compiled the following source code, I get the error below. I believe i am missing something basic. I ompile on Solaris 8/Forte 6Update1.
Compilation Error message:
"tmp.C", line 73: Error: The operation "PhoneBook != PhoneBook" is illegal.
1 Error(s) detected.
//Source Code
#include <map>
#include <string>
#include <iostream>
#include <utility>
struct PhoneBook
//constructors
PhoneBook(long number, std::string address) ;
PhoneBook(const PhoneBook& rPB) ;
//assignment operator
PhoneBook& operator=(const PhoneBook& rPB) ;
//destructor
~PhoneBook() ;
//comparison operators
bool operator<(const PhoneBook& rPB) ;
bool operator==(const PhoneBook& rPB) const;
//friend function
friend std::ostream& operator<<(std::ostream& os, const PhoneBook& rPB) ;
//data
long m_Number ;
std::string m_Address ;
PhoneBook::PhoneBook(long number, std::string address)
m_Number = number ;
m_Address = address ;
PhoneBook::PhoneBook(const PhoneBook& rPB)
m_Number = rPB.m_Number ;
m_Address = rPB.m_Address ;
PhoneBook::~PhoneBook()
bool PhoneBook::operator==(const PhoneBook& rPB) const
return (m_Number == rPB.m_Number) ;
PhoneBook& PhoneBook::operator=(const PhoneBook& rPB)
m_Number = rPB.m_Number ;
m_Address = rPB.m_Address ;
return *this ;
bool PhoneBook::operator<(const PhoneBook& rPB)
return (m_Number < rPB.m_Number) ;
using namespace std;
using namespace std::rel_ops;
int main()
     PhoneBook p1(1234, "foobar");
     PhoneBook p2(2341, "oobarf");
if (p2 != p1)
          cout<<"Not equal" <<endl;
} else {
          cout<<"Not equal" <<endl;
     return 0;
//Source Code
thanks
easwar

Answer 1

This has been fixed in Sun One Studio 8, Compiler Collection.
- Rose