STL find ()

[localmotion]

Aloha everyone! I am trying to use the find () in the STL but I seem to be doing something wrong, but I can't figure out what. It looks as though I only need to implement the '==' operator, but it doesn't seem to call my class. Please help!

#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
 
class myClass
{
public:
  myClass(){}
  ~myClass(){}
  friend bool operator==(myClass& a, myClass& b);
};
 
bool operator==(myClass& a, myClass& b) //this doesn't get called
{
  cout << "in operator ==" << endl;
  return true;
}
 
int main()
{
  myClass* a = new myClass();
  myClass* b = new myClass();
 
  vector<myClass*> list;
  list.push_back(a);
  list.push_back(b);
  vector<myClass*>::iterator it = find(list.begin(), list.end(), a); //should call operator==
  if( it == list.end() )
    cout<<"Not found"<<endl;
  else
    cout<<"Found"<<endl;
  return 0;
}

after compiling and running, i get this output

g++ -Wall test_find.cpp -o test_find
./test_find
Found

as you can see, my '==' operator doesn't get called. any ideas why?

[Athar]

Yes, since you store pointers in your vector, operator== will be called on those - not on the instances of your class.

[localmotion]

Athar, thanks! That indeed was my mistake. My solution was to wrap myClass and store that in the vector. That seems to have done the trick! Thanks again.

[moorecm]

You don't want to name variables "list", there is already a std::list.