I am using  remove_if for multimap. But  compiler
(Microsoft VC++ 5) gives me following error message:

   std::pair<class foo * const,class foo1 *>' :
                   'operator =' function is unavailable

I think there is no operator= defined for pair or there is a problem in
my code?
If remove_if does not work for multimap how can I sequnetially check
objects in
map and delete them conditionally?

Thanks

Pong
pchu@scdt.intel.com

///////////////////////////////////////////////////////////////
#include <map>
#include <algorithm>

using namespace std ;
class foo;
class foo1;

typedef multimap < foo*, foo1*, less <foo*> > myMap;
typedef pair <foo* const , foo1*>    myPair;
class foo{
public:
  foo():x(1){};
  ~foo(){};
  const foo& operator=(const foo&) { return *this;}
  int x;
};

class foo1{
public:
  foo1():x(1){}
  const foo1& operator=(const foo1&) { return *this;}

  ~foo1(){}

  int x;
};
struct checker {
  checker(){}
  const  bool operator() ( myPair pr) {  return true; }
};

main()
{
  myMap mp;
  foo1 *f1= new foo1();
  foo  *f= new foo();
  mp.insert( myPair (f, f1)); // insert ok

  remove_if(mp.begin(), mp.end(),  checker());// compile error

  // test pair
  myPair p(f,f1), p1(f,f1);
 // p1=p;  //  can also cause compile error

  return 1;

}
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