member function as predicate

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I've been trying to use find_if() to search a map for an element whose value
is equal to a particular number. I'm trying to use a member function as the
predicate, but I can't get the code to compile. I've attached code that
illustrates the problem. The error I get from g++ is that the mem_fun object
isn't a valid operator for use by bind1st. Can some one point out how to fix this?

I know that I can do this using a global predicate function, a static member
function and even a functor. I can also use a for loop instead of find_if()
and just test for equality within the body of the for loop. I've gotten all of
those methods to work. So I've got plenty of "other solutions" to this
problem, I'm only interested in what I need to do to get this solution to work
or in finding out why it won't work. Thanks.

Tony Richardson

====================================================
#include <iostream>
#include <map>
#include <algorithm>

using namespace std;

class test {
public:
     void run();
     void find11();
     bool g4(map<int, int>::value_type &v);
private:
     map<int, int> m;
};

int main()
{
     test *t = new test;
     t->run();
     return 0;
}

void test::run() { m[1] = 5; m[3] = 7; m[5] = 11; m[7] = 13; find11(); }

// non-static member
bool test::g4(map<int, int>::value_type &v) { return v.second == 11; }

void test::find11()
{
     map<int, int>::iterator i;
     // the following line will not compile
     i = find_if(m.begin(), m.end(), bind1st(mem_fun(&test::g4), this));
     if(i != m.end())
        cout << "(key, value) = (" << i->first << ", " << i->second <<
")" << endl;
}

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