[Boost-users] Question in usage of boost::bind

Subject: [Boost-users] Question in usage of boost::bind
From: Archie14 (admin_at_[hidden])
Date: 2009-02-02 13:29:27

Below is an example that fails to compile. I have a vector of pointers to a 
templated class and I need to use find_if. My understanding of boost::bind. is 
that the first argument, when binding member function, is an explicit "this" 
pointer,
that should be A* in my case. 

Any help in explaining what I am doing wrong will be greatly appreciated.

#include <algorithm>
#include <string>
#include <vector>
#include <boost/bind.hpp>

#include <algorithm>
#include <string>
#include <vector>

#include <boost/bind.hpp>

template<typename T> class A
{
        T _val;
public:
        A(T val) : _val(val){};
        T Val() {return _val;}

        bool CompareByVal(A<T>* a, int iType, T ofval)
        {
                return ( (a != NULL) && (iType == 1) && (a->Val() == ofval) );
        }
};

int _tmain(int argc, _TCHAR* argv[])
{
        std::vector<A<int>*>  a;

        std::find_if (a.begin(), 
                       a.end(), 
                       boost::bind(&A<int>::CompareByVal, _1, _2, 1,1));
}