Re: problem with bind2nd

Hi,

I am having the following question (see code below)

the class Data is declared as
class Data
{
public :
    // rest of class

};

class Base : public binary_function<string, Data, bool>
{
public :
    virtual bool operator() (const string& line, Data d) const = 0;

};

class Derived_1 : public Base
{
    bool operator()(const string& line, Data d)

    {
        // do your stuff
        return true or false;
    }

};

class Derived_2 : public Base
{
    bool operator()(const string& line, Data d)

    {
        // do your stuff
        return true or false;
    }

};

in some other class which has a vector dataLines I want to perform a find
on the vector. My problem is that sometimes I need to call the operator()
on the derived_1 class and another time I need to call operator() on the
Derived_2 class. The find function has a pointer to Derived_1 or Derived_2=

class. But what do I put as argument for the bind2nd class

bind2nd( // What do i put here // , data)

I tried bind2nd( c() , data) but is gives me the error below

error C2064: term does not evaluate to a function taking 0 arguments

void MyClass::find(Compare* c, Data data)
{
    vector<string>::iteraor result;

    result = find_if(dataLines.begin(), dataLines.end(), bind2nd( //=

i put here // , data));

    // rest of code

 }