std::function to member function

问题

#include <functional>

struct A
{
    int func(int x, int y)
    {
        return x+y;
    }
};

int main()
{

    typedef std::function<int(int, int) > Funcp;
    A a;
    //Funcp func = std:::bind(&A::func, &a);
    Funcp func = std::bind(&A::func, a, std::placeholders::_1);


    return 0;
}

I am getting errors in both of the above bind functions:

 error C2825: '_Fty': must be a class or namespace when followed by '::'

Where is the syntax error? I am using visual studio 2010

回答1:

Funcp func = std::bind(&A::func, &a, std::placeholders::_1, std::placeholders::_2);

来源：https://stackoverflow.com/questions/5154116/stdfunction-to-member-function