Compile errors using std::bind in gcc 4.7

Question

I am having a lot of trouble using std::bind in various places of my code. Sometimes it works, sometimes it doesn\'t, so I assume I am doing something fundament

Answer 1

The _2 placeholder means to use second argument of the returned functor. Therefore the type of

std::bind(foo,1,_2)

is not std::function but

std::function

To get std::function, use

std::bind(foo, 1, _1)
//                ^^