life without std::bind

no_bind.cpp

struct CameraInfo{
  // whatever
};

CameraInfo camera_info[5];

void callbackImplementation(CameraInfo& cam_info, const sensor_msgs::Image::ConstPtr& msg)
{
     // generic implementation
     // lot of stuff that we don't want to copy and paste
}

void callbackCallbackA(const sensor_msgs/Image::ConstPtr& msg {
  callbackImplementation(camera_info[0], msg);
}

void callbackCallbackB(const sensor_msgs/Image::ConstPtr& msg) {
  callbackImplementation(camera_info[1], msg);
}

void callbackCallbackC(const sensor_msgs/Image::ConstPtr& msg) {
  callbackImplementation(camera_info[2], msg);
}
                      
void callbackCallbackD(const sensor_msgs/Image::ConstPtr& msg) {
  callbackImplementation(camera_info[3], msg);
}

void callbackCallbackE(const sensor_msgs/Image::ConstPtr& msg) {
  callbackImplementation(camera_info[4], msg);
}