error: invalid use of non-static member function

[hanito]

Hello,
I am trying to call a function call_from_thread_description from another function inside a class and I am getting the following error. I can't find the right to add a function to the pool.

Error: /home/hani/workspace/transform/Transform.cpp:127:104: error: invalid use of non-static member functiondr esults.push_back(thread_pool.push(Transform::call_from_thread_description, data[i], data[j], res));

void Transform::call_from_thread_description(const vector<string> & e1, const <string> & e2, <string>  & res)
{ 
//DO SOMETHING HERE
}

void Transform::computer_intersection()
{
    vector<string> res;
    int Num_Threads =  thread::hardware_concurrency();
    ctpl::thread_pool thread_pool(Num_Threads);
    for(int i = 0; i < data.size();i++)
    {
        data_sets tmp;
        for(int j = 0; j < data.size();j++)
        {
            results.push_back(thread_pool.push(call_from_thread_description, data[i], data[j], res));
            if(j % Num_Threads == 0 || j == data.size() -1)
            {
               results.clear();
            }
       }
  }
}

[VPaulV]

Just use lambda function, like this:

results.push_back(thread_pool.push([&, this](int id){ call_from_thread_description(data[i], data[j], res)});

[MisterTea]

Can this use-case be added to the README and example.cpp? It's really useful to see