[Boost-users] [lambda][shared_ptr] Creating a shared_ptr with a custom delete function using a lambda expression

Subject: [Boost-users] [lambda][shared_ptr] Creating a shared_ptr with a custom delete function using a lambda expression
From: Ryan McConnehey (mccorywork_at_[hidden])
Date: 2009-10-07 20:49:17

I have a class that maintains a list of available numbers.  The user 
will ask for a number and receive a shared_ptr with a value.  Once the 
user is done with the number  it will be put back on the list of 
available numbers.  I'm trying to initialize the list with numbers and a 
custom delete function for the shared_ptr to be return to the list.  Any 
help would be appropriated in how to get the lambda and custom delete 
function to work.

Ryan

class CTNGenerator {
public:
  CTNGenerator(void) {
    m_AvailableCTNs.resize(20);
    unsigned short startValue = 15;
    typedef boost::shared_ptr<unsigned short>  bus;

    //The lambda function isn't compiling with how it's currently written.
    std::for_each(m_AvailableCTNs.begin(), m_AvailableCTNs.end(), _1 = 
bus(new bus(var(startValue++)), &makeCTNAvailable));
  }

private:
  void CTNGenerator::makeCTNAvailable(unsigned short * ctn) {
    m_AvailableCTNs.push_back(boost::shared_ptr<unsigned short>(ctn));
  }

private:
  std::list< boost::shared_ptr<unsigned short> >  m_AvailableCTNs;
};