Re: [Boost-users] [shared_ptr] Using a custom delete function that is a class member function

Subject: Re: [Boost-users] [shared_ptr] Using a custom delete function that is a class member function
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-10-09 19:40:23

AMDG

Ryan McConnehey wrote:
> I have a class that provides a shared_ptr number.  At the end of the 
> number's life cycle it should be placed back on a list of available 
> numbers.  The shared_ptr's custom deleter function looks like what I 
> need.  I'm able to get a free function to compile as the deleter just 
> fine.  In trying to use a class member function as the custom deleter 
> I've run into compile errors.  I'm not sure where I'm going wrong.  I 
> know the custom deleter need to be copy constructible and I'm probably 
> breaking some assumed requirement.  Any help on what I'm doing wrong 
> would be appreciated.
> Ryan
>
>
> class CTNGenerator {
> public:
> CTNGenerator(void) {
>  m_AvailableCTNs.resize(20);
>  unsigned short startValue = 15;
>
>  for (ctns::iterator itor = m_AvailableCTNs.begin(); itor != 
> m_AvailableCTNs.end(); ++itor) {
>    //This compiles fine.
>    boost::bind(boost::mem_fun(&CTNGenerator::makeCTNAvailable), this);
>    //Placing the call as the custom delete function doesn't compile.
>    *itor = bus(new unsigned short(startValue++), 
> boost::bind(boost::mem_fun(&CTNGenerator::makeCTNAvailable, this)));
>  }
> }

Check you parentheses.  The two uses of bind/mem_fun are not the same.

In Christ,
Steven Watanabe