Hi, boost users and experts.
I often use boost::enable_shared_from_this.
I know - it contains boost::weak_ptr, which is initiated in the details of
boost::shared_ptr's constructor.
Also sometimes I need function weak_from_this() at the classes derived from
boost::enable_shared_from_this. For now I use something like:
class my_class
: public boost::enable_shared_from_this
, private boost::noncopyable
{
...somewhere in my_class details...
private:
typedef my_class this_type;
typedef boost::weak_ptr this_type_weak_ptr;
this_type_weak_ptr weak_from_this()
{
return this_type_weak_ptr(shared_from_this());
}
}; // my_class
But as I know restoring shared_ptr from weak_ptr (done in
shared_from_this()) is quite expensive. So my_class::weak_from_this() does
unnecessary work instead of just copy internal weak_ptr stored in
enable_shared_from_this.
So the question is: why there is no weak_from_this() member function in
boost::enable_shared_from_this class?
Regards,
Marat Abrarov.
