On Tuesday 06 February 2007 21:57 pm, Frank Mori Hess wrote:
Now I realize I don't need any changes to shared_ptr at all, I can do it all in a wrapper function inserted between the raw pointer and shared_ptr. I can't think of a name, so call it ptr_wrapper():
shared_ptr<MyClass>(signalslib::ptr_wrapper(new MyClass));
ptr_wrapper would call postconstruct() if its input pointer is derived from postconstructible, and return a shared_ptr. The deleter for the returned shared pointer would be (by default) customized to call the predestructor if the input pointer is derived from predestructible. A custom deleter could be accepted as a second argument to ptr_wrapper.
If anyone is interested, I've put an implementation of this idea into the boost-sandbox cvs, in the files postconstructible.hpp, predestructible.hpp, and deconstruct_ptr.hpp. I called the wrapper function deconstruct_ptr(). -- Frank