Peter Dimov wrote:
John Torjo wrote:
Hi Peter,
Just a thought: perhaps this constructor: explicit shared_ptr(weak_ptr<Y> const & r);
should be private, and the only way to create a shared_ptr from a weak_ptr is:
shared_ptr<T> val = weak->lock();
This way, the shared_ptr public constructors will never throw. Users will not make mistakes like this:
shared_ptr<T> val = weak;
This shouldn't compile on a reasonably compliant compiler, because the constructor is explicit.
True, sorry, I meant this: shared_ptr<T> val(weak); The point still remains. Best, John -- John Torjo, Contributing editor, C/C++ Users Journal -- "Win32 GUI Generics" -- generics & GUI do mix, after all -- http://www.torjo.com/win32gui/ -- v1.5 - tooltips at your fingertips (work for menus too!) + bitmap buttons (work for MessageBox too!) + tab dialogs, hyper links, lite html