Re: [boost] explicit shared_ptr(weak_ptr<Y> const & r);

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.