[Boost-users] boost::none for boost::shared_ptr

Subject: [Boost-users] boost::none for boost::shared_ptr
From: Chris Stankevitz (chrisstankevitz_at_[hidden])
Date: 2014-01-29 12:27:47

Hello,

Does boost::shared_ptr offer a way to create an empty shared pointer
without a lot of typing?  Perhaps something analogous to boost::none.
I am not using c++11.

Thank you,

Chris

==

using boost::none;
using boost::optional;

// declare
f(optional<CSomeReallyLongClassName> Item);
g(shared_ptr<CSomeReallyLongClassName> pItem);

// invoke f with empty object
f(none);

// invoke g with empty object
g(shared_ptr<CSomeReallyLongClassName>());