[Boost-users] Working around the restriction in enable_shared_from_this

Subject: [Boost-users] Working around the restriction in enable_shared_from_this
From: kelvSYC (kelvsyc_at_[hidden])
Date: 2011-08-09 10:56:35

Suppose I have a class called Group, extending boost::enable_shared_from_this<Group>.  Now suppose I have something like this:

class Foo {
    boost::shared_ptr<const Group> G;
public:
    Foo(const Group& G_) : G(G_.shared_from_this()) {}
};

This would totally barf if, among other things, G_ was allocated from the stack, say, since I don't have an owning shared_ptr instance.  So, it would appear that, at the very least, if you were to allocate a Group on the stack, then you would need a shared_ptr with a null deleter to make use of Foo.  This seems inconvenient to whoever may want to use Foo, so is there a way to change this so get around the shared_ptr instance restriction without changing Foo?