Re: [Boost-users] intrusive_ptr and incomplete types

gast128: ...

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From the header file of intrusive_ptr it seems that it can deal with incomplete types. The constructor and destructor use the 'intrusive_ptr_add_ref' or 'intrusive_ptr_release'. If these are not invoked, use of an intrusive_ptr with incomplete types should be ok.

So it seems that below example will compile:

//foo.h: #include <boost/intrusive_ptr.hpp>

class A;

This doesn't answer your question, but if you add void intrusive_ptr_add_ref( A* ); void intrusive_ptr_release( A* ); you can copy intrusive_ptr<A> instances around freely. This achieves a level of incomplete type support that matches shared_ptr<A>.