[Boost-users] Seg fault with boost::any / derived system

From: Stephen Gross (sgross_at_[hidden])
Date: 2005-12-15 10:34:34

In the following snippet, I've got a simple inherited system (base and 
derived). I create a boost::any and assign it a derived instance. Then I try 
to any_cast it to the base. It compiles, but at runtime it segfaults. Is 
this expected behavior? Is there a way to make this work?

Thanks!
--Steve

===== CODE FOLLOWS =====

class base { public: virtual void go() const { ; } };
class foo1 : public base { virtual void go() const { std::cout << "foo1" << 
std::endl; } };

void test1()
{
  foo1 f;
  boost::any a = f;
  boost::any_cast<base> (&a)->go();
}

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