How to accomplish covariant return types when returning a shared_ptr?
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by Kyle
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Published on 2010-04-22T02:02:49Z
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2010/04/22
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using namespace boost;
class A {};
class B : public A {};
class X {
virtual shared_ptr<A> foo();
};
class Y : public X {
virtual shared_ptr<B> foo();
};
The return types aren't covariant (nor are they, therefore, legal), but they would be if I was using raw pointers instead. What's the commonly accepted idiom to work around this, if there is one?
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