[Bug c++/40997] Wrong address returned in covariant return

[jwakely dot gcc at gmail dot com]

------- Comment #6 from jwakely dot gcc at gmail dot com  2009-08-07 12:59 -------
(In reply to comment #4)
> Ah, [class.virtual] paragraph 5 says:
> If the return type of D::f differs from the return type of B::f, the class type
> in the return type of D::f shall be complete at the point of declaration of
> D::f or shall be the class type D.

Here's a reduced testcase for the missing diagnostic:

struct OuterBase { };

struct B
{
    virtual OuterBase* f();
};

struct OuterDerived : OuterBase
{
    struct D : B {
        virtual OuterDerived* f();
    };
};

OuterDerived is not complete at the point of declaration of D::f and is not D.

The standard doesn't say this is undefined or "no diagnostic required" so I
think this bug should be 'accepts-invalid' rather than 'wrong-code'


-- 

jwakely dot gcc at gmail dot com changed:

           What    |Removed                     |Added
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                 CC|                            |jwakely dot gcc at gmail dot
                   |                            |com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40997