Is there anything that can be done to allow auto_ptr covariant return
types, that is:

class foo {
 class bar {};
 auto_ptr<bar> getbar() { return new bar(); }
};

class food /* :-) */ : public foo {
 class bard : public foo::bar {};
 auto_ptr<bard> getbar() { return new bard(); }
};

Thanks in advance
--
Alexandre Oliva
oliva@dcc.unicamp.br
Departamento de Ci^encia de Computa,c~ao
Universidade Estadual de Campinas
Campinas  S~ao Paulo  Brazil

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