From: Valentin Bonnard (Bonnard.V_at_[hidden])
Date: 1999-11-10 13:02:52
ivan66_at_[hidden] wrote:
> I assume that it would be legal to compare a shared_ptr<Derived> with a
> shared_ptr<Base>? Also, that a shared_array<Base> could be compared to
> a shared_array<Base>,
It depends on the declaration of op== (member or non member).
1) member: conversions allowed on rhs but not lhs
=> base == derived passes
but derived == base fails
=> very strange dissymmetric effect
2) non member: no conversions at all
=> symmetry in that base == derived and derived == base
both fail the same way
> but attempting comparison with a
> shared_array<Derived> would trigger a compile-time error?
Definitely (there are no conversions between shared_array<>s).
-- Valentin Bonnard