[boost] Re: implicit smart pointer conversions

From: Kevlin Henney (kevlin_at_[hidden])
Date: 2000-03-18 03:08:53

In message <B4F8848D.2F5E%abrahams_at_[hidden]>, Dave Abrahams
<abrahams_at_[hidden]> writes
[...]
>Finally, I worry that allowing the implicit conversion will break this
>smart_ptr<Derived> -> smart_ptr<Base> conversion or others like it:
>
>void f(smart_ptr<Derived> d)
>{
>    smart_ptr<Base> b(d); // ambiguous?
>}
>
>at least that would be true for auto_ptr, since conversions proceed through
>auto_ptr_ref.

Except that unfortunately they don't: auto_ptr_ref is private and is not
befriended by all auto_ptr templates, so such conversions are not
possible at the moment anyway. One of the "features" of the standard :-}
____________________________________________________________

  Kevlin Henney                       Curbralan Ltd
  kevlin_at_[hidden]                [phone]
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