[Boost-users] ptr_map<U, T> with polymorphic U

Subject: [Boost-users] ptr_map<U, T> with polymorphic U
From: Victor Snyder (victor.d.snyder_at_[hidden])
Date: 2012-11-07 13:02:09

ptr_map<U, T> lets me map simple types to pointers-to-T,
preserving polymorphic behavior of the mapped-to objects, and clearly
stating that the ptr_map solely owns the pointed-to objects.

I'd like to map pointers-to-U to pointers-to-T and have the map solely own
the key objects as well as the mapped-to objects.  ptr_map doesn't do this.
 I could map shared_ptrs-to-U to pointers-to-T, but then I lose the clear
ownership semantics.

Does anyone know of an easy workaround to get the behavior and semantics
that I want, or is this more properly a feature request?

Thanks!