[Bug libstdc++/88738] treat shared_ptr and unique_ptr more like plain old pointers

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88738

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, I would guess that clang's "dumb" warning is fine for 99% of cases, and
the handful of exceptions could use #pragma to disable the warning.

But until/unless G++ gets such a warning, decorating the library in a few
specific places will be an improvement.