[Bug libstdc++/111963] Predicate copied when it could be forwarded in some STL algorithms

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111963

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The internal functions like __partition could just take forwarding references
to the predicates, at least for C++11 and later.