...one of the most highly
regarded and expertly designed C++ library projects in the
world. — Herb Sutter and Andrei
polymorphic_cast was suggested by Bjarne Stroustrup in "The
C++ Programming Language".
polymorphic_downcast was contributed by Dave
polymorphic_pointer_downcast was contributed by Boris
polymorphic_pointer_cast by Antony Polukhin.
numeric_cast that was contributed by Kevlin
Henney is now superseeded by the Boost
Numeric Conversion Library