protected virtual member function
<locale>

std::collate::do_hash

long do_hash (const charT* low, const charT* high) const;
Get has value [virtual]
Virtual protected member function in charge of returning the hash value for the contents of a string as described in public member function hash (see collate::hash for details).

Polymorphic derived classes can redefine the behavior of this function.

See also

collate::hash
Get hash value (public member function)

C++