Return the key-comparison functor (or function pointer) used by this multiset; if a comparator was supplied at construction, return its value, otherwise return a default constructed key_compare object. Note that this comparator compares objects of type KEY, which is the type of the value_type objects contained in this multiset.
Declared in <bslstl_multiset.h>
multiset<KEY, COMPARATOR, ALLOCATOR>::key_compare
key_comp() const;