This means that a
multiset
supports the
a_eq
operations in
[associative.reqmts]
but not the
a_uniq
operations
. For a
multiset<Key>
both the
key_type
and
value_type
are
Key. Descriptions are provided here only for operations on
multiset
that are not described in one of these tables
and for operations where there is additional semantic information
.