Return a theoretical upper bound on the size of this multimap.
Declared in <bslstl_multimap.h>
multimap<KEY, VALUE, COMPARATOR, ALLOCATOR>::size_type
max_size() const noexcept;Return a theoretical upper bound on the largest number of elements that this multimap could possibly hold. Note that there is no guarantee that the multimap can successfully grow to the returned size, or even close to that size without running out of resources.
theoretical maximum number of elements