Create an unordered multiset and insert each value_type object in the specified values initializer list. Optionally specify an initialNumBuckets indicating the initial size of the array of buckets of this container. If initialNumBuckets is not supplied, a single bucket is used. Optionally specify a hashFunction used to generate the hash values for the keys contained in this unordered multiset. If hashFunction is not supplied, a default-constructed object of the (template parameter) type HASH is used. Optionally specify a key-equality functor keyEqual used to verify that two keys are equivalent. If keyEqual is not supplied, a default-constructed object of the (template parameter) type EQUAL is used. Optionally specify a basicAllocator used to supply memory. If basicAllocator is not supplied, a default-constructed object of the (template parameter) type ALLOCATOR is used. If the type ALLOCATOR is bsl::allocator and basicAllocator is not supplied, the currently installed default allocator is used to supply memory. This method requires that the (template parameter) type KEY be copy-insertable into this unordered multiset (see {Requirements on KEY}). Note that a bslma::Allocator * can be supplied for basicAllocator if the type ALLOCATOR is bsl::allocator (the default).
Declared in <bslstl_unorderedmultiset.h>
template<class = void>
requires bsl::IsStdAllocator<ALLOCATOR>::value
unordered_multiset(
std::initializer_list<KEY> values,
ALLOCATOR const& basicAllocator);