`<hash_map>`

Note

This header is obsolete. The alternative is <unordered_map>.

Defines the container class templates hash_map and hash_multimap and their supporting templates.

Syntax

#include <hash_map>

Hash_map version	Hash_multimap version	Description
operator!= (hash_map)	operator!=(hash_multimap)	Tests if the hash_map or hash_multimap object on the left side of the operator is not equal to the hash_map or hash_multimap object on the right side.
operator== (hash_map)	operator== (hash_multimap)	Tests if the hash_map or hash_multimap object on the left side of the operator is equal to the hash_map or hash_multimap object on the right side.

Hash_map version	Hash_multimap version	Description
swap (hash_map)	swap (hash_multimap)	Exchanges the elements of two hash_maps or hash_multimaps.

Class	Description
hash_compare Class	Describes an object that can be used by any of the hash associative containers — hash_map, hash_multimap, hash_set, or hash_multiset — as a default `Traits` parameter object to order and hash the elements they contain.
value_compare Class	Provides a function object that can compare the elements of a hash_map by comparing the values of their keys to determine their relative order in the hash_map.
hash_map Class	Used for the storage and fast retrieval of data from a collection in which each element is a pair that has a sort key whose value is unique and an associated data value.
hash_multimap Class	Used for the storage and fast retrieval of data from a collection in which each element is a pair that has a sort key whose value need not be unique and an associated data value.

Header: <hash_map>

Namespace: stdext