<hash_map>
The latest version of this topic can be found at <hash_map>.
NOTE]
This header is obsolete. The alternative is <unordered_map>.
Defines the container template classes hash_map and hash_multimap and their supporting templates.
In Visual C++ .NET 2003, members of the <hash_map> and <hash_set> header files are no longer in the std namespace, but rather have been moved into the stdext namespace. See stdext Namespace for more information.
Syntax
#include <hash_map>
Operators
| 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. |
Specialized Template Functions
| Hash_map version | Hash_multimap version | Description |
|---|---|---|
| swap (hash_map) | swap (hash_multimap) | Exchanges the elements of two hash_maps or hash_multimaps. |
Classes
| 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. |
Requirements
Header: <hash_map>
Namespace: stdext
See Also
Header Files Reference
Thread Safety in the C++ Standard Library
Standard Template Library