Defines the container template classes hash_set and hash_multiset and their supporting templates.
For a list of all members of this header, see <hash_set> Members.
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 The stdext Namespace for more information.
Reference
Thread Safety in the Standard C++ Library
Standard Template Library
Other Resources
<hash_set> Members
Standard C++ Library Header Files