[#bsl-hash-017]
= xref:bsl.adoc[bsl]::xref:bsl/hash-06.adoc[hash]<xref:bsl/basic_string-0faf.adoc[basic_string<CHAR_TYPE, CHAR_TRAITS, ALLOCATOR>]>
:relfileprefix: ../
:mrdocs:

Specialize `bsl::hash` for strings, including an overload for pointers to allow character arrays to be hashed without converting them first.

== Synopsis

Declared in `<bslstl_string.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class CHAR_TYPE,
    class CHAR_TRAITS,
    class ALLOCATOR>
struct xref:bsl/hash-06.adoc[hash]<xref:bsl/basic_string-0faf.adoc[basic_string<CHAR_TYPE, CHAR_TRAITS, ALLOCATOR>]>
    : xref:BloombergLP/bslh/Hash-07.adoc[BloombergLP::bslh::Hash<>]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:BloombergLP/bslh/Hash-07.adoc[BloombergLP::bslh::Hash<>]`
| This struct wraps the (template parameter) type `HASH_ALGORITHM` in an interface that satisfies the `hash` requirements of the C++11 standard.
|===

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslh/Hash-02/HashAlgorithm.adoc[`HashAlgorithm`] 
| Make the `HASH_ALGORITHM` template parameter available to clients.
| xref:BloombergLP/bslh/Hash-02/result_type.adoc[`result_type`] 
| The type of the hash value that will be returned by the function‐call operator.
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:bsl/hash-017/operator_call-01.adoc[`operator()`] 
| Function call operators
|===



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