[#BloombergLP-bslstp-HashSelector-04]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstp.adoc[bslstp]::HashSelector
:relfileprefix: ../../
:mrdocs:

This meta‐function selects the appropriate implementation for comparing the parameterized `TYPE`. This generic template uses the `std::equal_to` functor.

== Synopsis

Declared in `<bslstp_hash.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class HASH_KEY>
struct HashSelector;
----

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslstp/HashSelector-04/Type.adoc[`Type`] 
| Hash functor type selected for `HASH_KEY`.
|===


== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslstp/HashSelector-00.adoc[`HashSelector<char>`] 
| This meta‐function is specialized for `char`, and uses the `Hash<char>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-0cf.adoc[`HashSelector<int>`] 
| This meta‐function is specialized for `int`, and uses the `Hash<int>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-03.adoc[`HashSelector<long>`] 
| This meta‐function is specialized for `long`, and uses the `Hash<long>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-02c.adoc[`HashSelector<long long>`] 
| This meta‐function is specialized for `long long`, and uses the `Hash<long long>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-0ea.adoc[`HashSelector<short>`] 
| This meta‐function is specialized for `short`, and uses the `Hash<short>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-07.adoc[`HashSelector<signed char>`] 
| This meta‐function is specialized for `signed char`, and uses the `Hash<signed char>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-05.adoc[`HashSelector<unsigned char>`] 
| This meta‐function is specialized for `unsigned char`, and uses the `Hash<unsigned char>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-0d.adoc[`HashSelector<unsigned int>`] 
| This meta‐function is specialized for `unsigned int`, and uses the `Hash<unsigned int>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-0e9.adoc[`HashSelector<unsigned long>`] 
| This meta‐function is specialized for `unsigned long`, and uses the `Hash<unsigned long>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-027.adoc[`HashSelector<unsigned long long>`] 
| This meta‐function is specialized for `unsigned long long`, and uses the `Hash<unsigned long long>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-01.adoc[`HashSelector<unsigned short>`] 
| This meta‐function is specialized for `unsigned short`, and uses the `Hash<unsigned short>` functor to hash values of that type.
| xref:BloombergLP/bslstp/HashSelector-0a.adoc[`HashSelector<char const*>`] 
| This meta‐function is specialized for `const char *`, and uses the `HashCString` functor to hash the string values.
| xref:BloombergLP/bslstp/HashSelector-0c2.adoc[`HashSelector<HASH_KEY const>`] 
| Partial specialization that hashes `const` types as their non‐`const` type.
|===



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