[#BloombergLP-bslstl-Variant_HasUniqueType-02]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/Variant_HasUniqueType-0d.adoc[Variant_HasUniqueType]<t_TYPE, xref:bsl/variant.adoc[bsl::variant<t_HEAD, t_TAIL...>]>
:relfileprefix: ../../
:mrdocs:

== Synopsis

Declared in `<bslstl_variant.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class t_TYPE,
    class t_HEAD,
    class... t_TAIL>
struct xref:BloombergLP/bslstl/Variant_HasUniqueType-0d.adoc[Variant_HasUniqueType]<t_TYPE, xref:bsl/variant.adoc[bsl::variant<t_HEAD, t_TAIL...>]>
    : xref:bsl/integral_constant-02.adoc[bsl::integral_constant<bool, Variant_CountType<t_TYPE, t_HEAD, t_TAIL...>::value == 1>]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:bsl/integral_constant-02.adoc[bsl::integral_constant<bool, Variant_CountType<t_TYPE, t_HEAD, t_TAIL...>::value == 1>]`
| Metafunction representing a compile‐time constant of the specified (template parameter) `t_TYPE` with the specified (template parameter) `t_VALUE`.
|===

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:bsl/integral_constant-02/type.adoc[`type`] 
| Alias for this `integral_constant` specialization.
| xref:bsl/integral_constant-02/value_type.adoc[`value_type`] 
| 
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:bsl/integral_constant-02/operator_call.adoc[`operator()`] 
| Return a copy of the template argument `t_VALUE`.
| xref:bsl/integral_constant-02/2conversion.adoc[`operator value_type`] 
| 
|===


== Static Data Members

[cols="1"]
|===
| Name
| xref:bsl/integral_constant-02/value.adoc[`value`] 
|===



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