[#bsl-Variant_VariantAlternativeImpl-069]
= xref:bsl.adoc[bsl]::xref:bsl/Variant_VariantAlternativeImpl-06e.adoc[Variant_VariantAlternativeImpl]<0, t_HEAD, t_TAIL...>
:relfileprefix: ../
:mrdocs:

This partial specialization is the base case of the recursion, reached when `t_INDEX` is `0`; it provides the member typedef `type` equal to `t_HEAD`.

== Synopsis

Declared in `<bslstl_variant.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class t_HEAD,
    class... t_TAIL>
struct xref:bsl/Variant_VariantAlternativeImpl-06e.adoc[Variant_VariantAlternativeImpl]<0, t_HEAD, t_TAIL...>;
----

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:bsl/Variant_VariantAlternativeImpl-069/type.adoc[`type`] 
| Alias for the alternative type at index `0` (namely `t_HEAD`).
|===



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