[#BloombergLP-bslstl-Variant_Base-2constructor-02]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/Variant_Base.adoc[Variant_Base]::Variant_Base
:relfileprefix: ../../../
:mrdocs:

Create a `Variant_Base` object holding the alternative with index (template parameter) `t_INDEX`, direct‐initialized from the specified `args`. If this `Variant_Base` is allocator‐aware, the currently installed default allocator is used to supply memory.

== Synopsis

Declared in `<bslstl_variant.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    size_t t_INDEX,
    class... t_ARGS>
explicit
Variant_Base(
    bsl::in_place_index_t<t_INDEX>,
    t_ARGS&&... args);
----


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