[#bsl-variant-2constructor-015]
= xref:bsl.adoc[bsl]::xref:bsl/variant.adoc[variant]::variant
:relfileprefix: ../../
:mrdocs:

Create a `variant` object holding the 0th alternative, which is value‐initialized. If this `variant` is allocator‐aware, the specified `allocator` is used to supply memory. This constructor participates in overload resolution only if the 0th alternative is default constructible.

== Synopsis

Declared in `<bslstl_variant.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_FIRST = t_HEAD>
requires std::is_default_constructible<t_FIRST>::value
variant(
    std::allocator_arg_t,
    xref:bsl/variant/allocator_type.adoc[allocator_type] allocator);
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#