[#BloombergLP-bslstl-Variant_OverloadSetImp-03]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/Variant_OverloadSetImp-07.adoc[Variant&lowbar;OverloadSetImp]&lt;t&lowbar;SRC, t&lowbar;INDEX, t&lowbar;HEAD&gt;
:relfileprefix: ../../
:mrdocs:

Provide the base case, reached with a single remaining alternative&period;

== Synopsis

Declared in `&lt;bslstl&lowbar;variant&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;
    class t&lowbar;SRC,
    size&lowbar;t t&lowbar;INDEX,
    class t&lowbar;HEAD&gt;
struct xref:BloombergLP/bslstl/Variant_OverloadSetImp-07.adoc[Variant&lowbar;OverloadSetImp]&lt;t&lowbar;SRC, t&lowbar;INDEX, t&lowbar;HEAD&gt;;
----

== Description

This partial specialization of `Variant&lowbar;OverloadSetImp` is the base case of the recursion, reached when a single alternative, `t&lowbar;HEAD`, remains in the overload set&period;

== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslstl/Variant_OverloadSetImp-03/candidate.adoc[`candidate`] 
| Overload candidate selecting alternative `t&lowbar;INDEX` for source type `t&lowbar;SRC`&period;
|===



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