[#BloombergLP-bslstl-Variant_OverloadHelper-05-Index]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/Variant_OverloadHelper-05.adoc[Variant&lowbar;OverloadHelper]::Index
:relfileprefix: ../../../
:mrdocs:

Index constant equal to `variant&lowbar;npos` when no unique conversion exists&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef xref:bsl/integral_constant-02.adoc[bsl::integral&lowbar;constant&lt;size&lowbar;t, bsl&colon;&colon;variant&lowbar;npos&gt;] Index;
----


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