[#BloombergLP-bslstl-Variant_IsTag-01]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::Variant&lowbar;IsTag
:relfileprefix: ../../
:mrdocs:

This component&hyphen;private metafunction is derived from `bsl&colon;&colon;true&lowbar;type` if (template parameter) `t&lowbar;TYPE` is not a tag type&period; This metafunction requires any cv and ref qualifications to be removed from the queried type&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;class t&lowbar;TYPE&gt;
struct Variant&lowbar;IsTag
    : xref:bsl/false_type.adoc[bsl::false&lowbar;type]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:bsl/false_type.adoc[bsl::false&lowbar;type]`
| Metafunction representing the boolean constant `false`&period;
|===

== Specializations

[cols="1"]
|===
| Name
| xref:BloombergLP/bslstl/Variant_IsTag-08.adoc[`Variant&lowbar;IsTag&lt;std::allocator&lowbar;arg&lowbar;t&gt;`] 
| xref:BloombergLP/bslstl/Variant_IsTag-0a.adoc[`Variant&lowbar;IsTag&lt;bsl::in&lowbar;place&lowbar;index&lowbar;t&lt;t&lowbar;INDEX&gt;&gt;`] 
| xref:BloombergLP/bslstl/Variant_IsTag-07.adoc[`Variant&lowbar;IsTag&lt;bsl::in&lowbar;place&lowbar;type&lowbar;t&lt;t&lowbar;TYPE&gt;&gt;`] 
|===



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