[#BloombergLP-bslstl-Optional_IsBslOptional-07]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::Optional&lowbar;IsBslOptional
:relfileprefix: ../../
:mrdocs:

Metafunction that is `false&lowbar;type` for types that are not `bsl&colon;&colon;optional`&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;class t&lowbar;TYPE&gt;
struct Optional&lowbar;IsBslOptional
    : 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/Optional_IsBslOptional-0d.adoc[`Optional&lowbar;IsBslOptional&lt;bsl::optional&lt;t&lowbar;TYPE&gt;&gt;`] 
|===



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