[#BloombergLP-bslstl-Optional_NulloptConstructToken]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::Optional_NulloptConstructToken
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:mrdocs:

This trivial tag type is used to create `nullopt_t` objects prior to C++17.

== Synopsis

Declared in `<bslstl_optional.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct Optional_NulloptConstructToken;
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