[#bsl-optional-072-2conversion-0d]
= xref:bsl.adoc[bsl]::xref:bsl/optional-072.adoc[optional]::operator xref:BloombergLP/bslmf/NestedTraitDeclaration.adoc[BloombergLP::bslmf::NestedTraitDeclaration<optional, UsesAllocatorArgT, BloombergLP::bslma::UsesBslmaAllocator<t_TYPE>::value>]
:relfileprefix: ../../
:mrdocs:

Nested trait declaration for `bslmf::UsesAllocatorArgT`.

== Synopsis

Declared in `<bslstl_optional.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
operator xref:BloombergLP/bslmf/NestedTraitDeclaration.adoc[BloombergLP::bslmf::NestedTraitDeclaration<optional, UsesAllocatorArgT, BloombergLP::bslma::UsesBslmaAllocator<t_TYPE>::value>]() const;
----


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