[#BloombergLP-bslstl-Optional_Base-05-2constructor-08d]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/Optional_Base-05.adoc[Optional_Base]::Optional_Base
:relfileprefix: ../../../
:mrdocs:

Create a disengaged `Optional_Base` object if the specified `original` object is disengaged, and an `Optional_Base` object with the value of `original.value()` otherwise. This is a special case constructor where `t_ANY_TYPE` is a non‐const version of `t_TYPE` and we use the allocator from `original` to supply memory. `original` is left in a valid but unspecified state.

== Synopsis

Declared in `<bslstl_optional.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_ANY_TYPE>
Optional_Base(
    xref:BloombergLP/bslstl/Optional_MoveConstructFromOtherOptional.adoc[BloombergLP::bslstl::Optional_MoveConstructFromOtherOptional],
    xref:BloombergLP/bslmf/MovableRef_Deduced.adoc[BloombergLP::bslmf::MovableRef_Deduced<Optional_Base<t_ANY_TYPE>>] original);
----


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