If the specified original contains a value, create an Optional_Base object whose contained value is initialized by moving from *original and converting to t_TYPE. Otherwise, create a disengaged Optional_Base. Use the specified allocator to supply memory. original is left in a valid but unspecified state.
Declared in <bslstl_optional.h>
template<class t_ANY_TYPE>
Optional_Base(
std::allocator_arg_t,
allocator_type allocator,
BloombergLP::bslstl::Optional_MoveConstructFromOtherOptional,
BloombergLP::bslmf::MovableRef_Deduced<Optional_Base<t_ANY_TYPE>> original);