[#BloombergLP-bdlar-NullableValueVtable]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlar.adoc[bdlar]::NullableValueVtable
:relfileprefix: ../../
:mrdocs:

This struct stores a series of function pointers to wrappers that invoke the underlying methods of the supplied type erased object that implement the "nullable value" type category.

== Synopsis

Declared in `<bdlar_nullablevaluevtable.h>`

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

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlar/NullableValueVtable/MakeValue.adoc[`MakeValue`] 
| Function pointer type assigning the default value for the contained type to a nullable value.
| xref:BloombergLP/bdlar/NullableValueVtable/ManipulateValue.adoc[`ManipulateValue`] 
| Function pointer type manipulating the non‐null value of a nullable value.
| xref:BloombergLP/bdlar/NullableValueVtable/Reset.adoc[`Reset`] 
| Function pointer type resetting a nullable value to its default value.
|===


== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdlar/NullableValueVtable/d_const.adoc[`d_const`] 
| read‐only vtable
| xref:BloombergLP/bdlar/NullableValueVtable/d_makeValue_fp.adoc[`d_makeValue_fp`] 
| make non‐null value
| xref:BloombergLP/bdlar/NullableValueVtable/d_manipulateValue_fp.adoc[`d_manipulateValue_fp`] 
| non‐null value manipulator
| xref:BloombergLP/bdlar/NullableValueVtable/d_reset_fp.adoc[`d_reset_fp`] 
| reset function
|===



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