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

Invoke the specified `manipulator` on the non‐null value held by the specified `ref`. Return the value from the invocation of `manipulator`.

== Synopsis

Declared in `<bdlar_nullablevalueref.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_MANIPULATOR>
int
bdlat_nullableValueManipulateValue(
    xref:BloombergLP/bdlar/NullableValueRef.adoc[NullableValueRef]* ref,
    t_MANIPULATOR& manipulator);
----

== Return Value

value from the invocation of `manipulator`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ref*
| nullable‐value reference to manipulate
| *manipulator*
| callable invoked on the non‐null value
|===


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