[#BloombergLP-bdlat_NullableValueFunctions-manipulateValue]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlat_NullableValueFunctions.adoc[bdlat_NullableValueFunctions]::manipulateValue
:relfileprefix: ../../
:mrdocs:

Invoke the specified `manipulator` on the address of the value stored in the specified "nullable" `object`. The supplied `manipulator` must be a callable type that can be called as if it had the following signature: ` int manipulator(VALUE_TYPE *value); ` Return the value from the invocation of `manipulator`. The behavior is undefined unless `object` does not contain a null value.

== Synopsis

Declared in `<bdlat_nullablevaluefunctions.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class TYPE,
    class MANIPULATOR>
int
manipulateValue(
    TYPE* object,
    MANIPULATOR& manipulator);
----


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