[#BloombergLP-bslstl-Function_InvokerUtilNullCheck-07-isNull]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/Function_InvokerUtilNullCheck-07.adoc[Function_InvokerUtilNullCheck<MEMTYPECLASS::*>]::isNull
:relfileprefix: ../../../
:mrdocs:

Return `true` if the specified `f` pointer to member is null; otherwise `false`.

== Synopsis

Declared in `<bslstl_function_invokerutil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
bool
isNull(MEMTYPECLASS::* f);
----

== Return Value

`true` if `f` is null, and `false` otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *f*
| pointer‐to‐member to test for a null value
|===


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