[#BloombergLP-bslstl-HashTable_Util-assertNotNullPointer-08]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/HashTable_Util.adoc[HashTable_Util]::assertNotNullPointer
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:mrdocs:

Assert that a non‐pointer argument is accepted (no‐op).

== Synopsis

Declared in `<bslstl_hashtable.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class TYPE>
static
void
assertNotNullPointer(TYPE& ptr);
----

== Description

This overload is selected when `TYPE` is not a pointer. Note that this utility is necessary as the `HashTable` class template may be instantiated with function pointers for the hasher or comparator policies, but there is no easy way to assert in general that the value of a generic type passed to a function is not a null pointer value.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ptr*
| non‐pointer value (never treated as null)
|===


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