[#BloombergLP-bdld-hashAppend]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdld.adoc[bdld]::hashAppend
:relfileprefix: ../../
:mrdocs:

Invoke the specified `hashAlgorithm` on the value of the specified `datum` object. Note that the value of a User Defined Type in Datum is a combination of its type integer and the address (pointer value), not the actual value of the object that the pointer points to.

== Synopsis

Declared in `<bdld_datum.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_HASH_ALGORITHM>
void
hashAppend(
    t_HASH_ALGORITHM& hashAlgorithm,
    xref:BloombergLP/bdld/Datum.adoc[Datum] const& datum);
----


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