[#bsl-hashAppend-08]
= xref:bsl.adoc[bsl]::hashAppend
:relfileprefix: ../
:mrdocs:

Pass the specified `object` to the specified `hashAlg`.

== Synopsis

Declared in `<bslstl_typeindex.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class HASHALG>
void
hashAppend(
    HASHALG& hashAlg,
    xref:bsl/type_index.adoc[type_index] const& object);
----

== Description

This function integrates with the `bslh` modular hashing system and effectively provides a `bsl::hash` specialization for `type_index`.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *hashAlg*
| hashing algorithm to update
| *object*
| type_index value to incorporate into the hash
|===


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