[#BloombergLP-bdlcc-StripedUnorderedMap-visitReadOnly-05]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlcc.adoc[bdlcc]::xref:BloombergLP/bdlcc/StripedUnorderedMap.adoc[StripedUnorderedMap]::visitReadOnly
:relfileprefix: ../../../
:mrdocs:

Call read&hyphen;only `visitor` on every element until finished or it returns false&period;

== Synopsis

Declared in `&lt;bdlcc&lowbar;stripedunorderedmap&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
visitReadOnly(xref:BloombergLP/bdlcc/StripedUnorderedMap/ReadOnlyVisitorFunction.adoc[ReadOnlyVisitorFunction] const& visitor) const;
----

== Description

That is, for `(key, value)`, invoke&colon; &grave; bool visitor(value, key)&semi; &grave; Return the number of elements visited or the negation of that value if visitations stopped because `visitor` returned `false`&period; `visitor` has read&hyphen;only access to each element for duration of each invocation&period; Every element present in this hash map at the time `visit` is invoked will be visited unless it is removed before `visitor` is called for that element&period; Each visitation is done by the calling thread and the order of visitation is not specified&period; The behavior is undefined if hash map manipulators are invoked from within `visitor`, as it may lead to a deadlock&period; Note that `visitor` can _not_ change the value of the visited elements&period;

== Return Value

number of elements visited, or its negation if stopped early

== Parameters

[cols="1,4"]
|===
| Name| Description
| *visitor*
| read&hyphen;only functor invoked with each element
|===


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