[#BloombergLP-bdlb-CaselessStringViewHash-operator_call]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/CaselessStringViewHash.adoc[CaselessStringViewHash]::operator()
:relfileprefix: ../../../
:mrdocs:

Return a case‐insensitive hash of the specified `argument`.

== Synopsis

Declared in `<bdlb_caselessstringviewhash.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::size_t
operator()(std::string_view argument) const;
----

== Description

Return a hash code generated from the contents of the specified null‐terminated `argument` string, cast to lower case. The behavior is undefined unless `argument` points to a null‐terminated string.

== Return Value

case‐insensitive hash of `argument`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *argument*
| string view whose contents are hashed
|===


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