[#bsl-unordered_map-02b-bucket-05]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_map-02b.adoc[unordered_map]::bucket
:relfileprefix: ../../
:mrdocs:

Return the bucket index for the specified transparent `key`.

== Synopsis

Declared in `<bslstl_unorderedmap.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
xref:bsl/unordered_map-02b/size_type.adoc[size_type]
bucket(LOOKUP_KEY const& key) const
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
        && BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;
----

== Description

Note: implemented inline due to Sun CC compilation error.


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