[#bsl-unordered_set-0d2d-2constructor-053]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_set-0d2d.adoc[unordered_set]::unordered_set
:relfileprefix: ../../
:mrdocs:

Create an unordered set having the same value as the specified `original` object. Use a copy of `original.hash_function()` to generate hash values for the keys contained in this set. Use a copy of `original.key_eq()` to verify that two keys are equivalent. Use the allocator returned by `bsl::allocator_traits<ALLOCATOR>:: select_on_container_copy_construction(original.get_allocator())` to allocate memory. This method requires that the (template parameter) type `KEY` be `copy‐insertable` into this set (see {Requirements on `KEY`}).

== Synopsis

Declared in `<bslstl_unorderedset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
unordered_set(xref:bsl/unordered_set-0d2d.adoc[unordered_set] const& original);
----


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