[#bsl-unordered_set-09-erase-018]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_set-09.adoc[unordered_set<Attribute, AttributeHash>]::erase
:relfileprefix: ../../
:mrdocs:

Remove from this set the `value_type` object that is equivalent to the specified `key`, if such an entry exists, and return 1; otherwise, if there is no `value_type` object that is equivalent to `key`, return 0 with no other effect. This method invalidates only iterators and references to the removed element and previously saved values of the `end()` iterator, and preserves the relative order of the elements not removed.

== Synopsis

Declared in `<bslstl_unorderedset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/unordered_set-09/size_type.adoc[size_type]
erase(xref:bsl/unordered_set-09/key_type.adoc[key_type] const& key);
----


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