[#BloombergLP-bdlc-FlatHashSet-erase-04]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashSet.adoc[FlatHashSet]::erase
:relfileprefix: ../../../
:mrdocs:

Remove the element equivalent to the specified `key`, if present.

== Synopsis

Declared in `<bdlc_flathashset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
std::size_t
erase(LOOKUP_KEY&& key)
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
         && BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;
----

== Description

Remove from this set the element whose key is equivalent to the specified `key`, if it exists, and return 1; otherwise (there is no element equivalent to `key` in this set), return 0 with no other effect. This method invalidates all iterators and references to the removed element.

== Return Value

1 if an element was erased, and 0 otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| key equivalent to the element to remove
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#