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

Insert into this set a newly created `value_type` object, constructed by forwarding `get_allocator()` (if required) and the specified (variable number of) `args` to the corresponding constructor of `value_type`, if a key equivalent to such a value does not already exist in this set; otherwise, this method has no effect (other than possibly creating a temporary `value_type` object). Return a pair whose `first` member is an iterator referring to the (possibly newly created and inserted) object in this set whose value is equivalent to that of an object constructed from `arguments`, and whose `second` member is `true` if a new value was inserted, and `false` if an equivalent key was already present.

== Synopsis

Declared in `<bdlc_flathashset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class... ARGS>
xref:bsl/pair-0b.adoc[bsl::pair<FlatHashSet<KEY, HASH, EQUAL>::iterator, bool>]
emplace(ARGS&&... args);
----


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