[#BloombergLP-bdlc-FlatHashMap-try_emplace-03]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashMap.adoc[FlatHashMap]::try_emplace
:relfileprefix: ../../../
:mrdocs:

`try_emplace` overloads

== Synopses

Declared in `<bdlc_flathashmap.h>`

Try to emplace an element with the specified `key`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class... ARGS>
xref:bsl/pair-0b.adoc[bsl::pair<FlatHashMap<KEY, VALUE, HASH, EQUAL>::iterator, bool>]
xref:BloombergLP/bdlc/FlatHashMap/try_emplace-06.adoc[try_emplace](
    xref:BloombergLP/bslmf/MovableRef.adoc[BloombergLP::bslmf::MovableRef<KEY>] key,
    ARGS&&... args);
----

[.small]#xref:BloombergLP/bdlc/FlatHashMap/try_emplace-06.adoc[_» more..._]#

Try to emplace an element with the specified `key`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class... ARGS>
xref:bsl/pair-0b.adoc[bsl::pair<FlatHashMap<KEY, VALUE, HASH, EQUAL>::iterator, bool>]
xref:BloombergLP/bdlc/FlatHashMap/try_emplace-04c.adoc[try_emplace](
    KEY const& key,
    ARGS&&... args);
----

[.small]#xref:BloombergLP/bdlc/FlatHashMap/try_emplace-04c.adoc[_» more..._]#

Try to emplace an element with the specified `key`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class LOOKUP_KEY,
    class... ARGS>
xref:bsl/pair-0b.adoc[bsl::pair<iterator, bool>]
xref:BloombergLP/bdlc/FlatHashMap/try_emplace-0b.adoc[try_emplace](
    LOOKUP_KEY&& key,
    ARGS&&... args)
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
         && BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;
----

[.small]#xref:BloombergLP/bdlc/FlatHashMap/try_emplace-0b.adoc[_» more..._]#

Try to emplace an element with `key` using a placement hint.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class... ARGS>
xref:BloombergLP/bdlc/FlatHashMap/iterator.adoc[FlatHashMap<KEY, VALUE, HASH, EQUAL>::iterator]
xref:BloombergLP/bdlc/FlatHashMap/try_emplace-041.adoc[try_emplace](
    xref:BloombergLP/bdlc/FlatHashMap/const_iterator.adoc[const_iterator] hint,
    xref:BloombergLP/bslmf/MovableRef.adoc[BloombergLP::bslmf::MovableRef<KEY>] key,
    ARGS&&... args);
----

[.small]#xref:BloombergLP/bdlc/FlatHashMap/try_emplace-041.adoc[_» more..._]#

Try to emplace an element with `key` using a placement hint.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class... ARGS>
xref:BloombergLP/bdlc/FlatHashMap/iterator.adoc[FlatHashMap<KEY, VALUE, HASH, EQUAL>::iterator]
xref:BloombergLP/bdlc/FlatHashMap/try_emplace-01.adoc[try_emplace](
    xref:BloombergLP/bdlc/FlatHashMap/const_iterator.adoc[const_iterator] hint,
    KEY const& key,
    ARGS&&... args);
----

[.small]#xref:BloombergLP/bdlc/FlatHashMap/try_emplace-01.adoc[_» more..._]#

Try to emplace an element with `key` using a placement hint.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class LOOKUP_KEY,
    class... ARGS>
xref:BloombergLP/bdlc/FlatHashMap/iterator.adoc[iterator]
xref:BloombergLP/bdlc/FlatHashMap/try_emplace-0d.adoc[try_emplace](
    xref:BloombergLP/bdlc/FlatHashMap/const_iterator.adoc[const_iterator] hint,
    LOOKUP_KEY&& key,
    ARGS&&... args)
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
         && BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;
----

[.small]#xref:BloombergLP/bdlc/FlatHashMap/try_emplace-0d.adoc[_» more..._]#

== Return Value

* pair of iterator to the element and whether insertion occurred
* iterator to the existing or newly inserted element

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| key of the element to emplace (may be moved from)
| *args*
| arguments forwarded to construct the mapped value
| *hint*
| iterator hint (ignored)
|===


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