[#bsl-map-0a7-try_emplace-04]
= xref:bsl.adoc[bsl]::xref:bsl/map-0a7.adoc[map]::try_emplace
:relfileprefix: ../../
:mrdocs:

Try to emplace an element with transparent `key` near `hint`.

== Synopsis

Declared in `<bslstl_map.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class LOOKUP_KEY,
    class... Args>
xref:bsl/map-0a7/iterator.adoc[iterator]
try_emplace(
    xref:bsl/map-0a7/const_iterator.adoc[const_iterator] hint,
    LOOKUP_KEY&& key,
    Args&&... args)
requires BloombergLP::bslmf::IsTransparentPredicate<COMPARATOR,
                                                   LOOKUP_KEY>::value;
----

== Description

Insert at the specified `hint` using the transparent `LOOKUP_KEY` and the specified constructor `args`, or return an iterator to an existing entry.

== Return Value

iterator to the existing or newly inserted element

== Parameters

[cols="1,4"]
|===
| Name| Description
| *hint*
| iterator hint for the insertion position
| *key*
| transparent key for the element to emplace
| *args*
| constructor arguments for the mapped value
|===


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