[#bsl-unordered_map-02b-insert_or_assign-0b9]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_map-02b.adoc[unordered_map]::insert_or_assign
:relfileprefix: ../../
:mrdocs:

Insert or assign `obj` under transparent `key`.

== Synopsis

Declared in `<bslstl_unorderedmap.h>`

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

== Description

If a key equivalent to the specified `key` already exists in this unordered_map, assign the specified `obj` to the value associated with that key, and return a pair containing an iterator referring to the existing item and `false`. Otherwise, insert into this map a newly‐created `value_type` object, constructed from `(std::forward<KEY>(key), std::forward<BDE_OTHER_TYPE>(obj)...))`, and return a pair containing an iterator referring to the newly‐created entry and `true`.

Note: implemented inline due to Sun CC compilation error.

== Return Value

iterator to the element and whether insertion occurred

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| key to look up
| *obj*
| mapped value to insert or assign
|===


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