[#BloombergLP-ball-CategoryManager_RadixTree-emplace]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/ball.adoc[ball]::xref:BloombergLP/ball/CategoryManager_RadixTree.adoc[CategoryManager_RadixTree]::emplace
:relfileprefix: ../../../
:mrdocs:

Insert into this tree an entry with the specified `key` and a newly created `t_VALUE` object, constructed by forwarding `get_allocator()` (if required) and the specified (variable number of) `args` to the corresponding constructor of `t_VALUE`. Return a pair consisting of a reference to the value associated with `key` (whether newly inserted or already existing) and a boolean indicating whether insertion took place (`true` if the key was not already present, `false` otherwise). This method requires that `t_VALUE` be `emplace‐constructible` from `args`.

== Synopsis

Declared in `<ball_categorymanager_radixtree.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class... Args>
xref:BloombergLP/ball/CategoryManager_RadixTree/EmplaceResult.adoc[CategoryManager_RadixTree<t_VALUE>::EmplaceResult]
emplace(
    std::string_view const& key,
    Args&&... args);
----


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