[#BloombergLP-balm-MetricRegistry-addId]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balm.adoc[balm]::xref:BloombergLP/balm/MetricRegistry.adoc[MetricRegistry]::addId
:relfileprefix: ../../../
:mrdocs:

Add the specified `category` and `name` to this registry, unless it has already been registered, and return a `balm::MetricId` object identifying the newly‐registered metric. If the indicated metric has already been registered, the returned `balm::MetricId` object will _not_ be valid (i.e., `isValid` will return `false`). The behavior is undefined unless `category` and `name` are null‐terminated.

== Synopsis

Declared in `<balm_metricregistry.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/balm/MetricId.adoc[MetricId]
addId(
    char const* category,
    char const* name);
----


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