[#BloombergLP-balm-operator_lt]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balm.adoc[balm]::operator<
:relfileprefix: ../../
:mrdocs:

Return `true` if the specified `lhs` metric id is less than (ordered before) the specified `rhs` metric id, and return `false` otherwise'. The `lhs` is considered less if the (unsigned) _address_ of the contained `MetricDescription` object is numerically less than the `rhs` description. Note that this function does _not_ provide any form of alphabetic ordering, and is logically equivalent to the expression `lhs.description() < rhs.description()`.

== Synopsis

Declared in `<balm_metricid.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
operator<(
    xref:BloombergLP/balm/MetricId.adoc[MetricId] const& lhs,
    xref:BloombergLP/balm/MetricId.adoc[MetricId] const& rhs);
----


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