[#BloombergLP-bdlt-DatetimeInterval-operator_plus_eq]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/DatetimeInterval.adoc[DatetimeInterval]::operator+=
:relfileprefix: ../../../
:mrdocs:

Add to this time interval the value of the specified `rhs` time interval, and return a reference providing modifiable access to this object. The behavior is undefined unless the resulting time interval value is valid (i.e., the days field must not overflow a 32‐bit integer).

== Synopsis

Declared in `<bdlt_datetimeinterval.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bdlt/DatetimeInterval.adoc[DatetimeInterval]&
operator+=(xref:BloombergLP/bdlt/DatetimeInterval.adoc[DatetimeInterval] const& rhs);
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#