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

Subtract the specified `rhs` time interval from this object.

== 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);
----

== Description

Subtract from 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).

== Return Value

a reference providing modifiable access to this object

== Parameters

[cols="1,4"]
|===
| Name| Description
| *rhs*
| time interval to subtract
|===


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