[#BloombergLP-bdlt-DatetimeInterval-addIntervalIfValid]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/DatetimeInterval.adoc[DatetimeInterval]::addIntervalIfValid
:relfileprefix: ../../../
:mrdocs:

Add to this time interval the specified number of `days`, and the optionally specified number of `hours`, `minutes`, `seconds`, `milliseconds`, and `microseconds`. Return 0 if the resulting time interval value is valid (i.e., the days field must not overflow an `int`) and a non‐zero value (with no effect) otherwise. Note that the arguments may be supplied using a mixture of positive, negative, and 0 values.

== Synopsis

Declared in `<bdlt_datetimeinterval.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
addIntervalIfValid(
    int days,
    xref:BloombergLP/bsls/Types/Int64.adoc[bsls::Types::Int64] hours = 0,
    xref:BloombergLP/bsls/Types/Int64.adoc[bsls::Types::Int64] minutes = 0,
    xref:BloombergLP/bsls/Types/Int64.adoc[bsls::Types::Int64] seconds = 0,
    xref:BloombergLP/bsls/Types/Int64.adoc[bsls::Types::Int64] milliseconds = 0,
    xref:BloombergLP/bsls/Types/Int64.adoc[bsls::Types::Int64] microseconds = 0);
----


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