[#BloombergLP-bsls-operator_plus-01] = xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bsls.adoc[bsls]::operator+ :relfileprefix: ../../ :mrdocs: Return a `TimeInterval` value that is the sum of the specified `lhs` and `rhs` time intervals. The behavior is undefined unless (1) operands of type `double` can be converted to valid `TimeInterval` objects, and (2) the resulting time interval can be represented with a 64‐bit signed integer. == Synopsis Declared in `<bsls_timeinterval.h>` [source,cpp,subs="verbatim,replacements,macros,-callouts"] ---- xref:BloombergLP/bsls/TimeInterval.adoc[bsls::TimeInterval] operator+( xref:BloombergLP/bsls/TimeInterval.adoc[TimeInterval] const& lhs, xref:BloombergLP/bsls/TimeInterval.adoc[TimeInterval] const& rhs); ---- [.small]#Created with https://www.mrdocs.com[MrDocs]#