add Ord to Timestamp
@@ -14,7 +14,7 @@ use abomonation::Abomonation;
// TODO : Change Copy requirement to Clone;
/// A composite trait for types that serve as timestamps in timely dataflow.
-pub trait Timestamp: Clone+Eq+PartialOrder+Default+Debug+Send+Any+Abomonation+Hash {
+pub trait Timestamp: Clone+Eq+PartialOrder+Default+Debug+Send+Any+Abomonation+Hash+Ord {
/// A type summarizing action on a timestamp along a dataflow path.
type Summary : PathSummary<Self> + 'static;
}
