pub trait ValidIdempotenceFor<R: Retries>: Sealed<R> { }Expand description
Marker trait identifying that the idempotence property is valid for the given stream ordering.
Definition (aggregations, |acc: &mut A, item: T|): for any accumulator value
and any item x, applying the closure with x twice in a row must produce the same
final accumulator as applying it once. For reduce, whose accumulator is seeded with
the first element, applying the closure to an accumulator equal to x with the item
x must also leave the accumulator equal to x. On unordered streams, combined with
commutativity, this makes the final aggregate independent of duplicates at any
position. Definition (for_each, |item: T|): processing an item twice in a row
must leave the mutably-captured state in the same final value as processing it once.
Dyn Compatibility§
This trait is dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety".