Method read_prev

raphtory/src/db/task/node/eval_node.rs:206–218

Read the prev value of the node state using the given accumulator. Returns a default value if the value is not present.

(
        &self,
        agg_r: &AccId<A, IN, OUT, ACC>,
    )

    /// Read the prev value of the node state using the given accumulator.
    /// Returns a default value if the value is not present.
    pub fn read_prev<A, IN, OUT, ACC: Accumulator<A, IN, OUT>>(
        &self,
        agg_r: &AccId<A, IN, OUT, ACC>,
    ) -> OUT
    where
        A: StateType,
        OUT: std::fmt::Debug,
    {
        self.node_state()
            .shard()
            .read_with_pid(self.eval_graph.ss + 1, self.state_pos, agg_r)
            .unwrap_or(ACC::finish(&ACC::zero()))
    }

    pub fn read_global_state_prev<A, IN, OUT, ACC: Accumulator<A, IN, OUT>>(
        &self,