compute-graph

Generic DAG for combining nodes that do some computation on a list of inputs of the same type, outputing the same or another type. Just implement the 'Compute' trait for your type and add it to the graph.

#[derive(Clone)]
struct Sum(f64);
impl Compute for Sum {
    type In = f64;
    type Out = f64;
    fn compute(&self, input: &[&Self::In]) -> Self::Out {
        input.iter().map(|v| *v).sum()
    }
}

let mut graph = Graph::new();

let sum_handle = graph.insert_node("sum", Sum(42.0));
let const_handle = graph.insert_node("the_answer", Constant(42.0));

graph.add_input(&sum_handle, &const_handle).unwrap();
graph.connect_to_input(&sum_handle);
graph.set_output_node(&sum_handle);

let compute_graph = graph.build::<f64, f64>().unwrap();
let value = compute_graph.compute(&1.0);
assert_eq!(value, 43.0);