Connected values

Connected values

Run from the repository or distribution root. Put xen on PATH, or substitute ./bin/xen.

Run

xen check examples/recursive_data.xen
xen run examples/recursive_data.xen

Expected output

30

Complete source

recursive_data.xen

// SPDX-License-Identifier: MIT OR Apache-2.0
struct Node { value: Int, next: Option<Box<Node>> }

fn sum(node: Node) -> Int {
    let rest = match node.next {
        Option.Some(next) => sum(next.into_inner()),
        Option.None => 0,
    };
    return node.value + rest;
}

fn main() {
    let last = Node { value: 20, next: Option<Box<Node>>.None };
    let first = Node { value: 10, next: Option.Some(box(last)) };
    println(sum(first));
}

Download file

Build an executable

xen build examples/recursive_data.xen -o app

Run the generated executable on a compatible Linux machine.