Split a program across files

Split a program across files

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

Run

xen check examples/modules/app.xen
xen run examples/modules/app.xen

Expected output

tea: 3

Complete source

modules/app.xen

// SPDX-License-Identifier: MIT OR Apache-2.0
module app;
import shop.model as model;
import shop.view as view;

fn main() {
    let item = model.Item { name: "tea", price: 3 };
    view.show(item);
}

Download file

Save all three files with this structure. The shop modules are support files, not standalone programs.

examples/modules/
├── app.xen
└── shop/
    ├── model.xen
    └── view.xen

shop/model.xen

// SPDX-License-Identifier: MIT OR Apache-2.0
module shop.model;

struct Item { name: String, price: Int }

shop/model.xen

shop/view.xen

// SPDX-License-Identifier: MIT OR Apache-2.0
module shop.view;
import shop.model as model;

fn show(item: model.Item) {
    println(item.name + ": " + int_to_str(item.price));
}

shop/view.xen