hello world

src/lib.rs

@@ -0,0 +1,14 @@
+pub fn add(left: u64, right: u64) -> u64 {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}

src/main.rs

@@ -0,0 +1,39 @@
+use winit::application::ApplicationHandler;
+use winit::event::WindowEvent;
+use winit::event_loop::{ActiveEventLoop, ControlFlow, EventLoop};
+use winit::window::{Window, WindowId};
+
+#[derive(Default)]
+struct App {
+    window: Option<Window>,
+}
+
+impl ApplicationHandler for App {
+    fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+        self.window = Some(
+            event_loop
+                .create_window(Window::default_attributes())
+                .unwrap(),
+        );
+    }
+
+    fn window_event(&mut self, event_loop: &ActiveEventLoop, _id: WindowId, event: WindowEvent) {
+        match event {
+            WindowEvent::CloseRequested => {
+                event_loop.exit();
+            }
+            WindowEvent::RedrawRequested => {
+                self.window.as_ref().unwrap().request_redraw();
+            }
+            _ => (),
+        }
+    }
+}
+
+fn main() {
+    let event_loop = EventLoop::new().unwrap();
+    event_loop.set_control_flow(ControlFlow::Poll);
+    event_loop.set_control_flow(ControlFlow::Wait);
+    let mut app = App::default();
+    event_loop.run_app(&mut app).unwrap();
+}