first commit

exercises/08_enums/enums2.rs

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+#[derive(Debug)]
+struct Point {
+    x: u64,
+    y: u64,
+}
+
+#[derive(Debug)]
+enum Message {
+    // TODO: Define the different variants used below.
+}
+
+impl Message {
+    fn call(&self) {
+        println!("{self:?}");
+    }
+}
+
+fn main() {
+    let messages = [
+        Message::Resize {
+            width: 10,
+            height: 30,
+        },
+        Message::Move(Point { x: 10, y: 15 }),
+        Message::Echo(String::from("hello world")),
+        Message::ChangeColor(200, 255, 255),
+        Message::Quit,
+    ];
+
+    for message in &messages {
+        message.call();
+    }
+}