Iterator grammar

test/src/main.mist

@@ -1,5 +1,7 @@
 void main() {
-    for (usize mut i = 0; i < 10; i = i + 1;) {
+    let iter = vec!(1, 2, 3, 4, 5);
+
+    for (i in iter) {
         println!("{i}");
     }
 }