trailing commas

examples/50-smoke.sx

@@ -3120,5 +3120,31 @@ END;
         }
     }
 
+    // ── Trailing commas ──────────────────────────────────────────
+    print("=== Trailing Commas ===\n");
+    {
+        // Struct literal with trailing comma
+        Vec4 :: struct { x: f64; y: f64; z: f64; w: f64; }
+        v := Vec4.{
+            x = 1.0,
+            y = 2.0,
+            z = 3.0,
+            w = 4.0,
+        };
+        assert(v.x == 1.0);
+        assert(v.w == 4.0);
+
+        // Function call with trailing comma
+        add :: (a: s64, b: s64) -> s64 { return a + b; }
+        r := add(10, 20,);
+        assert(r == 30);
+
+        // Array literal with trailing comma
+        arr := s64.[1, 2, 3,];
+        assert(arr[2] == 3);
+
+        print("trailing commas ok\n");
+    }
+
     print("=== DONE ===\n");
 }