multiple assign

examples/23-quicksort.sx

@@ -8,16 +8,12 @@ quick_sort :: (items: []$T) {
         while j < hi {
             if items[j] < pivot {
                 i += 1;
-                tmp := items[i];
-                items[i] = items[j];
-                items[j] = tmp;
+                items[i], items[j] = items[j], items[i];
             }
             j += 1;
         }
         i += 1;
-        tmp := items[i];
-        items[i] = items[hi];
-        items[hi] = tmp;
+        items[i], items[hi] = items[hi], items[i];
         i;
     }
 

examples/50-smoke.sx

@@ -1012,5 +1012,32 @@ END;
     print("flags-explicit: {}\n", wf);
     print("flags-explicit-raw: {}\n", cast(s64) wf);
 
+    // --- Multi-target assignment (swap) ---
+    print("--- swap ---\n");
+
+    // Variable swap
+    {
+        sa := 10;
+        sb := 20;
+        sa, sb = sb, sa;
+        print("var swap: {} {}\n", sa, sb);
+    }
+
+    // Array element swap
+    {
+        sarr : [3]s64 = .[1, 2, 3];
+        sarr[0], sarr[2] = sarr[2], sarr[0];
+        print("arr swap: {} {}\n", sarr[0], sarr[2]);
+    }
+
+    // 3-way rotation
+    {
+        ra := 1;
+        rb := 2;
+        rc := 3;
+        ra, rb, rc = rc, ra, rb;
+        print("3-way: {} {} {}\n", ra, rb, rc);
+    }
+
     print("=== DONE ===\n");
 }