//// [recursiveTupleTypes2.ts] interface Tree1 { children: [Tree1, Tree2]; } interface Tree2 { children: [Tree2, Tree2]; } let tree1: Tree1; let tree2: Tree2; tree1 = tree2; tree2 = tree1; //// [recursiveTupleTypes2.js] var tree1; var tree2; tree1 = tree2; tree2 = tree1;