pkg/front_end/testcases/patterns/issue51260.dart

// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

foo(dynamic x) {
  switch (x) {
    case [int a]:
    case {'a': int a}:
      return a;
    default:
      return 0;
  }
}