pkg/front_end/testcases/inference/type_promotion_simple.dart

// Copyright (c) 2017, 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.

/*@testedFeatures=inference*/
library test;

main() {
  num n = 0;
  if (n is int) {
    var /*@type=int*/ i = /*@promotedType=int*/ n;
  }
}