pkg/front_end/testcases/inference_new/infer_instance_field_ref.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.
// @dart=2.9
/*@testedFeatures=inference*/
library test;

class A {
  B b;
}

class B {
  C c;
}

class C {}

class D extends C {}

var a = new A();
var x = a. /*@target=A.b*/ b. /*@target=B.c*/ c;
var y = a. /*@ type=B* */ /*@target=A.b*/ /*@target=B.c*/ b
    . /*@target=B.c*/ c /*@target=C.==*/ ??= new D();

main() {}