Language/Expressions/Assignment/expression_assignment_dynamic_error_t02.dart

// Copyright (c) 2011, 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.

/**
 * @assertion Evaluation of an assignment of the form e1.v = e2 proceeds as
 * follows:
 * The expression e1 is evaluated to an object o1. Then, the expression e2 is
 * evaluated to an object o2.
 * ...
 * It is a dynamic type error if o2 is not null and the interface of the class
 * of o2 is not a subtype of the actual type of e1.v.
 * @description Checks that it is a dynamic type error if o2 is not null and the
 * interface of the class of o2 is not a subtype of the actual type of e1.v.
 * @author msyabro
 */

import '../../../Utils/dynamic_check.dart';

f(x) => x;

class A {}
class B extends A {}

class C {
  int? v;
  B? b;
}

main() {
  C c = new C();
  checkTypeError( () {
    c.v = f(true); //to avoid static warning
  });
  checkTypeError( () {
    c.v = f(""); //to avoid static warning
  });
  checkTypeError( () {
    c.v = f(0.2); //to avoid static warning
  });
  checkTypeError( () {
    c.b = f(new A()); //to avoid static warning
  });
}