Language/15_Types/7_Type_Void_A04_t03.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 It is possible to return the result of a void method from
 * within a void method. One can also return null; or a value of type Dynamic.
 * Returning any other result will cause a type warning. In checked mode, 
 * a dynamic type error would arise if a non-null object was returned from 
 * a void method (since no object has runtime type dynamic).
 * @description Checks that returning a non-null value with non-dynamic static
 * type from within a void method results in both static type warning and a dynamic
 * type error in checked mode.
 * @static-warning
 * @author rodionov
 * @reviewer iefremov
 */
import "../../Utils/dynamic_check.dart";

void foo() {
  String s = "foo";
  return s; /// static type warning 
}

main() {
  checkTypeError(() {
    foo();
  });
}