Language/12_Expressions/18_Assignment_A04_t09.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 C.v = e proceeds as follows:
 *   If C does not denote a class available in the current scope, the assignment
 * is treated as an assignment e1.v = e, where e1 is the expression C.
 *   Otherwise, the expression e is evaluated to an object o. If C does not declare,
 * implicitly or explicitly, a setter v =, then a NoSuchMethodError is thrown.
 *   Otherwise, the setter C.v = is invoked with its formal parameter bound to o.
 * The value of the assignment expression is o.
 *   It is a static warning if C does not declare, implicitly or explicitly, a
 * setter v =.
 *   In checked mode, it is a dynamic type error if o is not null and the interface
 * of the class of o is not a subtype of the declared static type of C.v.
 *   It is a static type warning if the static type of e may not be assigned to the
 * static type of C.v. The static type of the expression C.v = e is the static type
 * of e.
 * @description Checks that if class C does not declare a setter v=, then
 * e is evaluated before throwing NoSuchMethodError.
 * @static-warning
 * @author ilya
 */

import "../../Utils/expect.dart";

class C {}

int count=0;

incCount() => ++count;

main() {
  Expect.throws(() {
    C.noSetter = incCount(); // static warning: no setter
  }, (e) => e is NoSuchMethodError);

  Expect.equals(1, count);
}