Language/Expressions/Assignment/variable_assignment_t05.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 a of the form v = e proceeds as
 * follows:
 * Let d be the innermost declaration whose name is v or v =, if it exists.
 * ...
 * If d is the declaration of a local variable, the expression e is evaluated to
 * an object o. Then, the variable v is bound to o unless v is final or const,
 * in which case a dynamic error occurs. If no error occurs, the value of the
 * assignment expression is o.
 * @description Checks that an assignment of the form v = e where v is a
 * variable declared outside of a closure is evaluated correctly inside of it.
 * @author msyabro
 */

import '../../../Utils/expect.dart';

class A {
  foo() {
    var i = 0;
    return () => i = i + 1;  //an assignment inside a closure
  }
}

main() {
  var f = new A().foo();
  Expect.equals(1, f());
  Expect.equals(2, f());
}