Language/05_Variables/1_Evaluation_of_Implicit_Variable_Getters_A01_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 Let d be the declaration of a variable v.  If d is a local or
 * instance variable, then the invocation of the implicit getter of v
 * evaluates to the value stored in v.
 * If d is a static or library variable then the implicit getter method of v
 * executes as follows:
 * Non-constant variable declaration with initializer. If d is of one of the
 * forms var v = e; , T v = e; , final v = e; , final T v = e; , static v = e;
 * ,static T v = e; , static final v = e;  or static final T v = e; and no
 * value has yet been stored into v then the initializer expression e is
 * evaluated. If, during the evaluation of e, the getter for v is invoked,
 * a CyclicInitializationError is thrown. If the evaluation succeeded yielding
 * an object o, let r = o, otherwise let r = null. In any case, r is stored
 * into v. The result of executing the getter is r.
 * Constant variable declaration. If d is of one of the forms const v = e; ,
 * const T v = e; , static const v = e;  or static const T v = e; the result
 * of the getter is the value of the compile time constant e. Note that a
 * compile time constant cannot depend on itself, so no cyclic references can
 * occur. Otherwise
 * Variable declaration without initializer. The result of executing the
 * getter method is the value stored in v.
 * @description Checks that the initializer expression is evaluated at
 * the first use of a static variable.
 * @author msyabro
 * @reviewer iefremov
 */
import "../../Utils/expect.dart";

var counter = 0;

class C {
  static var sVar = ++counter;
  static int sTyped = ++counter;
  static final sFinal = ++counter;
  static final int sFinalTyped = ++counter;
}


main() {
  Expect.equals(0, counter);
  Expect.equals(1, C.sVar);
  Expect.equals(1, counter);
  Expect.equals(2, C.sTyped);
  Expect.equals(2, counter);
  Expect.equals(3, C.sFinal);
  Expect.equals(3, counter);
  Expect.equals(4, C.sFinalTyped);
  Expect.equals(4, counter);
}