Language/13_Statements/06_For/1_For_Loop_A01_t06.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 Execution of a for statement of the form for (var v = e' ; c; e) s 
 * proceeds as follows:
 * If c is empty then let c' be true otherwise let c' be c.
 * First the variable declaration statement var v = e' is executed. Then:
 * 
 * 1. If this is the first iteration of the for loop, let v' be v. Otherwise, let v' be
 *    the variable v'' created in the previous execution of step 4.
 * 2. The expression [v'/v]c is evaluated and subjected to boolean conversion.
 *    If the result is false, the for loop completes. Otherwise, execution
 *    continues at step 3.
 * 3. The statement [v'/v]s is executed.
 * 4. Let v'' be a fresh variable. v'' is bound to the value of v'.
 * 5. The expression [v''/v]e is evaluated, and the process recurses at step 1.
 * @description Checks that the expression [v''/v]e is evaluated at the end of each iteration,
 * and the process recurses.
 * @author rodionov
 * @reviewer iefremov
 */
import "../../../Utils/expect.dart";

main() {
  var count = 0;
  for (var i = 0; i < 10; i++, count += i) {}
  Expect.equals(55, count);

  int foo;
  for (var i = 0; i < 10; foo = i % 3, i++) {
    if(i > 0) { // e is not evaluated before the first iteration
      Expect.equals((i - 1) % 3, foo);
    }
  }
}