LanguageFeatures/nnbd/flow-analysis/reachability_continue_A01_t04.dart

// Copyright (c) 2020, 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 Continue statement: If N is a statement of the form continue [L];
/// then:
///
///  Let S be the statement targeted by the continue. If L is not present, this
///  is the innermost do, for, or while statement. Otherwise it is the do, for,
///  or while statement with a label matching L, or the switch statement
///  containing a switch case with a label matching L.
///
///  Update continue(S) = join(continue(S), before(N)).
///
///  Let after(N) = unreachable(before(N)).
///
/// @description Checks reachability after continue statement. Test for-in loop
/// and a label
///
/// @author sgrekhov@unipro.ru

// Requirements=nnbd-strong
import "../../../Utils/expect.dart";

main() {
  late int i;
  var collection1 = [3, 1, 4, 1, 5];
  var collection2 = [2, 7, 1, 8, 2];
  outerLoop:
  for (var j in collection1) {
    for (var k in collection2) {
      continue outerLoop;
      i = 42; // Variable is initialized in a dead code
    }
  }
  try {
    // 'i' is treated here by flow analysis as possibly assigned, so it is a
    // runtime (not a compile time) error to read it
    i;
    Expect.fail("Error expected");
  } on Error {
    // Ok, expected
  }
}