LanguageFeatures/nnbd/weak/flow-analysis/definite_assignment_A08_t05.dart

// Copyright (c) 2021, 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 assigned is a boolean value indicating whether the variable has
 * definitely been assigned at the given point in the source code. When assigned
 * is true, we say that the variable is definitely assigned at that point.
 *
 * @description Checks definite assignment and try-catch statement
 *
 * @author sgrekhov@unipro.ru
 */
// Requirements=nnbd-weak

test() {
  int n;
  try {
    n = 42;
    throw new Exception();
  } on String catch (_) {
    n = 42;
  } on int catch (_) {
    n = 42;
  }
  n; // It's not an error to read local non-nullable variable when it is definitely assigned
}

main() {
  try {
    test();
  } catch (_) {}
}