// Copyright (c) 2019, 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 A write to a field or variable which is marked final and late is a
/// runtime error unless the field or variable was declared with no initializer
/// expression, and there have been no previous writes to the field or variable
/// (including via an initializing formal or an initializer list entry).
///
/// @description Check that if a final late variable is declared with no
/// initializer expression, and there have been no previous writes to it, then
/// write attempt to this field or variable is not an error, but the second
/// attempt of write to it is a runtime error
/// @author sgrekhov@unipro.ru

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

class A {
  late final String a1;
  late final String? a2;

  A(this.a1, this.a2);
}

class C {
  late final String c1;
  late final String? c2;

  C(String v1, String v2) : this.c1 = v1, this.c2 = v2;
}

main() {
  A a = new A("No woman", "no cry");
  Expect.throws(() {a.a1 = "Lily was here";});
  Expect.throws(() {a.a2 = "Lily was here";});
  Expect.equals("No woman", a.a1);
  Expect.equals("no cry", a.a2);

  C c = new C("No woman", "no cry");
  Expect.throws(() {c.c1 = "Lily was here";});
  Expect.throws(() {c.c2 = "Lily was here";});
  Expect.equals("No woman", c.c1);
  Expect.equals("no cry", c.c2);
}