Language/Expressions/Assignment/top_level_assignment_t04.dart

// Copyright (c) 2016, 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 Evaluation of an assignment a of the form v = e proceeds as
/// follows:
/// Let d be the innermost declaration whose name is v or v =, if it exists.
/// ...
/// If d is the declaration of a library variable, top level getter or top level
/// setter, the expression e is evaluated to an object o. Then the setter v = is
/// invoked with its formal parameter bound to o. The value of the assignment
/// expression is o.
/// @description Checks that if d is top level setter, then the setter v= is
/// invoked with its formal parameter bound to o and  the value of the assignment
/// expression is o.
/// @author sgrekhov@unipro.ru


import '../../../Utils/expect.dart';

int? _v;

void set v(int val) {
  _v = val;
}

main() {
  Expect.equals(1, v = 1);
  Expect.equals(2, v = 2);
  Expect.equals(1, v = 1);
  Expect.equals(3, v = 1 + 2);
}