Language/Reference/Operator_Precedence/precedence_13_additive_t06.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
/// Description    Operator                          Associativity Precedence
/// Additive         +, -                              Left          13
/// @description Check that '-' operator has left associativity
/// @author sgrekhov@unipro.ru

import "../../../Utils/expect.dart";

String log = "";

class C {
  String id = "";

  C operator -(C val) {
    log += id;
    return val;
  }

  C(this.id);
}

main() {
  C c1 = new C("c1");
  C c2 = new C("c2");
  C c3 = new C("c3");
  C c4 = new C("c4");

  C c = c1 - c2 - c3 - c4;
  Expect.equals("c4", c.id);
  Expect.equals("c1c2c3", log);
}