Language/12_Expressions/12_Instance_Creation/1_New_A12_t01.dart

/*
 * Copyright (c) 2011, 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 If q is a redirecting factory constructor of the form
 * T(p1, ..., pn+k ) = c; or of the form T.id(p1, ..., pn+k ) = c;
 * then the result of the evaluation of e is equivalent to evaluating the expression
 * [V1, ..., Vm /T1, ..., Tm ](new c(a1, ..., an, xn+1:an+1, ..., xn+k: an+k )).
 * @description Checks that evaluation of redirecting factory constructor is equivalent to 
 * evaluation of the constructor it's redirecting to.
 * @author kaigorodov
 * @reviewer rodionov
 */
import "../../../Utils/expect.dart";

class R<T> {
  factory R.fc(T arg) = C;
}

class C<T> implements R<T> {
   T value;
   
   C(this.value) {}
   
   int get hashCode { 
     return value.hashCode;
   }

   bool operator ==(other) {
     if (identical(value, null)) {
       return identical(other.value, null);
     }
     return value==other.value;
   }
}

main() {
  String foo = "foo";
  R<String> r1 = new R<String>.fc(foo);
  R<String> r2 = new C<String>(foo);
  Expect.equals(r1, r2);
}