LanguageFeatures/Constructor-tear-offs/named_constructor_A02_t02.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 A named constructor tear-off expression of one of the forms above
/// evaluates to a function value which could be created by tearing off a
/// corresponding constructor function, which would be a static function defined
/// on the class denoted by [C], with a fresh name here represented by adding
/// [$tearoff]:
///
///   static C name$tearoff<typeParams>(params) => C<typeArgs>.name(args);
///
/// @description Checks constructor tear-off expression for generic class.
/// @author iarkh@unipro.ru

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

class C<T> {
  static int called = 0;

  C() {}

  C.constr(expected) {
    Expect.equals(expected, T);
    called++;
  }
}

main() {
  Expect.isTrue(C.constr@tearoff is C Function<dynamic>(dynamic));
  C c = C.constr@tearoff(dynamic);
  Expect.equals(1, C.called);

  C c1 = C<int>.constr@tearoff(int);
  Expect.equals(2, C.called);
}