LanguageFeatures/Super-parameters/semantics_A06_t22.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 Let C be a non-redirecting generative constructor with, implicit
/// or explicit, super-constructor invocation s at the end of its initializer
/// list. Let D be the superclass constructor targeted by s (which must exist).
///
/// We define the associated super-constructor parameter for each
/// super-parameter p of C as follows:
///
/// If p is a positional parameter, let j be the number of positional
/// super-parameters of C up to and including p in source order. The associated
/// super-constructor parameter of p is the jth positional parameter of D
/// (1-based), if D has that many positional parameters.
/// If p is a named parameter with name n, the associated super-constructor
/// parameter is the named parameter of D with name n, if D has a named
/// parameter with that name.
///
/// It’s a compile-time error if a non-redirecting generative
/// constructor has a super-parameter with no associated super-constructor
/// parameter.
///
/// @description Check that it is no compile-time error if a non-redirecting
/// generative constructor has a super-parameter with associated
/// super-constructor parameter.
/// @author sgrekhov@unipro.ru

// SharedOptions=--enable-experiment=super-parameters

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

class S {
  int s1;
  S(int x1) : s1 = x1;
}

class C extends S {
  C([super.x1 = 0]);
}

main() {
  C c1 = C();
  Expect.equals(0, c1.s1);

  C c2 = C(42);
  Expect.equals(42, c2.s1);
}