LanguageFeatures/Primary-constructors/static_processing_A23_t02.dart

// Copyright (c) 2025, 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 The semantics of the primary constructor is found in the
/// following steps, where `D` is the class, mixin class, extension type, or
/// enum declaration in the program that includes a primary constructor `k`, and
/// `D2` is the result of the derivation of the semantics of `D`. The derivation
/// step will delete elements that amount to the primary constructor.
/// Semantically, it will add a new constructor `k2`, and it will add zero or
/// more instance variable declarations.
/// ...
/// The formal parameter list `L2` of `k2` is identical to `L`, except that each
/// formal parameter is processed as follows.
/// ...
/// - Otherwise, it is a declaring parameter. A formal parameter (named or
///   positional) of the form `var T p` or `final T p` where `T` is a type and
///   `p` is an identifier is replaced in `L2` by `this.p`, along with its
///   default value, if any. The same is done in the case where the formal
///   parameter has the form `var p` or `final p`, and `T` is the declared type
///   of `p` which was obtained by inference. If the parameter has the modifier
///   `var` and `D` is an extension type declaration then a compile-time error
///   occurs. Otherwise, if `D` is not an extension type declaration, a semantic
///   instance variable declaration corresponding to the syntax `T p;` or
///   `final T p;` is added to `D2`. It includes the modifier `final` if and
///   only if the parameter in `L` has the modifier `final` and `D` is not an
///   extension type declaration. Otherwise, if `D` is an extension type
///   declaration then the name of `p` specifies the name of the representation
///   variable. In all cases, if `p` has the modifier `covariant` then this
///   modifier is removed from the parameter in `L2`, and it is added to the
///   instance variable declaration named `p`.
///
/// @description Check that it is a compile-time error if a primary constructor
/// contains two formal parameters with the same name. Test declaring vs. super
/// parameters.
/// @author sgrekhov22@gmail.com

// SharedOptions=--enable-experiment=primary-constructors

class A<T> {
  final T? v;
  A(this.v);
}

class C1<T>(@override var T? v, super.v) extends A<T>;
//                                    ^
// [analyzer] unspecified
// [cfe] unspecified

class C2(@override final String v, [super.v = ""]) extends A<String>;
//                                        ^
// [analyzer] unspecified
// [cfe] unspecified

class C3<T>(final T? v, {super.v}) extends A<T>;
//                             ^
// [analyzer] unspecified
// [cfe] unspecified

class C4(final String v, {required super.v}) extends A<String>;
//                                       ^
// [analyzer] unspecified
// [cfe] unspecified

main() {
  print(C1);
  print(C2);
  print(C3);
  print(C4);
}