LanguageFeatures/Set-literals/set_literals_A03_t02.dart

// Copyright (c) 2018, 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 T be the explicit or inferred type argument to the type
/// literal. It's a compile-time error if the static type of any element
/// expression is not assignable to T.
///
/// @description Checks that it's a compile-time error if the static type of any
/// element expression is not assignable to T
/// @author sgrekhov@unipro.ru

class A {
  const A();
}
class B extends A {
  const B();
}
class C extends B {
  const C();
}

test<T extends B>(Set<T> s) {}

main() {
  test<B>({new B(), new C(), new A()});
  //                         ^^^^^^^
  // [analyzer] COMPILE_TIME_ERROR.SET_ELEMENT_TYPE_NOT_ASSIGNABLE
  //                             ^
  // [cfe] A value of type 'A' can't be assigned to a variable of type 'B'.
  test<B>(const {const B(), const C(), const A()});
  //                                   ^^^^^^^^^
  // [analyzer] COMPILE_TIME_ERROR.SET_ELEMENT_TYPE_NOT_ASSIGNABLE
  //                                         ^
  // [cfe] A value of type 'A' can't be assigned to a variable of type 'B'.
}