LanguageFeatures/Constant-update-2018/CastOperator_A03_t03.dart

// Copyright (c) 2019, 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.

// @dart = 2.9

/// @assertion An expression of the form [e as T] is accepted as a potentially
/// and compile-time constant expression if [e] is potentially constant or
/// compile-time constant, respectively, and [T] is a compile-time constant type.
/// A compile-time constant type means any type that doesn't contain free type
/// variables, so the type expression always resolves to the exact same type.
/// @description Checks that an expression of the form [e as T] is not accepted
/// and causes compile time error if parameter type is incorrect.
/// @author iarkh@unipro.ru

dynamic anObject = "";

class MyClass {
  final String obj;
  const MyClass(Object o) : obj = o as String;
}

main() {
  const MyClass c = MyClass(anObject);
//                          ^
// [analyzer] unspecified
// [cfe] unspecified
}