Language/12_Expressions/01_Constants_A10_t02.dart

/*
 * Copyright (c) 2011, 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  An expression of one of the forms e1 == e2 or e1 != e2 where e1 and
 * e2 are constant expressions that evaluate to a numeric, string or boolean
 * value or to null is constant expression.
 * @description Checks that an expression of the form e1 == e2 cannot be used to initialize
 * a constant variable if e1 does not evaluate to a numeric, string or boolean value.
 * @author iefremov
 * @compile-error
 * @reviewer rodionov
 */

class A {
  const A();
}

final a = const A();
const m = (a == 1);

main() {
  try {
    print(m);
  } catch(x) {}
}