Language/Expressions/Constants/equals_expression_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 A constant expression is an expression whose value can never
/// change, and that can be evaluated entirely at compile time.
/// A constant expression is one of the following:
/// . . .
/// • 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.
/// @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


class A {
  const A();
}

final a = const A();
const m = (a == 1);
//         ^
// [analyzer] unspecified
// [cfe] unspecified

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