/* | |
* 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. | |
* @compile-error | |
* @author iefremov | |
*/ | |
class A { | |
const A(); | |
} | |
final a = const A(); | |
const m = (a == 1); | |
main() { | |
try { | |
print(m); | |
} catch (x) {} | |
} |