Language/Expressions/Shift/syntax_t15.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.

// @dart = 2.9

/// @assertion Shift expressions invoke the shift operators on objects.
/// shiftExpression:
///   additiveExpression (shiftOperator additiveExpression)* |
///   super (shiftOperator additiveExpression)+
/// ;
/// shiftOperator:
///   '<<' |
///   '>>' |
///   '>>>'
/// ;
/// A shift expression is either an additive expression, or an invocation
/// of a shift operator on either super or an expression e1, with argument e2.
/// @description Checks that it is permitted to chain as many shift expressions
/// as one likes.
/// @author rodionov

import "../../../Utils/expect.dart";
class A {
  operator <<(other) => other;
  operator >>(other) => other;
}

class B extends A {
  void test() {
    super >> 1 << 1 << -1000 << 100 >> 124 << 10;
  }
}

main() {
  Expect.throws(() {
    1 >> 1 << 1 >> -12 << -1000 << 100 >> 124 >> 3;
    new B().test();
  });
}