Language/Expressions/Assignable_Expressions/syntax_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 Assignable expressions are expressions that can appear on the
 * left hand side of an assignment.
 * assignableExpression:
 *   primary (arguments* assignableSelector)+ |
 *   super unconditionalAssignableSelector |
 *   identifier
 * ;
 * unconditionalAssignableSelector:
 *   '[' expression ']' |
 *   '.' identifier
 * ;
 * assignableSelector:
 *   unconditionalAssignableSelector |
 *   '?.' identifier
 * ;
 * An assignable expression is either:
 * • An identifier.
 * • An invocation (possibly conditional) of a getter or list access operator
 *   on an expression e.
 * • An invocation of a getter or list access operator on super.
 * @description Checks that super with an unconditionalAssignableSelector
 * can be used in the left hand side of an assignment.
 * @author msyabro
 */

class S {
  operator [](var index) {}
  operator []=(var index, var value) {}
  var prop;
}
class A extends S {
  test() {
    super["key"] = null;
    super.prop = null;
  }
}

main() {
  A a = new A();
  a.test();
}