/*
 * Copyright (c) 2019, 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 From the Unified collections Spec:
 * We require that at least one component unambiguously determine the literal
 * form, otherwise it is a compile-time error. So, given:
 *    dynamic x = <int, int>{};
 *    Iterable l = [];
 *    Map m = {};
 *    Then:
 *    {...x}       // Static error, because it is ambiguous.
 *    {...x, ...l} // Statically a set, runtime error when spreading x.
 *    {...x, ...m} // Statically a map, no runtime error.
 *    {...l, ...m} // Static error, because it must be both a set and a map.
 * @description Checks that {...l, ...m} is a static error
 * @author iarkh@unipro.ru
 */
// SharedOptions=--enable-experiment=constant-update-2018

main() {
  Iterable l = [];
  Map m = {};
  var res1   = {...l, ...m};  //# 01: compile-time error
  var res2   = {...m, ...l};  //# 02: compile-time error
  List res3  = {...l, ...m};  //# 03: compile-time error
  Map res4   = {...l, ...m};  //# 04: compile-time error
}