LanguageFeatures/Spread-collections/StaticSemantic_A07_t01.dart

// 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.

// @dart = 2.9

/// @assertion It is a static error if:
///    If a map spread element's static type implements [Map<K, V>] for some [K]
///    and [V] and [K] is not assignable to the key type of the map or [V] is not
///    assignable to the value type of the map.
/// @description Checks that compile error is thrown if spread element type in
/// map literal is not assignable to the type of the map.
/// @author iarkh@unipro.ru


main() {

  Map m1 = <Object, Object> {};
  Map<int, String> m2 = <int, String>{};
  Map m3 = <Object, Object> {1: "1", 2: "2"};
  Map<int, String> m4 = <int, String>{1: "11"};

  Map map1 = <int, String>{...m1};
  Map map2 = <int, String>{...m2};
  Map map3 = <int, String>{...m3};
  Map map4 = <int, String>{...m4};

  Map map5 = <int, String>{...?m1};
  Map map6 = <int, String>{...?m2};
  Map map7 = <int, String>{...?m3};
  Map map8 = <int, String>{...?m4};
}