LanguageFeatures/Set-literals/disambiguating_A03_t02.dart

// Copyright (c) 2018, 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 Let e be a setOrMapLiteral.
/// If e has a context C, and the base type of C is Cbase (that is, Cbase is C
/// with all wrapping FutureOrs removed), and Cbase is not ?, then let S be the
/// greatest closure.
/// ...
/// if S is defined and is a subtype of Map<Object, Object> and S is not a
/// subtype of Iterable<Object> then e is a map literal.
///
/// @description Checks that if s is an emptySetOrMapLiteral with no
/// typeArguments, then if S is a subtype of Map<Object, Object> and S is not a
/// subtype of Iterable<Object> then e is a map literal.
/// @author sgrekhov@unipro.ru

import "dart:async";
import "../../Utils/expect.dart";

dynamic test() => {};
Map<int, String> test2() => {};
Map<Object, Object> test3() => {};
FutureOr<Map> test4() => {};

main() {
  Expect.isTrue(test() is Map);
  Expect.isTrue(test2() is Map);
  Expect.isTrue(test3() is Map);
  Expect.isTrue(test4() is Map);
  Expect.runtimeIsType<Map>(test());
  Expect.runtimeIsType<Map>(test2());
  Expect.runtimeIsType<Map>(test3());
  Expect.runtimeIsType<Map>(test4());
}