LanguageFeatures/Set-literals/disambiguating_A01_t04.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 typeArguments then:
///   - If there is exactly one type argument T, then e is a set literal with
///     static type Set<T>.
///   - If there are exactly two type arguments K and V, then e is a map literal
///     with static type Map<K, V>.
///   - Otherwise (three or more type arguments), report a compile-time error.
///
/// @description Checks that if s is an emptySetOrMapLiteral and s has a
/// typeArguments with one type argument, then s is a set literal
/// @author sgrekhov@unipro.ru

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

main() {
  Expect.isTrue(<int> {} is Set);
  Expect.isTrue( const <int> {} is Set);
  Expect.runtimeIsType<Set>(<int>{});
  Expect.runtimeIsType<Set>(const <int>{});

  var x1 = const <int> {};
  Expect.isTrue(x1 is Set);
  Expect.runtimeIsType<Set>(x1);
  var x2 = <int> {};
  Expect.isTrue(x2 is Set);
  Expect.runtimeIsType<Set>(x2);
}