blob: d7dcc1115d464f12e499d8eecfe7fb9332ecdf82 [file] [log] [blame]
// Copyright (c) 2021, 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.
import 'package:expect/expect.dart';
// Tests to ensure that narrowing type information does not discard late
// sentinel values unintentionally.
class Foo<T> {
// Since `List<T>` contains a free type variable, any access of [x] will be
// immediately followed by a narrowing to the appropriate instantiation of
// `List<T>`. This narrowing should not exclude the late sentinel value from
// the abstract value.
late final List<T> x;
void main() {
Foo<int> foo = Foo();
Expect.throws(() => foo.x);
foo.x = const [];