Joshua Litt
eab26cd2bd
Change-Id: Ia1f913a01f2be006158967b145db3ee34b297cfe Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/155660 Commit-Queue: Joshua Litt <joshualitt@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>
38 lines
737 B
Dart
38 lines
737 B
Dart
// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// @dart = 2.7
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/*class: A:checkedInstance,typeArgument*/
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abstract class A {}
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/*class: B:typeArgument*/
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class B implements A {}
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/*class: C:checkedInstance,checks=[],instance,typeArgument*/
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class C<T> {}
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final Map<String, C> map = {};
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void setup() {
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map['x'] = new C<B>();
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}
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C<T> lookup<T>(String key) {
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final value = map[key];
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if (value != null && value is C<T>) {
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return value;
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}
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throw 'Invalid C value for $key: ${value}';
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}
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void lookupA() {
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lookup<A>('x');
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}
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main() {
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setup();
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lookupA();
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}
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