blob: 4827e54b719c284820038261806c09a243a30acb [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.
// Tests lookup of type literals of user-defined classes in const maps.
// @dart = 2.9
import 'package:expect/expect.dart';
class A {}
class C<T> {}
typedef F = T Function<T>();
const aType = A;
const fType = F;
main() {
final map = const {A: 42, F: 2, 'asdf': 'fdsa'};
Expect.equals(42, map[getValueNonOptimized(A)]);
Expect.equals(42, map[getValueNonOptimized(aType)]);
Expect.equals(2, map[getValueNonOptimized(F)]);
Expect.equals(2, map[getValueNonOptimized(fType)]);
Expect.isTrue(map.containsKey(getValueNonOptimized(A)));
Expect.isTrue(map.containsKey(getValueNonOptimized(aType)));
Expect.isTrue(map.containsKey(getValueNonOptimized(F)));
Expect.isTrue(map.containsKey(getValueNonOptimized(fType)));
}
/// Returns its argument.
///
/// Prevents static optimizations and inlining.
@pragma('vm:never-inline')
@pragma('dart2js:noInline')
dynamic getValueNonOptimized(dynamic x) {
// DateTime.now() cannot be predicted statically, never equal to 42.
if (DateTime.now().millisecondsSinceEpoch == 42) {
return getValueNonOptimized(2);
}
return x;
}