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8de8a1c226
They are all errors now. Change-Id: If48d38e38e845fd5b5a950dd5514bf1cbbce03d8 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/155880 Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
37 lines
1.1 KiB
Dart
37 lines
1.1 KiB
Dart
// Copyright (c) 2020, 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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import "dart:collection";
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import 'cast_helper.dart';
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void main() {
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testSetDowncast();
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testMapDowncast();
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}
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void testSetDowncast() {
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var setEls = new Set<C?>.from(elements);
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var dSet = Set.castFrom<C?, D?>(setEls);
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var newC = new C();
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dSet.add(newC);
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// ^^^^
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// [analyzer] COMPILE_TIME_ERROR.ARGUMENT_TYPE_NOT_ASSIGNABLE
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// [cfe] The argument type 'C' can't be assigned to the parameter type 'D?'.
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}
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void testMapDowncast() {
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var map = new Map.fromIterables(elements, elements);
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var dMap = Map.castFrom<C?, C?, D?, D?>(map);
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dMap[c] = d;
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// ^
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// [analyzer] COMPILE_TIME_ERROR.ARGUMENT_TYPE_NOT_ASSIGNABLE
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// [cfe] A value of type 'C' can't be assigned to a variable of type 'D?'.
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dMap[d] = c;
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// ^
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// [analyzer] COMPILE_TIME_ERROR.INVALID_ASSIGNMENT
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// [cfe] A value of type 'C' can't be assigned to a variable of type 'D?'.
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}
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