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Change-Id: I582fa00eb713282c3bd6fc1607efc0242ce9076f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/146686 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Erik Ernst <eernst@google.com>
31 lines
949 B
Dart
31 lines
949 B
Dart
// Copyright (c) 2017, 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 "package:expect/expect.dart";
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T f<T>(T x) => x;
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void test(T Function<T>(T) f) {
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int Function(int) intFunc = f.call;
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dynamic intFuncDynamic = intFunc;
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Expect.isTrue(intFuncDynamic is int Function(int));
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Expect.isFalse(intFuncDynamic is String Function(String));
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Expect.equals(intFuncDynamic(1), 1);
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Expect.throwsTypeError(() {
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intFuncDynamic('oops');
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});
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String Function(String) stringFunc = f.call;
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dynamic stringFuncDynamic = stringFunc;
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Expect.isTrue(stringFuncDynamic is String Function(String));
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Expect.isFalse(stringFuncDynamic is int Function(int));
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Expect.equals(stringFuncDynamic('hello'), 'hello');
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Expect.throwsTypeError(() {
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stringFuncDynamic(1);
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});
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}
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main() {
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test(f);
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}
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