blob: d810ab401468b0d3f854cdbacf9273ffb57b6c92 [file] [log] [blame]
// Copyright (c) 2020, 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.
/// @assertion The definitions of least and greatest closure are changed in null
/// safe libraries to substitute [Never] in positions where previously [Null
/// would have been substituted, and [Object?] in positions where previously
/// [Object] or [dynamic] would have been substituted.
/// @description Check that correct type is substituted for generic
/// [void Function<T>()] typedef.
/// @note Read more about the least and greatest closure test template:
/// $Issue 45763
/// @author
import "../../Utils/expect.dart";
typedef check = void Function<T>();
void main() {
void f(check Function<T>() g) => g();
Expect.throws(() { f(<T>() => captureTypeArgument()); });
Expect.equals(typeOf<void Function<T>()>(), capturedTypeArgument);