LanguageFeatures/nnbd/implicit_conversions_A02_t02.dart

// 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 implicit tear-off conversion which converts uses of instances
/// of classes with call methods to the tear-off of their .call method when the
/// context type is a function type is performed when the context type is a
/// function type, or the nullable version of a context type.
///
/// @description Check that the implicit tear-off conversion which converts uses
/// of instances of classes with call methods to the tear-off of their .call
/// method when the context type is a function type is performed when the context
/// type is a nullable version of a context type
/// @author sgrekhov@unipro.ru

// Requirements=nnbd-strong
import "../../Utils/expect.dart";

typedef int Foo();

class C {
  int call() => 42;
}

main() {
  C c = new C();
  Function? f = c;
  if (f !=  null) {
    Expect.equals(42, f());
  }
  test(c);
}

test(Foo? f) {
  if (f != null) {
    Expect.equals(42, f());
  }
}