tests/language/function/type_alias2_test.dart

// Copyright (c) 2011, 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.
// VMOptions=--enable_type_checks

// Dart test for function type alias with optional parameters.
import "package:expect/expect.dart";

typedef int f1<T>([int? a, int? b, T? c]);
typedef int f2<T>([int? a, int? b, T? d]);
typedef int f3<T>({int? a, int? b, T? c});
typedef int f4<T>({int? a, int? b, T? d});

class A<T> {
  int baz([int? a, int? b, T? c]) => -1;
  int bar({int? a, int? b, T? c}) => -1;
}

int baz([int? a, int? b, int? c]) => -1;

int bar({int? a, int? b, int? c}) => -1;

main() {
  Expect.isFalse(baz is f1);
  Expect.isFalse(baz is f3);
  Expect.isFalse(bar is f1);
  Expect.isFalse(bar is f3);
  Expect.isFalse(baz is f1);
  Expect.isTrue(baz is f1<int>);
  Expect.isTrue(bar is f3<int>);
  Expect.isFalse(baz is f1<double>);
  Expect.isFalse(bar is f3<double>);
  Expect.isFalse(baz is f2);
  Expect.isFalse(bar is f4);
  Expect.isTrue(baz is f2<int>);
  Expect.isFalse(bar is f2<int>);

  A<int> a = new A<int>();
  Expect.isTrue(a.baz is f1);
  Expect.isFalse(a.baz is f3);
  Expect.isFalse(a.bar is f1);
  Expect.isTrue(a.bar is f3);
  Expect.isTrue(a.baz is f1);
  Expect.isTrue(a.baz is f1<Object>);
  Expect.isTrue(a.bar is f3<Object>);
  Expect.isTrue(a.baz is f1<int>);
  Expect.isTrue(a.bar is f3<int>);
  Expect.isTrue(a.baz is f1<double>);
  Expect.isTrue(a.bar is f3<double>);
  Expect.isTrue(a.baz is f2);
  Expect.isFalse(a.bar is f4);
  Expect.isTrue(a.baz is f2<Object>);
  Expect.isFalse(a.bar is f2<Object>);
}