Language/Types/Type_Aliases/dynamic_param_type_t02.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.
 */
/**
 * @assertion Likewise, if a type annotation is omitted on a formal parameter
 * in typedef declaration, it is taken to be dynamic.
 * @description Checks that function types with various types of formal
 * optional parameter and named parameter are subtypes of given type t1 whose
 * declaration omits parameter types, therefore the type of formal parameter
 * of t1 should be dynamic.
 * @static-clean
 * @author iefremov, sgrekhov@unipro.ru
 */
import '../../../Utils/expect.dart';

typedef F1([x]);
typedef F2({x});

typedef Func();
typedef int Func2(int x);

main() {
  Expect.isTrue(([x]) {} is F1);
  Expect.isTrue(([dynamic x]) {} is F1);
  Expect.isFalse(([int x]) {} is F1);
  Expect.isTrue(([Object x]) {} is F1);
  Expect.isFalse(([Func x]) {} is F1);
  Expect.isFalse(([Func2 x]) {} is F1);

  Expect.isTrue(({x}) {} is F2);
  Expect.isTrue(({dynamic x}) {} is F2);
  Expect.isFalse(({int x}) {} is F2);
  Expect.isTrue(({Object x}) {} is F2);
  Expect.isFalse(({Func x}) {} is F2);
  Expect.isFalse(({Func2 x}) {} is F2);
}