LibTest/core/Function/Function_class_A01_t01.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 A function value, or an instance of a class with a "call" method, 
 * is a subtype of a function type, and as such, a subtype of Function.
 * @description Checks that function values are indeed subtypes of the
 * [Function] class.
 * @author rodionov
 */
import "../../../Utils/expect.dart";

int foo(String s) {
  return 21;
}

int foo1() => 1;

main() {
  Expect.isTrue(foo is Function);
  Expect.isTrue(foo1 is Function);
  Expect.isTrue((int, double) { return 1; } is Function);
  Expect.isTrue((()  => 1) is Function);
}