Language/15_Types/5_Function_Types_A03_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 The function type (T1, ... Tn, {Tx1 x1, ..., Txk xk}) -> T is a subtype of the function
 * type (S1, ..., Sn, {Sy1 y1, ..., Sym ym }) -> S, if all of the following conditions are met:
 * 1. Either S is void, or T <=> S.
 * 2. For all i 1 <= i <= n, Ti <=> Si.
 * 3. k >= m and yi belongs to {x1, ..., xk} for each i in 1..m.
 * 4. For all y in {y1, ..., ym}, yi = xj  =>  Tj <=> Si
 * @description Checks that this statement is true for functions with a single named optional parameter 
 * (class, generic, function, dynamic).
 * @author rodionov
 * @reviewer kaigorodov
 */
import "../../Utils/expect.dart";

class A {}
class B implements A {}
class C implements B {}
class D implements C {}

typedef t1({B a});
typedef t2({C c});
typedef t3({int i});
typedef t4({var v});
typedef t5({Map m});
typedef t6({Map<int, num> m});
typedef t7({t1 f});
typedef t8({Object a});

typedef okWithT1_1({A a});
typedef okWithT1_2({B a});
typedef okWithT1_3({C a});
typedef okWithT1_4({D a});

main() {
  Expect.isTrue(({A a}) {} is t1);
  Expect.isTrue(({B a}) {} is t1);
  Expect.isTrue(({C a}) {} is t1);
  Expect.isTrue(({D a}) {} is t1);
  Expect.isTrue(({Object a}) {} is t1);
  Expect.isTrue(({var a}) {} is t1);

  Expect.isTrue(({A c}) {} is t2);
  Expect.isTrue(({B c}) {} is t2);
  Expect.isTrue(({C c}) {} is t2);
  Expect.isTrue(({D c}) {} is t2);
  Expect.isTrue(({Object c}) {} is t2);
  Expect.isTrue(({var c}) {} is t2);

  Expect.isTrue(({num i}) {} is t3);
  Expect.isTrue(({int i}) {} is t3);
  Expect.isTrue(({Object i}) {} is t3);
  Expect.isTrue(({var i}) {} is t3);

  Expect.isTrue(({A v}) {} is t4);
  Expect.isTrue(({B v}) {} is t4);
  Expect.isTrue(({C v}) {} is t4);
  Expect.isTrue(({D v}) {} is t4);
  Expect.isTrue(({Object v}) {} is t4);
  Expect.isTrue(({var v}) {} is t4);
  Expect.isTrue(({num v}) {} is t4);
  Expect.isTrue(({int v}) {} is t4);
  Expect.isTrue(({Map v}) {} is t4);
  Expect.isTrue(({Map<List<Map<List, List<int>>>, List> v}) {} is t4);
  Expect.isTrue(({List v}) {} is t4);
  Expect.isTrue(({t8 v}) {} is t4);
  Expect.isTrue(({t7 v}) {} is t4);

  Expect.isTrue(({Map m}) {} is t5);
  Expect.isTrue(({Map<List, t8> m}) {} is t5);
  Expect.isTrue(({Object m}) {} is t5);
  Expect.isTrue(({var m}) {} is t5);
  Expect.isTrue(({Map<List, List> m}) {} is t5);
  Expect.isTrue(({Map<int, t8> m}) {} is t5);

  Expect.isTrue(({Map<num, num> m}) {} is t6);
  Expect.isTrue(({Map<int, int> m}) {} is t6);
  Expect.isTrue(({Map m}) {} is t6);
  Expect.isTrue(({Object m}) {} is t6);
  Expect.isTrue(({var m}) {} is t6);

  Expect.isTrue(({okWithT1_1 f}) {} is t7);
  Expect.isTrue(({okWithT1_2 f}) {} is t7);
  Expect.isTrue(({okWithT1_3 f}) {} is t7);
  Expect.isTrue(({okWithT1_4 f}) {} is t7);

  Expect.isTrue(({A a}) {} is t8);
  Expect.isTrue(({B a}) {} is t8);
  Expect.isTrue(({C a}) {} is t8);
  Expect.isTrue(({D a}) {} is t8);
  Expect.isTrue(({Object a}) {} is t8);
  Expect.isTrue(({var a}) {} is t8);
  Expect.isTrue(({num a}) {} is t8);
  Expect.isTrue(({int a}) {} is t8);
  Expect.isTrue(({Map a}) {} is t8);
  Expect.isTrue(({Map<List<Map<List, List<int>>>, List> a}) {} is t8);
  Expect.isTrue(({List a}) {} is t8);
}