Language/15_Types/5_Function_Types_A02_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, ..., Tk, [Tk+1, ..., Tn+k]) -> T is a subtype of the function
 * type (S1, ..., Sk+j, [Sk+j+1, ..., Sn] -> S, if all of the following conditions are met:
 * 1. Either S is void or T is assignable to S.
 * 2. Ti <=> Si for i in 1 to n.
 * @description Checks that this statement is true for functions with a single positional optional parameter 
 * (class, generic, function, Dynamic).
 * @author iefremov
 * @reviewer rodionov
 * @reviewer iefremov
 */
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);
}