Language/15_Types/5_Function_Types_A03_t12.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 even if the subtype function type has more named optional
 * parameters than the supertype as long it's a superset of the supertype's named optional parameters.
 * This test is like A03/t03, but the order of named parameters is not altered.
 * @author kaigorodov
 * @reviewer rodionov
 */
import "../../Utils/expect.dart";

class A {}
class A1 {}
class A2 {}
class B implements A, A1, A2 {}
class C implements B {}
class D implements C {}

class G<T, S, U, W> {}

typedef classesFunc(A aa, {A a, B b, C c, D d});
typedef genericsFunc({Map<num, int> m, List<List<B>> l, G<A, B, C, D> g});
typedef dynamicFunc({var x, var y, var z, var v});
typedef funcFunc({classesFunc f1, genericsFunc f2, dynamicFunc f3});
typedef mixFunc({var x, B b, G<A, B, C, D> g, funcFunc f});

typedef okWithClassesFunc(A aa, {D a, D b, D c, D d});
typedef okWithGenericsFunc({Map<int, int> m, List<List<D>> l, G<D, D, D, D> g});
typedef okWithDynamicFunc({int x, bool y, List<Map> z, classesFunc v});


main() {
  Expect.isTrue((var vv, {A a, B b, C c, D d, Map xxx, Object xxxx}) {} is classesFunc);

  Expect.isTrue(({Map<num, int> m, List<List<B>> l, G<A, B, C, D> g}) {} is genericsFunc);

  Expect.isTrue(({A x, G y, mixFunc z, var v, Object xx, List<Map<int, mixFunc>> xxx,
                  mixFunc xxxx}) {} is dynamicFunc);

  Expect.isTrue(({okWithClassesFunc f1, okWithGenericsFunc f2, okWithDynamicFunc f3, mixFunc xx}) {} is funcFunc);

}