Language/15_Types/5_Function_Types_A03_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 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 several named optional parameters 
 * (class, generic, function, Dynamic).
 * @author rodionov
 * @reviewer kaigorodov
 */
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 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_1({A a, A1 b, A1 c, A1 d});
typedef okWithClassesFunc_2({D a, D b, D c, D d});

typedef okWithGenericsFunc_1({Map<num, num> m, List<List<A1>> l, G<A, A1, A1, A1> g});
typedef okWithGenericsFunc_2({Map<int, int> m, List<List<D>> l, G<D, D, D, D> g});

typedef okWithDynamicFunc_1({A x, G y, mixFunc z, var v});
typedef okWithDynamicFunc_2({int x, bool y, List<Map> z, classesFunc v});


main() {
  Expect.isTrue(({D a, B b, C c, A d}) {} is classesFunc);
  Expect.isTrue(({A a, A b, A c, A d}) {} is classesFunc);
  Expect.isTrue(({D a, A1 b, A1 c, A1 d}) {} is classesFunc);
  Expect.isTrue(({D a, A2 b, A2 c, A2 d}) {} is classesFunc);
  Expect.isTrue(({D a, D b, D c, D d}) {} is classesFunc);
  Expect.isTrue(({var a, var b, var c, var d}) {} is classesFunc);
  Expect.isTrue(({Object a, Object b, Object c, Object d}) {} is classesFunc);

  Expect.isTrue(({Map<num, num> m, List<List<A1>> l, G<A, A1, A1, A1> g}) {} is genericsFunc);
  Expect.isTrue(({Map<int, int> m, List<List<D>> l, G<D, D, D, D> g}) {} is genericsFunc);
  Expect.isTrue(({var m, var l, var g}) {} is genericsFunc);
  Expect.isTrue(({Object m, Object l, Object g}) {} is genericsFunc);

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

  Expect.isTrue(({okWithClassesFunc_1 f1, okWithGenericsFunc_1 f2, okWithDynamicFunc_1 f3}) {} is funcFunc);
  Expect.isTrue(({okWithClassesFunc_2 f1, okWithGenericsFunc_2 f2, okWithDynamicFunc_2 f3}) {} is funcFunc);
}