/*
 * 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 type (T1,...Tk,[Tk+1,...,Tn+m]) -> 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 <=> S.
 * 2. ∀i ∈ 1..n, Ti ⇐⇒ Si.
 * @description Checks that this statement is true for functions with several
 * positional optional parameters (class, generic, function, Dynamic).
 * @author iefremov
 */
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.isFalse(([D? a, B? b, C? c, A? d]) {} is classesFunc);
  Expect.isTrue(([A? a, A? b, A? c, A? d]) {} is classesFunc);
  Expect.isFalse(([D? a, A1? b, A1? c, A1? d]) {} is classesFunc);
  Expect.isFalse(([D? a, A2? b, A2? c, A2? d]) {} is classesFunc);
  Expect.isFalse(([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.isFalse(([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.isFalse(([A? x, G? y, mixFunc? z, var v]) {} is dynamicFunc);
  Expect.isFalse(([int? x, bool? y, List<Map>? z, classesFunc? v]) {} is dynamicFunc);

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