| // 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 type T is more specific than a type S, written T << S, if one |
| /// of the following conditions is met: |
| /// • T is S. |
| /// • T is ⊥ |
| /// • S is dynamic. |
| /// • S is a direct supertype of T. |
| /// • T is a type parameter and S is the upper bound of T. |
| /// • T is a type parameter and S is Object. |
| /// • T is of the form I<T1, ..., Tn > and S is of the form I <S1, ..., Sn> |
| /// and Ti << Si 1 <= i <= n. |
| /// • T and S are both function types, and T << S under the rules of section |
| /// (Types/Function Types). |
| /// • T is a function type and S is Function. |
| /// • T << U and U << S. |
| /// << is a partial order on types. T is a subtype of S, written T <: S, iff |
| /// [⊥/Dynamic]T << S. |
| /// . . . |
| /// An interface type T may be assigned to a type S, written T <=> S, if either |
| /// T <: S or S <: T. |
| /// @description Checks that if T and S are both function types and T << S then |
| /// the interface type T << the interface type S. |
| /// @static-clean |
| /// @author ilya |
| |
| import "../../../Utils/expect.dart"; |
| |
| typedef void F1(int i, String s, [int p]); |
| typedef void F2(int i, String s, {int n}); |
| |
| class Whatever {} |
| |
| main() { |
| void f11(int i, String s, [int p = 0]) {} |
| Expect.isTrue(f11 is F1); |
| |
| int f12 (int i, String s, [int p = 0]) => 42; |
| Expect.isTrue(f12 is F1); |
| |
| int f13 (int i, [String s = "", int p = 0]) => 42; |
| Expect.isTrue(f13 is F1); |
| |
| int f14 (int i, [String s = "", int p = 0, Whatever? w]) => 42; |
| Expect.isTrue(f14 is F1); |
| |
| //--- |
| |
| void f21(int i, String s, {int n = 42}) {} |
| Expect.isTrue(f21 is F2); |
| |
| void f22(int i, String s, {int n = 42}) {} |
| Expect.isTrue(f22 is F2); |
| |
| int f23 (int i, String s, {int n = 4, int n2 = 2}) => 42; |
| Expect.isTrue(f23 is F2); |
| |
| int f24 (int i, String s, {int n = 42, Whatever? w}) => 42; |
| Expect.isTrue(f24 is F2); |
| } |