blob: b0a55dc8b48a41cb2534229e536342b60e5e6ba6 [file] [log] [blame]
/*
* 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. ∀i ∈ 1..n, Ti ⇐⇒ Si .
* 3. k ≥ m and yi ∈ {x1 , ..., xk }, i ∈ 1..m.
* 4. For all yi ∈ {y1 , ..., ym }, yi = xj ⇒ Tj ⇐⇒ Si.
* @description Checks that function type t1 is not a subtype of function type
* t2 if its named optional parameters are a smaller subset of t2's.
* @author rodionov
* @reviewer kaigorodov
*/
import "../../../Utils/expect.dart";
typedef t1({int x});
typedef t2({int x, int y});
typedef t3({int x, int y, int z});
main() {
Expect.isFalse(() {} is t1);
Expect.isFalse(({int x}) {} is t2);
Expect.isFalse(({var x}) {} is t2);
Expect.isFalse(({int x, int y}) {} is t3);
Expect.isFalse(({var x, var y}) {} is t3);
}