| // TODO(multitest): This was automatically migrated from a multitest and may |
| // contain strange or dead code. |
| |
| // Copyright (c) 2015, 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. |
| |
| // Verify semantics of the ?. operator when it appears in a postincrement or |
| // preincrement expression (or a postdecrement or predecrement expression). |
| |
| import "package:expect/expect.dart"; |
| import "conditional_access_helper.dart" as h; |
| |
| class C { |
| int v; |
| C(this.v); |
| static int staticInt; |
| } |
| |
| class D { |
| E v; |
| D(this.v); |
| static E staticE; |
| } |
| |
| class E { |
| G operator +(int i) => new I(); |
| G operator -(int i) => new I(); |
| } |
| |
| class F {} |
| |
| class G extends E implements F {} |
| |
| class H {} |
| |
| class I extends G implements H {} |
| |
| C nullC() => null; |
| |
| main() { |
| // Make sure the "none" test fails if assignment to "?." is not implemented. |
| // This makes status files easier to maintain. |
| nullC()?.v = 1; |
| |
| // e1?.v++ is equivalent to ((x) => x == null ? null : x.v++)(e1). |
| |
| |
| |
| // C?.v++ is equivalent to C.v++. |
| |
| |
| |
| // The static type of e1?.v++ is the same as the static type of e1.v. |
| |
| |
| |
| |
| |
| |
| |
| // e1?.v-- is equivalent to ((x) => x == null ? null : x.v--)(e1). |
| |
| |
| |
| // C?.v-- is equivalent to C.v--. |
| |
| |
| |
| // The static type of e1?.v-- is the same as the static type of e1.v. |
| { E e1 = new E(); D d = new D(e1); E e2 = d?.v--; Expect.identical(e1, e2); } |
| |
| |
| |
| |
| |
| |
| // ++e1?.v is equivalent to e1?.v += 1. |
| |
| |
| |
| // ++C?.v is equivalent to C?.v += 1. |
| |
| |
| |
| // The static type of ++e1?.v is the same as the static type of e1.v + 1. |
| |
| |
| |
| |
| |
| |
| |
| // --e1?.v is equivalent to e1?.v -= 1. |
| |
| |
| |
| // --C?.v is equivalent to C?.v -= 1. |
| |
| |
| |
| // The static type of --e1?.v is the same as the static type of e1.v - 1. |
| |
| |
| |
| |
| |
| |
| } |