| // 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 does not appear on the LHS of an |
| // assignment. |
| |
| import "package:expect/expect.dart"; |
| import "conditional_access_helper.dart" as h; |
| |
| class B {} |
| |
| class C extends B { |
| int? v; |
| C(this.v); |
| static int? staticInt; |
| } |
| |
| C? nullC() => null; |
| |
| main() { |
| // Make sure the "none" test fails if property access using "?." is not |
| // implemented. This makes status files easier to maintain. |
| nullC()?.v; |
| |
| // e1?.id is equivalent to ((x) => x == null ? null : x.id)(e1). |
| |
| |
| |
| // C?.id is equivalent to C.id. |
| |
| |
| |
| // The static type of e1?.d is the static type of e1.id. |
| |
| |
| |
| |
| |
| |
| |
| // Let T be the static type of e1 and let y be a fresh variable of type T. |
| // Exactly the same static warnings that would be caused by y.id are also |
| // generated in the case of e1?.id. |
| |
| |
| |
| // '?.' cannot be used to access toplevel properties in libraries imported via |
| // prefix. |
| |
| |
| // Nor can it be used to access the hashCode getter on the class Type. |
| |
| |
| } |