| // 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 is used to invoke a method. |
| |
| import "package:expect/expect.dart"; |
| import "conditional_access_helper.dart" as h; |
| |
| bad() { |
| Expect.fail('Should not be executed'); |
| } |
| |
| class B {} |
| |
| class C extends B { |
| f(callback()?) => callback!(); |
| int g(int callback()) => callback(); |
| static staticF(callback()) => callback(); |
| static int staticG(int callback()) => callback(); |
| } |
| |
| C? nullC() => null; |
| |
| main() { |
| // Make sure the "none" test fails if method invocation using "?." is not |
| // implemented. This makes status files easier to maintain. |
| nullC()?.f(null); |
| |
| // o?.m(...) is equivalent to ((x) => x == null ? null : x.m(...))(o). |
| |
| |
| |
| // C?.m(...) is equivalent to C.m(...). |
| |
| |
| |
| // The static type of o?.m(...) is the same as the static type of |
| // o.m(...). |
| |
| |
| |
| |
| { int? i = C?.staticG(() => 1); Expect.equals(1, i); } |
| |
| |
| |
| |
| // Let T be the static type of o and let y be a fresh variable of type T. |
| // Exactly the same static warnings that would be caused by y.m(...) are also |
| // generated in the case of o?.m(...). |
| |
| |
| |
| // '?.' can't be used to access toplevel functions in libraries imported via |
| // prefix. |
| |
| |
| // Nor can it be used to access the toString method on the class Type. |
| |
| |
| } |