| // 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 on the LHS of an |
| // assignment. |
| |
| 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 { |
| 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(); |
| } |
| |
| 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 = e2 is equivalent to ((x) => x == null ? null : x.v = e2)(e1). |
| |
| |
| |
| // C?.v = e2 is equivalent to C.v = e2. |
| |
| |
| |
| // The static type of e1?.v = e2 is the static type of e2. |
| |
| |
| |
| { h.D.staticE = new h.E(); h.G g = new h.G(); h.F f = (h.D?.staticE = g); Expect.identical(f, g); } |
| |
| |
| |
| // Exactly the same errors that would be caused by e1.v = e2 are |
| // also generated in the case of e1?.v = e2. |
| |
| |
| |
| // e1?.v op= e2 is equivalent to ((x) => x?.v = x.v op e2)(e1). |
| |
| |
| |
| // C?.v op= e2 is equivalent to C.v op= e2. |
| |
| |
| // The static type of e1?.v op= e2 is the static type of e1.v op e2. |
| |
| |
| |
| |
| // Let T be the static type of e1 and let y be a fresh variable of type T. |
| // Exactly the same errors that would be caused by y.v op e2 are |
| // also generated in the case of e1?.v op= e2. |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| // '?.' cannot be used to assign to toplevel properties in libraries imported |
| // via prefix. |
| |
| |
| |
| } |