| // Copyright (c) 2020, 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 An external variable declaration D is treated as an external |
| /// getter declaration and possibly an external setter declaration. The setter is |
| /// included if and only if D is non-final. The return type of the getter and the |
| /// parameter type of the setter, if present, is the type of D (which may be |
| /// declared explicitly, obtained by override inference, or defaulted to dynamic). |
| /// The parameter of the setter, if present, has the modifier covariant if and |
| /// only if D has the modifier covariant (the grammar only allows this modifier |
| /// on external instance variables). |
| /// |
| /// @description Checks that declaration |
| /// class A { |
| /// external covariant int i1; |
| /// external covariant var i2; |
| /// desugared as |
| /// class A { |
| /// external int get i1; |
| /// external void set i1(covariant int _); |
| /// external int get i2; |
| /// external void set i2(covariant int _); |
| /// @author sgrekhov@unipro.ru |
| |
| class A { |
| external covariant num i1; |
| external covariant var i2; |
| } |
| |
| class C1 extends A { |
| int i1 = 0; |
| String i2 = ""; |
| |
| test() { |
| int j = i1; |
| i1 = 42; |
| String s = i2; |
| i2 = "Lily was here"; |
| } |
| } |
| |
| class C2 extends A { |
| int get i1 => 0; |
| void set i1(int v) {} |
| String get i2 => ""; |
| void set i2(String v) {} |
| |
| test() { |
| int j = i1; |
| i1 = 42; |
| String s = i2; |
| i2 = "Lily was here"; |
| } |
| } |
| |
| main() { |
| new C1().test(); |
| new C2().test(); |
| } |