| /* |
| * Copyright (c) 2019, 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 extension declaration is a top-level declaration with a grammar |
| * similar to: |
| * <extension> ::= |
| * `extension' <identifier>? <typeParameters>? `on' <type> `?'? `{' |
| * memberDeclaration* |
| * `}' |
| * ... |
| * The member declarations can be any non-abstract static or instance member |
| * declaration except for instance variables and constructors, and they cannot |
| * have the same name as a member declared by Object (==, hashCode , toString, |
| * runtimeType or noSuchMethod) |
| * |
| * @description Check that the member declarations can be any non-abstract |
| * static or instance member |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=extension-methods |
| import "../../Utils/expect.dart"; |
| |
| extension ExtendedList<T> on List<T> { |
| int get getter => this.length * 2; |
| List<T> operator-() => this.reversed.toList(); |
| List<List<T>> split(int at) => <List<T>>[this.sublist(0, at), this.sublist(at)]; |
| void set setter(int v) {this.length = v;} |
| |
| static String get staticGetter => "List"; |
| static void set staticSetter(String v) {staticVar = v;}; |
| static String staticMethod(String s) => s; |
| static String staticVar = "Run, Forrest, run"; |
| static const staticConst = "Nothing is constant, everything is changing"; |
| } |
| |
| main() { |
| List<String> list = ["Lily", "was", "here"]; |
| |
| Expect.equals(6, list.getter); |
| Expect.listEquals([["Lily"], ["was", "here"]], list.split(1)); |
| Expect.listEquals(["here", "was", "Lily"], -list.split); |
| list.setter = 13; |
| Expect.equals(13, list.length); |
| |
| Expect.listEquals(["List"], ExtendedList.staticGetter); |
| Expect.listEquals(["Lily was here"], ExtendedList.staticMethod("Lily was here")); |
| Expect.equals("Run, Forrest, run", ExtendedList.staticVar); |
| ExtendedList.staticSetter = "Lily was here"; |
| Expect.equals("Lily was here", ExtendedList.staticVar); |
| Expect.equals("Nothing is constant, everything is changing", ExtendedList.staticConst); |
| } |