| /* |
| * 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 it is a compile error if extension declares members |
| * with the same name as a member declared by Object (==, hashCode , toString, |
| * runtimeType or noSuchMethod) |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=extension-methods |
| |
| extension ExtendedList<T> on List<T> { |
| dynamic noSuchMethod (Invocation invocation) => null; //# 01: compile-time error |
| bool operator == (dynamic other) => true; //# 02: compile-time error |
| int get hashCode => 42; //# 03: compile-time error |
| Type get runtimeType => this.runtimeType; //# 04: compile-time error |
| String toString() => "Run, Forrest, run"; //# 05: compile-time error |
| } |
| |
| main() { |
| List<String> list = ["Lily", "was", "here"]; |
| } |
