blob: 1ada0b2eff04008dded1186eed398d8779274c97 [file] [log] [blame]
// Copyright (c) 2016, 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 ListMixin<E> abstract class
/// Implements List<E>
/// Base implementation of a List class.
/// ListMixin can be used as a mixin to make a class implement the List interface.
/// This implements all read operations using only the length and operator[]
/// members. It implements write operations using those and length= and
/// operator[]=
/// @description Implementation of operator[]= and length=
/// @author
library list_mixin_lib;
import "dart:collection";
class MyList<E> extends Object with ListMixin<E> {
List<E> _list;
MyList.empty(): _list = new List<E>.empty(growable: true);
MyList(int length, E fill): _list = new List<E>.filled(length, fill);
E operator [](int index) => _list[index];
void operator []=(int index, E value) {
_list[index] = value;
int get length => _list.length;
void set length(int newLength) {
_list.length = newLength;
List<E> create<E>([int? length, E? fill]) {
if (length == null) {
return new MyList<E>.empty();
if (fill != null) {
return new MyList(length, fill);
throw new Exception("List length specified but fill is null");