blob: 94f29f195fc3404ab3a461577fd72bd8a3ee030e [file] [log] [blame]
// Copyright (c) 2012, 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.
// The _GrowableArrayMarker class is used to signal to the List() factory
// whether a parameter was passed.
class _GrowableArrayMarker implements int {
const _GrowableArrayMarker();
}
const _GROWABLE_ARRAY_MARKER = const _GrowableArrayMarker();
patch class List<E> {
/* patch */ factory List([int length = _GROWABLE_ARRAY_MARKER]) {
if (identical(length, _GROWABLE_ARRAY_MARKER)) {
return new _GrowableList<E>(0);
}
// All error handling on the length parameter is done at the implementation
// of new _List.
return new _List<E>(length);
}
/* patch */ factory List.filled(int length, E fill, {bool growable: false}) {
// All error handling on the length parameter is done at the implementation
// of new _List.
var result = growable ? new _GrowableList<E>(length) : new _List<E>(length);
if (fill != null) {
for (int i = 0; i < length; i++) {
result[i] = fill;
}
}
return result;
}
/* patch */ factory List.from(Iterable elements, { bool growable: true }) {
if (elements is EfficientLength) {
int length = elements.length;
var list = growable ? new _GrowableList<E>(length) : new _List<E>(length);
if (length > 0) { // Avoid creating iterator unless necessary.
int i = 0;
for (var element in elements) { list[i++] = element; }
}
return list;
}
List<E> list = new _GrowableList<E>(0);
for (E e in elements) {
list.add(e);
}
if (growable) return list;
if (list.length == 0) {
// Avoid getting an immutable list from makeListFixedLength.
return new _List<E>(0);
}
return makeListFixedLength(list);
}
/* patch */ factory List.unmodifiable(Iterable elements) {
List result = new List<E>.from(elements, growable: false);
return makeFixedListUnmodifiable(result);
}
// Factory constructing a mutable List from a parser generated List literal.
// [elements] contains elements that are already type checked.
factory List._fromLiteral(List elements) {
if (elements.isEmpty) {
return new _GrowableList<E>(0);
}
var result = new _GrowableList<E>.withData(elements);
result._setLength(elements.length);
return result;
}
}