Dmitry Stefantsov
47fbe76d03
Change-Id: Id45696a38b281b1b75a9a0e26d89216388a4ec19 Reviewed-on: https://dart-review.googlesource.com/39942 Commit-Queue: Dmitry Stefantsov <dmitryas@google.com> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
31 lines
951 B
Dart
31 lines
951 B
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// part of "core_patch.dart";
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@patch
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class Map<K, V> {
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// Factory constructing a Map from a parser generated Map literal.
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// [elements] contains n key-value pairs.
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// The keys are at position 2*n and are already type checked by the parser
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// in checked mode.
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// The values are at position 2*n+1 and are not yet type checked.
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factory Map._fromLiteral(List elements) {
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var map = new LinkedHashMap<K, V>();
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var len = elements.length;
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for (int i = 1; i < len; i += 2) {
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map[elements[i - 1]] = elements[i];
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}
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return map;
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}
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@patch
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factory Map.unmodifiable(Map other) {
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return new UnmodifiableMapView<K, V>(new Map.from(other));
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}
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@patch
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factory Map() => new LinkedHashMap<K, V>();
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}
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