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Side by Side Diff: runtime/lib/array_patch.dart

Issue 2230383003: Implement @patch annotation for patch class members (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: wip Created 4 years, 4 months ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 // The _GrowableArrayMarker class is used to signal to the List() factory 5 // The _GrowableArrayMarker class is used to signal to the List() factory
6 // whether a parameter was passed. 6 // whether a parameter was passed.
7 class _GrowableArrayMarker implements int { 7 class _GrowableArrayMarker implements int {
8 const _GrowableArrayMarker(); 8 const _GrowableArrayMarker();
9 } 9 }
10 10
11 const _GROWABLE_ARRAY_MARKER = const _GrowableArrayMarker(); 11 const _GROWABLE_ARRAY_MARKER = const _GrowableArrayMarker();
12 12
13 @patch class List<E> { 13 @patch class List<E> {
14 /* @patch */ factory List([int length = _GROWABLE_ARRAY_MARKER]) { 14 @patch factory List([int length = _GROWABLE_ARRAY_MARKER]) {
15 if (identical(length, _GROWABLE_ARRAY_MARKER)) { 15 if (identical(length, _GROWABLE_ARRAY_MARKER)) {
16 return new _GrowableList<E>(0); 16 return new _GrowableList<E>(0);
17 } 17 }
18 // All error handling on the length parameter is done at the implementation 18 // All error handling on the length parameter is done at the implementation
19 // of new _List. 19 // of new _List.
20 return new _List<E>(length); 20 return new _List<E>(length);
21 } 21 }
22 22
23 /* @patch */ factory List.filled(int length, E fill, {bool growable: false}) { 23 @patch factory List.filled(int length, E fill, {bool growable: false}) {
24 // All error handling on the length parameter is done at the implementation 24 // All error handling on the length parameter is done at the implementation
25 // of new _List. 25 // of new _List.
26 var result = growable ? new _GrowableList<E>(length) : new _List<E>(length); 26 var result = growable ? new _GrowableList<E>(length) : new _List<E>(length);
27 if (fill != null) { 27 if (fill != null) {
28 for (int i = 0; i < length; i++) { 28 for (int i = 0; i < length; i++) {
29 result[i] = fill; 29 result[i] = fill;
30 } 30 }
31 } 31 }
32 return result; 32 return result;
33 } 33 }
34 34
35 /* @patch */ factory List.from(Iterable elements, { bool growable: true }) { 35 @patch factory List.from(Iterable elements, { bool growable: true }) {
36 if (elements is EfficientLength) { 36 if (elements is EfficientLength) {
37 int length = elements.length; 37 int length = elements.length;
38 var list = growable ? new _GrowableList<E>(length) : new _List<E>(length); 38 var list = growable ? new _GrowableList<E>(length) : new _List<E>(length);
39 if (length > 0) { // Avoid creating iterator unless necessary. 39 if (length > 0) { // Avoid creating iterator unless necessary.
40 int i = 0; 40 int i = 0;
41 for (var element in elements) { list[i++] = element; } 41 for (var element in elements) { list[i++] = element; }
42 } 42 }
43 return list; 43 return list;
44 } 44 }
45 List<E> list = new _GrowableList<E>(0); 45 List<E> list = new _GrowableList<E>(0);
46 for (E e in elements) { 46 for (E e in elements) {
47 list.add(e); 47 list.add(e);
48 } 48 }
49 if (growable) return list; 49 if (growable) return list;
50 if (list.length == 0) { 50 if (list.length == 0) {
51 // Avoid getting an immutable list from makeListFixedLength. 51 // Avoid getting an immutable list from makeListFixedLength.
52 return new _List<E>(0); 52 return new _List<E>(0);
53 } 53 }
54 return makeListFixedLength(list); 54 return makeListFixedLength(list);
55 } 55 }
56 56
57 /* @patch */ factory List.unmodifiable(Iterable elements) { 57 @patch factory List.unmodifiable(Iterable elements) {
58 List result = new List<E>.from(elements, growable: false); 58 List result = new List<E>.from(elements, growable: false);
59 return makeFixedListUnmodifiable(result); 59 return makeFixedListUnmodifiable(result);
60 } 60 }
61 61
62 // Factory constructing a mutable List from a parser generated List literal. 62 // Factory constructing a mutable List from a parser generated List literal.
63 // [elements] contains elements that are already type checked. 63 // [elements] contains elements that are already type checked.
64 factory List._fromLiteral(List elements) { 64 factory List._fromLiteral(List elements) {
65 if (elements.isEmpty) { 65 if (elements.isEmpty) {
66 return new _GrowableList<E>(0); 66 return new _GrowableList<E>(0);
67 } 67 }
68 var result = new _GrowableList<E>.withData(elements); 68 var result = new _GrowableList<E>.withData(elements);
69 result._setLength(elements.length); 69 result._setLength(elements.length);
70 return result; 70 return result;
71 } 71 }
72 } 72 }
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