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Side by Side Diff: sdk/lib/convert/line_splitter.dart

Issue 2529393002: Make core libraries use generic method syntax. (Closed)
Patch Set: Update status files. Created 3 years, 11 months ago
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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2013, 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 part of dart.convert; 5 part of dart.convert;
6 6
7 // Character constants. 7 // Character constants.
8 const int _LF = 10; 8 const int _LF = 10;
9 const int _CR = 13; 9 const int _CR = 13;
10 10
11 /** 11 /**
12 * A [Converter] that splits a [String] into individual lines. 12 * A [StreamTranformer] that splits a [String] into individual lines.
13 * 13 *
14 * A line is terminated by either a CR (U+000D), a LF (U+000A), a 14 * A line is terminated by either a CR (U+000D), a LF (U+000A), a
15 * CR+LF sequence (DOS line ending), 15 * CR+LF sequence (DOS line ending),
16 * and a final non-empty line can be ended by the end of the string. 16 * and a final non-empty line can be ended by the end of the string.
17 * 17 *
18 * The returned lines do not contain the line terminators. 18 * The returned lines do not contain the line terminators.
19 */ 19 */
20
20 class LineSplitter 21 class LineSplitter
21 extends Converter<String, List<String>>/*=Object*/ 22 extends Converter<String, List<String>>/*=Object*/
22 implements ChunkedConverter<String, List<String>, String, String> 23 implements ChunkedConverter<String, List<String>, String, String>
23 /*=StreamTransformer<String, String>*/ { 24 /*=StreamTransformer<String, String>*/ {
24 25
25 const LineSplitter(); 26 const LineSplitter();
26 27
27 /// Split [lines] into individual lines. 28 /// Split [lines] into individual lines.
28 /// 29 ///
29 /// If [start] and [end] are provided, only split the contents of 30 /// If [start] and [end] are provided, only split the contents of
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76 return lines; 77 return lines;
77 } 78 }
78 79
79 StringConversionSink startChunkedConversion(Sink<String> sink) { 80 StringConversionSink startChunkedConversion(Sink<String> sink) {
80 if (sink is! StringConversionSink) { 81 if (sink is! StringConversionSink) {
81 sink = new StringConversionSink.from(sink); 82 sink = new StringConversionSink.from(sink);
82 } 83 }
83 return new _LineSplitterSink(sink); 84 return new _LineSplitterSink(sink);
84 } 85 }
85 86
86 Stream/*<String>*/ bind(Stream/*<String>*/ stream) { 87 Stream/*<String>*/ bind(Stream<String> stream) {
87 return new Stream<String>.eventTransformed( 88 return new Stream<String>.eventTransformed(
88 stream, 89 stream,
89 (EventSink<String> sink) => new _LineSplitterEventSink(sink)); 90 (EventSink<String> sink) => new _LineSplitterEventSink(sink));
90 } 91 }
91 } 92 }
92 93
93 // TODO(floitsch): deal with utf8. 94 // TODO(floitsch): deal with utf8.
94 class _LineSplitterSink extends StringConversionSinkBase { 95 class _LineSplitterSink extends StringConversionSinkBase {
95 final StringConversionSink _sink; 96 final StringConversionSink _sink;
96 97
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171 final EventSink<String> _eventSink; 172 final EventSink<String> _eventSink;
172 173
173 _LineSplitterEventSink(EventSink<String> eventSink) 174 _LineSplitterEventSink(EventSink<String> eventSink)
174 : _eventSink = eventSink, 175 : _eventSink = eventSink,
175 super(new StringConversionSink.from(eventSink)); 176 super(new StringConversionSink.from(eventSink));
176 177
177 void addError(Object o, [StackTrace stackTrace]) { 178 void addError(Object o, [StackTrace stackTrace]) {
178 _eventSink.addError(o, stackTrace); 179 _eventSink.addError(o, stackTrace);
179 } 180 }
180 } 181 }
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