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Side by Side Diff: sdk/lib/convert/codec.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 /** 7 /**
8 * A [Codec] encodes and (if supported) decodes data. 8 * A [Codec] encodes and (if supported) decodes data.
9 * 9 *
10 * Codecs can be fused. For example fusing [JSON] and [UTF8] produces 10 * Codecs can be fused. For example fusing [JSON] and [UTF8] produces
(...skipping 42 matching lines...) Expand 10 before | Expand all | Expand 10 after
53 * var decoded = JSON_TO_BYTES.decode(bytes); 53 * var decoded = JSON_TO_BYTES.decode(bytes);
54 * assert(decoded is List && decoded[0] == "json-object"); 54 * assert(decoded is List && decoded[0] == "json-object");
55 * 55 *
56 * var inverted = JSON.inverted; 56 * var inverted = JSON.inverted;
57 * var jsonIdentity = JSON.fuse(inverted); 57 * var jsonIdentity = JSON.fuse(inverted);
58 * var jsonObject = jsonIdentity.encode(["1", 2]); 58 * var jsonObject = jsonIdentity.encode(["1", 2]);
59 * assert(jsonObject is List && jsonObject[0] == "1" && jsonObject[1] == 2 ); 59 * assert(jsonObject is List && jsonObject[0] == "1" && jsonObject[1] == 2 );
60 */ 60 */
61 // TODO(floitsch): use better example with line-splitter once that one is 61 // TODO(floitsch): use better example with line-splitter once that one is
62 // in this library. 62 // in this library.
63 Codec<S, dynamic/*=R*/> fuse/*<R>*/(Codec<T, dynamic/*=R*/> other) { 63 Codec<S, R> fuse<R>(Codec<T, R> other) {
64 return new _FusedCodec<S, T, dynamic/*=R*/>(this, other); 64 return new _FusedCodec<S, T, R>(this, other);
65 } 65 }
66 66
67 /** 67 /**
68 * Inverts `this`. 68 * Inverts `this`.
69 * 69 *
70 * The [encoder] and [decoder] of the resulting codec are swapped. 70 * The [encoder] and [decoder] of the resulting codec are swapped.
71 */ 71 */
72 Codec<T, S> get inverted => new _InvertedCodec<T, S>(this); 72 Codec<T, S> get inverted => new _InvertedCodec<T, S>(this);
73 } 73 }
74 74
75 /** 75 /**
76 * Fuses the given codecs. 76 * Fuses the given codecs.
77 * 77 *
78 * In the non-chunked conversion simply invokes the non-chunked conversions in 78 * In the non-chunked conversion simply invokes the non-chunked conversions in
79 * sequence. 79 * sequence.
80 */ 80 */
81 class _FusedCodec<S, M, T> extends Codec<S, T> { 81 class _FusedCodec<S, M, T> extends Codec<S, T> {
82 final Codec<S, M> _first; 82 final Codec<S, M> _first;
83 final Codec<M, T> _second; 83 final Codec<M, T> _second;
84 84
85 Converter<S, T> get encoder => _first.encoder.fuse/*<T>*/(_second.encoder); 85 Converter<S, T> get encoder => _first.encoder.fuse<T>(_second.encoder);
86 Converter<T, S> get decoder => _second.decoder.fuse/*<S>*/(_first.decoder); 86 Converter<T, S> get decoder => _second.decoder.fuse<S>(_first.decoder);
87 87
88 _FusedCodec(this._first, this._second); 88 _FusedCodec(this._first, this._second);
89 } 89 }
90 90
91 class _InvertedCodec<T, S> extends Codec<T, S> { 91 class _InvertedCodec<T, S> extends Codec<T, S> {
92 final Codec<S, T> _codec; 92 final Codec<S, T> _codec;
93 93
94 _InvertedCodec(Codec<S, T> codec) : _codec = codec; 94 _InvertedCodec(Codec<S, T> codec) : _codec = codec;
95 95
96 Converter<T, S> get encoder => _codec.decoder; 96 Converter<T, S> get encoder => _codec.decoder;
97 Converter<S, T> get decoder => _codec.encoder; 97 Converter<S, T> get decoder => _codec.encoder;
98 98
99 Codec<S, T> get inverted => _codec; 99 Codec<S, T> get inverted => _codec;
100 } 100 }
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