Vijay Menon
67e4bc583a
This breaks out casts / coercions into: Standard (on by default) - DynamicCasts: dynamic -> T - AssignmentCasts: T x = expr; // T must be a ground type Inference (this will go away) - InferableLiteral - InferableClosure - InferableAllocation Implicit (no flag yet, but i'll add to disable by default) - DownCastComposite: Any cast to a non-ground type - DownCastImplicit: Any other implicit downcast not covered above A flag is also added to enable/disable all wrapping. This is not off by default yet, but that is the intent. R=leafp@google.com Review URL: https://codereview.chromium.org/1038583004
32 lines
1.4 KiB
Dart
32 lines
1.4 KiB
Dart
part of dart.convert;
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abstract class Codec<S, T> {const Codec();
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T encode(S input) => encoder.convert(input);
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S decode(T encoded) => decoder.convert(encoded);
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Converter<S, T> get encoder;
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Converter<T, S> get decoder;
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Codec<S, dynamic> fuse(Codec<T, dynamic> other) {
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return new _FusedCodec<S, T, dynamic>(this, other);
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}
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Codec<T, S> get inverted => new _InvertedCodec<T, S>(this);
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}
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class _FusedCodec<S, M, T> extends Codec<S, T> {final Codec<S, M> _first;
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final Codec<M, T> _second;
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Converter<S, T> get encoder => ((__x2) => DEVC$RT.cast(__x2, DEVC$RT.type((Converter<S, dynamic> _) {
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}
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), DEVC$RT.type((Converter<S, T> _) {
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}
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), "CompositeCast", """line 87, column 34 of dart:convert/codec.dart: """, __x2 is Converter<S, T>, false))(_first.encoder.fuse(_second.encoder));
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Converter<T, S> get decoder => ((__x3) => DEVC$RT.cast(__x3, DEVC$RT.type((Converter<T, dynamic> _) {
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}
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), DEVC$RT.type((Converter<T, S> _) {
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}
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), "CompositeCast", """line 88, column 34 of dart:convert/codec.dart: """, __x3 is Converter<T, S>, false))(_second.decoder.fuse(_first.decoder));
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_FusedCodec(this._first, this._second);
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}
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class _InvertedCodec<T, S> extends Codec<T, S> {final Codec<S, T> _codec;
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_InvertedCodec(Codec<S, T> codec) : _codec = codec;
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Converter<T, S> get encoder => _codec.decoder;
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Converter<S, T> get decoder => _codec.encoder;
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Codec<S, T> get inverted => _codec;
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}
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