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| 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 | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 part of dart2js.js_emitter; | |
| 6 | |
| 7 /** | |
| 8 * A data structure for collecting fragments of a class definition. | |
| 9 */ | |
| 10 class ClassBuilder { | |
| 11 final List<jsAst.Property> properties = <jsAst.Property>[]; | |
| 12 final List<jsAst.Literal> fields = <jsAst.Literal>[]; | |
| 13 | |
| 14 jsAst.Name superName; | |
| 15 jsAst.Node functionType; | |
| 16 List<jsAst.Node> fieldMetadata; | |
| 17 | |
| 18 final Element element; | |
| 19 final Namer namer; | |
| 20 final bool isForActualClass; | |
| 21 | |
| 22 ClassBuilder(this.element, this.namer, this.isForActualClass); | |
| 23 | |
| 24 ClassBuilder.forClass(ClassElement cls, this.namer) | |
| 25 : isForActualClass = true, | |
| 26 element = cls; | |
| 27 | |
| 28 ClassBuilder.forStatics(this.element, this.namer) : isForActualClass = false; | |
| 29 | |
| 30 jsAst.Property addProperty(jsAst.Literal name, jsAst.Expression value) { | |
| 31 jsAst.Property property = new jsAst.Property(js.quoteName(name), value); | |
| 32 properties.add(property); | |
| 33 return property; | |
| 34 } | |
| 35 | |
| 36 jsAst.Property addPropertyByName(String name, jsAst.Expression value) { | |
| 37 jsAst.Property property = new jsAst.Property(js.string(name), value); | |
| 38 properties.add(property); | |
| 39 return property; | |
| 40 } | |
| 41 | |
| 42 void addField(jsAst.Literal field) { | |
| 43 fields.add(field); | |
| 44 } | |
| 45 | |
| 46 static String functionTypeEncodingDescription = | |
| 47 'For simple function types the function type is stored in the metadata ' | |
| 48 'and the index is encoded into the superclass field.'; | |
| 49 | |
| 50 static String fieldEncodingDescription = | |
| 51 'Fields are encoded as a comma separated list. If there is a superclass ' | |
| 52 '(and possibly a function type encoding) the fields are separated from ' | |
| 53 'the superclass by a semicolon.'; | |
| 54 | |
| 55 jsAst.ObjectInitializer toObjectInitializer( | |
| 56 {bool emitClassDescriptor: true}) { | |
| 57 List<jsAst.Literal> parts = <jsAst.Literal>[]; | |
| 58 if (isForActualClass) { | |
| 59 if (superName != null) { | |
| 60 parts.add(superName); | |
| 61 if (functionType != null) { | |
| 62 // See [functionTypeEncodingDescription] above. | |
| 63 parts.add(js.stringPart(':')); | |
| 64 parts.add(functionType); | |
| 65 } | |
| 66 } | |
| 67 parts.add(js.stringPart(';')); | |
| 68 } | |
| 69 // See [fieldEncodingDescription] above. | |
| 70 parts.addAll(js.joinLiterals(fields, js.stringPart(','))); | |
| 71 var classData = js.concatenateStrings(parts, addQuotes: true); | |
| 72 if (fieldMetadata != null) { | |
| 73 // If we need to store fieldMetadata, classData is turned into an array, | |
| 74 // and the field metadata is appended. So if classData is just a string, | |
| 75 // there is no field metadata. | |
| 76 classData = | |
| 77 new jsAst.ArrayInitializer([classData]..addAll(fieldMetadata)); | |
| 78 } | |
| 79 List<jsAst.Property> fieldsAndProperties; | |
| 80 if (emitClassDescriptor) { | |
| 81 fieldsAndProperties = <jsAst.Property>[]; | |
| 82 fieldsAndProperties.add( | |
| 83 new jsAst.Property( | |
| 84 js.string(namer.classDescriptorProperty), classData)); | |
| 85 fieldsAndProperties.addAll(properties); | |
| 86 } else { | |
| 87 fieldsAndProperties = properties; | |
| 88 } | |
| 89 return new jsAst.ObjectInitializer(fieldsAndProperties, isOneLiner: false); | |
| 90 } | |
| 91 } | |
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Chromium Code Reviews
Issue 1220333003:
dart2js: Rename emitters. (Closed)
Base URL: git@github.com:dart-lang/sdk.git@master