| // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| library summary_resynthesizer; |
| |
| import 'dart:collection'; |
| |
| import 'package:analyzer/dart/ast/ast.dart'; |
| import 'package:analyzer/dart/element/element.dart'; |
| import 'package:analyzer/dart/element/type.dart'; |
| import 'package:analyzer/src/dart/element/element.dart'; |
| import 'package:analyzer/src/dart/element/member.dart'; |
| import 'package:analyzer/src/dart/element/type.dart'; |
| import 'package:analyzer/src/generated/element_handle.dart'; |
| import 'package:analyzer/src/generated/engine.dart'; |
| import 'package:analyzer/src/generated/resolver.dart'; |
| import 'package:analyzer/src/generated/scanner.dart'; |
| import 'package:analyzer/src/generated/source_io.dart'; |
| import 'package:analyzer/src/generated/testing/ast_factory.dart'; |
| import 'package:analyzer/src/generated/testing/token_factory.dart'; |
| import 'package:analyzer/src/generated/utilities_dart.dart'; |
| import 'package:analyzer/src/summary/idl.dart'; |
| |
| /** |
| * Implementation of [ElementResynthesizer] used when resynthesizing an element |
| * model from summaries. |
| */ |
| abstract class SummaryResynthesizer extends ElementResynthesizer { |
| /** |
| * The parent [SummaryResynthesizer] which is asked to resynthesize elements |
| * and get summaries before this resynthesizer attempts to do this. |
| * Can be `null`. |
| */ |
| final SummaryResynthesizer parent; |
| |
| /** |
| * Source factory used to convert URIs to [Source] objects. |
| */ |
| final SourceFactory sourceFactory; |
| |
| /** |
| * Cache of [Source] objects that have already been converted from URIs. |
| */ |
| final Map<String, Source> _sources = <String, Source>{}; |
| |
| /** |
| * The [TypeProvider] used to obtain core types (such as Object, int, List, |
| * and dynamic) during resynthesis. |
| */ |
| final TypeProvider typeProvider; |
| |
| /** |
| * Indicates whether the summary should be resynthesized assuming strong mode |
| * semantics. |
| */ |
| final bool strongMode; |
| |
| /** |
| * Map of top level elements resynthesized from summaries. The three map |
| * keys are the first three elements of the element's location (the library |
| * URI, the compilation unit URI, and the name of the top level declaration). |
| */ |
| final Map<String, Map<String, Map<String, Element>>> _resynthesizedElements = |
| <String, Map<String, Map<String, Element>>>{}; |
| |
| /** |
| * Map of libraries which have been resynthesized from summaries. The map |
| * key is the library URI. |
| */ |
| final Map<String, LibraryElement> _resynthesizedLibraries = |
| <String, LibraryElement>{}; |
| |
| SummaryResynthesizer(this.parent, AnalysisContext context, this.typeProvider, |
| this.sourceFactory, this.strongMode) |
| : super(context); |
| |
| /** |
| * Number of libraries that have been resynthesized so far. |
| */ |
| int get resynthesisCount => _resynthesizedLibraries.length; |
| |
| /** |
| * Perform delayed finalization of the `dart:core` and `dart:async` libraries. |
| */ |
| void finalizeCoreAsyncLibraries() { |
| (_resynthesizedLibraries['dart:core'] as LibraryElementImpl) |
| .createLoadLibraryFunction(typeProvider); |
| (_resynthesizedLibraries['dart:async'] as LibraryElementImpl) |
| .createLoadLibraryFunction(typeProvider); |
| } |
| |
| @override |
| Element getElement(ElementLocation location) { |
| List<String> components = location.components; |
| String libraryUri = components[0]; |
| // Ask the parent resynthesizer. |
| if (parent != null && parent._hasLibrarySummary(libraryUri)) { |
| return parent.getElement(location); |
| } |
| // Resynthesize locally. |
| if (components.length == 1) { |
| return getLibraryElement(libraryUri); |
| } else if (components.length == 3 || components.length == 4) { |
| Map<String, Map<String, Element>> libraryMap = |
| _resynthesizedElements[libraryUri]; |
| if (libraryMap == null) { |
| getLibraryElement(libraryUri); |
| libraryMap = _resynthesizedElements[libraryUri]; |
| assert(libraryMap != null); |
| } |
| Map<String, Element> compilationUnitElements = libraryMap[components[1]]; |
| Element element; |
| if (compilationUnitElements != null) { |
| element = compilationUnitElements[components[2]]; |
| } |
| if (element != null && components.length == 4) { |
| String name = components[3]; |
| Element parentElement = element; |
| if (parentElement is ClassElement) { |
| if (name.endsWith('?')) { |
| element = |
| parentElement.getGetter(name.substring(0, name.length - 1)); |
| } else if (name.endsWith('=')) { |
| element = |
| parentElement.getSetter(name.substring(0, name.length - 1)); |
| } else if (name.isEmpty) { |
| element = parentElement.unnamedConstructor; |
| } else { |
| element = parentElement.getField(name) ?? |
| parentElement.getMethod(name) ?? |
| parentElement.getNamedConstructor(name); |
| } |
| } else { |
| // The only elements that are currently retrieved using 4-component |
| // locations are class members. |
| throw new StateError( |
| '4-element locations not supported for ${element.runtimeType}'); |
| } |
| } |
| if (element == null) { |
| throw new Exception('Element not found in summary: $location'); |
| } |
| return element; |
| } else { |
| throw new UnimplementedError(location.toString()); |
| } |
| } |
| |
| /** |
| * Get the [LibraryElement] for the given [uri], resynthesizing it if it |
| * hasn't been resynthesized already. |
| */ |
| LibraryElement getLibraryElement(String uri) { |
| if (parent != null && parent._hasLibrarySummary(uri)) { |
| return parent.getLibraryElement(uri); |
| } |
| return _resynthesizedLibraries.putIfAbsent(uri, () { |
| LinkedLibrary serializedLibrary = _getLinkedSummaryOrThrow(uri); |
| List<UnlinkedUnit> serializedUnits = <UnlinkedUnit>[ |
| _getUnlinkedSummaryOrThrow(uri) |
| ]; |
| Source librarySource = _getSource(uri); |
| for (String part in serializedUnits[0].publicNamespace.parts) { |
| Source partSource = sourceFactory.resolveUri(librarySource, part); |
| String partAbsUri = partSource.uri.toString(); |
| serializedUnits.add(_getUnlinkedSummaryOrThrow(partAbsUri)); |
| } |
| _LibraryResynthesizer libraryResynthesizer = new _LibraryResynthesizer( |
| this, serializedLibrary, serializedUnits, librarySource); |
| LibraryElement library = libraryResynthesizer.buildLibrary(); |
| _resynthesizedElements[uri] = libraryResynthesizer.resummarizedElements; |
| return library; |
| }); |
| } |
| |
| /** |
| * Return the [LinkedLibrary] for the given [uri] or `null` if it could not |
| * be found. Caller has already checked that `parent.hasLibrarySummary(uri)` |
| * returns `false`. |
| */ |
| LinkedLibrary getLinkedSummary(String uri); |
| |
| /** |
| * Return the [UnlinkedUnit] for the given [uri] or `null` if it could not |
| * be found. Caller has already checked that `parent.hasLibrarySummary(uri)` |
| * returns `false`. |
| */ |
| UnlinkedUnit getUnlinkedSummary(String uri); |
| |
| /** |
| * Return `true` if this resynthesizer can provide summaries of the libraries |
| * with the given [uri]. Caller has already checked that |
| * `parent.hasLibrarySummary(uri)` returns `false`. |
| */ |
| bool hasLibrarySummary(String uri); |
| |
| /** |
| * Return the [LinkedLibrary] for the given [uri] or throw [StateError] if it |
| * could not be found. |
| */ |
| LinkedLibrary _getLinkedSummaryOrThrow(String uri) { |
| if (parent != null && parent._hasLibrarySummary(uri)) { |
| return parent._getLinkedSummaryOrThrow(uri); |
| } |
| LinkedLibrary summary = getLinkedSummary(uri); |
| if (summary != null) { |
| return summary; |
| } |
| throw new StateError('Unable to find linked summary: $uri'); |
| } |
| |
| /** |
| * Get the [Source] object for the given [uri]. |
| */ |
| Source _getSource(String uri) { |
| return _sources.putIfAbsent(uri, () => sourceFactory.forUri(uri)); |
| } |
| |
| /** |
| * Return the [UnlinkedUnit] for the given [uri] or throw [StateError] if it |
| * could not be found. |
| */ |
| UnlinkedUnit _getUnlinkedSummaryOrThrow(String uri) { |
| if (parent != null && parent._hasLibrarySummary(uri)) { |
| return parent._getUnlinkedSummaryOrThrow(uri); |
| } |
| UnlinkedUnit summary = getUnlinkedSummary(uri); |
| if (summary != null) { |
| return summary; |
| } |
| throw new StateError('Unable to find unlinked summary: $uri'); |
| } |
| |
| /** |
| * Return `true` if this resynthesizer can provide summaries of the libraries |
| * with the given [uri]. |
| */ |
| bool _hasLibrarySummary(String uri) { |
| if (parent != null && parent._hasLibrarySummary(uri)) { |
| return true; |
| } |
| return hasLibrarySummary(uri); |
| } |
| } |
| |
| /** |
| * Builder of [Expression]s from [UnlinkedConst]s. |
| */ |
| class _ConstExprBuilder { |
| final _LibraryResynthesizer resynthesizer; |
| final UnlinkedConst uc; |
| |
| int intPtr = 0; |
| int doublePtr = 0; |
| int stringPtr = 0; |
| int refPtr = 0; |
| final List<Expression> stack = <Expression>[]; |
| |
| _ConstExprBuilder(this.resynthesizer, this.uc); |
| |
| Expression get expr => stack.single; |
| |
| Expression build() { |
| if (uc.isInvalid) { |
| return AstFactory.identifier3(r'$$invalidConstExpr$$'); |
| } |
| for (UnlinkedConstOperation operation in uc.operations) { |
| switch (operation) { |
| case UnlinkedConstOperation.pushNull: |
| _push(AstFactory.nullLiteral()); |
| break; |
| // bool |
| case UnlinkedConstOperation.pushFalse: |
| _push(AstFactory.booleanLiteral(false)); |
| break; |
| case UnlinkedConstOperation.pushTrue: |
| _push(AstFactory.booleanLiteral(true)); |
| break; |
| // literals |
| case UnlinkedConstOperation.pushInt: |
| int value = uc.ints[intPtr++]; |
| _push(AstFactory.integer(value)); |
| break; |
| case UnlinkedConstOperation.pushLongInt: |
| int value = 0; |
| int count = uc.ints[intPtr++]; |
| for (int i = 0; i < count; i++) { |
| int next = uc.ints[intPtr++]; |
| value = value << 32 | next; |
| } |
| _push(AstFactory.integer(value)); |
| break; |
| case UnlinkedConstOperation.pushDouble: |
| double value = uc.doubles[doublePtr++]; |
| _push(AstFactory.doubleLiteral(value)); |
| break; |
| case UnlinkedConstOperation.makeSymbol: |
| String component = uc.strings[stringPtr++]; |
| _push(AstFactory.symbolLiteral([component])); |
| break; |
| // String |
| case UnlinkedConstOperation.pushString: |
| String value = uc.strings[stringPtr++]; |
| _push(AstFactory.string2(value)); |
| break; |
| case UnlinkedConstOperation.concatenate: |
| int count = uc.ints[intPtr++]; |
| List<InterpolationElement> elements = <InterpolationElement>[]; |
| for (int i = 0; i < count; i++) { |
| Expression expr = _pop(); |
| InterpolationElement element = _newInterpolationElement(expr); |
| elements.insert(0, element); |
| } |
| _push(AstFactory.string(elements)); |
| break; |
| // binary |
| case UnlinkedConstOperation.equal: |
| _pushBinary(TokenType.EQ_EQ); |
| break; |
| case UnlinkedConstOperation.notEqual: |
| _pushBinary(TokenType.BANG_EQ); |
| break; |
| case UnlinkedConstOperation.and: |
| _pushBinary(TokenType.AMPERSAND_AMPERSAND); |
| break; |
| case UnlinkedConstOperation.or: |
| _pushBinary(TokenType.BAR_BAR); |
| break; |
| case UnlinkedConstOperation.bitXor: |
| _pushBinary(TokenType.CARET); |
| break; |
| case UnlinkedConstOperation.bitAnd: |
| _pushBinary(TokenType.AMPERSAND); |
| break; |
| case UnlinkedConstOperation.bitOr: |
| _pushBinary(TokenType.BAR); |
| break; |
| case UnlinkedConstOperation.bitShiftLeft: |
| _pushBinary(TokenType.LT_LT); |
| break; |
| case UnlinkedConstOperation.bitShiftRight: |
| _pushBinary(TokenType.GT_GT); |
| break; |
| case UnlinkedConstOperation.add: |
| _pushBinary(TokenType.PLUS); |
| break; |
| case UnlinkedConstOperation.subtract: |
| _pushBinary(TokenType.MINUS); |
| break; |
| case UnlinkedConstOperation.multiply: |
| _pushBinary(TokenType.STAR); |
| break; |
| case UnlinkedConstOperation.divide: |
| _pushBinary(TokenType.SLASH); |
| break; |
| case UnlinkedConstOperation.floorDivide: |
| _pushBinary(TokenType.TILDE_SLASH); |
| break; |
| case UnlinkedConstOperation.modulo: |
| _pushBinary(TokenType.PERCENT); |
| break; |
| case UnlinkedConstOperation.greater: |
| _pushBinary(TokenType.GT); |
| break; |
| case UnlinkedConstOperation.greaterEqual: |
| _pushBinary(TokenType.GT_EQ); |
| break; |
| case UnlinkedConstOperation.less: |
| _pushBinary(TokenType.LT); |
| break; |
| case UnlinkedConstOperation.lessEqual: |
| _pushBinary(TokenType.LT_EQ); |
| break; |
| // prefix |
| case UnlinkedConstOperation.complement: |
| _pushPrefix(TokenType.TILDE); |
| break; |
| case UnlinkedConstOperation.negate: |
| _pushPrefix(TokenType.MINUS); |
| break; |
| case UnlinkedConstOperation.not: |
| _pushPrefix(TokenType.BANG); |
| break; |
| // conditional |
| case UnlinkedConstOperation.conditional: |
| Expression elseExpr = _pop(); |
| Expression thenExpr = _pop(); |
| Expression condition = _pop(); |
| _push( |
| AstFactory.conditionalExpression(condition, thenExpr, elseExpr)); |
| break; |
| // identical |
| case UnlinkedConstOperation.identical: |
| Expression second = _pop(); |
| Expression first = _pop(); |
| _push(AstFactory.methodInvocation( |
| null, 'identical', <Expression>[first, second])); |
| break; |
| // containers |
| case UnlinkedConstOperation.makeUntypedList: |
| _pushList(null); |
| break; |
| case UnlinkedConstOperation.makeTypedList: |
| TypeName itemType = _newTypeName(); |
| _pushList(AstFactory.typeArgumentList(<TypeName>[itemType])); |
| break; |
| case UnlinkedConstOperation.makeUntypedMap: |
| _pushMap(null); |
| break; |
| case UnlinkedConstOperation.makeTypedMap: |
| TypeName keyType = _newTypeName(); |
| TypeName valueType = _newTypeName(); |
| _pushMap(AstFactory.typeArgumentList(<TypeName>[keyType, valueType])); |
| break; |
| case UnlinkedConstOperation.pushReference: |
| EntityRef ref = uc.references[refPtr++]; |
| _ReferenceInfo info = resynthesizer.referenceInfos[ref.reference]; |
| if (info.element != null) { |
| SimpleIdentifier node = AstFactory.identifier3(info.name); |
| node.staticElement = info.element; |
| _push(node); |
| } else { |
| throw new StateError('Unsupported reference ${ref.toMap()}'); |
| } |
| break; |
| case UnlinkedConstOperation.invokeConstructor: |
| _pushInstanceCreation(); |
| break; |
| case UnlinkedConstOperation.length: |
| Expression target = _pop(); |
| SimpleIdentifier property = AstFactory.identifier3('length'); |
| property.staticElement = |
| resynthesizer._buildStringLengthPropertyAccessorElement(); |
| _push(AstFactory.propertyAccess(target, property)); |
| break; |
| case UnlinkedConstOperation.pushConstructorParameter: |
| String name = uc.strings[stringPtr++]; |
| SimpleIdentifier identifier = AstFactory.identifier3(name); |
| identifier.staticElement = resynthesizer.currentConstructor.parameters |
| .firstWhere((parameter) => parameter.name == name, |
| orElse: () => throw new StateError( |
| 'Unable to resolve constructor parameter: $name')); |
| _push(identifier); |
| break; |
| } |
| } |
| return stack.single; |
| } |
| |
| TypeName _buildTypeAst(DartType type) { |
| if (type is DynamicTypeImpl) { |
| TypeName node = AstFactory.typeName4('dynamic'); |
| node.type = type; |
| (node.name as SimpleIdentifier).staticElement = type.element; |
| return node; |
| } else if (type is InterfaceType) { |
| List<DartType> typeArguments = type.typeArguments; |
| List<TypeName> argumentNodes = typeArguments.every((a) => a.isDynamic) |
| ? null |
| : typeArguments.map(_buildTypeAst).toList(); |
| TypeName node = AstFactory.typeName4(type.name, argumentNodes); |
| node.type = type; |
| (node.name as SimpleIdentifier).staticElement = type.element; |
| return node; |
| } |
| throw new StateError('Unsupported type $type'); |
| } |
| |
| /** |
| * Return the [ConstructorElement] by applying [typeArgumentRefs] to the |
| * given linked [info]. Both cases when [info] is a [ClassElement] and |
| * [ConstructorElement] are supported. |
| */ |
| _DeferredConstructorElement _createConstructorElement( |
| _ReferenceInfo info, List<EntityRef> typeArgumentRefs) { |
| bool isClass = info.element is ClassElement; |
| _ReferenceInfo classInfo = isClass ? info : info.enclosing; |
| List<DartType> typeArguments = |
| typeArgumentRefs.map(resynthesizer.buildType).toList(); |
| InterfaceType classType = classInfo.buildType((i) { |
| if (i < typeArguments.length) { |
| return typeArguments[i]; |
| } else { |
| return DynamicTypeImpl.instance; |
| } |
| }, const <int>[]); |
| String name = isClass ? '' : info.name; |
| return new _DeferredConstructorElement(classType, name); |
| } |
| |
| InterpolationElement _newInterpolationElement(Expression expr) { |
| if (expr is SimpleStringLiteral) { |
| return new InterpolationString(expr.literal, expr.value); |
| } else { |
| return new InterpolationExpression( |
| TokenFactory.tokenFromType(TokenType.STRING_INTERPOLATION_EXPRESSION), |
| expr, |
| TokenFactory.tokenFromType(TokenType.CLOSE_CURLY_BRACKET)); |
| } |
| } |
| |
| /** |
| * Convert the next reference to the [DartType] and return the AST |
| * corresponding to this type. |
| */ |
| TypeName _newTypeName() { |
| EntityRef typeRef = uc.references[refPtr++]; |
| DartType type = resynthesizer.buildType(typeRef); |
| return _buildTypeAst(type); |
| } |
| |
| Expression _pop() => stack.removeLast(); |
| |
| void _push(Expression expr) { |
| stack.add(expr); |
| } |
| |
| void _pushBinary(TokenType operator) { |
| Expression right = _pop(); |
| Expression left = _pop(); |
| _push(AstFactory.binaryExpression(left, operator, right)); |
| } |
| |
| void _pushInstanceCreation() { |
| EntityRef ref = uc.references[refPtr++]; |
| _ReferenceInfo info = resynthesizer.referenceInfos[ref.reference]; |
| // prepare ConstructorElement |
| String constructorName; |
| if (info.element is ConstructorElement) { |
| constructorName = info.name; |
| } else if (info.element is ClassElement) { |
| constructorName = null; |
| } else { |
| throw new StateError('Unsupported element for invokeConstructor ' |
| '${info.element?.runtimeType}'); |
| } |
| _DeferredConstructorElement constructorElement = |
| _createConstructorElement(info, ref.typeArguments); |
| // prepare arguments |
| List<Expression> arguments; |
| { |
| int numNamedArgs = uc.ints[intPtr++]; |
| int numPositionalArgs = uc.ints[intPtr++]; |
| int numArgs = numNamedArgs + numPositionalArgs; |
| arguments = _removeTopItems(numArgs); |
| // add names to the named arguments |
| for (int i = 0; i < numNamedArgs; i++) { |
| String name = uc.strings[stringPtr++]; |
| int index = numPositionalArgs + i; |
| arguments[index] = AstFactory.namedExpression2(name, arguments[index]); |
| } |
| } |
| // create TypeName |
| TypeName typeNode = _buildTypeAst(constructorElement.definingType); |
| // create ConstructorName |
| ConstructorName constructorNode; |
| if (constructorName != null) { |
| constructorNode = AstFactory.constructorName(typeNode, constructorName); |
| constructorNode.name.staticElement = constructorElement; |
| } else { |
| constructorNode = AstFactory.constructorName(typeNode, null); |
| } |
| constructorNode.staticElement = constructorElement; |
| // create InstanceCreationExpression |
| InstanceCreationExpression instanceCreation = AstFactory |
| .instanceCreationExpression(Keyword.CONST, constructorNode, arguments); |
| instanceCreation.staticElement = constructorElement; |
| _push(instanceCreation); |
| } |
| |
| void _pushList(TypeArgumentList typeArguments) { |
| int count = uc.ints[intPtr++]; |
| List<Expression> elements = <Expression>[]; |
| for (int i = 0; i < count; i++) { |
| elements.insert(0, _pop()); |
| } |
| _push(AstFactory.listLiteral2(Keyword.CONST, typeArguments, elements)); |
| } |
| |
| void _pushMap(TypeArgumentList typeArguments) { |
| int count = uc.ints[intPtr++]; |
| List<MapLiteralEntry> entries = <MapLiteralEntry>[]; |
| for (int i = 0; i < count; i++) { |
| Expression value = _pop(); |
| Expression key = _pop(); |
| entries.insert(0, AstFactory.mapLiteralEntry2(key, value)); |
| } |
| _push(AstFactory.mapLiteral(Keyword.CONST, typeArguments, entries)); |
| } |
| |
| void _pushPrefix(TokenType operator) { |
| Expression operand = _pop(); |
| _push(AstFactory.prefixExpression(operator, operand)); |
| } |
| |
| List<Expression> _removeTopItems(int count) { |
| int start = stack.length - count; |
| int end = stack.length; |
| List<Expression> items = stack.getRange(start, end).toList(); |
| stack.removeRange(start, end); |
| return items; |
| } |
| } |
| |
| /** |
| * The constructor element that has been resynthesized from a summary. The |
| * actual element won't be constructed until it is requested. But properties |
| * [definingType], [displayName], [enclosingElement] and [name] can be used |
| * without creating the actual element. |
| */ |
| class _DeferredConstructorElement extends ConstructorElementHandle { |
| final InterfaceType definingType; |
| final String name; |
| |
| factory _DeferredConstructorElement(InterfaceType definingType, String name) { |
| List<String> components = definingType.element.location.components.toList(); |
| components.add(name); |
| ElementLocationImpl location = new ElementLocationImpl.con3(components); |
| return new _DeferredConstructorElement._(definingType, name, location); |
| } |
| |
| _DeferredConstructorElement._( |
| this.definingType, this.name, ElementLocation location) |
| : super(null, location); |
| |
| @override |
| Element get actualElement { |
| ConstructorElement element = enclosingElement.getNamedConstructor(name); |
| return new ConstructorMember(element, definingType); |
| } |
| |
| @override |
| AnalysisContext get context => definingType.element.context; |
| |
| @override |
| String get displayName => name; |
| |
| @override |
| ClassElement get enclosingElement { |
| return definingType.element; |
| } |
| } |
| |
| /** |
| * An instance of [_LibraryResynthesizer] is responsible for resynthesizing the |
| * elements in a single library from that library's summary. |
| */ |
| class _LibraryResynthesizer { |
| /** |
| * The [SummaryResynthesizer] which is being used to obtain summaries. |
| */ |
| final SummaryResynthesizer summaryResynthesizer; |
| |
| /** |
| * Linked summary of the library to be resynthesized. |
| */ |
| final LinkedLibrary linkedLibrary; |
| |
| /** |
| * Unlinked compilation units constituting the library to be resynthesized. |
| */ |
| final List<UnlinkedUnit> unlinkedUnits; |
| |
| /** |
| * [Source] object for the library to be resynthesized. |
| */ |
| final Source librarySource; |
| |
| /** |
| * Indicates whether [librarySource] is the `dart:core` library. |
| */ |
| bool isCoreLibrary; |
| |
| /** |
| * Classes which should have their supertype set to "object" once |
| * resynthesis is complete. Only used if [isCoreLibrary] is `true`. |
| */ |
| List<ClassElementImpl> delayedObjectSubclasses = <ClassElementImpl>[]; |
| |
| /** |
| * [ElementHolder] into which resynthesized elements should be placed. This |
| * object is recreated afresh for each unit in the library, and is used to |
| * populate the [CompilationUnitElement]. |
| */ |
| ElementHolder unitHolder; |
| |
| /** |
| * The [LinkedUnit] from which elements are currently being resynthesized. |
| */ |
| LinkedUnit linkedUnit; |
| |
| /** |
| * The [UnlinkedUnit] from which elements are currently being resynthesized. |
| */ |
| UnlinkedUnit unlinkedUnit; |
| |
| /** |
| * Map from slot id to the corresponding [EntityRef] object for linked types |
| * (i.e. propagated and inferred types). |
| */ |
| Map<int, EntityRef> linkedTypeMap; |
| |
| /** |
| * The [CompilationUnitElementImpl] for the compilation unit currently being |
| * resynthesized. |
| */ |
| CompilationUnitElementImpl currentCompilationUnit; |
| |
| /** |
| * The [ConstructorElementImpl] for the constructor currently being |
| * resynthesized. |
| */ |
| ConstructorElementImpl currentConstructor; |
| |
| /** |
| * Map of top level elements that have been resynthesized so far. The first |
| * key is the URI of the compilation unit; the second is the name of the top |
| * level element. |
| */ |
| final Map<String, Map<String, Element>> resummarizedElements = |
| <String, Map<String, Element>>{}; |
| |
| /** |
| * Type parameters for the generic class, typedef, or executable currently |
| * being resynthesized, if any. If multiple entities with type parameters |
| * are nested (e.g. a generic executable inside a generic class), this is the |
| * concatenation of all type parameters from all declarations currently in |
| * force, with the outermost declaration appearing first. If there are no |
| * type parameters, or we are not currently resynthesizing a class, typedef, |
| * or executable, then this is an empty list. |
| */ |
| List<TypeParameterElement> currentTypeParameters = <TypeParameterElement>[]; |
| |
| /** |
| * If a class is currently being resynthesized, map from field name to the |
| * corresponding field element. This is used when resynthesizing |
| * initializing formal parameters. |
| */ |
| Map<String, FieldElementImpl> fields; |
| |
| /** |
| * If a class is currently being resynthesized, map from constructor name to |
| * the corresponding constructor element. This is used when resynthesizing |
| * constructor initializers. |
| */ |
| Map<String, ConstructorElementImpl> constructors; |
| |
| /** |
| * List of [_ReferenceInfo] objects describing the references in the current |
| * compilation unit. |
| */ |
| List<_ReferenceInfo> referenceInfos; |
| |
| _LibraryResynthesizer(this.summaryResynthesizer, this.linkedLibrary, |
| this.unlinkedUnits, this.librarySource) { |
| isCoreLibrary = librarySource.uri.toString() == 'dart:core'; |
| } |
| |
| /** |
| * Return a list of type arguments corresponding to [currentTypeParameters]. |
| */ |
| List<TypeParameterType> get currentTypeArguments => currentTypeParameters |
| ?.map((TypeParameterElement param) => param.type) |
| ?.toList(); |
| |
| /** |
| * Build the annotations for the given [element]. |
| */ |
| void buildAnnotations( |
| ElementImpl element, List<UnlinkedConst> serializedAnnotations) { |
| if (serializedAnnotations.isNotEmpty) { |
| element.metadata = serializedAnnotations.map((UnlinkedConst a) { |
| ElementAnnotationImpl elementAnnotation = |
| new ElementAnnotationImpl(this.currentCompilationUnit); |
| Expression constExpr = _buildConstExpression(a); |
| if (constExpr is Identifier) { |
| elementAnnotation.element = constExpr.staticElement; |
| elementAnnotation.annotationAst = AstFactory.annotation(constExpr); |
| } else if (constExpr is InstanceCreationExpression) { |
| elementAnnotation.element = constExpr.staticElement; |
| Identifier typeName = constExpr.constructorName.type.name; |
| SimpleIdentifier constructorName = constExpr.constructorName.name; |
| if (typeName is SimpleIdentifier && constructorName != null) { |
| // E.g. `@cls.ctor()`. Since `cls.ctor` would have been parsed as |
| // a PrefixedIdentifier, we need to resynthesize it as one. |
| typeName = AstFactory.identifier(typeName, constructorName); |
| constructorName = null; |
| } |
| elementAnnotation.annotationAst = AstFactory.annotation2( |
| typeName, constructorName, constExpr.argumentList); |
| } else { |
| throw new StateError( |
| 'Unexpected annotation type: ${constExpr.runtimeType}'); |
| } |
| return elementAnnotation; |
| }).toList(); |
| } |
| } |
| |
| /** |
| * Resynthesize a [ClassElement] and place it in [unitHolder]. |
| */ |
| void buildClass(UnlinkedClass serializedClass) { |
| try { |
| currentTypeParameters = |
| serializedClass.typeParameters.map(buildTypeParameter).toList(); |
| for (int i = 0; i < serializedClass.typeParameters.length; i++) { |
| finishTypeParameter( |
| serializedClass.typeParameters[i], currentTypeParameters[i]); |
| } |
| ClassElementImpl classElement = new ClassElementImpl( |
| serializedClass.name, serializedClass.nameOffset); |
| classElement.abstract = serializedClass.isAbstract; |
| classElement.mixinApplication = serializedClass.isMixinApplication; |
| InterfaceTypeImpl correspondingType = new InterfaceTypeImpl(classElement); |
| if (serializedClass.supertype != null) { |
| classElement.supertype = buildType(serializedClass.supertype); |
| } else if (!serializedClass.hasNoSupertype) { |
| if (isCoreLibrary) { |
| delayedObjectSubclasses.add(classElement); |
| } else { |
| classElement.supertype = summaryResynthesizer.typeProvider.objectType; |
| } |
| } |
| classElement.interfaces = |
| serializedClass.interfaces.map(buildType).toList(); |
| classElement.mixins = serializedClass.mixins.map(buildType).toList(); |
| classElement.typeParameters = currentTypeParameters; |
| ElementHolder memberHolder = new ElementHolder(); |
| fields = <String, FieldElementImpl>{}; |
| for (UnlinkedVariable serializedVariable in serializedClass.fields) { |
| buildVariable(serializedVariable, memberHolder); |
| } |
| bool constructorFound = false; |
| constructors = <String, ConstructorElementImpl>{}; |
| for (UnlinkedExecutable serializedExecutable |
| in serializedClass.executables) { |
| switch (serializedExecutable.kind) { |
| case UnlinkedExecutableKind.constructor: |
| constructorFound = true; |
| buildConstructor( |
| serializedExecutable, memberHolder, correspondingType); |
| break; |
| case UnlinkedExecutableKind.functionOrMethod: |
| case UnlinkedExecutableKind.getter: |
| case UnlinkedExecutableKind.setter: |
| buildExecutable(serializedExecutable, memberHolder); |
| break; |
| } |
| } |
| if (!serializedClass.isMixinApplication) { |
| if (!constructorFound) { |
| // Synthesize implicit constructors. |
| ConstructorElementImpl constructor = |
| new ConstructorElementImpl('', -1); |
| constructor.synthetic = true; |
| constructor.returnType = correspondingType; |
| constructor.type = new FunctionTypeImpl.elementWithNameAndArgs( |
| constructor, null, currentTypeArguments, false); |
| memberHolder.addConstructor(constructor); |
| } |
| classElement.constructors = memberHolder.constructors; |
| } |
| classElement.accessors = memberHolder.accessors; |
| classElement.fields = memberHolder.fields; |
| classElement.methods = memberHolder.methods; |
| correspondingType.typeArguments = currentTypeArguments; |
| classElement.type = correspondingType; |
| buildDocumentation(classElement, serializedClass.documentationComment); |
| buildAnnotations(classElement, serializedClass.annotations); |
| resolveConstructorInitializers(classElement); |
| unitHolder.addType(classElement); |
| } finally { |
| currentTypeParameters = <TypeParameterElement>[]; |
| fields = null; |
| constructors = null; |
| } |
| } |
| |
| /** |
| * Resynthesize a [NamespaceCombinator]. |
| */ |
| NamespaceCombinator buildCombinator(UnlinkedCombinator serializedCombinator) { |
| if (serializedCombinator.shows.isNotEmpty) { |
| ShowElementCombinatorImpl combinator = new ShowElementCombinatorImpl(); |
| // Note: we call toList() so that we don't retain a reference to the |
| // deserialized data structure. |
| combinator.shownNames = serializedCombinator.shows.toList(); |
| return combinator; |
| } else { |
| HideElementCombinatorImpl combinator = new HideElementCombinatorImpl(); |
| // Note: we call toList() so that we don't retain a reference to the |
| // deserialized data structure. |
| combinator.hiddenNames = serializedCombinator.hides.toList(); |
| return combinator; |
| } |
| } |
| |
| /** |
| * Resynthesize the [ConstructorInitializer] in context of |
| * [currentConstructor], which is used to resolve constructor parameter names. |
| */ |
| ConstructorInitializer buildConstantInitializer( |
| UnlinkedConstructorInitializer serialized) { |
| UnlinkedConstructorInitializerKind kind = serialized.kind; |
| String name = serialized.name; |
| List<Expression> arguments = |
| serialized.arguments.map(_buildConstExpression).toList(); |
| switch (kind) { |
| case UnlinkedConstructorInitializerKind.field: |
| return AstFactory.constructorFieldInitializer( |
| false, name, _buildConstExpression(serialized.expression)); |
| case UnlinkedConstructorInitializerKind.superInvocation: |
| return AstFactory.superConstructorInvocation2( |
| name.isNotEmpty ? name : null, arguments); |
| case UnlinkedConstructorInitializerKind.thisInvocation: |
| return AstFactory.redirectingConstructorInvocation2( |
| name.isNotEmpty ? name : null, arguments); |
| } |
| } |
| |
| /** |
| * Resynthesize a [ConstructorElement] and place it in the given [holder]. |
| * [classType] is the type of the class for which this element is a |
| * constructor. |
| */ |
| void buildConstructor(UnlinkedExecutable serializedExecutable, |
| ElementHolder holder, InterfaceType classType) { |
| assert(serializedExecutable.kind == UnlinkedExecutableKind.constructor); |
| currentConstructor = new ConstructorElementImpl( |
| serializedExecutable.name, serializedExecutable.nameOffset); |
| constructors[serializedExecutable.name] = currentConstructor; |
| currentConstructor.returnType = classType; |
| buildExecutableCommonParts(currentConstructor, serializedExecutable); |
| currentConstructor.factory = serializedExecutable.isFactory; |
| currentConstructor.const2 = serializedExecutable.isConst; |
| currentConstructor.constantInitializers = serializedExecutable |
| .constantInitializers |
| .map(buildConstantInitializer) |
| .toList(); |
| holder.addConstructor(currentConstructor); |
| currentConstructor = null; |
| } |
| |
| /** |
| * Build the documentation for the given [element]. Does nothing if |
| * [serializedDocumentationComment] is `null`. |
| */ |
| void buildDocumentation(ElementImpl element, |
| UnlinkedDocumentationComment serializedDocumentationComment) { |
| if (serializedDocumentationComment != null) { |
| element.documentationComment = serializedDocumentationComment.text; |
| element.setDocRange(serializedDocumentationComment.offset, |
| serializedDocumentationComment.length); |
| } |
| } |
| |
| /** |
| * Resynthesize the [ClassElement] corresponding to an enum, along with the |
| * associated fields and implicit accessors. |
| */ |
| void buildEnum(UnlinkedEnum serializedEnum) { |
| assert(!isCoreLibrary); |
| ClassElementImpl classElement = |
| new ClassElementImpl(serializedEnum.name, serializedEnum.nameOffset); |
| classElement.enum2 = true; |
| InterfaceType enumType = new InterfaceTypeImpl(classElement); |
| classElement.type = enumType; |
| classElement.supertype = summaryResynthesizer.typeProvider.objectType; |
| buildDocumentation(classElement, serializedEnum.documentationComment); |
| buildAnnotations(classElement, serializedEnum.annotations); |
| ElementHolder memberHolder = new ElementHolder(); |
| FieldElementImpl indexField = new FieldElementImpl('index', -1); |
| indexField.final2 = true; |
| indexField.synthetic = true; |
| indexField.type = summaryResynthesizer.typeProvider.intType; |
| memberHolder.addField(indexField); |
| buildImplicitAccessors(indexField, memberHolder); |
| FieldElementImpl valuesField = new ConstFieldElementImpl('values', -1); |
| valuesField.synthetic = true; |
| valuesField.const3 = true; |
| valuesField.static = true; |
| valuesField.type = summaryResynthesizer.typeProvider.listType |
| .substitute4(<DartType>[enumType]); |
| memberHolder.addField(valuesField); |
| buildImplicitAccessors(valuesField, memberHolder); |
| for (UnlinkedEnumValue serializedEnumValue in serializedEnum.values) { |
| ConstFieldElementImpl valueField = new ConstFieldElementImpl( |
| serializedEnumValue.name, serializedEnumValue.nameOffset); |
| valueField.const3 = true; |
| valueField.static = true; |
| valueField.type = enumType; |
| memberHolder.addField(valueField); |
| buildImplicitAccessors(valueField, memberHolder); |
| } |
| classElement.fields = memberHolder.fields; |
| classElement.accessors = memberHolder.accessors; |
| classElement.constructors = <ConstructorElement>[]; |
| unitHolder.addEnum(classElement); |
| } |
| |
| /** |
| * Resynthesize an [ExecutableElement] and place it in the given [holder]. |
| */ |
| void buildExecutable(UnlinkedExecutable serializedExecutable, |
| [ElementHolder holder]) { |
| bool isTopLevel = holder == null; |
| if (holder == null) { |
| holder = unitHolder; |
| } |
| UnlinkedExecutableKind kind = serializedExecutable.kind; |
| String name = serializedExecutable.name; |
| if (kind == UnlinkedExecutableKind.setter) { |
| assert(name.endsWith('=')); |
| name = name.substring(0, name.length - 1); |
| } |
| switch (kind) { |
| case UnlinkedExecutableKind.functionOrMethod: |
| if (isTopLevel) { |
| FunctionElementImpl executableElement = |
| new FunctionElementImpl(name, serializedExecutable.nameOffset); |
| buildExecutableCommonParts(executableElement, serializedExecutable); |
| holder.addFunction(executableElement); |
| } else { |
| MethodElementImpl executableElement = |
| new MethodElementImpl(name, serializedExecutable.nameOffset); |
| executableElement.abstract = serializedExecutable.isAbstract; |
| buildExecutableCommonParts(executableElement, serializedExecutable); |
| executableElement.static = serializedExecutable.isStatic; |
| holder.addMethod(executableElement); |
| } |
| break; |
| case UnlinkedExecutableKind.getter: |
| case UnlinkedExecutableKind.setter: |
| PropertyAccessorElementImpl executableElement = |
| new PropertyAccessorElementImpl( |
| name, serializedExecutable.nameOffset); |
| if (isTopLevel) { |
| executableElement.static = true; |
| } else { |
| executableElement.static = serializedExecutable.isStatic; |
| executableElement.abstract = serializedExecutable.isAbstract; |
| } |
| buildExecutableCommonParts(executableElement, serializedExecutable); |
| DartType type; |
| if (kind == UnlinkedExecutableKind.getter) { |
| executableElement.getter = true; |
| type = executableElement.returnType; |
| } else { |
| executableElement.setter = true; |
| type = executableElement.parameters[0].type; |
| } |
| holder.addAccessor(executableElement); |
| // TODO(paulberry): consider removing implicit variables from the |
| // element model; the spec doesn't call for them, and they cause |
| // trouble when getters/setters exist in different parts. |
| PropertyInducingElementImpl implicitVariable; |
| if (isTopLevel) { |
| implicitVariable = buildImplicitTopLevelVariable(name, kind, holder); |
| } else { |
| FieldElementImpl field = buildImplicitField(name, type, kind, holder); |
| field.static = serializedExecutable.isStatic; |
| implicitVariable = field; |
| } |
| executableElement.variable = implicitVariable; |
| if (kind == UnlinkedExecutableKind.getter) { |
| implicitVariable.getter = executableElement; |
| } else { |
| implicitVariable.setter = executableElement; |
| } |
| break; |
| default: |
| // The only other executable type is a constructor, and that is handled |
| // separately (in [buildConstructor]. So this code should be |
| // unreachable. |
| assert(false); |
| } |
| } |
| |
| /** |
| * Handle the parts of an executable element that are common to constructors, |
| * functions, methods, getters, and setters. |
| */ |
| void buildExecutableCommonParts(ExecutableElementImpl executableElement, |
| UnlinkedExecutable serializedExecutable) { |
| List<TypeParameterType> oldTypeArguments = currentTypeArguments; |
| int oldTypeParametersLength = currentTypeParameters.length; |
| if (serializedExecutable.typeParameters.isNotEmpty) { |
| executableElement.typeParameters = |
| serializedExecutable.typeParameters.map(buildTypeParameter).toList(); |
| currentTypeParameters.addAll(executableElement.typeParameters); |
| } |
| executableElement.parameters = |
| serializedExecutable.parameters.map(buildParameter).toList(); |
| if (serializedExecutable.kind == UnlinkedExecutableKind.constructor) { |
| // Caller handles setting the return type. |
| assert(serializedExecutable.returnType == null); |
| } else { |
| bool isSetter = |
| serializedExecutable.kind == UnlinkedExecutableKind.setter; |
| executableElement.returnType = |
| buildLinkedType(serializedExecutable.inferredReturnTypeSlot) ?? |
| buildType(serializedExecutable.returnType, |
| defaultVoid: isSetter && summaryResynthesizer.strongMode); |
| executableElement.hasImplicitReturnType = |
| serializedExecutable.returnType == null; |
| } |
| executableElement.type = new FunctionTypeImpl.elementWithNameAndArgs( |
| executableElement, null, oldTypeArguments, false); |
| executableElement.external = serializedExecutable.isExternal; |
| currentTypeParameters.removeRange( |
| oldTypeParametersLength, currentTypeParameters.length); |
| buildDocumentation( |
| executableElement, serializedExecutable.documentationComment); |
| buildAnnotations(executableElement, serializedExecutable.annotations); |
| } |
| |
| /** |
| * Resynthesize an [ExportElement], |
| */ |
| ExportElement buildExport(UnlinkedExportPublic serializedExportPublic, |
| UnlinkedExportNonPublic serializedExportNonPublic) { |
| ExportElementImpl exportElement = |
| new ExportElementImpl(serializedExportNonPublic.offset); |
| String exportedLibraryUri = summaryResynthesizer.sourceFactory |
| .resolveUri(librarySource, serializedExportPublic.uri) |
| .uri |
| .toString(); |
| exportElement.exportedLibrary = new LibraryElementHandle( |
| summaryResynthesizer, |
| new ElementLocationImpl.con3(<String>[exportedLibraryUri])); |
| exportElement.uri = serializedExportPublic.uri; |
| exportElement.combinators = |
| serializedExportPublic.combinators.map(buildCombinator).toList(); |
| exportElement.uriOffset = serializedExportNonPublic.uriOffset; |
| exportElement.uriEnd = serializedExportNonPublic.uriEnd; |
| buildAnnotations(exportElement, serializedExportNonPublic.annotations); |
| return exportElement; |
| } |
| |
| /** |
| * Build an [ElementHandle] referring to the entity referred to by the given |
| * [exportName]. |
| */ |
| ElementHandle buildExportName(LinkedExportName exportName) { |
| String name = exportName.name; |
| if (exportName.kind == ReferenceKind.topLevelPropertyAccessor && |
| !name.endsWith('=')) { |
| name += '?'; |
| } |
| ElementLocationImpl location = new ElementLocationImpl.con3( |
| getReferencedLocationComponents( |
| exportName.dependency, exportName.unit, name)); |
| switch (exportName.kind) { |
| case ReferenceKind.classOrEnum: |
| return new ClassElementHandle(summaryResynthesizer, location); |
| case ReferenceKind.typedef: |
| return new FunctionTypeAliasElementHandle( |
| summaryResynthesizer, location); |
| case ReferenceKind.topLevelFunction: |
| return new FunctionElementHandle(summaryResynthesizer, location); |
| case ReferenceKind.topLevelPropertyAccessor: |
| return new PropertyAccessorElementHandle( |
| summaryResynthesizer, location); |
| case ReferenceKind.constructor: |
| case ReferenceKind.propertyAccessor: |
| case ReferenceKind.method: |
| case ReferenceKind.length: |
| case ReferenceKind.prefix: |
| case ReferenceKind.unresolved: |
| // Should never happen. Exported names never refer to import prefixes, |
| // and they always refer to defined top-level entities. |
| throw new StateError('Unexpected export name kind: ${exportName.kind}'); |
| } |
| } |
| |
| /** |
| * Build the export namespace for the library by aggregating together its |
| * [publicNamespace] and [exportNames]. |
| */ |
| Namespace buildExportNamespace( |
| Namespace publicNamespace, List<LinkedExportName> exportNames) { |
| HashMap<String, Element> definedNames = new HashMap<String, Element>(); |
| // Start by populating all the public names from [publicNamespace]. |
| publicNamespace.definedNames.forEach((String name, Element element) { |
| definedNames[name] = element; |
| }); |
| // Add all the names from [exportNames]. |
| for (LinkedExportName exportName in exportNames) { |
| definedNames.putIfAbsent( |
| exportName.name, () => buildExportName(exportName)); |
| } |
| return new Namespace(definedNames); |
| } |
| |
| /** |
| * Build the implicit getter and setter associated with [element], and place |
| * them in [holder]. |
| */ |
| void buildImplicitAccessors( |
| PropertyInducingElementImpl element, ElementHolder holder) { |
| String name = element.name; |
| DartType type = element.type; |
| PropertyAccessorElementImpl getter = |
| new PropertyAccessorElementImpl(name, element.nameOffset); |
| getter.getter = true; |
| getter.static = element.isStatic; |
| getter.synthetic = true; |
| getter.returnType = type; |
| getter.type = new FunctionTypeImpl(getter); |
| getter.variable = element; |
| getter.hasImplicitReturnType = element.hasImplicitType; |
| holder.addAccessor(getter); |
| element.getter = getter; |
| if (!(element.isConst || element.isFinal)) { |
| PropertyAccessorElementImpl setter = |
| new PropertyAccessorElementImpl(name, element.nameOffset); |
| setter.setter = true; |
| setter.static = element.isStatic; |
| setter.synthetic = true; |
| setter.parameters = <ParameterElement>[ |
| new ParameterElementImpl('_$name', element.nameOffset) |
| ..synthetic = true |
| ..type = type |
| ..parameterKind = ParameterKind.REQUIRED |
| ]; |
| setter.returnType = VoidTypeImpl.instance; |
| setter.type = new FunctionTypeImpl(setter); |
| setter.variable = element; |
| holder.addAccessor(setter); |
| element.setter = setter; |
| } |
| } |
| |
| /** |
| * Build the implicit field associated with a getter or setter, and place it |
| * in [holder]. |
| */ |
| FieldElementImpl buildImplicitField(String name, DartType type, |
| UnlinkedExecutableKind kind, ElementHolder holder) { |
| FieldElementImpl field = holder.getField(name); |
| if (field == null) { |
| field = new FieldElementImpl(name, -1); |
| field.synthetic = true; |
| field.final2 = kind == UnlinkedExecutableKind.getter; |
| field.type = type; |
| holder.addField(field); |
| return field; |
| } else { |
| // TODO(paulberry): what if the getter and setter have a type mismatch? |
| field.final2 = false; |
| return field; |
| } |
| } |
| |
| /** |
| * Build the implicit top level variable associated with a getter or setter, |
| * and place it in [holder]. |
| */ |
| PropertyInducingElementImpl buildImplicitTopLevelVariable( |
| String name, UnlinkedExecutableKind kind, ElementHolder holder) { |
| TopLevelVariableElementImpl variable = holder.getTopLevelVariable(name); |
| if (variable == null) { |
| variable = new TopLevelVariableElementImpl(name, -1); |
| variable.synthetic = true; |
| variable.final2 = kind == UnlinkedExecutableKind.getter; |
| holder.addTopLevelVariable(variable); |
| return variable; |
| } else { |
| // TODO(paulberry): what if the getter and setter have a type mismatch? |
| variable.final2 = false; |
| return variable; |
| } |
| } |
| |
| /** |
| * Resynthesize an [ImportElement]. |
| */ |
| ImportElement buildImport(UnlinkedImport serializedImport, int dependency) { |
| bool isSynthetic = serializedImport.isImplicit; |
| ImportElementImpl importElement = |
| new ImportElementImpl(isSynthetic ? -1 : serializedImport.offset); |
| String absoluteUri = summaryResynthesizer.sourceFactory |
| .resolveUri(librarySource, linkedLibrary.dependencies[dependency].uri) |
| .uri |
| .toString(); |
| importElement.importedLibrary = new LibraryElementHandle( |
| summaryResynthesizer, |
| new ElementLocationImpl.con3(<String>[absoluteUri])); |
| if (isSynthetic) { |
| importElement.synthetic = true; |
| } else { |
| importElement.uri = serializedImport.uri; |
| importElement.uriOffset = serializedImport.uriOffset; |
| importElement.uriEnd = serializedImport.uriEnd; |
| importElement.deferred = serializedImport.isDeferred; |
| buildAnnotations(importElement, serializedImport.annotations); |
| } |
| importElement.prefixOffset = serializedImport.prefixOffset; |
| if (serializedImport.prefixReference != 0) { |
| UnlinkedReference serializedPrefix = |
| unlinkedUnits[0].references[serializedImport.prefixReference]; |
| importElement.prefix = new PrefixElementImpl( |
| serializedPrefix.name, serializedImport.prefixOffset); |
| } |
| importElement.combinators = |
| serializedImport.combinators.map(buildCombinator).toList(); |
| return importElement; |
| } |
| |
| /** |
| * Main entry point. Resynthesize the [LibraryElement] and return it. |
| */ |
| LibraryElement buildLibrary() { |
| CompilationUnitElementImpl definingCompilationUnit = |
| new CompilationUnitElementImpl(librarySource.shortName); |
| prepareUnit(definingCompilationUnit, 0); |
| bool hasName = unlinkedUnits[0].libraryName.isNotEmpty; |
| LibraryElementImpl library = new LibraryElementImpl( |
| summaryResynthesizer.context, |
| unlinkedUnits[0].libraryName, |
| hasName ? unlinkedUnits[0].libraryNameOffset : -1, |
| unlinkedUnits[0].libraryNameLength); |
| buildDocumentation(library, unlinkedUnits[0].libraryDocumentationComment); |
| buildAnnotations(library, unlinkedUnits[0].libraryAnnotations); |
| library.definingCompilationUnit = definingCompilationUnit; |
| definingCompilationUnit.source = librarySource; |
| definingCompilationUnit.librarySource = librarySource; |
| List<CompilationUnitElement> parts = <CompilationUnitElement>[]; |
| UnlinkedUnit unlinkedDefiningUnit = unlinkedUnits[0]; |
| assert(unlinkedDefiningUnit.publicNamespace.parts.length + 1 == |
| linkedLibrary.units.length); |
| for (int i = 1; i < linkedLibrary.units.length; i++) { |
| CompilationUnitElementImpl part = buildPart( |
| unlinkedDefiningUnit.publicNamespace.parts[i - 1], |
| unlinkedDefiningUnit.parts[i - 1], |
| unlinkedUnits[i]); |
| parts.add(part); |
| } |
| library.parts = parts; |
| List<ImportElement> imports = <ImportElement>[]; |
| for (int i = 0; i < unlinkedDefiningUnit.imports.length; i++) { |
| imports.add(buildImport(unlinkedDefiningUnit.imports[i], |
| linkedLibrary.importDependencies[i])); |
| } |
| library.imports = imports; |
| List<ExportElement> exports = <ExportElement>[]; |
| assert(unlinkedDefiningUnit.exports.length == |
| unlinkedDefiningUnit.publicNamespace.exports.length); |
| for (int i = 0; i < unlinkedDefiningUnit.exports.length; i++) { |
| exports.add(buildExport(unlinkedDefiningUnit.publicNamespace.exports[i], |
| unlinkedDefiningUnit.exports[i])); |
| } |
| library.exports = exports; |
| populateUnit(definingCompilationUnit, 0); |
| finishUnit(); |
| for (int i = 0; i < parts.length; i++) { |
| prepareUnit(parts[i], i + 1); |
| populateUnit(parts[i], i + 1); |
| finishUnit(); |
| } |
| BuildLibraryElementUtils.patchTopLevelAccessors(library); |
| // Update delayed Object class references. |
| if (isCoreLibrary) { |
| ClassElement objectElement = library.getType('Object'); |
| assert(objectElement != null); |
| for (ClassElementImpl classElement in delayedObjectSubclasses) { |
| classElement.supertype = objectElement.type; |
| } |
| } |
| // Compute namespaces. |
| library.publicNamespace = |
| new NamespaceBuilder().createPublicNamespaceForLibrary(library); |
| library.exportNamespace = buildExportNamespace( |
| library.publicNamespace, linkedLibrary.exportNames); |
| // Find the entry point. Note: we can't use element.isEntryPoint because |
| // that will trigger resynthesis of exported libraries. |
| Element entryPoint = |
| library.exportNamespace.get(FunctionElement.MAIN_FUNCTION_NAME); |
| if (entryPoint is FunctionElement) { |
| library.entryPoint = entryPoint; |
| } |
| // Create the synthetic element for `loadLibrary`. |
| // Until the client received dart:core and dart:async, we cannot do this, |
| // because the TypeProvider is not fully initialized. So, it is up to the |
| // Dart SDK client to initialize TypeProvider and finish the dart:core and |
| // dart:async libraries creation. |
| if (library.name != 'dart.core' && library.name != 'dart.async') { |
| library.createLoadLibraryFunction(summaryResynthesizer.typeProvider); |
| } |
| // Done. |
| return library; |
| } |
| |
| /** |
| * Build the appropriate [DartType] object corresponding to a slot id in the |
| * [LinkedUnit.types] table. |
| */ |
| DartType buildLinkedType(int slot) { |
| if (slot == 0) { |
| // A slot id of 0 means there is no [DartType] object to build. |
| return null; |
| } |
| EntityRef type = linkedTypeMap[slot]; |
| if (type == null) { |
| // A missing entry in [LinkedUnit.types] means there is no [DartType] |
| // stored in this slot. |
| return null; |
| } |
| return buildType(type); |
| } |
| |
| /** |
| * Resynthesize a [ParameterElement]. |
| */ |
| ParameterElement buildParameter(UnlinkedParam serializedParameter) { |
| ParameterElementImpl parameterElement; |
| if (serializedParameter.isInitializingFormal) { |
| FieldFormalParameterElementImpl initializingParameter; |
| if (serializedParameter.defaultValue != null) { |
| DefaultFieldFormalParameterElementImpl defaultParameter = |
| new DefaultFieldFormalParameterElementImpl( |
| serializedParameter.name, serializedParameter.nameOffset); |
| initializingParameter = defaultParameter; |
| defaultParameter.constantInitializer = |
| _buildConstExpression(serializedParameter.defaultValue); |
| } else { |
| initializingParameter = new FieldFormalParameterElementImpl( |
| serializedParameter.name, serializedParameter.nameOffset); |
| } |
| parameterElement = initializingParameter; |
| initializingParameter.field = fields[serializedParameter.name]; |
| } else { |
| if (serializedParameter.defaultValue != null) { |
| DefaultParameterElementImpl defaultParameter = |
| new DefaultParameterElementImpl( |
| serializedParameter.name, serializedParameter.nameOffset); |
| parameterElement = defaultParameter; |
| defaultParameter.constantInitializer = |
| _buildConstExpression(serializedParameter.defaultValue); |
| } else { |
| parameterElement = new ParameterElementImpl( |
| serializedParameter.name, serializedParameter.nameOffset); |
| } |
| } |
| buildAnnotations(parameterElement, serializedParameter.annotations); |
| if (serializedParameter.isFunctionTyped) { |
| FunctionElementImpl parameterTypeElement = |
| new FunctionElementImpl('', -1); |
| parameterTypeElement.synthetic = true; |
| parameterElement.parameters = |
| serializedParameter.parameters.map(buildParameter).toList(); |
| parameterTypeElement.enclosingElement = parameterElement; |
| parameterTypeElement.shareParameters(parameterElement.parameters); |
| parameterTypeElement.returnType = buildType(serializedParameter.type); |
| parameterElement.type = new FunctionTypeImpl.elementWithNameAndArgs( |
| parameterTypeElement, null, currentTypeArguments, false); |
| } else { |
| if (serializedParameter.isInitializingFormal && |
| serializedParameter.type == null) { |
| // The type is inherited from the matching field. |
| parameterElement.type = fields[serializedParameter.name]?.type ?? |
| summaryResynthesizer.typeProvider.dynamicType; |
| } else { |
| parameterElement.type = |
| buildLinkedType(serializedParameter.inferredTypeSlot) ?? |
| buildType(serializedParameter.type); |
| } |
| parameterElement.hasImplicitType = serializedParameter.type == null; |
| } |
| switch (serializedParameter.kind) { |
| case UnlinkedParamKind.named: |
| parameterElement.parameterKind = ParameterKind.NAMED; |
| break; |
| case UnlinkedParamKind.positional: |
| parameterElement.parameterKind = ParameterKind.POSITIONAL; |
| break; |
| case UnlinkedParamKind.required: |
| parameterElement.parameterKind = ParameterKind.REQUIRED; |
| break; |
| } |
| return parameterElement; |
| } |
| |
| /** |
| * Create, but do not populate, the [CompilationUnitElement] for a part other |
| * than the defining compilation unit. |
| */ |
| CompilationUnitElementImpl buildPart( |
| String uri, UnlinkedPart partDecl, UnlinkedUnit serializedPart) { |
| Source unitSource = |
| summaryResynthesizer.sourceFactory.resolveUri(librarySource, uri); |
| CompilationUnitElementImpl partUnit = |
| new CompilationUnitElementImpl(unitSource.shortName); |
| partUnit.uriOffset = partDecl.uriOffset; |
| partUnit.uriEnd = partDecl.uriEnd; |
| partUnit.source = unitSource; |
| partUnit.librarySource = librarySource; |
| partUnit.uri = uri; |
| buildAnnotations(partUnit, partDecl.annotations); |
| return partUnit; |
| } |
| |
| /** |
| * Build a [DartType] object based on a [EntityRef]. This [DartType] |
| * may refer to elements in other libraries than the library being |
| * deserialized, so handles are used to avoid having to deserialize other |
| * libraries in the process. |
| */ |
| DartType buildType(EntityRef type, {bool defaultVoid: false}) { |
| if (type == null) { |
| if (defaultVoid) { |
| return VoidTypeImpl.instance; |
| } else { |
| return summaryResynthesizer.typeProvider.dynamicType; |
| } |
| } |
| if (type.paramReference != 0) { |
| // TODO(paulberry): make this work for generic methods. |
| return currentTypeParameters[ |
| currentTypeParameters.length - type.paramReference] |
| .type; |
| } else { |
| DartType getTypeArgument(int i) { |
| if (i < type.typeArguments.length) { |
| return buildType(type.typeArguments[i]); |
| } else { |
| return summaryResynthesizer.typeProvider.dynamicType; |
| } |
| } |
| _ReferenceInfo referenceInfo = referenceInfos[type.reference]; |
| return referenceInfo.buildType( |
| getTypeArgument, type.implicitFunctionTypeIndices); |
| } |
| } |
| |
| /** |
| * Resynthesize a [FunctionTypeAliasElement] and place it in the |
| * [unitHolder]. |
| */ |
| void buildTypedef(UnlinkedTypedef serializedTypedef) { |
| try { |
| currentTypeParameters = |
| serializedTypedef.typeParameters.map(buildTypeParameter).toList(); |
| for (int i = 0; i < serializedTypedef.typeParameters.length; i++) { |
| finishTypeParameter( |
| serializedTypedef.typeParameters[i], currentTypeParameters[i]); |
| } |
| FunctionTypeAliasElementImpl functionTypeAliasElement = |
| new FunctionTypeAliasElementImpl( |
| serializedTypedef.name, serializedTypedef.nameOffset); |
| functionTypeAliasElement.parameters = |
| serializedTypedef.parameters.map(buildParameter).toList(); |
| functionTypeAliasElement.returnType = |
| buildType(serializedTypedef.returnType); |
| functionTypeAliasElement.type = |
| new FunctionTypeImpl.forTypedef(functionTypeAliasElement); |
| functionTypeAliasElement.typeParameters = currentTypeParameters; |
| buildDocumentation( |
| functionTypeAliasElement, serializedTypedef.documentationComment); |
| buildAnnotations(functionTypeAliasElement, serializedTypedef.annotations); |
| unitHolder.addTypeAlias(functionTypeAliasElement); |
| } finally { |
| currentTypeParameters = <TypeParameterElement>[]; |
| } |
| } |
| |
| /** |
| * Resynthesize a [TypeParameterElement], handling all parts of its except |
| * its bound. |
| * |
| * The bound is deferred until later since it may refer to other type |
| * parameters that have not been resynthesized yet. To handle the bound, |
| * call [finishTypeParameter]. |
| */ |
| TypeParameterElement buildTypeParameter( |
| UnlinkedTypeParam serializedTypeParameter) { |
| TypeParameterElementImpl typeParameterElement = |
| new TypeParameterElementImpl( |
| serializedTypeParameter.name, serializedTypeParameter.nameOffset); |
| typeParameterElement.type = new TypeParameterTypeImpl(typeParameterElement); |
| buildAnnotations(typeParameterElement, serializedTypeParameter.annotations); |
| return typeParameterElement; |
| } |
| |
| /** |
| * Resynthesize a [TopLevelVariableElement] or [FieldElement]. |
| */ |
| void buildVariable(UnlinkedVariable serializedVariable, |
| [ElementHolder holder]) { |
| if (holder == null) { |
| TopLevelVariableElementImpl element; |
| if (serializedVariable.constExpr != null) { |
| ConstTopLevelVariableElementImpl constElement = |
| new ConstTopLevelVariableElementImpl( |
| serializedVariable.name, serializedVariable.nameOffset); |
| element = constElement; |
| constElement.constantInitializer = |
| _buildConstExpression(serializedVariable.constExpr); |
| } else { |
| element = new TopLevelVariableElementImpl( |
| serializedVariable.name, serializedVariable.nameOffset); |
| } |
| buildVariableCommonParts(element, serializedVariable); |
| unitHolder.addTopLevelVariable(element); |
| buildImplicitAccessors(element, unitHolder); |
| } else { |
| FieldElementImpl element; |
| if (serializedVariable.constExpr != null) { |
| ConstFieldElementImpl constElement = new ConstFieldElementImpl( |
| serializedVariable.name, serializedVariable.nameOffset); |
| element = constElement; |
| constElement.constantInitializer = |
| _buildConstExpression(serializedVariable.constExpr); |
| } else { |
| element = new FieldElementImpl( |
| serializedVariable.name, serializedVariable.nameOffset); |
| } |
| buildVariableCommonParts(element, serializedVariable); |
| element.static = serializedVariable.isStatic; |
| holder.addField(element); |
| buildImplicitAccessors(element, holder); |
| fields[element.name] = element; |
| } |
| } |
| |
| /** |
| * Handle the parts that are common to top level variables and fields. |
| */ |
| void buildVariableCommonParts(PropertyInducingElementImpl element, |
| UnlinkedVariable serializedVariable) { |
| element.type = buildLinkedType(serializedVariable.inferredTypeSlot) ?? |
| buildType(serializedVariable.type); |
| element.const3 = serializedVariable.isConst; |
| element.final2 = serializedVariable.isFinal; |
| element.hasImplicitType = serializedVariable.type == null; |
| element.propagatedType = |
| buildLinkedType(serializedVariable.propagatedTypeSlot); |
| buildDocumentation(element, serializedVariable.documentationComment); |
| buildAnnotations(element, serializedVariable.annotations); |
| } |
| |
| /** |
| * Finish creating a [TypeParameterElement] by deserializing its bound. |
| */ |
| void finishTypeParameter(UnlinkedTypeParam serializedTypeParameter, |
| TypeParameterElementImpl typeParameterElement) { |
| if (serializedTypeParameter.bound != null) { |
| typeParameterElement.bound = buildType(serializedTypeParameter.bound); |
| } |
| } |
| |
| /** |
| * Tear down data structures used during deserialization of a compilation |
| * unit. |
| */ |
| void finishUnit() { |
| unitHolder = null; |
| linkedUnit = null; |
| unlinkedUnit = null; |
| linkedTypeMap = null; |
| referenceInfos = null; |
| currentCompilationUnit = null; |
| } |
| |
| /** |
| * Build the components of an [ElementLocationImpl] for the entity in the |
| * given [unit] of the dependency located at [dependencyIndex], and having |
| * the given [name]. |
| */ |
| List<String> getReferencedLocationComponents( |
| int dependencyIndex, int unit, String name) { |
| if (dependencyIndex == 0) { |
| String referencedLibraryUri = librarySource.uri.toString(); |
| String partUri; |
| if (unit != 0) { |
| String uri = unlinkedUnits[0].publicNamespace.parts[unit - 1]; |
| Source partSource = |
| summaryResynthesizer.sourceFactory.resolveUri(librarySource, uri); |
| partUri = partSource.uri.toString(); |
| } else { |
| partUri = referencedLibraryUri; |
| } |
| return <String>[referencedLibraryUri, partUri, name]; |
| } |
| LinkedDependency dependency = linkedLibrary.dependencies[dependencyIndex]; |
| Source referencedLibrarySource = summaryResynthesizer.sourceFactory |
| .resolveUri(librarySource, dependency.uri); |
| String referencedLibraryUri = referencedLibrarySource.uri.toString(); |
| String partUri; |
| if (unit != 0) { |
| String uri = dependency.parts[unit - 1]; |
| Source partSource = summaryResynthesizer.sourceFactory |
| .resolveUri(referencedLibrarySource, uri); |
| partUri = partSource.uri.toString(); |
| } else { |
| partUri = referencedLibraryUri; |
| } |
| return <String>[referencedLibraryUri, partUri, name]; |
| } |
| |
| /** |
| * Populate [referenceInfos] with the correct information for the current |
| * compilation unit. |
| */ |
| void populateReferenceInfos() { |
| int numLinkedReferences = linkedUnit.references.length; |
| int numUnlinkedReferences = unlinkedUnit.references.length; |
| referenceInfos = new List<_ReferenceInfo>(numLinkedReferences); |
| for (int i = 0; i < numLinkedReferences; i++) { |
| LinkedReference linkedReference = linkedUnit.references[i]; |
| _ReferenceInfo enclosingInfo = null; |
| String name; |
| int containingReference; |
| if (i < numUnlinkedReferences) { |
| name = unlinkedUnit.references[i].name; |
| containingReference = unlinkedUnit.references[i].prefixReference; |
| } else { |
| name = linkedUnit.references[i].name; |
| containingReference = linkedUnit.references[i].containingReference; |
| } |
| Element element; |
| DartType type; |
| int numTypeParameters = linkedReference.numTypeParameters; |
| if (linkedReference.kind == ReferenceKind.unresolved) { |
| type = summaryResynthesizer.typeProvider.undefinedType; |
| element = type.element; |
| } else if (name == 'dynamic') { |
| type = summaryResynthesizer.typeProvider.dynamicType; |
| element = type.element; |
| } else if (name == 'void') { |
| type = VoidTypeImpl.instance; |
| element = type.element; |
| } else { |
| List<String> locationComponents; |
| if (containingReference != 0 && |
| referenceInfos[containingReference].element is ClassElement) { |
| String identifier = _getElementIdentifier(name, linkedReference.kind); |
| enclosingInfo = referenceInfos[containingReference]; |
| locationComponents = |
| enclosingInfo.element.location.components.toList(); |
| locationComponents.add(identifier); |
| } else { |
| String identifier = _getElementIdentifier(name, linkedReference.kind); |
| locationComponents = getReferencedLocationComponents( |
| linkedReference.dependency, linkedReference.unit, identifier); |
| } |
| ElementLocation location = |
| new ElementLocationImpl.con3(locationComponents); |
| switch (linkedReference.kind) { |
| case ReferenceKind.classOrEnum: |
| element = new ClassElementHandle(summaryResynthesizer, location); |
| break; |
| case ReferenceKind.constructor: |
| assert(location.components.length == 4); |
| element = |
| new ConstructorElementHandle(summaryResynthesizer, location); |
| numTypeParameters = enclosingInfo.numTypeParameters; |
| break; |
| case ReferenceKind.length: |
| element = _buildStringLengthPropertyAccessorElement(); |
| break; |
| case ReferenceKind.method: |
| assert(location.components.length == 4); |
| element = new MethodElementHandle(summaryResynthesizer, location); |
| break; |
| case ReferenceKind.propertyAccessor: |
| assert(location.components.length == 4); |
| element = new PropertyAccessorElementHandle( |
| summaryResynthesizer, location); |
| break; |
| case ReferenceKind.topLevelFunction: |
| assert(location.components.length == 3); |
| element = new FunctionElementHandle(summaryResynthesizer, location); |
| break; |
| case ReferenceKind.topLevelPropertyAccessor: |
| element = new PropertyAccessorElementHandle( |
| summaryResynthesizer, location); |
| break; |
| case ReferenceKind.typedef: |
| element = new FunctionTypeAliasElementHandle( |
| summaryResynthesizer, location); |
| break; |
| case ReferenceKind.prefix: |
| case ReferenceKind.unresolved: |
| break; |
| } |
| } |
| referenceInfos[i] = new _ReferenceInfo( |
| enclosingInfo, name, element, type, numTypeParameters); |
| } |
| } |
| |
| /** |
| * Populate a [CompilationUnitElement] by deserializing all the elements |
| * contained in it. |
| */ |
| void populateUnit(CompilationUnitElementImpl unit, int unitNum) { |
| unlinkedUnit.classes.forEach(buildClass); |
| unlinkedUnit.enums.forEach(buildEnum); |
| unlinkedUnit.executables.forEach(buildExecutable); |
| unlinkedUnit.typedefs.forEach(buildTypedef); |
| unlinkedUnit.variables.forEach(buildVariable); |
| String absoluteUri = unit.source.uri.toString(); |
| unit.accessors = unitHolder.accessors; |
| unit.enums = unitHolder.enums; |
| unit.functions = unitHolder.functions; |
| List<FunctionTypeAliasElement> typeAliases = unitHolder.typeAliases; |
| for (FunctionTypeAliasElementImpl typeAlias in typeAliases) { |
| if (typeAlias.isSynthetic) { |
| typeAlias.enclosingElement = unit; |
| } |
| } |
| unit.typeAliases = typeAliases.where((e) => !e.isSynthetic).toList(); |
| unit.types = unitHolder.types; |
| unit.topLevelVariables = unitHolder.topLevelVariables; |
| Map<String, Element> elementMap = <String, Element>{}; |
| for (ClassElement cls in unit.types) { |
| elementMap[cls.name] = cls; |
| } |
| for (ClassElement cls in unit.enums) { |
| elementMap[cls.name] = cls; |
| } |
| for (FunctionTypeAliasElement typeAlias in unit.functionTypeAliases) { |
| elementMap[typeAlias.name] = typeAlias; |
| } |
| for (FunctionElement function in unit.functions) { |
| elementMap[function.name] = function; |
| } |
| for (PropertyAccessorElementImpl accessor in unit.accessors) { |
| elementMap[accessor.identifier] = accessor; |
| } |
| resummarizedElements[absoluteUri] = elementMap; |
| } |
| |
| /** |
| * Set up data structures for deserializing a compilation unit. |
| */ |
| void prepareUnit(CompilationUnitElementImpl unit, int unitNum) { |
| linkedUnit = linkedLibrary.units[unitNum]; |
| unlinkedUnit = unlinkedUnits[unitNum]; |
| linkedTypeMap = <int, EntityRef>{}; |
| currentCompilationUnit = unit; |
| for (EntityRef t in linkedUnit.types) { |
| linkedTypeMap[t.slot] = t; |
| } |
| populateReferenceInfos(); |
| unitHolder = new ElementHolder(); |
| } |
| |
| /** |
| * Constructor initializers can reference fields and other constructors of |
| * the same class, including forward references. So, we need to delay |
| * resolution until after class elements are built. |
| */ |
| void resolveConstructorInitializers(ClassElementImpl classElement) { |
| for (ConstructorElementImpl constructor in constructors.values) { |
| for (ConstructorInitializer initializer |
| in constructor.constantInitializers) { |
| if (initializer is ConstructorFieldInitializer) { |
| SimpleIdentifier nameNode = initializer.fieldName; |
| nameNode.staticElement = fields[nameNode.name]; |
| } else if (initializer is SuperConstructorInvocation) { |
| SimpleIdentifier nameNode = initializer.constructorName; |
| ConstructorElement element = new _DeferredConstructorElement( |
| classElement.supertype, nameNode?.name ?? ''); |
| initializer.staticElement = element; |
| nameNode?.staticElement = element; |
| } else if (initializer is RedirectingConstructorInvocation) { |
| SimpleIdentifier nameNode = initializer.constructorName; |
| ConstructorElement element = constructors[nameNode?.name ?? '']; |
| initializer.staticElement = element; |
| nameNode?.staticElement = element; |
| } |
| } |
| } |
| } |
| |
| Expression _buildConstExpression(UnlinkedConst uc) { |
| return new _ConstExprBuilder(this, uc).build(); |
| } |
| |
| /** |
| * Return the new handle of the `String.length` getter element. |
| */ |
| PropertyAccessorElementHandle _buildStringLengthPropertyAccessorElement() => |
| new PropertyAccessorElementHandle( |
| summaryResynthesizer, |
| new ElementLocationImpl.con3( |
| <String>['dart:core', 'dart:core', 'String', 'length?'])); |
| |
| /** |
| * If the given [kind] is a top-level or class member property accessor, and |
| * the given [name] does not end with `=`, i.e. does not denote a setter, |
| * return the getter identifier by appending `?`. |
| */ |
| static String _getElementIdentifier(String name, ReferenceKind kind) { |
| if (kind == ReferenceKind.topLevelPropertyAccessor || |
| kind == ReferenceKind.propertyAccessor) { |
| if (!name.endsWith('=')) { |
| return name + '?'; |
| } |
| } |
| return name; |
| } |
| } |
| |
| /** |
| * Data structure used during resynthesis to record all the information that is |
| * known about how to resynthesize a single entry in [LinkedUnit.references] |
| * (and its associated entry in [UnlinkedUnit.references], if it exists). |
| */ |
| class _ReferenceInfo { |
| /** |
| * The enclosing [_ReferenceInfo], or `null` for top-level elements. |
| */ |
| final _ReferenceInfo enclosing; |
| |
| /** |
| * The name of the entity referred to by this reference. |
| */ |
| final String name; |
| |
| /** |
| * The element referred to by this reference, or `null` if there is no |
| * associated element (e.g. because it is a reference to an undefined |
| * entity). |
| */ |
| final Element element; |
| |
| /** |
| * If this reference refers to a non-generic type, the type it refers to. |
| * Otherwise `null`. |
| */ |
| DartType type; |
| |
| /** |
| * The number of type parameters accepted by the entity referred to by this |
| * reference, or zero if it doesn't accept any type parameters. |
| */ |
| final int numTypeParameters; |
| |
| /** |
| * Create a new [_ReferenceInfo] object referring to an element called [name] |
| * via the element handle [element], and having [numTypeParameters] type |
| * parameters. |
| * |
| * For the special types `dynamic` and `void`, [specialType] should point to |
| * the type itself. Otherwise, pass `null` and the type will be computed |
| * when appropriate. |
| */ |
| _ReferenceInfo(this.enclosing, this.name, this.element, DartType specialType, |
| this.numTypeParameters) { |
| if (specialType != null) { |
| type = specialType; |
| } else { |
| type = _buildType((_) => DynamicTypeImpl.instance, null); |
| } |
| } |
| |
| /** |
| * Build a [DartType] corresponding to the result of applying some type |
| * arguments to the entity referred to by this [_ReferenceInfo]. The type |
| * arguments are retrieved by calling [getTypeArgument]. |
| * |
| * If [implicitFunctionTypeIndices] is not empty, a [DartType] should be |
| * created which refers to a function type implicitly defined by one of the |
| * element's parameters. [implicitFunctionTypeIndices] is interpreted as in |
| * [EntityRef.implicitFunctionTypeIndices]. |
| * |
| * If the entity referred to by this [_ReferenceInfo] is not a type, `null` |
| * is returned. |
| */ |
| DartType buildType( |
| DartType getTypeArgument(int i), List<int> implicitFunctionTypeIndices) { |
| DartType result = |
| (numTypeParameters == 0 && implicitFunctionTypeIndices.isEmpty) |
| ? type |
| : _buildType(getTypeArgument, implicitFunctionTypeIndices); |
| if (result == null) { |
| // TODO(paulberry): figure out how to handle this case (which should |
| // only occur in the event of erroneous code). |
| throw new UnimplementedError(); |
| } |
| return result; |
| } |
| |
| /** |
| * If this reference refers to a type, build a [DartType] which instantiates |
| * it with type arguments returned by [getTypeArgument]. Otherwise return |
| * `null`. |
| * |
| * If [implicitFunctionTypeIndices] is not null, a [DartType] should be |
| * created which refers to a function type implicitly defined by one of the |
| * element's parameters. [implicitFunctionTypeIndices] is interpreted as in |
| * [EntityRef.implicitFunctionTypeIndices]. |
| */ |
| DartType _buildType( |
| DartType getTypeArgument(int i), List<int> implicitFunctionTypeIndices) { |
| List<DartType> typeArguments = const <DartType>[]; |
| if (numTypeParameters != 0) { |
| typeArguments = <DartType>[]; |
| for (int i = 0; i < numTypeParameters; i++) { |
| typeArguments.add(getTypeArgument(i)); |
| } |
| } |
| ElementHandle element = this.element; // To allow type promotion |
| if (element is ClassElementHandle) { |
| return new InterfaceTypeImpl.elementWithNameAndArgs( |
| element, name, typeArguments); |
| } else if (element is FunctionTypeAliasElementHandle) { |
| return new FunctionTypeImpl.elementWithNameAndArgs( |
| element, name, typeArguments, typeArguments.isNotEmpty); |
| } else if (element is FunctionTypedElement) { |
| FunctionTypedElementComputer computer = |
| implicitFunctionTypeIndices != null |
| ? () { |
| FunctionTypedElement element = this.element; |
| for (int index in implicitFunctionTypeIndices) { |
| element = element.parameters[index].type.element; |
| } |
| return element; |
| } |
| : () => this.element; |
| // TODO(paulberry): Is it a bug that we have to pass `false` for |
| // isInstantiated? |
| return new DeferredFunctionTypeImpl(computer, null, typeArguments, false); |
| } else { |
| return null; |
| } |
| } |
| } |
