| // Copyright (c) 2016, 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 fasta.source_class_builder; |
| |
| import 'package:kernel/ast.dart' |
| show |
| Class, |
| Constructor, |
| Expression, |
| ListLiteral, |
| Member, |
| StaticGet, |
| Supertype, |
| TreeNode, |
| DartType, |
| DynamicType, |
| Field, |
| FunctionNode, |
| Name, |
| Procedure, |
| ProcedureKind, |
| TypeParameter, |
| VariableDeclaration, |
| Variance, |
| VoidType; |
| |
| import 'package:kernel/class_hierarchy.dart' show ClassHierarchy; |
| |
| import 'package:kernel/clone.dart' show CloneProcedureWithoutBody; |
| |
| import 'package:kernel/reference_from_index.dart' show IndexedClass; |
| |
| import 'package:kernel/type_algebra.dart' show Substitution; |
| |
| import 'package:kernel/type_algebra.dart' as type_algebra |
| show getSubstitutionMap; |
| |
| import 'package:kernel/type_environment.dart'; |
| |
| import '../builder/builder.dart'; |
| |
| import '../builder/class_builder.dart'; |
| |
| import '../builder/constructor_reference_builder.dart'; |
| |
| import '../builder/function_builder.dart'; |
| |
| import '../builder/invalid_type_declaration_builder.dart'; |
| |
| import '../builder/library_builder.dart'; |
| |
| import '../builder/member_builder.dart'; |
| |
| import '../builder/metadata_builder.dart'; |
| |
| import '../builder/named_type_builder.dart'; |
| |
| import '../builder/nullability_builder.dart'; |
| |
| import '../builder/procedure_builder.dart'; |
| |
| import '../builder/type_alias_builder.dart'; |
| |
| import '../builder/type_builder.dart'; |
| |
| import '../builder/type_declaration_builder.dart'; |
| |
| import '../builder/type_variable_builder.dart'; |
| |
| import '../dill/dill_member_builder.dart' show DillMemberBuilder; |
| |
| import '../fasta_codes.dart' |
| show |
| Message, |
| noLength, |
| templateConflictsWithConstructor, |
| templateConflictsWithFactory, |
| templateConflictsWithMember, |
| templateConflictsWithSetter, |
| templateDuplicatedDeclarationUse, |
| templateInvalidTypeVariableInSupertype, |
| templateInvalidTypeVariableInSupertypeWithVariance, |
| templateRedirectionTargetNotFound, |
| templateSupertypeIsIllegal; |
| |
| import '../kernel/redirecting_factory_body.dart' show redirectingName; |
| |
| import '../kernel/kernel_builder.dart' show compareProcedures; |
| |
| import '../kernel/kernel_target.dart' show KernelTarget; |
| |
| import '../kernel/redirecting_factory_body.dart' show RedirectingFactoryBody; |
| |
| import '../kernel/type_algorithms.dart' show Variance, computeVariance; |
| |
| import '../names.dart' show noSuchMethodName; |
| |
| import '../problems.dart' show unexpected, unhandled; |
| |
| import '../scope.dart'; |
| |
| import 'source_library_builder.dart' show SourceLibraryBuilder; |
| |
| Class initializeClass( |
| Class cls, |
| List<TypeVariableBuilder> typeVariables, |
| String name, |
| SourceLibraryBuilder parent, |
| int startCharOffset, |
| int charOffset, |
| int charEndOffset, |
| Class referencesFrom) { |
| cls ??= new Class( |
| name: name, |
| typeParameters: |
| TypeVariableBuilder.typeParametersFromBuilders(typeVariables), |
| reference: referencesFrom?.reference); |
| cls.fileUri ??= parent.fileUri; |
| if (cls.startFileOffset == TreeNode.noOffset) { |
| cls.startFileOffset = startCharOffset; |
| } |
| if (cls.fileOffset == TreeNode.noOffset) { |
| cls.fileOffset = charOffset; |
| } |
| if (cls.fileEndOffset == TreeNode.noOffset) { |
| cls.fileEndOffset = charEndOffset; |
| } |
| |
| return cls; |
| } |
| |
| class SourceClassBuilder extends ClassBuilderImpl |
| implements Comparable<SourceClassBuilder> { |
| @override |
| final Class actualCls; |
| |
| final List<ConstructorReferenceBuilder> constructorReferences; |
| |
| TypeBuilder mixedInType; |
| |
| bool isMixinDeclaration; |
| |
| final Class referencesFrom; |
| final IndexedClass referencesFromIndexed; |
| |
| SourceClassBuilder( |
| List<MetadataBuilder> metadata, |
| int modifiers, |
| String name, |
| List<TypeVariableBuilder> typeVariables, |
| TypeBuilder supertype, |
| List<TypeBuilder> interfaces, |
| List<TypeBuilder> onTypes, |
| Scope scope, |
| ConstructorScope constructors, |
| LibraryBuilder parent, |
| this.constructorReferences, |
| int startCharOffset, |
| int nameOffset, |
| int charEndOffset, |
| Class referencesFrom, |
| IndexedClass referencesFromIndexed, { |
| Class cls, |
| this.mixedInType, |
| this.isMixinDeclaration = false, |
| }) : actualCls = initializeClass(cls, typeVariables, name, parent, |
| startCharOffset, nameOffset, charEndOffset, referencesFrom), |
| referencesFrom = referencesFrom, |
| referencesFromIndexed = referencesFromIndexed, |
| super(metadata, modifiers, name, typeVariables, supertype, interfaces, |
| onTypes, scope, constructors, parent, nameOffset) { |
| actualCls.hasConstConstructor = hasConstConstructor; |
| } |
| |
| @override |
| Class get cls => origin.actualCls; |
| |
| @override |
| SourceLibraryBuilder get library => super.library; |
| |
| Class build(SourceLibraryBuilder library, LibraryBuilder coreLibrary) { |
| void buildBuilders(String name, Builder declaration) { |
| do { |
| if (declaration.parent != this) { |
| if (fileUri != declaration.parent.fileUri) { |
| unexpected("$fileUri", "${declaration.parent.fileUri}", charOffset, |
| fileUri); |
| } else { |
| unexpected(fullNameForErrors, declaration.parent?.fullNameForErrors, |
| charOffset, fileUri); |
| } |
| } else if (declaration is MemberBuilderImpl) { |
| MemberBuilderImpl memberBuilder = declaration; |
| memberBuilder.buildMembers(library, |
| (Member member, BuiltMemberKind memberKind) { |
| member.parent = cls; |
| if (!memberBuilder.isPatch && !memberBuilder.isDuplicate) { |
| cls.addMember(member); |
| } |
| }); |
| } else { |
| unhandled("${declaration.runtimeType}", "buildBuilders", |
| declaration.charOffset, declaration.fileUri); |
| } |
| declaration = declaration.next; |
| } while (declaration != null); |
| } |
| |
| scope.forEach(buildBuilders); |
| constructors.forEach(buildBuilders); |
| supertype = checkSupertype(supertype); |
| actualCls.supertype = |
| supertype?.buildSupertype(library, charOffset, fileUri); |
| if (!isMixinDeclaration && |
| actualCls.supertype != null && |
| actualCls.superclass.isMixinDeclaration) { |
| // Declared mixins have interfaces that can be implemented, but they |
| // cannot be extended. However, a mixin declaration with a single |
| // superclass constraint is encoded with the constraint as the supertype, |
| // and that is allowed to be a mixin's interface. |
| library.addProblem( |
| templateSupertypeIsIllegal.withArguments(actualCls.superclass.name), |
| charOffset, |
| noLength, |
| fileUri); |
| actualCls.supertype = null; |
| } |
| if (actualCls.supertype == null && supertype is! NamedTypeBuilder) { |
| supertype = null; |
| } |
| mixedInType = checkSupertype(mixedInType); |
| actualCls.mixedInType = |
| mixedInType?.buildMixedInType(library, charOffset, fileUri); |
| if (actualCls.mixedInType == null && mixedInType is! NamedTypeBuilder) { |
| mixedInType = null; |
| } |
| actualCls.isMixinDeclaration = isMixinDeclaration; |
| // TODO(ahe): If `cls.supertype` is null, and this isn't Object, report a |
| // compile-time error. |
| cls.isAbstract = isAbstract; |
| if (interfaces != null) { |
| for (int i = 0; i < interfaces.length; ++i) { |
| interfaces[i] = checkSupertype(interfaces[i]); |
| Supertype supertype = |
| interfaces[i].buildSupertype(library, charOffset, fileUri); |
| if (supertype != null) { |
| // TODO(ahe): Report an error if supertype is null. |
| actualCls.implementedTypes.add(supertype); |
| } |
| } |
| } |
| |
| constructors.forEach((String name, Builder constructor) { |
| Builder member = scopeBuilder[name]; |
| if (member == null) return; |
| if (!member.isStatic) return; |
| // TODO(ahe): Revisit these messages. It seems like the last two should |
| // be `context` parameter to this message. |
| addProblem(templateConflictsWithMember.withArguments(name), |
| constructor.charOffset, noLength); |
| if (constructor.isFactory) { |
| addProblem( |
| templateConflictsWithFactory.withArguments("${this.name}.${name}"), |
| member.charOffset, |
| noLength); |
| } else { |
| addProblem( |
| templateConflictsWithConstructor |
| .withArguments("${this.name}.${name}"), |
| member.charOffset, |
| noLength); |
| } |
| }); |
| |
| scope.forEachLocalSetter((String name, Builder setter) { |
| Builder member = scopeBuilder[name]; |
| if (member == null || |
| !(member.isField && !member.isFinal && !member.isConst || |
| member.isRegularMethod && member.isStatic && setter.isStatic)) { |
| return; |
| } |
| addProblem(templateConflictsWithMember.withArguments(name), |
| setter.charOffset, noLength); |
| // TODO(ahe): Context argument to previous message? |
| addProblem(templateConflictsWithSetter.withArguments(name), |
| member.charOffset, noLength); |
| }); |
| |
| scope.forEachLocalSetter((String name, Builder setter) { |
| Builder constructor = constructorScopeBuilder[name]; |
| if (constructor == null || !setter.isStatic) return; |
| addProblem(templateConflictsWithConstructor.withArguments(name), |
| setter.charOffset, noLength); |
| addProblem(templateConflictsWithSetter.withArguments(name), |
| constructor.charOffset, noLength); |
| }); |
| |
| cls.procedures.sort(compareProcedures); |
| return cls; |
| } |
| |
| TypeBuilder checkSupertype(TypeBuilder supertype) { |
| if (typeVariables == null || supertype == null) return supertype; |
| Message message; |
| for (int i = 0; i < typeVariables.length; ++i) { |
| int variance = computeVariance(typeVariables[i], supertype, library); |
| if (!Variance.greaterThanOrEqual(variance, typeVariables[i].variance)) { |
| if (typeVariables[i].parameter.isLegacyCovariant) { |
| message = templateInvalidTypeVariableInSupertype.withArguments( |
| typeVariables[i].name, |
| Variance.keywordString(variance), |
| supertype.name); |
| } else { |
| message = |
| templateInvalidTypeVariableInSupertypeWithVariance.withArguments( |
| Variance.keywordString(typeVariables[i].variance), |
| typeVariables[i].name, |
| Variance.keywordString(variance), |
| supertype.name); |
| } |
| library.addProblem(message, charOffset, noLength, fileUri); |
| } |
| } |
| if (message != null) { |
| return new NamedTypeBuilder( |
| supertype.name, const NullabilityBuilder.omitted(), null) |
| ..bind(new InvalidTypeDeclarationBuilder(supertype.name, |
| message.withLocation(fileUri, charOffset, noLength))); |
| } |
| return supertype; |
| } |
| |
| void addSyntheticConstructor(Constructor constructor) { |
| String name = constructor.name.name; |
| cls.constructors.add(constructor); |
| constructor.parent = cls; |
| DillMemberBuilder memberBuilder = new DillMemberBuilder(constructor, this); |
| memberBuilder.next = constructorScopeBuilder[name]; |
| constructorScopeBuilder.addMember(name, memberBuilder); |
| } |
| |
| @override |
| int finishPatch() { |
| if (!isPatch) return 0; |
| |
| // TODO(ahe): restore file-offset once we track both origin and patch file |
| // URIs. See https://github.com/dart-lang/sdk/issues/31579 |
| cls.annotations.forEach((m) => m.fileOffset = origin.cls.fileOffset); |
| |
| int count = 0; |
| scope.forEach((String name, Builder declaration) { |
| count += declaration.finishPatch(); |
| }); |
| constructors.forEach((String name, Builder declaration) { |
| count += declaration.finishPatch(); |
| }); |
| return count; |
| } |
| |
| List<Builder> computeDirectSupertypes(ClassBuilder objectClass) { |
| final List<Builder> result = <Builder>[]; |
| final TypeBuilder supertype = this.supertype; |
| if (supertype != null) { |
| TypeDeclarationBuilder declarationBuilder = supertype.declaration; |
| if (declarationBuilder is TypeAliasBuilder) { |
| TypeAliasBuilder aliasBuilder = declarationBuilder; |
| declarationBuilder = aliasBuilder.unaliasDeclaration; |
| } |
| result.add(declarationBuilder); |
| } else if (objectClass != this) { |
| result.add(objectClass); |
| } |
| final List<TypeBuilder> interfaces = this.interfaces; |
| if (interfaces != null) { |
| for (int i = 0; i < interfaces.length; i++) { |
| TypeBuilder interface = interfaces[i]; |
| TypeDeclarationBuilder declarationBuilder = interface.declaration; |
| if (declarationBuilder is TypeAliasBuilder) { |
| TypeAliasBuilder aliasBuilder = declarationBuilder; |
| declarationBuilder = aliasBuilder.unaliasDeclaration; |
| } |
| result.add(declarationBuilder); |
| } |
| } |
| final TypeBuilder mixedInType = this.mixedInType; |
| if (mixedInType != null) { |
| TypeDeclarationBuilder declarationBuilder = mixedInType.declaration; |
| if (declarationBuilder is TypeAliasBuilder) { |
| TypeAliasBuilder aliasBuilder = declarationBuilder; |
| declarationBuilder = aliasBuilder.unaliasDeclaration; |
| } |
| result.add(declarationBuilder); |
| } |
| return result; |
| } |
| |
| @override |
| int compareTo(SourceClassBuilder other) { |
| int result = "$fileUri".compareTo("${other.fileUri}"); |
| if (result != 0) return result; |
| return charOffset.compareTo(other.charOffset); |
| } |
| |
| void addNoSuchMethodForwarderForProcedure(Member noSuchMethod, |
| KernelTarget target, Procedure procedure, ClassHierarchy hierarchy) { |
| Procedure referenceFrom; |
| if (referencesFromIndexed != null) { |
| if (procedure.isSetter) { |
| referenceFrom = |
| referencesFromIndexed.lookupProcedureSetter(procedure.name.name); |
| } else { |
| referenceFrom = |
| referencesFromIndexed.lookupProcedureNotSetter(procedure.name.name); |
| } |
| } |
| |
| CloneProcedureWithoutBody cloner = new CloneProcedureWithoutBody( |
| typeSubstitution: type_algebra.getSubstitutionMap( |
| hierarchy.getClassAsInstanceOf(cls, procedure.enclosingClass)), |
| cloneAnnotations: false); |
| Procedure cloned = cloner.cloneProcedure(procedure, referenceFrom) |
| ..isExternal = false; |
| transformProcedureToNoSuchMethodForwarder(noSuchMethod, target, cloned); |
| cls.procedures.add(cloned); |
| cloned.parent = cls; |
| |
| library.forwardersOrigins.add(cloned); |
| library.forwardersOrigins.add(procedure); |
| } |
| |
| void addNoSuchMethodForwarderGetterForField( |
| Field field, Member noSuchMethod, KernelTarget target) { |
| ClassHierarchy hierarchy = target.loader.hierarchy; |
| Substitution substitution = Substitution.fromSupertype( |
| hierarchy.getClassAsInstanceOf(cls, field.enclosingClass)); |
| |
| Procedure referenceFrom; |
| if (referencesFromIndexed != null) { |
| referenceFrom = |
| referencesFromIndexed.lookupProcedureNotSetter(field.name.name); |
| } |
| Procedure getter = new Procedure( |
| field.name, |
| ProcedureKind.Getter, |
| new FunctionNode(null, |
| typeParameters: <TypeParameter>[], |
| positionalParameters: <VariableDeclaration>[], |
| namedParameters: <VariableDeclaration>[], |
| requiredParameterCount: 0, |
| returnType: substitution.substituteType(field.type)), |
| fileUri: field.fileUri, |
| reference: referenceFrom?.reference) |
| ..fileOffset = field.fileOffset |
| ..isNonNullableByDefault = cls.enclosingLibrary.isNonNullableByDefault; |
| transformProcedureToNoSuchMethodForwarder(noSuchMethod, target, getter); |
| cls.procedures.add(getter); |
| getter.parent = cls; |
| } |
| |
| void addNoSuchMethodForwarderSetterForField( |
| Field field, Member noSuchMethod, KernelTarget target) { |
| ClassHierarchy hierarchy = target.loader.hierarchy; |
| Substitution substitution = Substitution.fromSupertype( |
| hierarchy.getClassAsInstanceOf(cls, field.enclosingClass)); |
| |
| Procedure referenceFrom; |
| if (referencesFromIndexed != null) { |
| referenceFrom = |
| referencesFromIndexed.lookupProcedureSetter(field.name.name); |
| } |
| |
| Procedure setter = new Procedure( |
| field.name, |
| ProcedureKind.Setter, |
| new FunctionNode(null, |
| typeParameters: <TypeParameter>[], |
| positionalParameters: <VariableDeclaration>[ |
| new VariableDeclaration("value", |
| type: substitution.substituteType(field.type)) |
| ], |
| namedParameters: <VariableDeclaration>[], |
| requiredParameterCount: 1, |
| returnType: const VoidType()), |
| fileUri: field.fileUri, |
| reference: referenceFrom?.reference) |
| ..fileOffset = field.fileOffset |
| ..isNonNullableByDefault = cls.enclosingLibrary.isNonNullableByDefault; |
| transformProcedureToNoSuchMethodForwarder(noSuchMethod, target, setter); |
| cls.procedures.add(setter); |
| setter.parent = cls; |
| } |
| |
| bool _addMissingNoSuchMethodForwarders( |
| KernelTarget target, Set<Member> existingForwarders, |
| {bool forSetters}) { |
| assert(forSetters != null); |
| |
| ClassHierarchy hierarchy = target.loader.hierarchy; |
| TypeEnvironment typeEnvironment = |
| target.loader.typeInferenceEngine.typeSchemaEnvironment; |
| |
| List<Member> allMembers = |
| hierarchy.getInterfaceMembers(cls, setters: forSetters); |
| List<Member> concreteMembers = |
| hierarchy.getDispatchTargets(cls, setters: forSetters); |
| List<Member> declaredMembers = |
| hierarchy.getDeclaredMembers(cls, setters: forSetters); |
| |
| Member noSuchMethod = ClassHierarchy.findMemberByName( |
| hierarchy.getInterfaceMembers(cls), noSuchMethodName); |
| bool clsHasUserDefinedNoSuchMethod = |
| hasUserDefinedNoSuchMethod(cls, hierarchy, target.objectClass); |
| |
| bool changed = false; |
| |
| // It's possible to have multiple abstract members with the same name -- as |
| // long as there's one with function type that's a subtype of function types |
| // of all other members. Such member is called "best" in the code below. |
| // Members with the same name are put into groups, and "best" is searched |
| // for in each group. |
| Map<Name, List<Member>> sameNameMembers = {}; |
| for (Member member in allMembers) { |
| (sameNameMembers[member.name] ??= []).add(member); |
| } |
| for (Name name in sameNameMembers.keys) { |
| List<Member> members = sameNameMembers[name]; |
| assert(members.isNotEmpty); |
| List<DartType> memberTypes = []; |
| |
| // The most specific member has the type that is subtype of the types of |
| // all other members. |
| Member bestSoFar = members.first; |
| DartType bestSoFarType = |
| forSetters ? bestSoFar.setterType : bestSoFar.getterType; |
| bestSoFarType = Substitution.fromSupertype( |
| hierarchy.getClassAsInstanceOf(cls, bestSoFar.enclosingClass)) |
| .substituteType(bestSoFarType); |
| for (int i = 1; i < members.length; ++i) { |
| Member candidate = members[i]; |
| DartType candidateType = |
| forSetters ? candidate.setterType : candidate.getterType; |
| Substitution substitution = Substitution.fromSupertype( |
| hierarchy.getClassAsInstanceOf(cls, candidate.enclosingClass)); |
| candidateType = substitution.substituteType(candidateType); |
| memberTypes.add(candidateType); |
| bool isMoreSpecific = forSetters |
| ? typeEnvironment.isSubtypeOf(bestSoFarType, candidateType, |
| SubtypeCheckMode.withNullabilities) |
| : typeEnvironment.isSubtypeOf(candidateType, bestSoFarType, |
| SubtypeCheckMode.withNullabilities); |
| if (isMoreSpecific) { |
| bestSoFar = candidate; |
| bestSoFarType = candidateType; |
| } |
| } |
| // Since isSubtypeOf isn't a linear order on types, we need to check once |
| // again that the found member is indeed the most specific one. |
| bool isActuallyBestSoFar = true; |
| for (DartType memberType in memberTypes) { |
| bool isMoreSpecific = forSetters |
| ? typeEnvironment.isSubtypeOf( |
| memberType, bestSoFarType, SubtypeCheckMode.withNullabilities) |
| : typeEnvironment.isSubtypeOf( |
| bestSoFarType, memberType, SubtypeCheckMode.withNullabilities); |
| if (!isMoreSpecific) { |
| isActuallyBestSoFar = false; |
| break; |
| } |
| } |
| if (!isActuallyBestSoFar) { |
| // It's a member conflict that is reported elsewhere. |
| } else { |
| Member member = bestSoFar; |
| |
| if (_isForwarderRequired( |
| clsHasUserDefinedNoSuchMethod, member, cls, concreteMembers, |
| isPatch: member.fileUri != member.enclosingClass.fileUri) && |
| !existingForwarders.contains(member)) { |
| if (member is Procedure) { |
| // If there's a declared member with such name, then it's abstract |
| // -- transform it into a noSuchMethod forwarder. |
| if (ClassHierarchy.findMemberByName(declaredMembers, member.name) != |
| null) { |
| transformProcedureToNoSuchMethodForwarder( |
| noSuchMethod, target, member); |
| } else { |
| addNoSuchMethodForwarderForProcedure( |
| noSuchMethod, target, member, hierarchy); |
| } |
| changed = true; |
| } else if (member is Field) { |
| // Current class isn't abstract, so it can't have an abstract field |
| // with the same name -- just insert the forwarder. |
| if (forSetters) { |
| addNoSuchMethodForwarderSetterForField( |
| member, noSuchMethod, target); |
| } else { |
| addNoSuchMethodForwarderGetterForField( |
| member, noSuchMethod, target); |
| } |
| changed = true; |
| } else { |
| return unhandled( |
| "${member.runtimeType}", |
| "addNoSuchMethodForwarders", |
| cls.fileOffset, |
| cls.enclosingLibrary.fileUri); |
| } |
| } |
| } |
| } |
| |
| return changed; |
| } |
| |
| /// Adds noSuchMethod forwarding stubs to this class. |
| /// |
| /// Returns `true` if the class was modified. |
| bool addNoSuchMethodForwarders( |
| KernelTarget target, ClassHierarchy hierarchy) { |
| // Don't install forwarders in superclasses. |
| if (cls.isAbstract) return false; |
| |
| // Compute signatures of existing noSuchMethod forwarders in superclasses. |
| Set<Member> existingForwarders = new Set<Member>.identity(); |
| Set<Member> existingSetterForwarders = new Set<Member>.identity(); |
| { |
| Class nearestConcreteSuperclass = cls.superclass; |
| while (nearestConcreteSuperclass != null && |
| nearestConcreteSuperclass.isAbstract) { |
| nearestConcreteSuperclass = nearestConcreteSuperclass.superclass; |
| } |
| if (nearestConcreteSuperclass != null) { |
| bool superHasUserDefinedNoSuchMethod = hasUserDefinedNoSuchMethod( |
| nearestConcreteSuperclass, hierarchy, target.objectClass); |
| { |
| List<Member> concrete = |
| hierarchy.getDispatchTargets(nearestConcreteSuperclass); |
| for (Member member |
| in hierarchy.getInterfaceMembers(nearestConcreteSuperclass)) { |
| if (_isForwarderRequired(superHasUserDefinedNoSuchMethod, member, |
| nearestConcreteSuperclass, concrete, |
| isPatch: member.fileUri != member.enclosingClass.fileUri)) { |
| existingForwarders.add(member); |
| } |
| } |
| } |
| |
| { |
| List<Member> concreteSetters = hierarchy |
| .getDispatchTargets(nearestConcreteSuperclass, setters: true); |
| for (Member member in hierarchy |
| .getInterfaceMembers(nearestConcreteSuperclass, setters: true)) { |
| if (_isForwarderRequired(superHasUserDefinedNoSuchMethod, member, |
| nearestConcreteSuperclass, concreteSetters)) { |
| existingSetterForwarders.add(member); |
| } |
| } |
| } |
| } |
| } |
| |
| bool changed = false; |
| |
| // Install noSuchMethod forwarders for methods and getters. |
| changed = _addMissingNoSuchMethodForwarders(target, existingForwarders, |
| forSetters: false) || |
| changed; |
| |
| // Install noSuchMethod forwarders for setters. |
| changed = _addMissingNoSuchMethodForwarders( |
| target, existingSetterForwarders, |
| forSetters: true) || |
| changed; |
| |
| return changed; |
| } |
| |
| /// Tells if a noSuchMethod forwarder is required for [member] in [cls]. |
| bool _isForwarderRequired(bool hasUserDefinedNoSuchMethod, Member member, |
| Class cls, List<Member> concreteMembers, |
| {bool isPatch = false}) { |
| // A noSuchMethod forwarder is allowed for an abstract member if the class |
| // has a user-defined noSuchMethod or if the member is private and is |
| // defined in a different library. Private members in patches are assumed |
| // to be visible only to patches, so they are treated as if they were from |
| // another library. |
| bool isForwarderAllowed = hasUserDefinedNoSuchMethod || |
| (member.name.isPrivate && |
| cls.enclosingLibrary.compareTo(member.enclosingLibrary) != 0) || |
| (member.name.isPrivate && isPatch); |
| // A noSuchMethod forwarder is required if it's allowed and if there's no |
| // concrete implementation or a forwarder already. |
| bool isForwarderRequired = isForwarderAllowed && |
| ClassHierarchy.findMemberByName(concreteMembers, member.name) == null; |
| return isForwarderRequired; |
| } |
| |
| void addRedirectingConstructor(ProcedureBuilder constructorBuilder, |
| SourceLibraryBuilder library, Field referenceFrom) { |
| // Add a new synthetic field to this class for representing factory |
| // constructors. This is used to support resolving such constructors in |
| // source code. |
| // |
| // The synthetic field looks like this: |
| // |
| // final _redirecting# = [c1, ..., cn]; |
| // |
| // Where each c1 ... cn are an instance of [StaticGet] whose target is |
| // [constructor.target]. |
| // |
| // TODO(ahe): Add a kernel node to represent redirecting factory bodies. |
| DillMemberBuilder constructorsField = |
| origin.scope.lookupLocalMember(redirectingName, setter: false); |
| if (constructorsField == null) { |
| ListLiteral literal = new ListLiteral(<Expression>[]); |
| Name name = new Name(redirectingName, library.library); |
| Field field = new Field(name, |
| isStatic: true, |
| initializer: literal, |
| fileUri: cls.fileUri, |
| reference: referenceFrom?.reference) |
| ..fileOffset = cls.fileOffset; |
| cls.addMember(field); |
| constructorsField = new DillMemberBuilder(field, this); |
| origin.scope |
| .addLocalMember(redirectingName, constructorsField, setter: false); |
| } |
| Field field = constructorsField.member; |
| ListLiteral literal = field.initializer; |
| literal.expressions |
| .add(new StaticGet(constructorBuilder.procedure)..parent = literal); |
| } |
| |
| @override |
| int resolveConstructors(LibraryBuilder library) { |
| if (constructorReferences == null) return 0; |
| for (ConstructorReferenceBuilder ref in constructorReferences) { |
| ref.resolveIn(scope, library); |
| } |
| int count = constructorReferences.length; |
| if (count != 0) { |
| Map<String, MemberBuilder> constructors = this.constructors.local; |
| // Copy keys to avoid concurrent modification error. |
| List<String> names = constructors.keys.toList(); |
| for (String name in names) { |
| Builder declaration = constructors[name]; |
| do { |
| if (declaration.parent != this) { |
| unexpected("$fileUri", "${declaration.parent.fileUri}", charOffset, |
| fileUri); |
| } |
| if (declaration is RedirectingFactoryBuilder) { |
| // Compute the immediate redirection target, not the effective. |
| ConstructorReferenceBuilder redirectionTarget = |
| declaration.redirectionTarget; |
| if (redirectionTarget != null) { |
| Builder targetBuilder = redirectionTarget.target; |
| if (declaration.next == null) { |
| // Only the first one (that is, the last on in the linked list) |
| // is actually in the kernel tree. This call creates a StaticGet |
| // to [declaration.target] in a field `_redirecting#` which is |
| // only legal to do to things in the kernel tree. |
| Field referenceFrom = |
| referencesFromIndexed?.lookupField("_redirecting#"); |
| addRedirectingConstructor(declaration, library, referenceFrom); |
| } |
| if (targetBuilder is FunctionBuilder) { |
| List<DartType> typeArguments = declaration.typeArguments; |
| if (typeArguments == null) { |
| // TODO(32049) If type arguments aren't specified, they should |
| // be inferred. Currently, the inference is not performed. |
| // The code below is a workaround. |
| typeArguments = new List<DartType>.filled( |
| targetBuilder.member.enclosingClass.typeParameters.length, |
| const DynamicType(), |
| growable: true); |
| } |
| declaration.setRedirectingFactoryBody( |
| targetBuilder.member, typeArguments); |
| } else if (targetBuilder is DillMemberBuilder) { |
| List<DartType> typeArguments = declaration.typeArguments; |
| if (typeArguments == null) { |
| // TODO(32049) If type arguments aren't specified, they should |
| // be inferred. Currently, the inference is not performed. |
| // The code below is a workaround. |
| typeArguments = new List<DartType>.filled( |
| targetBuilder.member.enclosingClass.typeParameters.length, |
| const DynamicType(), |
| growable: true); |
| } |
| declaration.setRedirectingFactoryBody( |
| targetBuilder.member, typeArguments); |
| } else if (targetBuilder is AmbiguousBuilder) { |
| addProblem( |
| templateDuplicatedDeclarationUse |
| .withArguments(redirectionTarget.fullNameForErrors), |
| redirectionTarget.charOffset, |
| noLength); |
| // CoreTypes aren't computed yet, and this is the outline |
| // phase. So we can't and shouldn't create a method body. |
| declaration.body = new RedirectingFactoryBody.unresolved( |
| redirectionTarget.fullNameForErrors); |
| } else { |
| addProblem( |
| templateRedirectionTargetNotFound |
| .withArguments(redirectionTarget.fullNameForErrors), |
| redirectionTarget.charOffset, |
| noLength); |
| // CoreTypes aren't computed yet, and this is the outline |
| // phase. So we can't and shouldn't create a method body. |
| declaration.body = new RedirectingFactoryBody.unresolved( |
| redirectionTarget.fullNameForErrors); |
| } |
| } |
| } |
| declaration = declaration.next; |
| } while (declaration != null); |
| } |
| } |
| return count; |
| } |
| } |
