| // 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:front_end/src/fasta/kernel/combined_member_signature.dart'; |
| import 'package:kernel/ast.dart' hide MapEntry; |
| import 'package:kernel/class_hierarchy.dart' show ClassHierarchy; |
| import 'package:kernel/reference_from_index.dart' show IndexedClass; |
| import 'package:kernel/src/bounds_checks.dart'; |
| import 'package:kernel/src/legacy_erasure.dart'; |
| import 'package:kernel/src/types.dart' show Types; |
| import 'package:kernel/type_algebra.dart' show Substitution; |
| import 'package:kernel/type_environment.dart'; |
| |
| import '../builder/builder.dart'; |
| import '../builder/class_builder.dart'; |
| import '../builder/constructor_builder.dart'; |
| import '../builder/constructor_reference_builder.dart'; |
| import '../builder/field_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'; |
| |
| import '../fasta_codes.dart'; |
| |
| import '../kernel/kernel_builder.dart' show compareProcedures; |
| import '../kernel/kernel_target.dart' show KernelTarget; |
| import '../kernel/redirecting_factory_body.dart' show RedirectingFactoryBody; |
| import '../kernel/redirecting_factory_body.dart' show redirectingName; |
| import '../kernel/type_algorithms.dart' |
| show Variance, computeTypeVariableBuilderVariance; |
| |
| import '../names.dart' show equalsName, noSuchMethodName; |
| |
| import '../problems.dart' show unexpected, unhandled, unimplemented; |
| |
| import '../scope.dart'; |
| |
| import '../type_inference/type_schema.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 mixedInTypeBuilder; |
| |
| 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.mixedInTypeBuilder, |
| 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 = declaresConstConstructor; |
| } |
| |
| @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) { |
| if (member is Procedure) { |
| cls.addProcedure(member); |
| } else if (member is Field) { |
| cls.addField(member); |
| } else if (member is Constructor) { |
| cls.addConstructor(member); |
| } else if (member is RedirectingFactoryConstructor) { |
| cls.addRedirectingFactoryConstructor(member); |
| } else { |
| unhandled("${member.runtimeType}", "getMember", |
| member.fileOffset, member.fileUri); |
| } |
| } |
| }); |
| } else { |
| unhandled("${declaration.runtimeType}", "buildBuilders", |
| declaration.charOffset, declaration.fileUri); |
| } |
| declaration = declaration.next; |
| } while (declaration != null); |
| } |
| |
| scope.forEach(buildBuilders); |
| constructors.forEach(buildBuilders); |
| supertypeBuilder = checkSupertype(supertypeBuilder); |
| Supertype supertype = |
| supertypeBuilder?.buildSupertype(library, charOffset, fileUri); |
| if (supertype != null) { |
| Class superclass = supertype.classNode; |
| if (superclass.name == 'Function' && |
| superclass.enclosingLibrary == coreLibrary.library) { |
| library.addProblem( |
| messageExtendFunction, charOffset, noLength, fileUri); |
| supertype = null; |
| supertypeBuilder = null; |
| } |
| } |
| 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); |
| supertype = null; |
| } |
| if (supertype == null && supertypeBuilder is! NamedTypeBuilder) { |
| supertypeBuilder = null; |
| } |
| actualCls.supertype = supertype; |
| |
| mixedInTypeBuilder = checkSupertype(mixedInTypeBuilder); |
| Supertype mixedInType = |
| mixedInTypeBuilder?.buildMixedInType(library, charOffset, fileUri); |
| if (mixedInType != null) { |
| Class superclass = mixedInType.classNode; |
| if (superclass.name == 'Function' && |
| superclass.enclosingLibrary == coreLibrary.library) { |
| library.addProblem(messageMixinFunction, charOffset, noLength, fileUri); |
| mixedInType = null; |
| mixedInTypeBuilder = null; |
| actualCls.isAnonymousMixin = false; |
| isMixinDeclaration = false; |
| } |
| } |
| if (mixedInType == null && mixedInTypeBuilder is! NamedTypeBuilder) { |
| mixedInTypeBuilder = null; |
| } |
| actualCls.isMixinDeclaration = isMixinDeclaration; |
| actualCls.mixedInType = mixedInType; |
| |
| // TODO(ahe): If `cls.supertype` is null, and this isn't Object, report a |
| // compile-time error. |
| cls.isAbstract = isAbstract; |
| if (interfaceBuilders != null) { |
| for (int i = 0; i < interfaceBuilders.length; ++i) { |
| interfaceBuilders[i] = checkSupertype(interfaceBuilders[i]); |
| Supertype supertype = |
| interfaceBuilders[i].buildSupertype(library, charOffset, fileUri); |
| if (supertype != null) { |
| Class superclass = supertype.classNode; |
| if (superclass.name == 'Function' && |
| superclass.enclosingLibrary == coreLibrary.library) { |
| library.addProblem( |
| messageImplementFunction, charOffset, noLength, fileUri); |
| continue; |
| } |
| // 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 = computeTypeVariableBuilderVariance( |
| 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(), |
| /* arguments = */ null, |
| fileUri, |
| charOffset) |
| ..bind(new InvalidTypeDeclarationBuilder(supertype.name, |
| message.withLocation(fileUri, charOffset, noLength))); |
| } |
| return supertype; |
| } |
| |
| void checkVarianceInField(SourceFieldBuilder fieldBuilder, |
| TypeEnvironment typeEnvironment, List<TypeParameter> typeParameters) { |
| for (TypeParameter typeParameter in typeParameters) { |
| int fieldVariance = |
| computeVariance(typeParameter, fieldBuilder.fieldType); |
| if (fieldBuilder.isClassInstanceMember) { |
| reportVariancePositionIfInvalid(fieldVariance, typeParameter, |
| fieldBuilder.fileUri, fieldBuilder.charOffset); |
| } |
| if (fieldBuilder.isClassInstanceMember && |
| fieldBuilder.isAssignable && |
| !fieldBuilder.isCovariant) { |
| fieldVariance = Variance.combine(Variance.contravariant, fieldVariance); |
| reportVariancePositionIfInvalid(fieldVariance, typeParameter, |
| fieldBuilder.fileUri, fieldBuilder.charOffset); |
| } |
| } |
| } |
| |
| void checkVarianceInFunction(Procedure procedure, |
| TypeEnvironment typeEnvironment, List<TypeParameter> typeParameters) { |
| List<TypeParameter> functionTypeParameters = |
| procedure.function.typeParameters; |
| List<VariableDeclaration> positionalParameters = |
| procedure.function.positionalParameters; |
| List<VariableDeclaration> namedParameters = |
| procedure.function.namedParameters; |
| DartType returnType = procedure.function.returnType; |
| |
| if (functionTypeParameters != null) { |
| for (TypeParameter functionParameter in functionTypeParameters) { |
| for (TypeParameter typeParameter in typeParameters) { |
| int typeVariance = Variance.combine(Variance.invariant, |
| computeVariance(typeParameter, functionParameter.bound)); |
| reportVariancePositionIfInvalid(typeVariance, typeParameter, fileUri, |
| functionParameter.fileOffset); |
| } |
| } |
| } |
| if (positionalParameters != null) { |
| for (VariableDeclaration formal in positionalParameters) { |
| if (!formal.isCovariant) { |
| for (TypeParameter typeParameter in typeParameters) { |
| int formalVariance = Variance.combine(Variance.contravariant, |
| computeVariance(typeParameter, formal.type)); |
| reportVariancePositionIfInvalid( |
| formalVariance, typeParameter, fileUri, formal.fileOffset); |
| } |
| } |
| } |
| } |
| if (namedParameters != null) { |
| for (VariableDeclaration named in namedParameters) { |
| for (TypeParameter typeParameter in typeParameters) { |
| int namedVariance = Variance.combine(Variance.contravariant, |
| computeVariance(typeParameter, named.type)); |
| reportVariancePositionIfInvalid( |
| namedVariance, typeParameter, fileUri, named.fileOffset); |
| } |
| } |
| } |
| if (returnType != null) { |
| for (TypeParameter typeParameter in typeParameters) { |
| int returnTypeVariance = computeVariance(typeParameter, returnType); |
| reportVariancePositionIfInvalid(returnTypeVariance, typeParameter, |
| fileUri, procedure.function.fileOffset, |
| isReturnType: true); |
| } |
| } |
| } |
| |
| void reportVariancePositionIfInvalid( |
| int variance, TypeParameter typeParameter, Uri fileUri, int fileOffset, |
| {bool isReturnType: false}) { |
| SourceLibraryBuilder library = this.library; |
| if (!typeParameter.isLegacyCovariant && |
| !Variance.greaterThanOrEqual(variance, typeParameter.variance)) { |
| Message message; |
| if (isReturnType) { |
| message = templateInvalidTypeVariableVariancePositionInReturnType |
| .withArguments(Variance.keywordString(typeParameter.variance), |
| typeParameter.name, Variance.keywordString(variance)); |
| } else { |
| message = templateInvalidTypeVariableVariancePosition.withArguments( |
| Variance.keywordString(typeParameter.variance), |
| typeParameter.name, |
| Variance.keywordString(variance)); |
| } |
| library.reportTypeArgumentIssue( |
| message, fileUri, fileOffset, typeParameter); |
| } |
| } |
| |
| void checkBoundsInSupertype( |
| Supertype supertype, TypeEnvironment typeEnvironment) { |
| SourceLibraryBuilder libraryBuilder = this.library; |
| Library library = libraryBuilder.library; |
| final DartType bottomType = library.isNonNullableByDefault |
| ? const NeverType(Nullability.nonNullable) |
| : const NullType(); |
| |
| Set<TypeArgumentIssue> issues = {}; |
| issues.addAll(findTypeArgumentIssues( |
| library, |
| new InterfaceType(supertype.classNode, library.nonNullable, |
| supertype.typeArguments), |
| typeEnvironment, |
| SubtypeCheckMode.ignoringNullabilities, |
| bottomType, |
| allowSuperBounded: false) ?? |
| const []); |
| if (library.isNonNullableByDefault) { |
| issues.addAll(findTypeArgumentIssues( |
| library, |
| new InterfaceType(supertype.classNode, library.nonNullable, |
| supertype.typeArguments), |
| typeEnvironment, |
| SubtypeCheckMode.withNullabilities, |
| bottomType, |
| allowSuperBounded: false) ?? |
| const []); |
| } |
| for (TypeArgumentIssue issue in issues) { |
| DartType argument = issue.argument; |
| TypeParameter typeParameter = issue.typeParameter; |
| bool inferred = libraryBuilder.inferredTypes.contains(argument); |
| if (argument is FunctionType && argument.typeParameters.length > 0) { |
| if (inferred) { |
| libraryBuilder.reportTypeArgumentIssue( |
| templateGenericFunctionTypeInferredAsActualTypeArgument |
| .withArguments(argument, library.isNonNullableByDefault), |
| fileUri, |
| charOffset, |
| null); |
| } else { |
| libraryBuilder.reportTypeArgumentIssue( |
| messageGenericFunctionTypeUsedAsActualTypeArgument, |
| fileUri, |
| charOffset, |
| null); |
| } |
| } else { |
| void reportProblem( |
| Template< |
| Message Function(DartType, DartType, String, String, String, |
| String, bool)> |
| template) { |
| libraryBuilder.reportTypeArgumentIssue( |
| template.withArguments( |
| argument, |
| typeParameter.bound, |
| typeParameter.name, |
| getGenericTypeName(issue.enclosingType), |
| supertype.classNode.name, |
| name, |
| library.isNonNullableByDefault), |
| fileUri, |
| charOffset, |
| typeParameter); |
| } |
| |
| if (inferred) { |
| reportProblem(templateIncorrectTypeArgumentInSupertypeInferred); |
| } else { |
| reportProblem(templateIncorrectTypeArgumentInSupertype); |
| } |
| } |
| } |
| } |
| |
| void checkTypesInOutline(TypeEnvironment typeEnvironment) { |
| library.checkBoundsInTypeParameters( |
| typeEnvironment, cls.typeParameters, fileUri); |
| |
| // Check in supers. |
| if (cls.supertype != null) { |
| checkBoundsInSupertype(cls.supertype, typeEnvironment); |
| } |
| if (cls.mixedInType != null) { |
| checkBoundsInSupertype(cls.mixedInType, typeEnvironment); |
| } |
| if (cls.implementedTypes != null) { |
| for (Supertype supertype in cls.implementedTypes) { |
| checkBoundsInSupertype(supertype, typeEnvironment); |
| } |
| } |
| |
| forEach((String name, Builder builder) { |
| if (builder is SourceFieldBuilder) { |
| // Check fields. |
| checkVarianceInField(builder, typeEnvironment, cls.typeParameters); |
| library.checkTypesInField(builder, typeEnvironment); |
| } else if (builder is ProcedureBuilder) { |
| // Check procedures |
| checkVarianceInFunction( |
| builder.procedure, typeEnvironment, cls.typeParameters); |
| library.checkTypesInProcedureBuilder(builder, typeEnvironment); |
| } else { |
| assert(builder is DillFieldBuilder && builder.name == redirectingName, |
| "Unexpected member: $builder."); |
| } |
| }); |
| |
| forEachConstructor((String name, MemberBuilder builder) { |
| if (builder is ConstructorBuilder) { |
| library.checkTypesInConstructorBuilder(builder, typeEnvironment); |
| } else if (builder is RedirectingFactoryBuilder) { |
| library.checkTypesInRedirectingFactoryBuilder(builder, typeEnvironment); |
| } else if (builder is ProcedureBuilder) { |
| assert(builder.isFactory, "Unexpected constructor $builder."); |
| library.checkTypesInProcedureBuilder(builder, typeEnvironment); |
| } else { |
| assert( |
| // This is a synthesized constructor. |
| builder is DillConstructorBuilder && builder.member is Constructor, |
| "Unexpected constructor: $builder."); |
| } |
| }, includeInjectedConstructors: true); |
| } |
| |
| void addSyntheticConstructor(SyntheticConstructorBuilder constructorBuilder) { |
| String name = constructorBuilder.name; |
| constructorBuilder.next = constructorScopeBuilder[name]; |
| constructorScopeBuilder.addMember(name, constructorBuilder); |
| // Synthetic constructors are created after the component has been built |
| // so we need to add the constructor to the class. |
| cls.addConstructor(constructorBuilder.member); |
| if (constructorBuilder.isConst) { |
| cls.hasConstConstructor = true; |
| } |
| } |
| |
| @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; |
| } |
| |
| /// Return a map whose keys are the supertypes of this [SourceClassBuilder] |
| /// after expansion of type aliases, if any. For each supertype key, the |
| /// corresponding value is the type alias which was unaliased in order to |
| /// find the supertype, or null if the supertype was not aliased. |
| Map<TypeDeclarationBuilder, TypeAliasBuilder> computeDirectSupertypes( |
| ClassBuilder objectClass) { |
| final Map<TypeDeclarationBuilder, TypeAliasBuilder> result = |
| <TypeDeclarationBuilder, TypeAliasBuilder>{}; |
| final TypeBuilder supertype = this.supertypeBuilder; |
| if (supertype != null) { |
| TypeDeclarationBuilder declarationBuilder = supertype.declaration; |
| if (declarationBuilder is TypeAliasBuilder) { |
| TypeAliasBuilder aliasBuilder = declarationBuilder; |
| NamedTypeBuilder namedBuilder = supertype; |
| declarationBuilder = |
| aliasBuilder.unaliasDeclaration(namedBuilder.arguments); |
| result[declarationBuilder] = aliasBuilder; |
| } else { |
| result[declarationBuilder] = null; |
| } |
| } else if (objectClass != this) { |
| result[objectClass] = null; |
| } |
| final List<TypeBuilder> interfaces = this.interfaceBuilders; |
| 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; |
| NamedTypeBuilder namedBuilder = interface; |
| declarationBuilder = |
| aliasBuilder.unaliasDeclaration(namedBuilder.arguments); |
| result[declarationBuilder] = aliasBuilder; |
| } else { |
| result[declarationBuilder] = null; |
| } |
| } |
| } |
| final TypeBuilder mixedInTypeBuilder = this.mixedInTypeBuilder; |
| if (mixedInTypeBuilder != null) { |
| TypeDeclarationBuilder declarationBuilder = |
| mixedInTypeBuilder.declaration; |
| if (declarationBuilder is TypeAliasBuilder) { |
| TypeAliasBuilder aliasBuilder = declarationBuilder; |
| NamedTypeBuilder namedBuilder = mixedInTypeBuilder; |
| declarationBuilder = |
| aliasBuilder.unaliasDeclaration(namedBuilder.arguments); |
| result[declarationBuilder] = aliasBuilder; |
| } else { |
| result[declarationBuilder] = null; |
| } |
| } |
| return result; |
| } |
| |
| @override |
| int compareTo(SourceClassBuilder other) { |
| int result = "$fileUri".compareTo("${other.fileUri}"); |
| if (result != 0) return result; |
| return charOffset.compareTo(other.charOffset); |
| } |
| |
| bool _addMissingNoSuchMethodForwarders( |
| KernelTarget target, Set<Member> existingForwarders, |
| {bool forSetters}) { |
| assert(forSetters != null); |
| |
| ClassHierarchy hierarchy = target.loader.hierarchy; |
| |
| 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); |
| CombinedMemberSignatureBuilder combinedMemberSignature = |
| new CombinedMemberSignatureBuilder(hierarchy, this, members, |
| forSetter: forSetters); |
| Member member = combinedMemberSignature.canonicalMember; |
| if (member != null) { |
| if (_isForwarderRequired( |
| clsHasUserDefinedNoSuchMethod, member, cls, concreteMembers, |
| isPatch: member.fileUri != member.enclosingClass.fileUri) && |
| !existingForwarders.contains(member)) { |
| assert(!combinedMemberSignature.needsCovarianceMerging, |
| "Needed covariant merging for ${members}"); |
| if (ClassHierarchy.findMemberByName(declaredMembers, member.name) != |
| null) { |
| _transformProcedureToNoSuchMethodForwarder( |
| noSuchMethod, target, member); |
| } else { |
| Procedure memberSignature = |
| combinedMemberSignature.createMemberFromSignature(); |
| _transformProcedureToNoSuchMethodForwarder( |
| noSuchMethod, target, memberSignature); |
| cls.procedures.add(memberSignature); |
| memberSignature.parent = cls; |
| |
| if (member is Procedure) { |
| library.forwardersOrigins.add(memberSignature); |
| library.forwardersOrigins.add(member); |
| } |
| } |
| changed = true; |
| } |
| } |
| } |
| |
| 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 _transformProcedureToNoSuchMethodForwarder( |
| Member noSuchMethodInterface, KernelTarget target, Procedure procedure) { |
| String prefix = procedure.isGetter |
| ? 'get:' |
| : procedure.isSetter |
| ? 'set:' |
| : ''; |
| String invocationName = prefix + procedure.name.text; |
| if (procedure.isSetter) invocationName += '='; |
| Expression invocation = target.backendTarget.instantiateInvocation( |
| target.loader.coreTypes, |
| new ThisExpression(), |
| invocationName, |
| new Arguments.forwarded(procedure.function, library.library), |
| procedure.fileOffset, |
| /*isSuper=*/ false); |
| Expression result = new MethodInvocation(new ThisExpression(), |
| noSuchMethodName, new Arguments([invocation]), noSuchMethodInterface) |
| ..fileOffset = procedure.fileOffset; |
| if (procedure.function.returnType is! VoidType) { |
| result = new AsExpression(result, procedure.function.returnType) |
| ..isTypeError = true |
| ..isForDynamic = true |
| ..isForNonNullableByDefault = library.isNonNullableByDefault |
| ..fileOffset = procedure.fileOffset; |
| } |
| procedure.function.body = new ReturnStatement(result) |
| ..fileOffset = procedure.fileOffset; |
| procedure.function.body.parent = procedure.function; |
| procedure.function.asyncMarker = AsyncMarker.Sync; |
| procedure.function.dartAsyncMarker = AsyncMarker.Sync; |
| |
| procedure.isAbstract = false; |
| procedure.isNoSuchMethodForwarder = true; |
| procedure.isMemberSignature = false; |
| procedure.isForwardingStub = false; |
| procedure.isForwardingSemiStub = false; |
| procedure.memberSignatureOrigin = null; |
| procedure.forwardingStubInterfaceTarget = null; |
| procedure.forwardingStubSuperTarget = null; |
| } |
| |
| 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. |
| DillFieldBuilder 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, |
| getterReference: referenceFrom?.getterReference, |
| setterReference: referenceFrom?.setterReference) |
| ..fileOffset = cls.fileOffset; |
| cls.addField(field); |
| constructorsField = new DillFieldBuilder(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 ?? |
| new List<DartType>.filled( |
| targetBuilder |
| .member.enclosingClass.typeParameters.length, |
| const UnknownType()); |
| declaration.setRedirectingFactoryBody( |
| targetBuilder.member, typeArguments); |
| } else if (targetBuilder is DillMemberBuilder) { |
| List<DartType> typeArguments = declaration.typeArguments ?? |
| new List<DartType>.filled( |
| targetBuilder |
| .member.enclosingClass.typeParameters.length, |
| const UnknownType()); |
| 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; |
| } |
| |
| void checkOverride( |
| Types types, |
| Member declaredMember, |
| Member interfaceMember, |
| bool isSetter, |
| callback(Member declaredMember, Member interfaceMember, bool isSetter), |
| {bool isInterfaceCheck = false}) { |
| if (declaredMember == interfaceMember) { |
| return; |
| } |
| Member interfaceMemberOrigin = |
| interfaceMember.memberSignatureOrigin ?? interfaceMember; |
| if (declaredMember is Constructor || interfaceMember is Constructor) { |
| unimplemented( |
| "Constructor in override check.", declaredMember.fileOffset, fileUri); |
| } |
| if (declaredMember is Procedure && interfaceMember is Procedure) { |
| if (declaredMember.kind == interfaceMember.kind) { |
| if (declaredMember.kind == ProcedureKind.Method || |
| declaredMember.kind == ProcedureKind.Operator) { |
| bool seenCovariant = checkMethodOverride(types, declaredMember, |
| interfaceMember, interfaceMemberOrigin, isInterfaceCheck); |
| if (seenCovariant) { |
| handleSeenCovariant( |
| types, declaredMember, interfaceMember, isSetter, callback); |
| } |
| } else if (declaredMember.kind == ProcedureKind.Getter) { |
| checkGetterOverride(types, declaredMember, interfaceMember, |
| interfaceMemberOrigin, isInterfaceCheck); |
| } else if (declaredMember.kind == ProcedureKind.Setter) { |
| bool seenCovariant = checkSetterOverride(types, declaredMember, |
| interfaceMember, interfaceMemberOrigin, isInterfaceCheck); |
| if (seenCovariant) { |
| handleSeenCovariant( |
| types, declaredMember, interfaceMember, isSetter, callback); |
| } |
| } else { |
| assert( |
| false, |
| "Unexpected procedure kind in override check: " |
| "${declaredMember.kind}"); |
| } |
| } |
| } else { |
| bool declaredMemberHasGetter = declaredMember is Field || |
| declaredMember is Procedure && declaredMember.isGetter; |
| bool interfaceMemberHasGetter = interfaceMember is Field || |
| interfaceMember is Procedure && interfaceMember.isGetter; |
| bool declaredMemberHasSetter = (declaredMember is Field && |
| !declaredMember.isFinal && |
| !declaredMember.isConst) || |
| declaredMember is Procedure && declaredMember.isSetter; |
| bool interfaceMemberHasSetter = (interfaceMember is Field && |
| !interfaceMember.isFinal && |
| !interfaceMember.isConst) || |
| interfaceMember is Procedure && interfaceMember.isSetter; |
| if (declaredMemberHasGetter && interfaceMemberHasGetter) { |
| checkGetterOverride(types, declaredMember, interfaceMember, |
| interfaceMemberOrigin, isInterfaceCheck); |
| } |
| if (declaredMemberHasSetter && interfaceMemberHasSetter) { |
| bool seenCovariant = checkSetterOverride(types, declaredMember, |
| interfaceMember, interfaceMemberOrigin, isInterfaceCheck); |
| if (seenCovariant) { |
| handleSeenCovariant( |
| types, declaredMember, interfaceMember, isSetter, callback); |
| } |
| } |
| } |
| // TODO(ahe): Handle other cases: accessors, operators, and fields. |
| } |
| |
| void checkGetterSetter(Types types, Member getter, Member setter) { |
| if (getter == setter) { |
| return; |
| } |
| if (cls != getter.enclosingClass && |
| getter.enclosingClass == setter.enclosingClass) { |
| return; |
| } |
| |
| DartType getterType = getter.getterType; |
| if (getter.enclosingClass.typeParameters.isNotEmpty) { |
| getterType = Substitution.fromPairs( |
| getter.enclosingClass.typeParameters, |
| types.hierarchy.getTypeArgumentsAsInstanceOf( |
| thisType, getter.enclosingClass)) |
| .substituteType(getterType); |
| } |
| |
| DartType setterType = setter.setterType; |
| if (setter.enclosingClass.typeParameters.isNotEmpty) { |
| setterType = Substitution.fromPairs( |
| setter.enclosingClass.typeParameters, |
| types.hierarchy.getTypeArgumentsAsInstanceOf( |
| thisType, setter.enclosingClass)) |
| .substituteType(setterType); |
| } |
| |
| if (getterType is InvalidType || setterType is InvalidType) { |
| // Don't report a problem as something else is wrong that has already |
| // been reported. |
| } else { |
| bool isValid = types.isSubtypeOf( |
| getterType, |
| setterType, |
| library.isNonNullableByDefault |
| ? SubtypeCheckMode.withNullabilities |
| : SubtypeCheckMode.ignoringNullabilities); |
| if (!isValid && !library.isNonNullableByDefault) { |
| // Allow assignability in legacy libraries. |
| isValid = types.isSubtypeOf( |
| setterType, getterType, SubtypeCheckMode.ignoringNullabilities); |
| } |
| if (!isValid) { |
| Member getterOrigin = getter.memberSignatureOrigin ?? getter; |
| Member setterOrigin = setter.memberSignatureOrigin ?? setter; |
| String getterMemberName = '${getterOrigin.enclosingClass.name}' |
| '.${getterOrigin.name.text}'; |
| String setterMemberName = '${setterOrigin.enclosingClass.name}' |
| '.${setterOrigin.name.text}'; |
| if (getterOrigin.enclosingClass == cls && |
| setterOrigin.enclosingClass == cls) { |
| Template<Message Function(DartType, String, DartType, String, bool)> |
| template = library.isNonNullableByDefault |
| ? templateInvalidGetterSetterType |
| : templateInvalidGetterSetterTypeLegacy; |
| library.addProblem( |
| template.withArguments(getterType, getterMemberName, setterType, |
| setterMemberName, library.isNonNullableByDefault), |
| getterOrigin.fileOffset, |
| getterOrigin.name.text.length, |
| getterOrigin.fileUri, |
| context: [ |
| templateInvalidGetterSetterTypeSetterContext |
| .withArguments(setterMemberName) |
| .withLocation(setterOrigin.fileUri, setterOrigin.fileOffset, |
| setterOrigin.name.text.length) |
| ]); |
| } else if (getterOrigin.enclosingClass == cls) { |
| Template<Message Function(DartType, String, DartType, String, bool)> |
| template = library.isNonNullableByDefault |
| ? templateInvalidGetterSetterTypeSetterInheritedGetter |
| : templateInvalidGetterSetterTypeSetterInheritedGetterLegacy; |
| if (getterOrigin is Field) { |
| template = library.isNonNullableByDefault |
| ? templateInvalidGetterSetterTypeSetterInheritedField |
| : templateInvalidGetterSetterTypeSetterInheritedFieldLegacy; |
| } |
| library.addProblem( |
| template.withArguments(getterType, getterMemberName, setterType, |
| setterMemberName, library.isNonNullableByDefault), |
| getterOrigin.fileOffset, |
| getterOrigin.name.text.length, |
| getterOrigin.fileUri, |
| context: [ |
| templateInvalidGetterSetterTypeSetterContext |
| .withArguments(setterMemberName) |
| .withLocation(setterOrigin.fileUri, setterOrigin.fileOffset, |
| setterOrigin.name.text.length) |
| ]); |
| } else if (setterOrigin.enclosingClass == cls) { |
| Template<Message Function(DartType, String, DartType, String, bool)> |
| template = library.isNonNullableByDefault |
| ? templateInvalidGetterSetterTypeGetterInherited |
| : templateInvalidGetterSetterTypeGetterInheritedLegacy; |
| Template<Message Function(String)> context = |
| templateInvalidGetterSetterTypeGetterContext; |
| if (getterOrigin is Field) { |
| template = library.isNonNullableByDefault |
| ? templateInvalidGetterSetterTypeFieldInherited |
| : templateInvalidGetterSetterTypeFieldInheritedLegacy; |
| context = templateInvalidGetterSetterTypeFieldContext; |
| } |
| library.addProblem( |
| template.withArguments(getterType, getterMemberName, setterType, |
| setterMemberName, library.isNonNullableByDefault), |
| setterOrigin.fileOffset, |
| setterOrigin.name.text.length, |
| setterOrigin.fileUri, |
| context: [ |
| context.withArguments(getterMemberName).withLocation( |
| getterOrigin.fileUri, |
| getterOrigin.fileOffset, |
| getterOrigin.name.text.length) |
| ]); |
| } else { |
| Template<Message Function(DartType, String, DartType, String, bool)> |
| template = library.isNonNullableByDefault |
| ? templateInvalidGetterSetterTypeBothInheritedGetter |
| : templateInvalidGetterSetterTypeBothInheritedGetterLegacy; |
| Template<Message Function(String)> context = |
| templateInvalidGetterSetterTypeGetterContext; |
| if (getterOrigin is Field) { |
| template = library.isNonNullableByDefault |
| ? templateInvalidGetterSetterTypeBothInheritedField |
| : templateInvalidGetterSetterTypeBothInheritedFieldLegacy; |
| context = templateInvalidGetterSetterTypeFieldContext; |
| } |
| library.addProblem( |
| template.withArguments(getterType, getterMemberName, setterType, |
| setterMemberName, library.isNonNullableByDefault), |
| charOffset, |
| noLength, |
| fileUri, |
| context: [ |
| context.withArguments(getterMemberName).withLocation( |
| getterOrigin.fileUri, |
| getterOrigin.fileOffset, |
| getterOrigin.name.text.length), |
| templateInvalidGetterSetterTypeSetterContext |
| .withArguments(setterMemberName) |
| .withLocation(setterOrigin.fileUri, setterOrigin.fileOffset, |
| setterOrigin.name.text.length) |
| ]); |
| } |
| } |
| } |
| } |
| |
| Uri _getMemberUri(Member member) { |
| if (member is Field) return member.fileUri; |
| if (member is Procedure) return member.fileUri; |
| // Other member types won't be seen because constructors don't participate |
| // in override relationships |
| return unhandled('${member.runtimeType}', '_getMemberUri', -1, null); |
| } |
| |
| Substitution _computeInterfaceSubstitution( |
| Types types, |
| Member declaredMember, |
| Member interfaceMember, |
| Member interfaceMemberOrigin, |
| FunctionNode declaredFunction, |
| FunctionNode interfaceFunction, |
| bool isInterfaceCheck) { |
| Substitution interfaceSubstitution = Substitution.empty; |
| if (interfaceMember.enclosingClass.typeParameters.isNotEmpty) { |
| Class enclosingClass = interfaceMember.enclosingClass; |
| interfaceSubstitution = Substitution.fromPairs( |
| enclosingClass.typeParameters, |
| types.hierarchy |
| .getTypeArgumentsAsInstanceOf(thisType, enclosingClass)); |
| } |
| |
| if (declaredFunction?.typeParameters?.length != |
| interfaceFunction?.typeParameters?.length) { |
| reportInvalidOverride( |
| isInterfaceCheck, |
| declaredMember, |
| templateOverrideTypeVariablesMismatch.withArguments( |
| "${declaredMember.enclosingClass.name}." |
| "${declaredMember.name.text}", |
| "${interfaceMemberOrigin.enclosingClass.name}." |
| "${interfaceMemberOrigin.name.text}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMemberOrigin.name.text) |
| .withLocation(_getMemberUri(interfaceMemberOrigin), |
| interfaceMemberOrigin.fileOffset, noLength) |
| ]); |
| } else if (declaredFunction?.typeParameters != null) { |
| Map<TypeParameter, DartType> substitutionMap = |
| <TypeParameter, DartType>{}; |
| for (int i = 0; i < declaredFunction.typeParameters.length; ++i) { |
| substitutionMap[interfaceFunction.typeParameters[i]] = |
| new TypeParameterType.forAlphaRenaming( |
| interfaceFunction.typeParameters[i], |
| declaredFunction.typeParameters[i]); |
| } |
| Substitution substitution = Substitution.fromMap(substitutionMap); |
| for (int i = 0; i < declaredFunction.typeParameters.length; ++i) { |
| TypeParameter declaredParameter = declaredFunction.typeParameters[i]; |
| TypeParameter interfaceParameter = interfaceFunction.typeParameters[i]; |
| if (!interfaceParameter.isGenericCovariantImpl) { |
| DartType declaredBound = declaredParameter.bound; |
| DartType interfaceBound = interfaceParameter.bound; |
| if (interfaceSubstitution != null) { |
| declaredBound = interfaceSubstitution.substituteType(declaredBound); |
| interfaceBound = |
| interfaceSubstitution.substituteType(interfaceBound); |
| } |
| DartType computedBound = substitution.substituteType(interfaceBound); |
| if (!library.isNonNullableByDefault) { |
| computedBound = |
| legacyErasure(types.hierarchy.coreTypes, computedBound); |
| } |
| if (!types |
| .performNullabilityAwareMutualSubtypesCheck( |
| declaredBound, computedBound) |
| .isSubtypeWhenUsingNullabilities()) { |
| reportInvalidOverride( |
| isInterfaceCheck, |
| declaredMember, |
| templateOverrideTypeVariablesBoundMismatch.withArguments( |
| declaredBound, |
| declaredParameter.name, |
| "${declaredMember.enclosingClass.name}." |
| "${declaredMember.name.text}", |
| computedBound, |
| "${interfaceMemberOrigin.enclosingClass.name}." |
| "${interfaceMemberOrigin.name.text}", |
| library.isNonNullableByDefault), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMemberOrigin.name.text) |
| .withLocation(_getMemberUri(interfaceMemberOrigin), |
| interfaceMemberOrigin.fileOffset, noLength) |
| ]); |
| } |
| } |
| } |
| interfaceSubstitution = |
| Substitution.combine(interfaceSubstitution, substitution); |
| } |
| return interfaceSubstitution; |
| } |
| |
| Substitution _computeDeclaredSubstitution( |
| Types types, Member declaredMember) { |
| Substitution declaredSubstitution = Substitution.empty; |
| if (declaredMember.enclosingClass.typeParameters.isNotEmpty) { |
| Class enclosingClass = declaredMember.enclosingClass; |
| declaredSubstitution = Substitution.fromPairs( |
| enclosingClass.typeParameters, |
| types.hierarchy |
| .getTypeArgumentsAsInstanceOf(thisType, enclosingClass)); |
| } |
| return declaredSubstitution; |
| } |
| |
| void _checkTypes( |
| Types types, |
| Substitution interfaceSubstitution, |
| Substitution declaredSubstitution, |
| Member declaredMember, |
| Member interfaceMember, |
| Member interfaceMemberOrigin, |
| DartType declaredType, |
| DartType interfaceType, |
| bool isCovariant, |
| VariableDeclaration declaredParameter, |
| bool isInterfaceCheck, |
| {bool asIfDeclaredParameter = false}) { |
| if (interfaceSubstitution != null) { |
| interfaceType = interfaceSubstitution.substituteType(interfaceType); |
| } |
| if (declaredSubstitution != null) { |
| declaredType = declaredSubstitution.substituteType(declaredType); |
| } |
| |
| if (!declaredMember.isNonNullableByDefault && |
| interfaceMember.isNonNullableByDefault) { |
| interfaceType = legacyErasure(types.hierarchy.coreTypes, interfaceType); |
| } |
| |
| bool inParameter = declaredParameter != null || asIfDeclaredParameter; |
| DartType subtype = inParameter ? interfaceType : declaredType; |
| DartType supertype = inParameter ? declaredType : interfaceType; |
| |
| if (types.isSubtypeOf( |
| subtype, supertype, SubtypeCheckMode.withNullabilities)) { |
| // No problem--the proper subtyping relation is satisfied. |
| } else if (isCovariant && |
| types.isSubtypeOf( |
| supertype, subtype, SubtypeCheckMode.withNullabilities)) { |
| // No problem--the overriding parameter is marked "covariant" and has |
| // a type which is a subtype of the parameter it overrides. |
| } else if (subtype is InvalidType || supertype is InvalidType) { |
| // Don't report a problem as something else is wrong that has already |
| // been reported. |
| } else { |
| // Report an error. |
| bool isErrorInNnbdOptedOutMode = !types.isSubtypeOf( |
| subtype, supertype, SubtypeCheckMode.ignoringNullabilities) && |
| (!isCovariant || |
| !types.isSubtypeOf( |
| supertype, subtype, SubtypeCheckMode.ignoringNullabilities)); |
| if (isErrorInNnbdOptedOutMode || library.isNonNullableByDefault) { |
| String declaredMemberName = '${declaredMember.enclosingClass.name}' |
| '.${declaredMember.name.text}'; |
| String interfaceMemberName = |
| '${interfaceMemberOrigin.enclosingClass.name}' |
| '.${interfaceMemberOrigin.name.text}'; |
| Message message; |
| int fileOffset; |
| if (declaredParameter == null) { |
| if (asIfDeclaredParameter) { |
| // Setter overridden by field |
| message = templateOverrideTypeMismatchSetter.withArguments( |
| declaredMemberName, |
| declaredType, |
| interfaceType, |
| interfaceMemberName, |
| library.isNonNullableByDefault); |
| } else { |
| message = templateOverrideTypeMismatchReturnType.withArguments( |
| declaredMemberName, |
| declaredType, |
| interfaceType, |
| interfaceMemberName, |
| library.isNonNullableByDefault); |
| } |
| fileOffset = declaredMember.fileOffset; |
| } else { |
| message = templateOverrideTypeMismatchParameter.withArguments( |
| declaredParameter.name, |
| declaredMemberName, |
| declaredType, |
| interfaceType, |
| interfaceMemberName, |
| library.isNonNullableByDefault); |
| fileOffset = declaredParameter.fileOffset; |
| } |
| reportInvalidOverride( |
| isInterfaceCheck, declaredMember, message, fileOffset, noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMemberOrigin.name.text) |
| .withLocation(_getMemberUri(interfaceMemberOrigin), |
| interfaceMemberOrigin.fileOffset, noLength) |
| ]); |
| } |
| } |
| } |
| |
| /// Checks whether [declaredMember] correctly overrides [interfaceMember]. |
| /// |
| /// If an error is reporter [interfaceMemberOrigin] is used as the context |
| /// for where [interfaceMember] was declared, since [interfaceMember] might |
| /// itself be synthesized. |
| /// |
| /// Returns whether a covariant parameter was seen and more methods thus have |
| /// to be checked. |
| bool checkMethodOverride( |
| Types types, |
| Procedure declaredMember, |
| Procedure interfaceMember, |
| Member interfaceMemberOrigin, |
| bool isInterfaceCheck) { |
| assert(declaredMember.kind == interfaceMember.kind); |
| assert(declaredMember.kind == ProcedureKind.Method || |
| declaredMember.kind == ProcedureKind.Operator); |
| bool seenCovariant = false; |
| FunctionNode declaredFunction = declaredMember.function; |
| FunctionNode interfaceFunction = interfaceMember.function; |
| |
| Substitution interfaceSubstitution = _computeInterfaceSubstitution( |
| types, |
| declaredMember, |
| interfaceMember, |
| interfaceMemberOrigin, |
| declaredFunction, |
| interfaceFunction, |
| isInterfaceCheck); |
| |
| Substitution declaredSubstitution = |
| _computeDeclaredSubstitution(types, declaredMember); |
| |
| _checkTypes( |
| types, |
| interfaceSubstitution, |
| declaredSubstitution, |
| declaredMember, |
| interfaceMember, |
| interfaceMemberOrigin, |
| declaredFunction.returnType, |
| interfaceFunction.returnType, |
| false, |
| null, |
| isInterfaceCheck); |
| if (declaredFunction.positionalParameters.length < |
| interfaceFunction.positionalParameters.length) { |
| reportInvalidOverride( |
| isInterfaceCheck, |
| declaredMember, |
| templateOverrideFewerPositionalArguments.withArguments( |
| "${declaredMember.enclosingClass.name}." |
| "${declaredMember.name.text}", |
| "${interfaceMember.enclosingClass.name}." |
| "${interfaceMember.name.text}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMember.name.text) |
| .withLocation(interfaceMember.fileUri, |
| interfaceMember.fileOffset, noLength) |
| ]); |
| } |
| if (interfaceFunction.requiredParameterCount < |
| declaredFunction.requiredParameterCount) { |
| reportInvalidOverride( |
| isInterfaceCheck, |
| declaredMember, |
| templateOverrideMoreRequiredArguments.withArguments( |
| "${declaredMember.enclosingClass.name}." |
| "${declaredMember.name.text}", |
| "${interfaceMember.enclosingClass.name}." |
| "${interfaceMember.name.text}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMember.name.text) |
| .withLocation(interfaceMember.fileUri, |
| interfaceMember.fileOffset, noLength) |
| ]); |
| } |
| for (int i = 0; |
| i < declaredFunction.positionalParameters.length && |
| i < interfaceFunction.positionalParameters.length; |
| i++) { |
| VariableDeclaration declaredParameter = |
| declaredFunction.positionalParameters[i]; |
| VariableDeclaration interfaceParameter = |
| interfaceFunction.positionalParameters[i]; |
| if (i == 0 && |
| declaredMember.name == equalsName && |
| declaredParameter.type == |
| types.hierarchy.coreTypes.objectNonNullableRawType && |
| interfaceParameter.type is DynamicType) { |
| // TODO(johnniwinther): Add check for opt-in overrides of operator ==. |
| // `operator ==` methods in opt-out classes have type |
| // `bool Function(dynamic)`. |
| continue; |
| } |
| |
| _checkTypes( |
| types, |
| interfaceSubstitution, |
| declaredSubstitution, |
| declaredMember, |
| interfaceMember, |
| interfaceMemberOrigin, |
| declaredParameter.type, |
| interfaceParameter.type, |
| declaredParameter.isCovariant || interfaceParameter.isCovariant, |
| declaredParameter, |
| isInterfaceCheck); |
| if (declaredParameter.isCovariant) seenCovariant = true; |
| } |
| if (declaredFunction.namedParameters.isEmpty && |
| interfaceFunction.namedParameters.isEmpty) { |
| return seenCovariant; |
| } |
| if (declaredFunction.namedParameters.length < |
| interfaceFunction.namedParameters.length) { |
| reportInvalidOverride( |
| isInterfaceCheck, |
| declaredMember, |
| templateOverrideFewerNamedArguments.withArguments( |
| "${declaredMember.enclosingClass.name}." |
| "${declaredMember.name.text}", |
| "${interfaceMemberOrigin.enclosingClass.name}." |
| "${interfaceMemberOrigin.name.text}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMemberOrigin.name.text) |
| .withLocation(interfaceMemberOrigin.fileUri, |
| interfaceMemberOrigin.fileOffset, noLength) |
| ]); |
| } |
| int compareNamedParameters(VariableDeclaration p0, VariableDeclaration p1) { |
| return p0.name.compareTo(p1.name); |
| } |
| |
| List<VariableDeclaration> sortedFromDeclared = |
| new List.from(declaredFunction.namedParameters) |
| ..sort(compareNamedParameters); |
| List<VariableDeclaration> sortedFromInterface = |
| new List.from(interfaceFunction.namedParameters) |
| ..sort(compareNamedParameters); |
| Iterator<VariableDeclaration> declaredNamedParameters = |
| sortedFromDeclared.iterator; |
| Iterator<VariableDeclaration> interfaceNamedParameters = |
| sortedFromInterface.iterator; |
| outer: |
| while (declaredNamedParameters.moveNext() && |
| interfaceNamedParameters.moveNext()) { |
| while (declaredNamedParameters.current.name != |
| interfaceNamedParameters.current.name) { |
| if (!declaredNamedParameters.moveNext()) { |
| reportInvalidOverride( |
| isInterfaceCheck, |
| declaredMember, |
| templateOverrideMismatchNamedParameter.withArguments( |
| "${declaredMember.enclosingClass.name}." |
| "${declaredMember.name.text}", |
| interfaceNamedParameters.current.name, |
| "${interfaceMember.enclosingClass.name}." |
| "${interfaceMember.name.text}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMember.name.text) |
| .withLocation(interfaceMember.fileUri, |
| interfaceMember.fileOffset, noLength) |
| ]); |
| break outer; |
| } |
| } |
| VariableDeclaration declaredParameter = declaredNamedParameters.current; |
| _checkTypes( |
| types, |
| interfaceSubstitution, |
| declaredSubstitution, |
| declaredMember, |
| interfaceMember, |
| interfaceMemberOrigin, |
| declaredParameter.type, |
| interfaceNamedParameters.current.type, |
| declaredParameter.isCovariant, |
| declaredParameter, |
| isInterfaceCheck); |
| if (declaredMember.isNonNullableByDefault && |
| declaredParameter.isRequired && |
| interfaceMember.isNonNullableByDefault && |
| !interfaceNamedParameters.current.isRequired) { |
| reportInvalidOverride( |
| isInterfaceCheck, |
| declaredMember, |
| templateOverrideMismatchRequiredNamedParameter.withArguments( |
| declaredParameter.name, |
| "${declaredMember.enclosingClass.name}." |
| "${declaredMember.name.text}", |
| "${interfaceMember.enclosingClass.name}." |
| "${interfaceMember.name.text}"), |
| declaredParameter.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMemberOrigin.name.text) |
| .withLocation(_getMemberUri(interfaceMemberOrigin), |
| interfaceMemberOrigin.fileOffset, noLength) |
| ]); |
| } |
| if (declaredParameter.isCovariant) seenCovariant = true; |
| } |
| return seenCovariant; |
| } |
| |
| /// Checks whether [declaredMember] correctly overrides [interfaceMember]. |
| /// |
| /// If an error is reporter [interfaceMemberOrigin] is used as the context |
| /// for where [interfaceMember] was declared, since [interfaceMember] might |
| /// itself be synthesized. |
| void checkGetterOverride( |
| Types types, |
| Member declaredMember, |
| Member interfaceMember, |
| Member interfaceMemberOrigin, |
| bool isInterfaceCheck) { |
| Substitution interfaceSubstitution = _computeInterfaceSubstitution( |
| types, |
| declaredMember, |
| interfaceMember, |
| interfaceMemberOrigin, |
| /* declaredFunction = */ null, |
| /* interfaceFunction = */ null, |
| isInterfaceCheck); |
| Substitution declaredSubstitution = |
| _computeDeclaredSubstitution(types, declaredMember); |
| DartType declaredType = declaredMember.getterType; |
| DartType interfaceType = interfaceMember.getterType; |
| _checkTypes( |
| types, |
| interfaceSubstitution, |
| declaredSubstitution, |
| declaredMember, |
| interfaceMember, |
| interfaceMemberOrigin, |
| declaredType, |
| interfaceType, |
| /* isCovariant = */ false, |
| /* declaredParameter = */ null, |
| isInterfaceCheck); |
| } |
| |
| /// Checks whether [declaredMember] correctly overrides [interfaceMember]. |
| /// |
| /// If an error is reporter [interfaceMemberOrigin] is used as the context |
| /// for where [interfaceMember] was declared, since [interfaceMember] might |
| /// itself be synthesized. |
| /// |
| /// Returns whether a covariant parameter was seen and more methods thus have |
| /// to be checked. |
| bool checkSetterOverride( |
| Types types, |
| Member declaredMember, |
| Member interfaceMember, |
| Member interfaceMemberOrigin, |
| bool isInterfaceCheck) { |
| Substitution interfaceSubstitution = _computeInterfaceSubstitution( |
| types, |
| declaredMember, |
| interfaceMember, |
| interfaceMemberOrigin, |
| /* declaredFunction = */ null, |
| /* interfaceFunction = */ null, |
| isInterfaceCheck); |
| Substitution declaredSubstitution = |
| _computeDeclaredSubstitution(types, declaredMember); |
| DartType declaredType = declaredMember.setterType; |
| DartType interfaceType = interfaceMember.setterType; |
| VariableDeclaration declaredParameter = |
| declaredMember.function?.positionalParameters?.elementAt(0); |
| bool isCovariant = declaredParameter?.isCovariant ?? false; |
| if (!isCovariant && declaredMember is Field) { |
| isCovariant = declaredMember.isCovariant; |
| } |
| if (!isCovariant && interfaceMember is Field) { |
| isCovariant = interfaceMember.isCovariant; |
| } |
| _checkTypes( |
| types, |
| interfaceSubstitution, |
| declaredSubstitution, |
| declaredMember, |
| interfaceMember, |
| interfaceMemberOrigin, |
| declaredType, |
| interfaceType, |
| isCovariant, |
| declaredParameter, |
| isInterfaceCheck, |
| asIfDeclaredParameter: true); |
| return isCovariant; |
| } |
| |
| // When the overriding member is inherited, report the class containing |
| // the conflict as the main error. |
| void reportInvalidOverride(bool isInterfaceCheck, Member declaredMember, |
| Message message, int fileOffset, int length, |
| {List<LocatedMessage> context}) { |
| if (shouldOverrideProblemBeOverlooked(this)) { |
| return; |
| } |
| |
| if (declaredMember.enclosingClass == cls) { |
| // Ordinary override |
| library.addProblem(message, fileOffset, length, declaredMember.fileUri, |
| context: context); |
| } else { |
| context = [ |
| message.withLocation(declaredMember.fileUri, fileOffset, length), |
| ...?context |
| ]; |
| if (isInterfaceCheck) { |
| // Interface check |
| library.addProblem( |
| templateInterfaceCheck.withArguments( |
| declaredMember.name.text, cls.name), |
| cls.fileOffset, |
| cls.name.length, |
| cls.fileUri, |
| context: context); |
| } else { |
| if (cls.isAnonymousMixin) { |
| // Implicit mixin application class |
| String baseName = cls.superclass.demangledName; |
| String mixinName = cls.mixedInClass.name; |
| int classNameLength = cls.nameAsMixinApplicationSubclass.length; |
| library.addProblem( |
| templateImplicitMixinOverride.withArguments( |
| mixinName, baseName, declaredMember.name.text), |
| cls.fileOffset, |
| classNameLength, |
| cls.fileUri, |
| context: context); |
| } else { |
| // Named mixin application class |
| library.addProblem( |
| templateNamedMixinOverride.withArguments( |
| cls.name, declaredMember.name.text), |
| cls.fileOffset, |
| cls.name.length, |
| cls.fileUri, |
| context: context); |
| } |
| } |
| } |
| } |
| } |
| |
| /// Returns `true` if override problems should be overlooked. |
| /// |
| /// This is needed for the current encoding of some JavaScript implementation |
| /// classes that are not valid Dart. For instance `JSInt` in |
| /// 'dart:_interceptors' that implements both `int` and `double`, and `JsArray` |
| /// in `dart:js` that implement both `ListMixin` and `JsObject`. |
| bool shouldOverrideProblemBeOverlooked(ClassBuilder classBuilder) { |
| String uri = '${classBuilder.library.importUri}'; |
| return uri == 'dart:js' && |
| classBuilder.fileUri.pathSegments.last == 'js.dart' || |
| uri == 'dart:_interceptors' && |
| classBuilder.fileUri.pathSegments.last == 'js_number.dart'; |
| } |
