| // 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.kernel_class_builder; |
| |
| import 'package:kernel/ast.dart' |
| show |
| Class, |
| Constructor, |
| ThisExpression, |
| DartType, |
| DynamicType, |
| Expression, |
| Field, |
| FunctionNode, |
| InterfaceType, |
| AsExpression, |
| ListLiteral, |
| Member, |
| Name, |
| Procedure, |
| ReturnStatement, |
| VoidType, |
| MethodInvocation, |
| ProcedureKind, |
| StaticGet, |
| Supertype, |
| TypeParameter, |
| TypeParameterType, |
| Arguments, |
| VariableDeclaration; |
| |
| import 'package:kernel/class_hierarchy.dart' show ClassHierarchy; |
| |
| import 'package:kernel/clone.dart' show CloneWithoutBody; |
| |
| import 'package:kernel/core_types.dart' show CoreTypes; |
| |
| import 'package:kernel/type_algebra.dart' show Substitution, getSubstitutionMap; |
| |
| import 'package:kernel/type_environment.dart' show TypeEnvironment; |
| |
| import '../dill/dill_member_builder.dart' show DillMemberBuilder; |
| |
| import '../fasta_codes.dart' |
| show |
| LocatedMessage, |
| Message, |
| messageImplementsFutureOr, |
| messagePatchClassOrigin, |
| messagePatchClassTypeVariablesMismatch, |
| messagePatchDeclarationMismatch, |
| messagePatchDeclarationOrigin, |
| noLength, |
| templateImplementsRepeated, |
| templateImplementsSuperClass, |
| templateMissingImplementationCause, |
| templateMissingImplementationNotAbstract, |
| templateOverriddenMethodCause, |
| templateOverrideFewerNamedArguments, |
| templateOverrideFewerPositionalArguments, |
| templateOverrideMismatchNamedParameter, |
| templateOverrideMoreRequiredArguments, |
| templateOverrideTypeMismatchParameter, |
| templateOverrideTypeMismatchReturnType, |
| templateOverrideTypeVariablesMismatch, |
| templateRedirectionTargetNotFound, |
| templateTypeArgumentMismatch; |
| |
| import '../names.dart' show noSuchMethodName; |
| |
| import '../problems.dart' show unexpected, unhandled, unimplemented; |
| |
| import '../type_inference/type_schema.dart' show UnknownType; |
| |
| import 'kernel_builder.dart' |
| show |
| ClassBuilder, |
| ConstructorReferenceBuilder, |
| Declaration, |
| KernelLibraryBuilder, |
| KernelProcedureBuilder, |
| KernelRedirectingFactoryBuilder, |
| KernelNamedTypeBuilder, |
| KernelTypeBuilder, |
| KernelTypeVariableBuilder, |
| LibraryBuilder, |
| MemberBuilder, |
| MetadataBuilder, |
| ProcedureBuilder, |
| Scope, |
| TypeVariableBuilder; |
| |
| import 'redirecting_factory_body.dart' show RedirectingFactoryBody; |
| |
| import 'kernel_target.dart' show KernelTarget; |
| |
| abstract class KernelClassBuilder |
| extends ClassBuilder<KernelTypeBuilder, InterfaceType> { |
| KernelClassBuilder actualOrigin; |
| |
| KernelClassBuilder( |
| List<MetadataBuilder> metadata, |
| int modifiers, |
| String name, |
| List<TypeVariableBuilder> typeVariables, |
| KernelTypeBuilder supertype, |
| List<KernelTypeBuilder> interfaces, |
| Scope scope, |
| Scope constructors, |
| LibraryBuilder parent, |
| int charOffset) |
| : super(metadata, modifiers, name, typeVariables, supertype, interfaces, |
| scope, constructors, parent, charOffset); |
| |
| Class get cls; |
| |
| Class get target => cls; |
| |
| Class get actualCls; |
| |
| @override |
| KernelClassBuilder get origin => actualOrigin ?? this; |
| |
| /// [arguments] have already been built. |
| InterfaceType buildTypesWithBuiltArguments( |
| LibraryBuilder library, List<DartType> arguments) { |
| assert(arguments == null || cls.typeParameters.length == arguments.length); |
| return arguments == null ? cls.rawType : new InterfaceType(cls, arguments); |
| } |
| |
| @override |
| int get typeVariablesCount => typeVariables?.length ?? 0; |
| |
| List<DartType> buildTypeArguments( |
| LibraryBuilder library, List<KernelTypeBuilder> arguments) { |
| if (arguments == null && typeVariables == null) { |
| return <DartType>[]; |
| } |
| |
| if (arguments == null && typeVariables != null) { |
| List<DartType> result = |
| new List<DartType>.filled(typeVariables.length, null, growable: true); |
| for (int i = 0; i < result.length; ++i) { |
| result[i] = typeVariables[i].defaultType.build(library); |
| } |
| return result; |
| } |
| |
| if (arguments != null && arguments.length != (typeVariables?.length ?? 0)) { |
| // That should be caught and reported as a compile-time error earlier. |
| return unhandled( |
| templateTypeArgumentMismatch |
| .withArguments(typeVariables.length) |
| .message, |
| "buildTypeArguments", |
| -1, |
| null); |
| } |
| |
| // arguments.length == typeVariables.length |
| List<DartType> result = |
| new List<DartType>.filled(arguments.length, null, growable: true); |
| for (int i = 0; i < result.length; ++i) { |
| result[i] = arguments[i].build(library); |
| } |
| return result; |
| } |
| |
| /// If [arguments] are null, the default types for the variables are used. |
| InterfaceType buildType( |
| LibraryBuilder library, List<KernelTypeBuilder> arguments) { |
| return buildTypesWithBuiltArguments( |
| library, buildTypeArguments(library, arguments)); |
| } |
| |
| Supertype buildSupertype( |
| LibraryBuilder library, List<KernelTypeBuilder> arguments) { |
| Class cls = isPatch ? origin.target : this.cls; |
| return new Supertype(cls, buildTypeArguments(library, arguments)); |
| } |
| |
| Supertype buildMixedInType( |
| LibraryBuilder library, List<KernelTypeBuilder> arguments) { |
| Class cls = isPatch ? origin.target : this.cls; |
| if (arguments != null) { |
| return new Supertype(cls, buildTypeArguments(library, arguments)); |
| } else { |
| return new Supertype( |
| cls, |
| new List<DartType>.filled( |
| cls.typeParameters.length, const UnknownType(), |
| growable: true)); |
| } |
| } |
| |
| void checkSupertypes(CoreTypes coreTypes) { |
| // This method determines whether the class (that's being built) its super |
| // class appears both in 'extends' and 'implements' clauses and whether any |
| // interface appears multiple times in the 'implements' clause. |
| if (interfaces == null) return; |
| |
| // Extract super class (if it exists). |
| ClassBuilder superClass; |
| KernelTypeBuilder superClassType = supertype; |
| if (superClassType is KernelNamedTypeBuilder) { |
| Declaration decl = superClassType.declaration; |
| if (decl is ClassBuilder) { |
| superClass = decl; |
| } |
| } |
| |
| // Validate interfaces. |
| Map<ClassBuilder, int> problems; |
| Map<ClassBuilder, int> problemsOffsets; |
| Set<ClassBuilder> implemented = new Set<ClassBuilder>(); |
| for (KernelTypeBuilder type in interfaces) { |
| if (type is KernelNamedTypeBuilder) { |
| int charOffset = -1; // TODO(ahe): Get offset from type. |
| Declaration decl = type.declaration; |
| if (decl is ClassBuilder) { |
| ClassBuilder interface = decl; |
| if (superClass == interface) { |
| addCompileTimeError( |
| templateImplementsSuperClass.withArguments(interface.name), |
| charOffset, |
| noLength); |
| } else if (implemented.contains(interface)) { |
| // Aggregate repetitions. |
| problems ??= new Map<ClassBuilder, int>(); |
| problems[interface] ??= 0; |
| problems[interface] += 1; |
| |
| problemsOffsets ??= new Map<ClassBuilder, int>(); |
| problemsOffsets[interface] ??= charOffset; |
| } else if (interface.target == coreTypes.futureOrClass) { |
| addCompileTimeError(messageImplementsFutureOr, charOffset, |
| interface.target.name.length); |
| } else { |
| implemented.add(interface); |
| } |
| } |
| } |
| } |
| if (problems != null) { |
| problems.forEach((ClassBuilder interface, int repetitions) { |
| addCompileTimeError( |
| templateImplementsRepeated.withArguments( |
| interface.name, repetitions), |
| problemsOffsets[interface], |
| noLength); |
| }); |
| } |
| } |
| |
| @override |
| int resolveConstructors(LibraryBuilder library) { |
| int count = super.resolveConstructors(library); |
| 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) { |
| Declaration declaration = constructors[name]; |
| if (declaration.parent != this) { |
| unexpected( |
| "$fileUri", "${declaration.parent.fileUri}", charOffset, fileUri); |
| } |
| if (declaration is KernelRedirectingFactoryBuilder) { |
| // Compute the immediate redirection target, not the effective. |
| ConstructorReferenceBuilder redirectionTarget = |
| declaration.redirectionTarget; |
| if (redirectionTarget != null) { |
| Declaration targetBuilder = redirectionTarget.target; |
| addRedirectingConstructor(declaration, library); |
| if (targetBuilder is ProcedureBuilder) { |
| 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.target.enclosingClass.typeParameters.length, |
| const DynamicType(), |
| growable: true); |
| } |
| declaration.setRedirectingFactoryBody( |
| targetBuilder.target, 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.target.enclosingClass.typeParameters.length, |
| const DynamicType(), |
| growable: true); |
| } |
| declaration.setRedirectingFactoryBody( |
| targetBuilder.member, typeArguments); |
| } else { |
| var message = templateRedirectionTargetNotFound |
| .withArguments(redirectionTarget.fullNameForErrors); |
| if (declaration.isConst) { |
| addCompileTimeError(message, declaration.charOffset, noLength); |
| } else { |
| addProblem(message, declaration.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); |
| } |
| } |
| } |
| } |
| } |
| return count; |
| } |
| |
| void addRedirectingConstructor( |
| KernelProcedureBuilder constructor, KernelLibraryBuilder library) { |
| // 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.local.putIfAbsent("_redirecting#", () { |
| ListLiteral literal = new ListLiteral(<Expression>[]); |
| Name name = new Name("_redirecting#", library.library); |
| Field field = new Field(name, |
| isStatic: true, initializer: literal, fileUri: cls.fileUri) |
| ..fileOffset = cls.fileOffset; |
| cls.addMember(field); |
| return new DillMemberBuilder(field, this); |
| }); |
| Field field = constructorsField.target; |
| ListLiteral literal = field.initializer; |
| literal.expressions |
| .add(new StaticGet(constructor.target)..parent = literal); |
| } |
| |
| void checkOverrides( |
| ClassHierarchy hierarchy, TypeEnvironment typeEnvironment) { |
| handleSeenCovariant( |
| Member declaredMember, |
| Member interfaceMember, |
| bool isSetter, |
| callback( |
| Member declaredMember, Member interfaceMember, bool isSetter)) { |
| // When a parameter is covariant we have to check that we also |
| // override the same member in all parents. |
| for (Supertype supertype in interfaceMember.enclosingClass.supers) { |
| Member m = hierarchy.getInterfaceMember( |
| supertype.classNode, interfaceMember.name, |
| setter: isSetter); |
| if (m != null) { |
| callback(declaredMember, m, isSetter); |
| } |
| } |
| } |
| |
| overridePairCallback( |
| Member declaredMember, Member interfaceMember, bool isSetter) { |
| 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 == ProcedureKind.Method && |
| interfaceMember.kind == ProcedureKind.Method) { |
| bool seenCovariant = checkMethodOverride( |
| hierarchy, typeEnvironment, declaredMember, interfaceMember); |
| if (seenCovariant) { |
| handleSeenCovariant(declaredMember, interfaceMember, isSetter, |
| overridePairCallback); |
| } |
| } |
| if (declaredMember.kind == ProcedureKind.Getter && |
| interfaceMember.kind == ProcedureKind.Getter) { |
| checkGetterOverride( |
| hierarchy, typeEnvironment, declaredMember, interfaceMember); |
| } |
| if (declaredMember.kind == ProcedureKind.Setter && |
| interfaceMember.kind == ProcedureKind.Setter) { |
| bool seenCovariant = checkSetterOverride( |
| hierarchy, typeEnvironment, declaredMember, interfaceMember); |
| if (seenCovariant) { |
| handleSeenCovariant(declaredMember, interfaceMember, isSetter, |
| overridePairCallback); |
| } |
| } |
| } 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 is Procedure && declaredMember.isSetter; |
| bool interfaceMemberHasSetter = interfaceMember is Field || |
| interfaceMember is Procedure && interfaceMember.isSetter; |
| if (declaredMemberHasGetter && interfaceMemberHasGetter) { |
| checkGetterOverride( |
| hierarchy, typeEnvironment, declaredMember, interfaceMember); |
| } else if (declaredMemberHasSetter && interfaceMemberHasSetter) { |
| bool seenCovariant = checkSetterOverride( |
| hierarchy, typeEnvironment, declaredMember, interfaceMember); |
| if (seenCovariant) { |
| handleSeenCovariant(declaredMember, interfaceMember, isSetter, |
| overridePairCallback); |
| } |
| } |
| } |
| // TODO(ahe): Handle other cases: accessors, operators, and fields. |
| } |
| |
| hierarchy.forEachOverridePair(cls, overridePairCallback); |
| } |
| |
| void checkAbstractMembers(CoreTypes coreTypes, ClassHierarchy hierarchy) { |
| if (isAbstract) { |
| // Unimplemented members allowed |
| return; |
| } |
| |
| List<LocatedMessage> context = null; |
| |
| bool mustHaveImplementation(Member member) { |
| // Public member |
| if (!member.name.isPrivate) return true; |
| // Private member in different library |
| if (member.enclosingLibrary != cls.enclosingLibrary) return false; |
| // Private member in patch |
| if (member.fileUri != member.enclosingClass.fileUri) return false; |
| // Private member in same library |
| return true; |
| } |
| |
| bool isValidImplementation(Member interfaceMember, Member dispatchTarget, |
| {bool setters}) { |
| // If they're the exact same it's valid. |
| if (interfaceMember == dispatchTarget) return true; |
| |
| if (interfaceMember is Procedure && dispatchTarget is Procedure) { |
| // E.g. getter vs method. |
| if (interfaceMember.kind != dispatchTarget.kind) return false; |
| |
| if (dispatchTarget.function.positionalParameters.length < |
| interfaceMember.function.requiredParameterCount || |
| dispatchTarget.function.positionalParameters.length < |
| interfaceMember.function.positionalParameters.length) |
| return false; |
| |
| if (interfaceMember.function.requiredParameterCount < |
| dispatchTarget.function.requiredParameterCount) return false; |
| |
| if (dispatchTarget.function.namedParameters.length < |
| interfaceMember.function.namedParameters.length) return false; |
| |
| // Two Procedures of the same kind with the same number of parameters. |
| return true; |
| } |
| |
| if ((interfaceMember is Field || interfaceMember is Procedure) && |
| (dispatchTarget is Field || dispatchTarget is Procedure)) { |
| if (setters) { |
| bool interfaceMemberHasSetter = |
| (interfaceMember is Field && interfaceMember.hasSetter) || |
| interfaceMember is Procedure && interfaceMember.isSetter; |
| bool dispatchTargetHasSetter = |
| (dispatchTarget is Field && dispatchTarget.hasSetter) || |
| dispatchTarget is Procedure && dispatchTarget.isSetter; |
| // Combination of (settable) field and/or (procedure) setter is valid. |
| return interfaceMemberHasSetter && dispatchTargetHasSetter; |
| } else { |
| bool interfaceMemberHasGetter = interfaceMember is Field || |
| interfaceMember is Procedure && interfaceMember.isGetter; |
| bool dispatchTargetHasGetter = dispatchTarget is Field || |
| dispatchTarget is Procedure && dispatchTarget.isGetter; |
| // Combination of field and/or (procedure) getter is valid. |
| return interfaceMemberHasGetter && dispatchTargetHasGetter; |
| } |
| } |
| |
| return unhandled( |
| "${interfaceMember.runtimeType} and ${dispatchTarget.runtimeType}", |
| "isValidImplementation", |
| interfaceMember.fileOffset, |
| interfaceMember.fileUri); |
| } |
| |
| bool hasNoSuchMethod = |
| hierarchy.getDispatchTarget(cls, noSuchMethodName).enclosingClass != |
| coreTypes.objectClass; |
| |
| void findMissingImplementations({bool setters}) { |
| List<Member> dispatchTargets = |
| hierarchy.getDispatchTargets(cls, setters: setters); |
| int targetIndex = 0; |
| for (Member interfaceMember |
| in hierarchy.getInterfaceMembers(cls, setters: setters)) { |
| if (mustHaveImplementation(interfaceMember)) { |
| while (targetIndex < dispatchTargets.length && |
| ClassHierarchy.compareMembers( |
| dispatchTargets[targetIndex], interfaceMember) < |
| 0) { |
| targetIndex++; |
| } |
| bool foundTarget = targetIndex < dispatchTargets.length && |
| ClassHierarchy.compareMembers( |
| dispatchTargets[targetIndex], interfaceMember) <= |
| 0; |
| bool hasProblem = true; |
| if (foundTarget && |
| isValidImplementation( |
| interfaceMember, dispatchTargets[targetIndex], |
| setters: setters)) hasProblem = false; |
| if (hasNoSuchMethod && !foundTarget) hasProblem = false; |
| if (hasProblem) { |
| Name name = interfaceMember.name; |
| String displayName = name.name + (setters ? "=" : ""); |
| context ??= <LocatedMessage>[]; |
| context.add(templateMissingImplementationCause |
| .withArguments(displayName) |
| .withLocation(interfaceMember.fileUri, |
| interfaceMember.fileOffset, name.name.length)); |
| } |
| } |
| } |
| } |
| |
| findMissingImplementations(setters: false); |
| findMissingImplementations(setters: true); |
| |
| if (context?.isNotEmpty ?? false) { |
| String memberString = |
| context.map((message) => "'${message.arguments["name"]}'").join(", "); |
| library.addProblem( |
| templateMissingImplementationNotAbstract.withArguments( |
| cls.name, memberString), |
| cls.fileOffset, |
| cls.name.length, |
| cls.fileUri, |
| context: context); |
| } |
| } |
| |
| bool hasUserDefinedNoSuchMethod( |
| Class klass, ClassHierarchy hierarchy, Class objectClass) { |
| Member noSuchMethod = hierarchy.getDispatchTarget(klass, noSuchMethodName); |
| return noSuchMethod != null && noSuchMethod.enclosingClass != objectClass; |
| } |
| |
| void transformProcedureToNoSuchMethodForwarder( |
| Member noSuchMethodInterface, KernelTarget target, Procedure procedure) { |
| String prefix = |
| procedure.isGetter ? 'get:' : procedure.isSetter ? 'set:' : ''; |
| Expression invocation = target.backendTarget.instantiateInvocation( |
| target.loader.coreTypes, |
| new ThisExpression(), |
| prefix + procedure.name.name, |
| new Arguments.forwarded(procedure.function), |
| 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 |
| ..fileOffset = procedure.fileOffset; |
| } |
| procedure.function.body = new ReturnStatement(result) |
| ..fileOffset = procedure.fileOffset; |
| procedure.function.body.parent = procedure.function; |
| |
| procedure.isAbstract = false; |
| procedure.isNoSuchMethodForwarder = true; |
| procedure.isForwardingStub = false; |
| procedure.isForwardingSemiStub = false; |
| } |
| |
| void addNoSuchMethodForwarderForProcedure(Member noSuchMethod, |
| KernelTarget target, Procedure procedure, ClassHierarchy hierarchy) { |
| CloneWithoutBody cloner = new CloneWithoutBody( |
| typeSubstitution: getSubstitutionMap( |
| hierarchy.getClassAsInstanceOf(cls, procedure.enclosingClass)), |
| cloneAnnotations: false); |
| Procedure cloned = cloner.clone(procedure)..isExternal = false; |
| transformProcedureToNoSuchMethodForwarder(noSuchMethod, target, cloned); |
| cls.procedures.add(cloned); |
| cloned.parent = cls; |
| |
| KernelLibraryBuilder library = this.library; |
| library.forwardersOrigins.add(cloned); |
| library.forwardersOrigins.add(procedure); |
| } |
| |
| void addNoSuchMethodForwarderGetterForField(Member noSuchMethod, |
| KernelTarget target, Field field, ClassHierarchy hierarchy) { |
| Substitution substitution = Substitution.fromSupertype( |
| hierarchy.getClassAsInstanceOf(cls, field.enclosingClass)); |
| 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) |
| ..fileOffset = field.fileOffset; |
| transformProcedureToNoSuchMethodForwarder(noSuchMethod, target, getter); |
| cls.procedures.add(getter); |
| getter.parent = cls; |
| } |
| |
| void addNoSuchMethodForwarderSetterForField(Member noSuchMethod, |
| KernelTarget target, Field field, ClassHierarchy hierarchy) { |
| Substitution substitution = Substitution.fromSupertype( |
| hierarchy.getClassAsInstanceOf(cls, field.enclosingClass)); |
| 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) |
| ..fileOffset = field.fileOffset; |
| transformProcedureToNoSuchMethodForwarder(noSuchMethod, target, setter); |
| cls.procedures.add(setter); |
| setter.parent = cls; |
| } |
| |
| /// Adds noSuchMethod forwarding stubs to this class. Returns `true` if the |
| /// class was modified. |
| bool addNoSuchMethodForwarders( |
| KernelTarget target, ClassHierarchy hierarchy) { |
| if (cls.isAbstract || |
| !hasUserDefinedNoSuchMethod(cls, hierarchy, target.objectClass)) { |
| return false; |
| } |
| |
| Set<Name> existingForwardersNames = new Set<Name>(); |
| Set<Name> existingSetterForwardersNames = new Set<Name>(); |
| Class leastConcreteSuperclass = cls.superclass; |
| while ( |
| leastConcreteSuperclass != null && leastConcreteSuperclass.isAbstract) { |
| leastConcreteSuperclass = leastConcreteSuperclass.superclass; |
| } |
| if (leastConcreteSuperclass != null && |
| hasUserDefinedNoSuchMethod( |
| leastConcreteSuperclass, hierarchy, target.objectClass)) { |
| List<Member> concrete = |
| hierarchy.getDispatchTargets(leastConcreteSuperclass); |
| for (Member member |
| in hierarchy.getInterfaceMembers(leastConcreteSuperclass)) { |
| if (ClassHierarchy.findMemberByName(concrete, member.name) == null) { |
| existingForwardersNames.add(member.name); |
| } |
| } |
| |
| List<Member> concreteSetters = |
| hierarchy.getDispatchTargets(leastConcreteSuperclass, setters: true); |
| for (Member member in hierarchy |
| .getInterfaceMembers(leastConcreteSuperclass, setters: true)) { |
| if (ClassHierarchy.findMemberByName(concreteSetters, member.name) == |
| null) { |
| existingSetterForwardersNames.add(member.name); |
| } |
| } |
| } |
| |
| Member noSuchMethod = ClassHierarchy.findMemberByName( |
| hierarchy.getInterfaceMembers(cls), noSuchMethodName); |
| |
| List<Member> concrete = hierarchy.getDispatchTargets(cls); |
| List<Member> declared = hierarchy.getDeclaredMembers(cls); |
| |
| bool changed = false; |
| for (Member member in hierarchy.getInterfaceMembers(cls)) { |
| if (member is Procedure && |
| ClassHierarchy.findMemberByName(concrete, member.name) == null && |
| !existingForwardersNames.contains(member.name)) { |
| if (ClassHierarchy.findMemberByName(declared, member.name) != null) { |
| transformProcedureToNoSuchMethodForwarder( |
| noSuchMethod, target, member); |
| } else { |
| addNoSuchMethodForwarderForProcedure( |
| noSuchMethod, target, member, hierarchy); |
| } |
| existingForwardersNames.add(member.name); |
| changed = true; |
| } |
| if (member is Field && |
| ClassHierarchy.findMemberByName(concrete, member.name) == null && |
| !existingForwardersNames.contains(member.name)) { |
| addNoSuchMethodForwarderGetterForField( |
| noSuchMethod, target, member, hierarchy); |
| existingForwardersNames.add(member.name); |
| changed = true; |
| } |
| } |
| |
| List<Member> concreteSetters = |
| hierarchy.getDispatchTargets(cls, setters: true); |
| List<Member> declaredSetters = |
| hierarchy.getDeclaredMembers(cls, setters: true); |
| for (Member member in hierarchy.getInterfaceMembers(cls, setters: true)) { |
| if (member is Procedure && |
| ClassHierarchy.findMemberByName(concreteSetters, member.name) == |
| null && |
| !existingSetterForwardersNames.contains(member.name)) { |
| if (ClassHierarchy.findMemberByName(declaredSetters, member.name) != |
| null) { |
| transformProcedureToNoSuchMethodForwarder( |
| noSuchMethod, target, member); |
| } else { |
| addNoSuchMethodForwarderForProcedure( |
| noSuchMethod, target, member, hierarchy); |
| } |
| existingSetterForwardersNames.add(member.name); |
| changed = true; |
| } |
| if (member is Field && |
| ClassHierarchy.findMemberByName(concreteSetters, member.name) == |
| null && |
| !existingSetterForwardersNames.contains(member.name)) { |
| addNoSuchMethodForwarderSetterForField( |
| noSuchMethod, target, member, hierarchy); |
| existingSetterForwardersNames.add(member.name); |
| changed = true; |
| } |
| } |
| |
| return changed; |
| } |
| |
| 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('${member.runtimeType}', '_getMemberUri', -1, null); |
| } |
| |
| Substitution _computeInterfaceSubstitution( |
| ClassHierarchy hierarchy, |
| Member declaredMember, |
| Member interfaceMember, |
| FunctionNode declaredFunction, |
| FunctionNode interfaceFunction) { |
| Substitution interfaceSubstitution; |
| if (interfaceMember.enclosingClass.typeParameters.isNotEmpty) { |
| interfaceSubstitution = Substitution.fromSupertype( |
| hierarchy.getClassAsInstanceOf(cls, interfaceMember.enclosingClass)); |
| } |
| if (declaredFunction?.typeParameters?.length != |
| interfaceFunction?.typeParameters?.length) { |
| addProblem( |
| templateOverrideTypeVariablesMismatch.withArguments( |
| "$name::${declaredMember.name.name}", |
| "${interfaceMember.enclosingClass.name}::" |
| "${interfaceMember.name.name}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMember.name.name) |
| .withLocation(_getMemberUri(interfaceMember), |
| interfaceMember.fileOffset, noLength) |
| ]); |
| } else if (library.loader.target.backendTarget.strongMode && |
| declaredFunction?.typeParameters != null) { |
| var substitutionMap = <TypeParameter, DartType>{}; |
| for (int i = 0; i < declaredFunction.typeParameters.length; ++i) { |
| substitutionMap[interfaceFunction.typeParameters[i]] = |
| new TypeParameterType(declaredFunction.typeParameters[i]); |
| } |
| Substitution substitution = Substitution.fromMap(substitutionMap); |
| for (int i = 0; i < declaredFunction.typeParameters.length; ++i) { |
| TypeParameter declaredParameter = declaredFunction.typeParameters[i]; |
| TypeParameter interfaceParameter = interfaceFunction.typeParameters[i]; |
| if (!interfaceParameter.isGenericCovariantImpl) { |
| DartType declaredBound = declaredParameter.bound; |
| DartType interfaceBound = interfaceParameter.bound; |
| if (interfaceSubstitution != null) { |
| declaredBound = interfaceSubstitution.substituteType(declaredBound); |
| interfaceBound = |
| interfaceSubstitution.substituteType(interfaceBound); |
| } |
| if (declaredBound != substitution.substituteType(interfaceBound)) { |
| addProblem( |
| templateOverrideTypeVariablesMismatch.withArguments( |
| "$name::${declaredMember.name.name}", |
| "${interfaceMember.enclosingClass.name}::" |
| "${interfaceMember.name.name}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMember.name.name) |
| .withLocation(_getMemberUri(interfaceMember), |
| interfaceMember.fileOffset, noLength) |
| ]); |
| } |
| } |
| } |
| interfaceSubstitution = interfaceSubstitution == null |
| ? substitution |
| : Substitution.combine(interfaceSubstitution, substitution); |
| } |
| return interfaceSubstitution; |
| } |
| |
| bool _checkTypes( |
| TypeEnvironment typeEnvironment, |
| Substitution interfaceSubstitution, |
| Member declaredMember, |
| Member interfaceMember, |
| DartType declaredType, |
| DartType interfaceType, |
| bool isCovariant, |
| VariableDeclaration declaredParameter, |
| {bool asIfDeclaredParameter = false}) { |
| if (!library.loader.target.backendTarget.strongMode) return false; |
| |
| if (interfaceSubstitution != null) { |
| interfaceType = interfaceSubstitution.substituteType(interfaceType); |
| } |
| |
| bool inParameter = declaredParameter != null || asIfDeclaredParameter; |
| DartType subtype = inParameter ? interfaceType : declaredType; |
| DartType supertype = inParameter ? declaredType : interfaceType; |
| |
| if (typeEnvironment.isSubtypeOf(subtype, supertype)) { |
| // No problem--the proper subtyping relation is satisfied. |
| } else if (isCovariant && typeEnvironment.isSubtypeOf(supertype, subtype)) { |
| // No problem--the overriding parameter is marked "covariant" and has |
| // a type which is a subtype of the parameter it overrides. |
| } else { |
| // Report an error. |
| var declaredMemberName = '$name::${declaredMember.name.name}'; |
| Message message; |
| int fileOffset; |
| if (declaredParameter == null) { |
| message = templateOverrideTypeMismatchReturnType.withArguments( |
| declaredMemberName, declaredType, interfaceType); |
| fileOffset = declaredMember.fileOffset; |
| } else { |
| message = templateOverrideTypeMismatchParameter.withArguments( |
| declaredParameter.name, |
| declaredMemberName, |
| declaredType, |
| interfaceType); |
| fileOffset = declaredParameter.fileOffset; |
| } |
| library.addCompileTimeError(message, fileOffset, noLength, fileUri, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMember.name.name) |
| .withLocation(_getMemberUri(interfaceMember), |
| interfaceMember.fileOffset, noLength) |
| ]); |
| return true; |
| } |
| return false; |
| } |
| |
| /// Returns whether a covariant parameter was seen and more methods thus have |
| /// to be checked. |
| bool checkMethodOverride( |
| ClassHierarchy hierarchy, |
| TypeEnvironment typeEnvironment, |
| Procedure declaredMember, |
| Procedure interfaceMember) { |
| if (declaredMember.enclosingClass != cls) { |
| // TODO(ahe): Include these checks as well, but the message needs to |
| // explain that [declaredMember] is inherited. |
| return false; |
| } |
| assert(declaredMember.kind == ProcedureKind.Method); |
| assert(interfaceMember.kind == ProcedureKind.Method); |
| bool seenCovariant = false; |
| FunctionNode declaredFunction = declaredMember.function; |
| FunctionNode interfaceFunction = interfaceMember.function; |
| |
| Substitution interfaceSubstitution = _computeInterfaceSubstitution( |
| hierarchy, |
| declaredMember, |
| interfaceMember, |
| declaredFunction, |
| interfaceFunction); |
| |
| _checkTypes( |
| typeEnvironment, |
| interfaceSubstitution, |
| declaredMember, |
| interfaceMember, |
| declaredFunction.returnType, |
| interfaceFunction.returnType, |
| false, |
| null); |
| if (declaredFunction.positionalParameters.length < |
| interfaceFunction.requiredParameterCount || |
| declaredFunction.positionalParameters.length < |
| interfaceFunction.positionalParameters.length) { |
| addProblem( |
| templateOverrideFewerPositionalArguments.withArguments( |
| "$name::${declaredMember.name.name}", |
| "${interfaceMember.enclosingClass.name}::" |
| "${interfaceMember.name.name}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMember.name.name) |
| .withLocation(interfaceMember.fileUri, |
| interfaceMember.fileOffset, noLength) |
| ]); |
| } |
| if (interfaceFunction.requiredParameterCount < |
| declaredFunction.requiredParameterCount) { |
| addProblem( |
| templateOverrideMoreRequiredArguments.withArguments( |
| "$name::${declaredMember.name.name}", |
| "${interfaceMember.enclosingClass.name}::" |
| "${interfaceMember.name.name}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMember.name.name) |
| .withLocation(interfaceMember.fileUri, |
| interfaceMember.fileOffset, noLength) |
| ]); |
| } |
| for (int i = 0; |
| i < declaredFunction.positionalParameters.length && |
| i < interfaceFunction.positionalParameters.length; |
| i++) { |
| var declaredParameter = declaredFunction.positionalParameters[i]; |
| _checkTypes( |
| typeEnvironment, |
| interfaceSubstitution, |
| declaredMember, |
| interfaceMember, |
| declaredParameter.type, |
| interfaceFunction.positionalParameters[i].type, |
| declaredParameter.isCovariant, |
| declaredParameter); |
| if (declaredParameter.isCovariant) seenCovariant = true; |
| } |
| if (declaredFunction.namedParameters.isEmpty && |
| interfaceFunction.namedParameters.isEmpty) { |
| return seenCovariant; |
| } |
| if (declaredFunction.namedParameters.length < |
| interfaceFunction.namedParameters.length) { |
| addProblem( |
| templateOverrideFewerNamedArguments.withArguments( |
| "$name::${declaredMember.name.name}", |
| "${interfaceMember.enclosingClass.name}::" |
| "${interfaceMember.name.name}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMember.name.name) |
| .withLocation(interfaceMember.fileUri, |
| interfaceMember.fileOffset, noLength) |
| ]); |
| } |
| int compareNamedParameters(VariableDeclaration p0, VariableDeclaration p1) { |
| return p0.name.compareTo(p1.name); |
| } |
| |
| List<VariableDeclaration> sortedFromDeclared = |
| new List.from(declaredFunction.namedParameters) |
| ..sort(compareNamedParameters); |
| List<VariableDeclaration> sortedFromInterface = |
| new List.from(interfaceFunction.namedParameters) |
| ..sort(compareNamedParameters); |
| Iterator<VariableDeclaration> declaredNamedParameters = |
| sortedFromDeclared.iterator; |
| Iterator<VariableDeclaration> interfaceNamedParameters = |
| sortedFromInterface.iterator; |
| outer: |
| while (declaredNamedParameters.moveNext() && |
| interfaceNamedParameters.moveNext()) { |
| while (declaredNamedParameters.current.name != |
| interfaceNamedParameters.current.name) { |
| if (!declaredNamedParameters.moveNext()) { |
| addProblem( |
| templateOverrideMismatchNamedParameter.withArguments( |
| "$name::${declaredMember.name.name}", |
| interfaceNamedParameters.current.name, |
| "${interfaceMember.enclosingClass.name}::" |
| "${interfaceMember.name.name}"), |
| declaredMember.fileOffset, |
| noLength, |
| context: [ |
| templateOverriddenMethodCause |
| .withArguments(interfaceMember.name.name) |
| .withLocation(interfaceMember.fileUri, |
| interfaceMember.fileOffset, noLength) |
| ]); |
| break outer; |
| } |
| } |
| var declaredParameter = declaredNamedParameters.current; |
| _checkTypes( |
| typeEnvironment, |
| interfaceSubstitution, |
| declaredMember, |
| interfaceMember, |
| declaredParameter.type, |
| interfaceNamedParameters.current.type, |
| declaredParameter.isCovariant, |
| declaredParameter); |
| if (declaredParameter.isCovariant) seenCovariant = true; |
| } |
| return seenCovariant; |
| } |
| |
| void checkGetterOverride( |
| ClassHierarchy hierarchy, |
| TypeEnvironment typeEnvironment, |
| Member declaredMember, |
| Member interfaceMember) { |
| if (declaredMember.enclosingClass != cls) { |
| // TODO(paulberry): Include these checks as well, but the message needs to |
| // explain that [declaredMember] is inherited. |
| return; |
| } |
| Substitution interfaceSubstitution = _computeInterfaceSubstitution( |
| hierarchy, declaredMember, interfaceMember, null, null); |
| var declaredType = declaredMember.getterType; |
| var interfaceType = interfaceMember.getterType; |
| _checkTypes(typeEnvironment, interfaceSubstitution, declaredMember, |
| interfaceMember, declaredType, interfaceType, false, null); |
| } |
| |
| /// Returns whether a covariant parameter was seen and more methods thus have |
| /// to be checked. |
| bool checkSetterOverride( |
| ClassHierarchy hierarchy, |
| TypeEnvironment typeEnvironment, |
| Member declaredMember, |
| Member interfaceMember) { |
| if (declaredMember.enclosingClass != cls) { |
| // TODO(paulberry): Include these checks as well, but the message needs to |
| // explain that [declaredMember] is inherited. |
| return false; |
| } |
| Substitution interfaceSubstitution = _computeInterfaceSubstitution( |
| hierarchy, declaredMember, interfaceMember, null, null); |
| var declaredType = declaredMember.setterType; |
| var interfaceType = interfaceMember.setterType; |
| var declaredParameter = |
| declaredMember.function?.positionalParameters?.elementAt(0); |
| bool isCovariant = declaredParameter?.isCovariant ?? false; |
| if (declaredMember is Field) isCovariant = declaredMember.isCovariant; |
| _checkTypes( |
| typeEnvironment, |
| interfaceSubstitution, |
| declaredMember, |
| interfaceMember, |
| declaredType, |
| interfaceType, |
| isCovariant, |
| declaredParameter, |
| asIfDeclaredParameter: true); |
| return isCovariant; |
| } |
| |
| String get fullNameForErrors { |
| return isMixinApplication |
| ? "${supertype.fullNameForErrors} with ${mixedInType.fullNameForErrors}" |
| : name; |
| } |
| |
| @override |
| void applyPatch(Declaration patch) { |
| if (patch is KernelClassBuilder) { |
| patch.actualOrigin = this; |
| // TODO(ahe): Complain if `patch.supertype` isn't null. |
| scope.local.forEach((String name, Declaration member) { |
| Declaration memberPatch = patch.scope.local[name]; |
| if (memberPatch != null) { |
| member.applyPatch(memberPatch); |
| } |
| }); |
| scope.setters.forEach((String name, Declaration member) { |
| Declaration memberPatch = patch.scope.setters[name]; |
| if (memberPatch != null) { |
| member.applyPatch(memberPatch); |
| } |
| }); |
| constructors.local.forEach((String name, Declaration member) { |
| Declaration memberPatch = patch.constructors.local[name]; |
| if (memberPatch != null) { |
| member.applyPatch(memberPatch); |
| } |
| }); |
| |
| int originLength = typeVariables?.length ?? 0; |
| int patchLength = patch.typeVariables?.length ?? 0; |
| if (originLength != patchLength) { |
| patch.addCompileTimeError(messagePatchClassTypeVariablesMismatch, |
| patch.charOffset, noLength, context: [ |
| messagePatchClassOrigin.withLocation(fileUri, charOffset, noLength) |
| ]); |
| } else if (typeVariables != null) { |
| int count = 0; |
| for (KernelTypeVariableBuilder t in patch.typeVariables) { |
| typeVariables[count++].applyPatch(t); |
| } |
| } |
| } else { |
| library.addCompileTimeError(messagePatchDeclarationMismatch, |
| patch.charOffset, noLength, patch.fileUri, context: [ |
| messagePatchDeclarationOrigin.withLocation( |
| fileUri, charOffset, noLength) |
| ]); |
| } |
| } |
| |
| @override |
| Declaration findStaticBuilder( |
| String name, int charOffset, Uri fileUri, LibraryBuilder accessingLibrary, |
| {bool isSetter: false}) { |
| Declaration declaration = super.findStaticBuilder( |
| name, charOffset, fileUri, accessingLibrary, |
| isSetter: isSetter); |
| if (declaration == null && isPatch) { |
| return origin.findStaticBuilder( |
| name, charOffset, fileUri, accessingLibrary, |
| isSetter: isSetter); |
| } |
| return declaration; |
| } |
| |
| @override |
| Declaration findConstructorOrFactory( |
| String name, int charOffset, Uri uri, LibraryBuilder accessingLibrary) { |
| Declaration declaration = |
| super.findConstructorOrFactory(name, charOffset, uri, accessingLibrary); |
| if (declaration == null && isPatch) { |
| return origin.findConstructorOrFactory( |
| name, charOffset, uri, accessingLibrary); |
| } |
| return declaration; |
| } |
| } |
