| // 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, |
| DartType, |
| Expression, |
| ExpressionStatement, |
| Field, |
| InterfaceType, |
| ListLiteral, |
| Member, |
| Name, |
| StaticGet, |
| StringLiteral, |
| Supertype, |
| Throw; |
| |
| import '../errors.dart' show internalError; |
| |
| import '../messages.dart' show warning; |
| |
| import 'kernel_builder.dart' |
| show |
| Builder, |
| ClassBuilder, |
| ConstructorReferenceBuilder, |
| KernelLibraryBuilder, |
| KernelProcedureBuilder, |
| KernelTypeBuilder, |
| LibraryBuilder, |
| MetadataBuilder, |
| ProcedureBuilder, |
| TypeVariableBuilder, |
| computeDefaultTypeArguments; |
| |
| import '../dill/dill_member_builder.dart' show DillMemberBuilder; |
| |
| import 'redirecting_factory_body.dart' show RedirectingFactoryBody; |
| |
| abstract class KernelClassBuilder |
| extends ClassBuilder<KernelTypeBuilder, InterfaceType> { |
| KernelClassBuilder( |
| List<MetadataBuilder> metadata, |
| int modifiers, |
| String name, |
| List<TypeVariableBuilder> typeVariables, |
| KernelTypeBuilder supertype, |
| List<KernelTypeBuilder> interfaces, |
| Map<String, Builder> members, |
| LibraryBuilder parent, |
| int charOffset) |
| : super(metadata, modifiers, name, typeVariables, supertype, interfaces, |
| members, parent, charOffset); |
| |
| Class get cls; |
| |
| Class get target => cls; |
| |
| /// [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); |
| } |
| |
| List<DartType> buildTypeArguments( |
| LibraryBuilder library, List<KernelTypeBuilder> arguments) { |
| List<DartType> typeArguments = <DartType>[]; |
| for (KernelTypeBuilder builder in arguments) { |
| DartType type = builder.build(library); |
| if (type == null) { |
| internalError("Bad type: ${builder.runtimeType}"); |
| } |
| typeArguments.add(type); |
| } |
| return computeDefaultTypeArguments( |
| library, cls.typeParameters, typeArguments); |
| } |
| |
| InterfaceType buildType( |
| LibraryBuilder library, List<KernelTypeBuilder> arguments) { |
| List<DartType> typeArguments; |
| if (arguments != null) { |
| typeArguments = buildTypeArguments(library, arguments); |
| } |
| return buildTypesWithBuiltArguments(library, typeArguments); |
| } |
| |
| Supertype buildSupertype( |
| LibraryBuilder library, List<KernelTypeBuilder> arguments) { |
| if (arguments != null) { |
| return new Supertype(cls, buildTypeArguments(library, arguments)); |
| } else { |
| return cls.asRawSupertype; |
| } |
| } |
| |
| int resolveConstructors(KernelLibraryBuilder library) { |
| int count = super.resolveConstructors(library); |
| if (count != 0) { |
| // Copy keys to avoid concurrent modification error. |
| List<String> names = members.keys.toList(); |
| for (String name in names) { |
| Builder builder = members[name]; |
| if (builder is KernelProcedureBuilder && builder.isFactory) { |
| // Compute the immediate redirection target, not the effective. |
| ConstructorReferenceBuilder redirectionTarget = |
| builder.redirectionTarget; |
| if (redirectionTarget != null) { |
| assert(builder.actualBody == null); |
| Builder targetBuilder = redirectionTarget.target; |
| addRedirectingConstructor(builder, library); |
| if (targetBuilder is ProcedureBuilder) { |
| Member target = targetBuilder.target; |
| builder.body = new RedirectingFactoryBody(target); |
| } else if (targetBuilder is DillMemberBuilder) { |
| builder.body = new RedirectingFactoryBody(targetBuilder.member); |
| } else { |
| // TODO(ahe): Throw NSM error. This requires access to core |
| // types. |
| String message = "Redirection constructor target not found: " |
| "${redirectionTarget.fullNameForErrors}"; |
| warning(library.fileUri, -1, message); |
| builder.body = new ExpressionStatement( |
| new Throw(new StringLiteral(message))); |
| } |
| } |
| } |
| } |
| } |
| 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): Generate the correct factory body instead. |
| DillMemberBuilder constructorsField = |
| members.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); |
| } |
| } |