| // 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.enum_builder; |
| |
| import 'package:_fe_analyzer_shared/src/parser/formal_parameter_kind.dart'; |
| import 'package:_fe_analyzer_shared/src/scanner/token.dart'; |
| |
| import 'package:kernel/ast.dart'; |
| import 'package:kernel/class_hierarchy.dart'; |
| import 'package:kernel/core_types.dart'; |
| import 'package:kernel/reference_from_index.dart' show IndexedClass; |
| |
| import '../builder/builder.dart'; |
| import '../builder/class_builder.dart'; |
| import '../builder/constructor_reference_builder.dart'; |
| import '../builder/formal_parameter_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/omitted_type_builder.dart'; |
| import '../builder/procedure_builder.dart'; |
| import '../builder/type_builder.dart'; |
| import '../builder/type_declaration_builder.dart'; |
| import '../builder/type_variable_builder.dart'; |
| import '../fasta_codes.dart' |
| show |
| LocatedMessage, |
| Severity, |
| messageEnumContainsValuesDeclaration, |
| messageEnumNonConstConstructor, |
| messageNoUnnamedConstructorInObject, |
| noLength, |
| templateConstructorNotFound, |
| templateDuplicatedDeclaration, |
| templateDuplicatedDeclarationCause, |
| templateDuplicatedDeclarationSyntheticCause, |
| templateEnumContainsRestrictedInstanceDeclaration, |
| templateEnumConstantSameNameAsEnclosing; |
| |
| import '../kernel/body_builder.dart'; |
| import '../kernel/constness.dart'; |
| import '../kernel/constructor_tearoff_lowering.dart'; |
| import '../kernel/expression_generator_helper.dart'; |
| import '../kernel/kernel_helper.dart'; |
| import '../kernel/implicit_field_type.dart'; |
| import '../kernel/internal_ast.dart'; |
| |
| import '../modifier.dart' show constMask, hasInitializerMask, staticMask; |
| |
| import '../constant_context.dart'; |
| import '../scope.dart'; |
| import '../type_inference/type_inferrer.dart'; |
| import '../type_inference/type_schema.dart'; |
| import '../util/helpers.dart'; |
| import 'name_scheme.dart'; |
| import 'source_class_builder.dart' show SourceClassBuilder; |
| import 'source_constructor_builder.dart'; |
| import 'source_field_builder.dart'; |
| import 'source_library_builder.dart' show SourceLibraryBuilder; |
| import 'source_procedure_builder.dart'; |
| |
| class SourceEnumBuilder extends SourceClassBuilder { |
| final List<EnumConstantInfo?>? enumConstantInfos; |
| |
| final NamedTypeBuilder intType; |
| |
| final NamedTypeBuilder stringType; |
| |
| final NamedTypeBuilder objectType; |
| |
| final NamedTypeBuilder listType; |
| |
| final NamedTypeBuilder selfType; |
| |
| DeclaredSourceConstructorBuilder? synthesizedDefaultConstructorBuilder; |
| |
| final List<SourceFieldBuilder> elementBuilders; |
| |
| final Set<SourceFieldBuilder> _builtElements = |
| new Set<SourceFieldBuilder>.identity(); |
| |
| final List<DelayedActionPerformer> _delayedActionPerformers = []; |
| |
| SourceEnumBuilder.internal( |
| List<MetadataBuilder>? metadata, |
| String name, |
| List<TypeVariableBuilder>? typeVariables, |
| TypeBuilder supertypeBuilder, |
| List<TypeBuilder>? interfaceBuilders, |
| Scope scope, |
| ConstructorScope constructors, |
| Class cls, |
| this.elementBuilders, |
| this.enumConstantInfos, |
| this.intType, |
| this.listType, |
| this.objectType, |
| this.stringType, |
| this.selfType, |
| SourceLibraryBuilder parent, |
| List<ConstructorReferenceBuilder> constructorReferences, |
| int startCharOffset, |
| int charOffset, |
| int charEndOffset, |
| IndexedClass? referencesFromIndexed) |
| : super( |
| metadata, |
| 0, |
| name, |
| typeVariables, |
| supertypeBuilder, |
| interfaceBuilders, |
| /* onTypes = */ null, |
| scope, |
| constructors, |
| parent, |
| constructorReferences, |
| startCharOffset, |
| charOffset, |
| charEndOffset, |
| referencesFromIndexed, |
| cls: cls); |
| |
| factory SourceEnumBuilder( |
| List<MetadataBuilder>? metadata, |
| String name, |
| List<TypeVariableBuilder>? typeVariables, |
| TypeBuilder? supertypeBuilder, |
| List<TypeBuilder>? interfaceBuilders, |
| List<EnumConstantInfo?>? enumConstantInfos, |
| SourceLibraryBuilder libraryBuilder, |
| List<ConstructorReferenceBuilder> constructorReferences, |
| int startCharOffset, |
| int charOffset, |
| int charEndOffset, |
| IndexedClass? referencesFromIndexed, |
| Scope scope, |
| ConstructorScope constructorScope) { |
| assert(enumConstantInfos == null || enumConstantInfos.isNotEmpty); |
| |
| Uri fileUri = libraryBuilder.fileUri; |
| |
| // TODO(ahe): These types shouldn't be looked up in scope, they come |
| // directly from dart:core. |
| NamedTypeBuilder intType = new NamedTypeBuilder( |
| "int", const NullabilityBuilder.omitted(), |
| instanceTypeVariableAccess: |
| // If "int" resolves to an instance type variable then that we would |
| // allowed (the types that we are adding are in instance context |
| // after all) but it would be unexpected and we would like an |
| // assertion failure, since "int" was meant to be `int` from |
| // `dart:core`. |
| // TODO(johnniwinther): Add a more robust way of creating named |
| // typed builders for dart:core types. This might be needed for the |
| // enhanced enums feature where enums can actually declare type |
| // variables. |
| InstanceTypeVariableAccessState.Unexpected); |
| NamedTypeBuilder stringType = new NamedTypeBuilder( |
| "String", const NullabilityBuilder.omitted(), |
| instanceTypeVariableAccess: InstanceTypeVariableAccessState.Unexpected); |
| NamedTypeBuilder objectType = new NamedTypeBuilder( |
| "Object", const NullabilityBuilder.omitted(), |
| instanceTypeVariableAccess: InstanceTypeVariableAccessState.Unexpected); |
| supertypeBuilder ??= new NamedTypeBuilder( |
| "_Enum", const NullabilityBuilder.omitted(), |
| instanceTypeVariableAccess: InstanceTypeVariableAccessState.Unexpected); |
| Class cls = new Class( |
| name: name, |
| typeParameters: |
| TypeVariableBuilder.typeParametersFromBuilders(typeVariables), |
| reference: referencesFromIndexed?.cls.reference, |
| fileUri: fileUri); |
| Map<String, MemberBuilder> members = <String, MemberBuilder>{}; |
| Map<String, MemberBuilder> setters = <String, MemberBuilder>{}; |
| Map<String, MemberBuilder> constructors = <String, MemberBuilder>{}; |
| List<SourceFieldBuilder> elementBuilders = <SourceFieldBuilder>[]; |
| NamedTypeBuilder selfType = new NamedTypeBuilder( |
| name, const NullabilityBuilder.omitted(), |
| instanceTypeVariableAccess: InstanceTypeVariableAccessState.Unexpected, |
| fileUri: fileUri, |
| charOffset: charOffset); |
| NamedTypeBuilder listType = new NamedTypeBuilder( |
| "List", const NullabilityBuilder.omitted(), |
| arguments: <TypeBuilder>[selfType], |
| instanceTypeVariableAccess: InstanceTypeVariableAccessState.Unexpected); |
| |
| // metadata class E extends _Enum { |
| // const E(int index, String name) : super(index, name); |
| // static const E id0 = const E(0, 'id0'); |
| // ... |
| // static const E id${n-1} = const E(n - 1, 'idn-1'); |
| // static const List<E> values = const <E>[id0, ..., id${n-1}]; |
| // String toString() { |
| // return "E.${_Enum::_name}"; |
| // } |
| // } |
| |
| NameScheme staticFieldNameScheme = new NameScheme( |
| isInstanceMember: false, |
| className: name, |
| isExtensionMember: false, |
| extensionName: null, |
| libraryReference: referencesFromIndexed != null |
| ? referencesFromIndexed.library.reference |
| : libraryBuilder.library.reference); |
| |
| NameScheme procedureNameScheme = new NameScheme( |
| isInstanceMember: true, |
| className: name, |
| isExtensionMember: false, |
| extensionName: null, |
| libraryReference: referencesFromIndexed != null |
| ? referencesFromIndexed.library.reference |
| : libraryBuilder.library.reference); |
| |
| Reference? constructorReference; |
| Reference? tearOffReference; |
| Reference? toStringReference; |
| Reference? valuesFieldReference; |
| Reference? valuesGetterReference; |
| Reference? valuesSetterReference; |
| if (referencesFromIndexed != null) { |
| constructorReference = |
| referencesFromIndexed.lookupConstructorReference(new Name("")); |
| tearOffReference = referencesFromIndexed.lookupGetterReference( |
| constructorTearOffName("", referencesFromIndexed.library)); |
| toStringReference = |
| referencesFromIndexed.lookupGetterReference(new Name("toString")); |
| Name valuesName = new Name("values"); |
| valuesFieldReference = |
| referencesFromIndexed.lookupFieldReference(valuesName); |
| valuesGetterReference = |
| referencesFromIndexed.lookupGetterReference(valuesName); |
| valuesSetterReference = |
| referencesFromIndexed.lookupSetterReference(valuesName); |
| } |
| |
| Builder? customValuesDeclaration = |
| scope.lookupLocalMember("values", setter: false); |
| if (customValuesDeclaration != null) { |
| // Retrieve the earliest declaration for error reporting. |
| while (customValuesDeclaration?.next != null) { |
| customValuesDeclaration = customValuesDeclaration?.next; |
| } |
| libraryBuilder.addProblem( |
| messageEnumContainsValuesDeclaration, |
| customValuesDeclaration!.charOffset, |
| customValuesDeclaration.fullNameForErrors.length, |
| fileUri); |
| } |
| |
| for (String restrictedInstanceMemberName in const [ |
| "index", |
| "hashCode", |
| "==" |
| ]) { |
| Builder? customIndexDeclaration = |
| scope.lookupLocalMember(restrictedInstanceMemberName, setter: false); |
| if (customIndexDeclaration is MemberBuilder && |
| !customIndexDeclaration.isAbstract) { |
| // Retrieve the earliest declaration for error reporting. |
| while (customIndexDeclaration?.next != null) { |
| customIndexDeclaration = customIndexDeclaration?.next; |
| } |
| libraryBuilder.addProblem( |
| templateEnumContainsRestrictedInstanceDeclaration |
| .withArguments(restrictedInstanceMemberName), |
| customIndexDeclaration!.charOffset, |
| customIndexDeclaration.fullNameForErrors.length, |
| fileUri); |
| } |
| } |
| |
| SourceFieldBuilder valuesBuilder = new SourceFieldBuilder( |
| /* metadata = */ null, |
| listType, |
| "values", |
| constMask | staticMask | hasInitializerMask, |
| /* isTopLevel = */ false, |
| libraryBuilder, |
| charOffset, |
| charOffset, |
| staticFieldNameScheme, |
| fieldReference: valuesFieldReference, |
| fieldGetterReference: valuesGetterReference, |
| fieldSetterReference: valuesSetterReference, |
| isSynthesized: true); |
| members["values"] = valuesBuilder; |
| |
| DeclaredSourceConstructorBuilder? synthesizedDefaultConstructorBuilder; |
| |
| // The default constructor is added if no generative or unnamed factory |
| // constructors are declared. |
| bool needsSynthesizedDefaultConstructor = true; |
| if (constructorScope.local.isNotEmpty) { |
| for (MemberBuilder constructorBuilder in constructorScope.local.values) { |
| if (!constructorBuilder.isFactory || constructorBuilder.name == "") { |
| needsSynthesizedDefaultConstructor = false; |
| break; |
| } |
| } |
| } |
| |
| if (needsSynthesizedDefaultConstructor) { |
| synthesizedDefaultConstructorBuilder = |
| new DeclaredSourceConstructorBuilder( |
| /* metadata = */ null, |
| constMask, |
| /* returnType = */ const OmittedTypeBuilder(), |
| "", |
| /* typeParameters = */ null, |
| <FormalParameterBuilder>[ |
| new FormalParameterBuilder( |
| null, |
| FormalParameterKind.requiredPositional, |
| 0, |
| intType, |
| "#index", |
| libraryBuilder, |
| charOffset), |
| new FormalParameterBuilder( |
| null, |
| FormalParameterKind.requiredPositional, |
| 0, |
| stringType, |
| "#name", |
| libraryBuilder, |
| charOffset) |
| ], |
| libraryBuilder, |
| charOffset, |
| charOffset, |
| charOffset, |
| charEndOffset, |
| constructorReference, |
| tearOffReference, |
| forAbstractClassOrEnum: true); |
| synthesizedDefaultConstructorBuilder |
| .registerInitializedField(valuesBuilder); |
| constructors[""] = synthesizedDefaultConstructorBuilder; |
| } else { |
| constructorScope.forEach((name, member) { |
| if (member is DeclaredSourceConstructorBuilder) { |
| member.ensureGrowableFormals(); |
| member.formals!.insert( |
| 0, |
| new FormalParameterBuilder( |
| /* metadata = */ null, |
| FormalParameterKind.requiredPositional, |
| /* modifiers = */ 0, |
| stringType, |
| "#name", |
| libraryBuilder, |
| charOffset)); |
| member.formals!.insert( |
| 0, |
| new FormalParameterBuilder( |
| /* metadata = */ null, |
| FormalParameterKind.requiredPositional, |
| /* modifiers = */ 0, |
| intType, |
| "#index", |
| libraryBuilder, |
| charOffset)); |
| } |
| }); |
| } |
| |
| if (scope.lookupLocalMember("toString", setter: false) == null) { |
| ProcedureBuilder toStringBuilder = new SourceProcedureBuilder( |
| /* metadata = */ null, |
| 0, |
| stringType, |
| "toString", |
| /* typeVariables = */ null, |
| /* formals = */ null, |
| ProcedureKind.Method, |
| libraryBuilder, |
| charOffset, |
| charOffset, |
| charOffset, |
| charEndOffset, |
| toStringReference, |
| /* tearOffReference = */ null, |
| AsyncMarker.Sync, |
| procedureNameScheme, |
| isExtensionMember: false, |
| isInstanceMember: true, |
| isSynthetic: true); |
| members["toString"] = toStringBuilder; |
| } |
| String className = name; |
| final int startCharOffsetComputed = |
| metadata == null ? startCharOffset : metadata.first.charOffset; |
| scope.forEachLocalMember((name, member) { |
| if (name != "values") { |
| members[name] = member as MemberBuilder; |
| } |
| }); |
| scope.forEachLocalSetter((name, member) { |
| setters[name] = member; |
| }); |
| |
| if (enumConstantInfos != null) { |
| for (int i = 0; i < enumConstantInfos.length; i++) { |
| EnumConstantInfo enumConstantInfo = enumConstantInfos[i]!; |
| List<MetadataBuilder>? metadata = enumConstantInfo.metadata; |
| String name = enumConstantInfo.name; |
| MemberBuilder? existing = members[name]; |
| if (existing != null) { |
| // The existing declaration is synthetic if it has the same |
| // charOffset as the enclosing enum. |
| bool isSynthetic = existing.charOffset == charOffset; |
| |
| // Report the error on the member that occurs later in the code. |
| int existingOffset; |
| int duplicateOffset; |
| if (existing.charOffset < enumConstantInfo.charOffset) { |
| existingOffset = existing.charOffset; |
| duplicateOffset = enumConstantInfo.charOffset; |
| } else { |
| existingOffset = enumConstantInfo.charOffset; |
| duplicateOffset = existing.charOffset; |
| } |
| |
| List<LocatedMessage> context = isSynthetic |
| ? <LocatedMessage>[ |
| templateDuplicatedDeclarationSyntheticCause |
| .withArguments(name) |
| .withLocation( |
| libraryBuilder.fileUri, charOffset, className.length) |
| ] |
| : <LocatedMessage>[ |
| templateDuplicatedDeclarationCause |
| .withArguments(name) |
| .withLocation( |
| libraryBuilder.fileUri, existingOffset, name.length) |
| ]; |
| libraryBuilder.addProblem( |
| templateDuplicatedDeclaration.withArguments(name), |
| duplicateOffset, |
| name.length, |
| libraryBuilder.fileUri, |
| context: context); |
| enumConstantInfos[i] = null; |
| } else if (name == className) { |
| libraryBuilder.addProblem( |
| templateEnumConstantSameNameAsEnclosing.withArguments(name), |
| enumConstantInfo.charOffset, |
| name.length, |
| libraryBuilder.fileUri); |
| } |
| Reference? fieldReference; |
| Reference? getterReference; |
| Reference? setterReference; |
| if (referencesFromIndexed != null) { |
| Name nameName = new Name(name, referencesFromIndexed.library); |
| fieldReference = referencesFromIndexed.lookupFieldReference(nameName); |
| getterReference = |
| referencesFromIndexed.lookupGetterReference(nameName); |
| setterReference = |
| referencesFromIndexed.lookupSetterReference(nameName); |
| } |
| SourceFieldBuilder fieldBuilder = new SourceFieldBuilder( |
| metadata, |
| const OmittedTypeBuilder(), |
| name, |
| constMask | staticMask | hasInitializerMask, |
| /* isTopLevel = */ false, |
| libraryBuilder, |
| enumConstantInfo.charOffset, |
| enumConstantInfo.charOffset, |
| staticFieldNameScheme, |
| fieldReference: fieldReference, |
| fieldGetterReference: getterReference, |
| fieldSetterReference: setterReference); |
| fieldBuilder.fieldType = new ImplicitFieldType( |
| fieldBuilder, enumConstantInfo.argumentsBeginToken); |
| libraryBuilder.registerImplicitlyTypedField(fieldBuilder); |
| members[name] = fieldBuilder..next = existing; |
| elementBuilders.add(fieldBuilder); |
| } |
| } |
| |
| SourceEnumBuilder enumBuilder = new SourceEnumBuilder.internal( |
| metadata, |
| name, |
| typeVariables, |
| supertypeBuilder, |
| interfaceBuilders, |
| new Scope( |
| local: members, |
| setters: setters, |
| parent: scope.parent, |
| debugName: "enum $name", |
| isModifiable: false), |
| constructorScope..local.addAll(constructors), |
| cls, |
| elementBuilders, |
| enumConstantInfos, |
| intType, |
| listType, |
| objectType, |
| stringType, |
| selfType, |
| libraryBuilder, |
| constructorReferences, |
| startCharOffsetComputed, |
| charOffset, |
| charEndOffset, |
| referencesFromIndexed) |
| ..synthesizedDefaultConstructorBuilder = |
| synthesizedDefaultConstructorBuilder; |
| |
| void setParent(String name, MemberBuilder? builder) { |
| while (builder != null) { |
| builder.parent = enumBuilder; |
| builder = builder.next as MemberBuilder?; |
| } |
| } |
| |
| members.forEach(setParent); |
| constructorScope.local.forEach(setParent); |
| selfType.bind(libraryBuilder, enumBuilder); |
| |
| if (constructorScope.local.isNotEmpty) { |
| for (MemberBuilder constructorBuilder in constructorScope.local.values) { |
| if (!constructorBuilder.isFactory && !constructorBuilder.isConst) { |
| libraryBuilder.addProblem(messageEnumNonConstConstructor, |
| constructorBuilder.charOffset, noLength, fileUri); |
| } |
| } |
| } |
| |
| return enumBuilder; |
| } |
| |
| @override |
| bool get isEnum => true; |
| |
| @override |
| TypeBuilder? get mixedInTypeBuilder => null; |
| |
| NamedTypeBuilder? _computeEnumSupertype() { |
| TypeBuilder? supertypeBuilder = this.supertypeBuilder; |
| NamedTypeBuilder? enumType; |
| |
| while (enumType == null && supertypeBuilder is NamedTypeBuilder) { |
| TypeDeclarationBuilder? superclassBuilder = supertypeBuilder.declaration; |
| if (superclassBuilder is ClassBuilder && |
| superclassBuilder.isMixinApplication) { |
| supertypeBuilder = superclassBuilder.supertypeBuilder; |
| } else { |
| enumType = supertypeBuilder; |
| } |
| } |
| assert(enumType is NamedTypeBuilder && enumType.name == "_Enum"); |
| return enumType; |
| } |
| |
| @override |
| Class build(LibraryBuilder coreLibrary) { |
| cls.isEnum = true; |
| intType.resolveIn(coreLibrary.scope, charOffset, fileUri, libraryBuilder); |
| stringType.resolveIn( |
| coreLibrary.scope, charOffset, fileUri, libraryBuilder); |
| objectType.resolveIn( |
| coreLibrary.scope, charOffset, fileUri, libraryBuilder); |
| NamedTypeBuilder? enumType = _computeEnumSupertype(); |
| enumType!.resolveIn(coreLibrary.scope, charOffset, fileUri, libraryBuilder); |
| |
| listType.resolveIn(coreLibrary.scope, charOffset, fileUri, libraryBuilder); |
| |
| List<Expression> values = <Expression>[]; |
| if (enumConstantInfos != null) { |
| for (EnumConstantInfo? enumConstantInfo in enumConstantInfos!) { |
| if (enumConstantInfo != null) { |
| Builder declaration = firstMemberNamed(enumConstantInfo.name)!; |
| if (declaration.isField) { |
| SourceFieldBuilder fieldBuilder = declaration as SourceFieldBuilder; |
| fieldBuilder.build(); |
| values.add(new StaticGet(fieldBuilder.field)); |
| } |
| } |
| } |
| } |
| SourceFieldBuilder valuesBuilder = |
| firstMemberNamed("values") as SourceFieldBuilder; |
| valuesBuilder.build(); |
| |
| // The super initializer for the synthesized default constructor is |
| // inserted here if the enum's supertype is _Enum to preserve the legacy |
| // behavior or having the old-style enum constants built in the outlines. |
| // Other constructors are handled in [BodyBuilder.finishConstructor] as |
| // they are processed via the pipeline for constructor parsing and |
| // building. |
| if (identical(this.supertypeBuilder, enumType)) { |
| if (synthesizedDefaultConstructorBuilder != null) { |
| Constructor constructor = synthesizedDefaultConstructorBuilder!.build(); |
| ClassBuilder objectClass = objectType.declaration as ClassBuilder; |
| ClassBuilder enumClass = enumType.declaration as ClassBuilder; |
| MemberBuilder? superConstructor = enumClass.findConstructorOrFactory( |
| "", charOffset, fileUri, libraryBuilder); |
| if (superConstructor == null || !superConstructor.isConstructor) { |
| // TODO(ahe): Ideally, we would also want to check that [Object]'s |
| // unnamed constructor requires no arguments. But that information |
| // isn't always available at this point, and it's not really a |
| // situation that can happen unless you start modifying the SDK |
| // sources. (We should add a correct message. We no longer depend on |
| // Object here.) |
| libraryBuilder.addProblem( |
| messageNoUnnamedConstructorInObject, |
| objectClass.charOffset, |
| objectClass.name.length, |
| objectClass.fileUri); |
| } else { |
| constructor.initializers.add(new SuperInitializer( |
| superConstructor.member as Constructor, |
| new Arguments.forwarded( |
| constructor.function, libraryBuilder.library)) |
| ..parent = constructor); |
| } |
| synthesizedDefaultConstructorBuilder = null; |
| } |
| } |
| |
| return super.build(coreLibrary); |
| } |
| |
| DartType buildElement(SourceFieldBuilder fieldBuilder, CoreTypes coreTypes) { |
| DartType selfType = |
| this.selfType.build(libraryBuilder, TypeUse.enumSelfType); |
| Builder? builder = firstMemberNamed(fieldBuilder.name); |
| if (builder == null || !builder.isField) return selfType; |
| fieldBuilder = builder as SourceFieldBuilder; |
| if (!_builtElements.add(fieldBuilder)) return fieldBuilder.fieldType; |
| |
| if (enumConstantInfos == null) return selfType; |
| |
| String constant = fieldBuilder.name; |
| |
| EnumConstantInfo? enumConstantInfo; |
| int elementIndex = 0; |
| for (EnumConstantInfo? info in enumConstantInfos!) { |
| if (info?.name == constant) { |
| enumConstantInfo = info; |
| break; |
| } |
| // Skip the duplicated entries in numbering. |
| if (info?.name != null) { |
| elementIndex++; |
| } |
| } |
| if (enumConstantInfo == null) return selfType; |
| |
| DartType inferredFieldType = selfType; |
| |
| String constructorName = |
| enumConstantInfo.constructorReferenceBuilder?.suffix ?? ""; |
| String fullConstructorNameForErrors = |
| enumConstantInfo.constructorReferenceBuilder?.fullNameForErrors ?? name; |
| int fileOffset = enumConstantInfo.constructorReferenceBuilder?.charOffset ?? |
| enumConstantInfo.charOffset; |
| MemberBuilder? constructorBuilder = |
| constructorScope.lookupLocalMember(constructorName); |
| |
| ArgumentsImpl arguments; |
| List<Expression> enumSyntheticArguments = <Expression>[ |
| new IntLiteral(elementIndex), |
| new StringLiteral(constant), |
| ]; |
| List<DartType>? typeArguments; |
| List<TypeBuilder>? typeArgumentBuilders = |
| enumConstantInfo.constructorReferenceBuilder?.typeArguments; |
| if (typeArgumentBuilders != null) { |
| typeArguments = <DartType>[]; |
| for (TypeBuilder typeBuilder in typeArgumentBuilders) { |
| typeArguments.add( |
| typeBuilder.build(libraryBuilder, TypeUse.constructorTypeArgument)); |
| } |
| } |
| if (libraryBuilder.libraryFeatures.enhancedEnums.isEnabled) { |
| // We need to create a BodyBuilder to solve the following: 1) if |
| // the arguments token is provided, we'll use the BodyBuilder to |
| // parse them and perform inference, 2) if the type arguments |
| // aren't provided, but required, we'll use it to infer them, and |
| // 3) in case of erroneous code the constructor invocation should |
| // be built via a body builder to detect potential errors. |
| BodyBuilder bodyBuilder = libraryBuilder.loader |
| .createBodyBuilderForOutlineExpression( |
| libraryBuilder, this, this, scope, fileUri); |
| bodyBuilder.constantContext = ConstantContext.inferred; |
| |
| if (enumConstantInfo.argumentsBeginToken != null) { |
| arguments = |
| bodyBuilder.parseArguments(enumConstantInfo.argumentsBeginToken!); |
| bodyBuilder.performBacklogComputations(_delayedActionPerformers); |
| |
| arguments.positional.insertAll(0, enumSyntheticArguments); |
| arguments.argumentsOriginalOrder?.insertAll(0, enumSyntheticArguments); |
| } else { |
| arguments = new ArgumentsImpl(enumSyntheticArguments); |
| } |
| if (typeArguments != null) { |
| ArgumentsImpl.setNonInferrableArgumentTypes(arguments, typeArguments); |
| } else if (cls.typeParameters.isNotEmpty) { |
| arguments.types.addAll(new List<DartType>.filled( |
| cls.typeParameters.length, const UnknownType())); |
| } |
| setParents(enumSyntheticArguments, arguments); |
| if (constructorBuilder == null || |
| constructorBuilder is! SourceConstructorBuilder) { |
| if (!fieldBuilder.hasBodyBeenBuilt) { |
| fieldBuilder.buildBody( |
| coreTypes, |
| bodyBuilder.buildUnresolvedError(new NullLiteral(), |
| fullConstructorNameForErrors, arguments, fileOffset, |
| kind: UnresolvedKind.Constructor)); |
| } |
| } else { |
| Expression initializer = bodyBuilder.buildStaticInvocation( |
| constructorBuilder.constructor, arguments, |
| constness: Constness.explicitConst, |
| charOffset: fieldBuilder.charOffset); |
| ExpressionInferenceResult inferenceResult = bodyBuilder.typeInferrer |
| .inferFieldInitializer( |
| bodyBuilder, const UnknownType(), initializer); |
| initializer = inferenceResult.expression; |
| inferredFieldType = inferenceResult.inferredType; |
| if (!fieldBuilder.hasBodyBeenBuilt) { |
| fieldBuilder.buildBody(coreTypes, initializer); |
| } |
| } |
| } else { |
| arguments = new ArgumentsImpl(enumSyntheticArguments); |
| setParents(enumSyntheticArguments, arguments); |
| if (constructorBuilder == null || |
| constructorBuilder is! SourceConstructorBuilder || |
| !constructorBuilder.isConst) { |
| // This can only occur if there enhanced enum features are used |
| // when they are not enabled. |
| assert(libraryBuilder.loader.hasSeenError); |
| String text = libraryBuilder.loader.target.context |
| .format( |
| templateConstructorNotFound |
| .withArguments(fullConstructorNameForErrors) |
| .withLocation(fieldBuilder.fileUri, fileOffset, noLength), |
| Severity.error) |
| .plain; |
| if (!fieldBuilder.hasBodyBeenBuilt) { |
| fieldBuilder.buildBody( |
| coreTypes, new InvalidExpression(text)..fileOffset = charOffset); |
| } |
| } else { |
| Expression initializer = new ConstructorInvocation( |
| constructorBuilder.constructor, arguments, |
| isConst: true) |
| ..fileOffset = fieldBuilder.charOffset; |
| if (!fieldBuilder.hasBodyBeenBuilt) { |
| fieldBuilder.buildBody(coreTypes, initializer); |
| } |
| } |
| } |
| |
| return inferredFieldType; |
| } |
| |
| @override |
| void buildOutlineExpressions( |
| ClassHierarchy classHierarchy, |
| List<DelayedActionPerformer> delayedActionPerformers, |
| List<DelayedDefaultValueCloner> delayedDefaultValueCloners) { |
| List<Expression> values = <Expression>[]; |
| if (enumConstantInfos != null) { |
| for (EnumConstantInfo? enumConstantInfo in enumConstantInfos!) { |
| if (enumConstantInfo != null) { |
| Builder declaration = firstMemberNamed(enumConstantInfo.name)!; |
| if (declaration.isField) { |
| SourceFieldBuilder fieldBuilder = declaration as SourceFieldBuilder; |
| fieldBuilder.build(); |
| values.add(new StaticGet(fieldBuilder.field)); |
| } |
| } |
| } |
| } |
| SourceFieldBuilder valuesBuilder = |
| firstMemberNamed("values") as SourceFieldBuilder; |
| valuesBuilder.buildBody( |
| classHierarchy.coreTypes, |
| new ListLiteral(values, |
| typeArgument: rawType(libraryBuilder.nonNullable), isConst: true)); |
| |
| for (SourceFieldBuilder elementBuilder in elementBuilders) { |
| elementBuilder.fieldType = |
| buildElement(elementBuilder, classHierarchy.coreTypes); |
| } |
| delayedActionPerformers.addAll(_delayedActionPerformers); |
| _delayedActionPerformers.clear(); |
| |
| SourceProcedureBuilder toStringBuilder = |
| firstMemberNamed("toString") as SourceProcedureBuilder; |
| |
| ClassBuilder enumClass = |
| _computeEnumSupertype()!.declaration as ClassBuilder; |
| MemberBuilder? nameFieldBuilder = |
| enumClass.lookupLocalMember("_name") as MemberBuilder?; |
| assert(nameFieldBuilder != null); |
| Field nameField = nameFieldBuilder!.member as Field; |
| |
| toStringBuilder.body = new ReturnStatement(new StringConcatenation([ |
| new StringLiteral("${cls.demangledName}."), |
| new InstanceGet.byReference( |
| InstanceAccessKind.Instance, new ThisExpression(), nameField.name, |
| interfaceTargetReference: nameField.getterReference, |
| resultType: nameField.getterType), |
| ])); |
| |
| super.buildOutlineExpressions( |
| classHierarchy, delayedActionPerformers, delayedDefaultValueCloners); |
| } |
| } |
| |
| class EnumConstantInfo { |
| final List<MetadataBuilder>? metadata; |
| final String name; |
| final int charOffset; |
| ConstructorReferenceBuilder? constructorReferenceBuilder; |
| Token? argumentsBeginToken; |
| |
| EnumConstantInfo(this.metadata, this.name, this.charOffset); |
| } |
