| // 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.procedure_builder; |
| |
| // Note: we're deliberately using AsyncMarker and ProcedureKind from kernel |
| // outside the kernel-specific builders. This is simpler than creating |
| // additional enums. |
| import 'package:kernel/ast.dart' |
| show AsyncMarker, ProcedureKind, VariableDeclaration; |
| |
| import 'package:kernel/type_algebra.dart' show containsTypeVariable, substitute; |
| import 'package:kernel/type_algebra.dart'; |
| |
| import 'builder.dart' |
| show |
| Builder, |
| FormalParameterBuilder, |
| LibraryBuilder, |
| MemberBuilder, |
| MetadataBuilder, |
| Scope, |
| TypeBuilder, |
| TypeVariableBuilder; |
| |
| import 'package:kernel/ast.dart' |
| show |
| Arguments, |
| AsyncMarker, |
| Class, |
| Constructor, |
| ConstructorInvocation, |
| DartType, |
| DynamicType, |
| EmptyStatement, |
| Expression, |
| FunctionNode, |
| Initializer, |
| InterfaceType, |
| Member, |
| Name, |
| Procedure, |
| ProcedureKind, |
| RedirectingInitializer, |
| Statement, |
| StaticInvocation, |
| StringLiteral, |
| SuperInitializer, |
| TypeParameter, |
| TypeParameterType, |
| VariableDeclaration, |
| setParents; |
| |
| import '../../scanner/token.dart' show Token; |
| |
| import '../constant_context.dart' show ConstantContext; |
| |
| import '../kernel/body_builder.dart' show BodyBuilder; |
| |
| import '../kernel/expression_generator_helper.dart' |
| show ExpressionGeneratorHelper; |
| |
| import '../kernel/kernel_builder.dart' |
| show |
| ClassBuilder, |
| ConstructorReferenceBuilder, |
| Builder, |
| FormalParameterBuilder, |
| LibraryBuilder, |
| MetadataBuilder, |
| TypeBuilder, |
| TypeVariableBuilder, |
| isRedirectingGenerativeConstructorImplementation; |
| |
| import '../kernel/kernel_shadow_ast.dart' show VariableDeclarationJudgment; |
| |
| import '../kernel/redirecting_factory_body.dart' show RedirectingFactoryBody; |
| |
| import '../loader.dart' show Loader; |
| |
| import '../messages.dart' |
| show |
| Message, |
| messageConstFactoryRedirectionToNonConst, |
| messageMoreThanOneSuperOrThisInitializer, |
| messageNonInstanceTypeVariableUse, |
| messagePatchDeclarationMismatch, |
| messagePatchDeclarationOrigin, |
| messagePatchNonExternal, |
| messageSuperInitializerNotLast, |
| messageThisInitializerNotAlone, |
| noLength; |
| |
| import '../problems.dart' show unexpected; |
| |
| import '../source/source_library_builder.dart' show SourceLibraryBuilder; |
| |
| import '../type_inference/type_inference_engine.dart' |
| show IncludesTypeParametersNonCovariantly, Variance; |
| |
| /// Common base class for constructor and procedure builders. |
| abstract class FunctionBuilder extends MemberBuilder { |
| final List<MetadataBuilder> metadata; |
| |
| final int modifiers; |
| |
| final TypeBuilder returnType; |
| |
| final String name; |
| |
| final List<TypeVariableBuilder> typeVariables; |
| |
| final List<FormalParameterBuilder> formals; |
| |
| /// If this procedure is an instance member declared in an extension |
| /// declaration, [extensionThis] holds the synthetically added `this` |
| /// parameter. |
| VariableDeclaration extensionThis; |
| |
| FunctionBuilder( |
| this.metadata, |
| this.modifiers, |
| this.returnType, |
| this.name, |
| this.typeVariables, |
| this.formals, |
| LibraryBuilder compilationUnit, |
| int charOffset, |
| this.nativeMethodName) |
| : super(compilationUnit, charOffset) { |
| if (formals != null) { |
| for (int i = 0; i < formals.length; i++) { |
| formals[i].parent = this; |
| } |
| } |
| } |
| |
| String get debugName => "FunctionBuilder"; |
| |
| AsyncMarker get asyncModifier; |
| |
| ProcedureKind get kind; |
| |
| bool get isConstructor => false; |
| |
| bool get isRegularMethod => identical(ProcedureKind.Method, kind); |
| |
| bool get isGetter => identical(ProcedureKind.Getter, kind); |
| |
| bool get isSetter => identical(ProcedureKind.Setter, kind); |
| |
| bool get isOperator => identical(ProcedureKind.Operator, kind); |
| |
| bool get isFactory => identical(ProcedureKind.Factory, kind); |
| |
| /// This is the formal parameter scope as specified in the Dart Programming |
| /// Language Specification, 4th ed, section 9.2. |
| Scope computeFormalParameterScope(Scope parent) { |
| if (formals == null) return parent; |
| Map<String, Builder> local = <String, Builder>{}; |
| for (FormalParameterBuilder formal in formals) { |
| if (!isConstructor || !formal.isInitializingFormal) { |
| local[formal.name] = formal; |
| } |
| } |
| return new Scope(local, null, parent, "formal parameter", |
| isModifiable: false); |
| } |
| |
| Scope computeFormalParameterInitializerScope(Scope parent) { |
| // From |
| // [dartLangSpec.tex](../../../../../../docs/language/dartLangSpec.tex) at |
| // revision 94b23d3b125e9d246e07a2b43b61740759a0dace: |
| // |
| // When the formal parameter list of a non-redirecting generative |
| // constructor contains any initializing formals, a new scope is |
| // introduced, the _formal parameter initializer scope_, which is the |
| // current scope of the initializer list of the constructor, and which is |
| // enclosed in the scope where the constructor is declared. Each |
| // initializing formal in the formal parameter list introduces a final |
| // local variable into the formal parameter initializer scope, but not into |
| // the formal parameter scope; every other formal parameter introduces a |
| // local variable into both the formal parameter scope and the formal |
| // parameter initializer scope. |
| |
| if (formals == null) return parent; |
| Map<String, Builder> local = <String, Builder>{}; |
| for (FormalParameterBuilder formal in formals) { |
| local[formal.name] = formal.forFormalParameterInitializerScope(); |
| } |
| return new Scope(local, null, parent, "formal parameter initializer", |
| isModifiable: false); |
| } |
| |
| /// This scope doesn't correspond to any scope specified in the Dart |
| /// Programming Language Specification, 4th ed. It's an unspecified extension |
| /// to support generic methods. |
| Scope computeTypeParameterScope(Scope parent) { |
| if (typeVariables == null) return parent; |
| Map<String, Builder> local = <String, Builder>{}; |
| for (TypeVariableBuilder variable in typeVariables) { |
| local[variable.name] = variable; |
| } |
| return new Scope(local, null, parent, "type parameter", |
| isModifiable: false); |
| } |
| |
| FormalParameterBuilder getFormal(String name) { |
| if (formals != null) { |
| for (FormalParameterBuilder formal in formals) { |
| if (formal.name == name) return formal; |
| } |
| } |
| return null; |
| } |
| |
| final String nativeMethodName; |
| |
| FunctionNode function; |
| |
| Statement actualBody; |
| |
| FunctionBuilder get actualOrigin; |
| |
| void set body(Statement newBody) { |
| // if (newBody != null) { |
| // if (isAbstract) { |
| // // TODO(danrubel): Is this check needed? |
| // return internalProblem(messageInternalProblemBodyOnAbstractMethod, |
| // newBody.fileOffset, fileUri); |
| // } |
| // } |
| actualBody = newBody; |
| if (function != null) { |
| // A forwarding semi-stub is a method that is abstract in the source code, |
| // but which needs to have a forwarding stub body in order to ensure that |
| // covariance checks occur. We don't want to replace the forwarding stub |
| // body with null. |
| var parent = function.parent; |
| if (!(newBody == null && |
| parent is Procedure && |
| parent.isForwardingSemiStub)) { |
| function.body = newBody; |
| newBody?.parent = function; |
| } |
| } |
| } |
| |
| void setRedirectingFactoryBody(Member target, List<DartType> typeArguments) { |
| if (actualBody != null) { |
| unexpected("null", "${actualBody.runtimeType}", charOffset, fileUri); |
| } |
| actualBody = new RedirectingFactoryBody(target, typeArguments); |
| function.body = actualBody; |
| actualBody?.parent = function; |
| if (isPatch) { |
| actualOrigin.setRedirectingFactoryBody(target, typeArguments); |
| } |
| } |
| |
| Statement get body => actualBody ??= new EmptyStatement(); |
| |
| bool get isNative => nativeMethodName != null; |
| |
| FunctionNode buildFunction(LibraryBuilder library) { |
| assert(function == null); |
| FunctionNode result = new FunctionNode(body, asyncMarker: asyncModifier); |
| IncludesTypeParametersNonCovariantly needsCheckVisitor; |
| if (!isConstructor && !isFactory && parent is ClassBuilder) { |
| Class enclosingClass = parent.target; |
| if (enclosingClass.typeParameters.isNotEmpty) { |
| needsCheckVisitor = new IncludesTypeParametersNonCovariantly( |
| enclosingClass.typeParameters, |
| // We are checking the parameter types which are in a contravariant position. |
| initialVariance: Variance.contravariant); |
| } |
| } |
| if (typeVariables != null) { |
| for (TypeVariableBuilder t in typeVariables) { |
| TypeParameter parameter = t.parameter; |
| result.typeParameters.add(parameter); |
| if (needsCheckVisitor != null) { |
| if (parameter.bound.accept(needsCheckVisitor)) { |
| parameter.isGenericCovariantImpl = true; |
| } |
| } |
| } |
| setParents(result.typeParameters, result); |
| } |
| if (formals != null) { |
| for (FormalParameterBuilder formal in formals) { |
| VariableDeclaration parameter = formal.build(library, 0); |
| if (needsCheckVisitor != null) { |
| if (parameter.type.accept(needsCheckVisitor)) { |
| parameter.isGenericCovariantImpl = true; |
| } |
| } |
| if (formal.isNamed) { |
| result.namedParameters.add(parameter); |
| } else { |
| result.positionalParameters.add(parameter); |
| } |
| parameter.parent = result; |
| if (formal.isRequired) { |
| result.requiredParameterCount++; |
| } |
| } |
| } |
| if (isSetter && (formals?.length != 1 || formals[0].isOptional)) { |
| // Replace illegal parameters by single dummy parameter. |
| // Do this after building the parameters, since the diet listener |
| // assumes that parameters are built, even if illegal in number. |
| VariableDeclaration parameter = |
| new VariableDeclarationJudgment("#synthetic", 0); |
| result.positionalParameters.clear(); |
| result.positionalParameters.add(parameter); |
| parameter.parent = result; |
| result.namedParameters.clear(); |
| result.requiredParameterCount = 1; |
| } |
| if (returnType != null) { |
| result.returnType = returnType.build(library); |
| } |
| if (!isConstructor && !isInstanceMember && parent is ClassBuilder) { |
| List<TypeParameter> typeParameters = parent.target.typeParameters; |
| if (typeParameters.isNotEmpty) { |
| Map<TypeParameter, DartType> substitution; |
| DartType removeTypeVariables(DartType type) { |
| if (substitution == null) { |
| substitution = <TypeParameter, DartType>{}; |
| for (TypeParameter parameter in typeParameters) { |
| substitution[parameter] = const DynamicType(); |
| } |
| } |
| library.addProblem( |
| messageNonInstanceTypeVariableUse, charOffset, noLength, fileUri); |
| return substitute(type, substitution); |
| } |
| |
| Set<TypeParameter> set = typeParameters.toSet(); |
| for (VariableDeclaration parameter in result.positionalParameters) { |
| if (containsTypeVariable(parameter.type, set)) { |
| parameter.type = removeTypeVariables(parameter.type); |
| } |
| } |
| for (VariableDeclaration parameter in result.namedParameters) { |
| if (containsTypeVariable(parameter.type, set)) { |
| parameter.type = removeTypeVariables(parameter.type); |
| } |
| } |
| if (containsTypeVariable(result.returnType, set)) { |
| result.returnType = removeTypeVariables(result.returnType); |
| } |
| } |
| } |
| if (parent is ClassBuilder) { |
| ClassBuilder cls = parent; |
| if (cls.isExtension && isInstanceMember) { |
| extensionThis = result.positionalParameters.first; |
| } |
| } |
| return function = result; |
| } |
| |
| Member build(SourceLibraryBuilder library); |
| |
| @override |
| void buildOutlineExpressions(LibraryBuilder library) { |
| MetadataBuilder.buildAnnotations( |
| target, metadata, library, isClassMember ? parent : null, this); |
| |
| if (formals != null) { |
| // For const constructors we need to include default parameter values |
| // into the outline. For all other formals we need to call |
| // buildOutlineExpressions to clear initializerToken to prevent |
| // consuming too much memory. |
| for (FormalParameterBuilder formal in formals) { |
| formal.buildOutlineExpressions(library); |
| } |
| } |
| } |
| |
| void becomeNative(Loader loader) { |
| Builder constructor = loader.getNativeAnnotation(); |
| Arguments arguments = |
| new Arguments(<Expression>[new StringLiteral(nativeMethodName)]); |
| Expression annotation; |
| if (constructor.isConstructor) { |
| annotation = new ConstructorInvocation(constructor.target, arguments) |
| ..isConst = true; |
| } else { |
| annotation = new StaticInvocation(constructor.target, arguments) |
| ..isConst = true; |
| } |
| target.addAnnotation(annotation); |
| } |
| |
| bool checkPatch(FunctionBuilder patch) { |
| if (!isExternal) { |
| patch.library.addProblem( |
| messagePatchNonExternal, patch.charOffset, noLength, patch.fileUri, |
| context: [ |
| messagePatchDeclarationOrigin.withLocation( |
| fileUri, charOffset, noLength) |
| ]); |
| return false; |
| } |
| return true; |
| } |
| |
| void reportPatchMismatch(Builder patch) { |
| library.addProblem(messagePatchDeclarationMismatch, patch.charOffset, |
| noLength, patch.fileUri, context: [ |
| messagePatchDeclarationOrigin.withLocation(fileUri, charOffset, noLength) |
| ]); |
| } |
| } |
| |
| class ProcedureBuilder extends FunctionBuilder { |
| final Procedure procedure; |
| final int charOpenParenOffset; |
| |
| AsyncMarker actualAsyncModifier = AsyncMarker.Sync; |
| |
| @override |
| ProcedureBuilder actualOrigin; |
| |
| bool hadTypesInferred = false; |
| |
| ProcedureBuilder( |
| List<MetadataBuilder> metadata, |
| int modifiers, |
| TypeBuilder returnType, |
| String name, |
| List<TypeVariableBuilder> typeVariables, |
| List<FormalParameterBuilder> formals, |
| ProcedureKind kind, |
| SourceLibraryBuilder compilationUnit, |
| int startCharOffset, |
| int charOffset, |
| this.charOpenParenOffset, |
| int charEndOffset, |
| [String nativeMethodName]) |
| : procedure = |
| new Procedure(null, kind, null, fileUri: compilationUnit?.fileUri) |
| ..startFileOffset = startCharOffset |
| ..fileOffset = charOffset |
| ..fileEndOffset = charEndOffset, |
| super(metadata, modifiers, returnType, name, typeVariables, formals, |
| compilationUnit, charOffset, nativeMethodName); |
| |
| @override |
| ProcedureBuilder get origin => actualOrigin ?? this; |
| |
| ProcedureKind get kind => procedure.kind; |
| |
| AsyncMarker get asyncModifier => actualAsyncModifier; |
| |
| Statement get body { |
| if (actualBody == null && !isAbstract && !isExternal) { |
| actualBody = new EmptyStatement(); |
| } |
| return actualBody; |
| } |
| |
| void set asyncModifier(AsyncMarker newModifier) { |
| actualAsyncModifier = newModifier; |
| if (function != null) { |
| // No parent, it's an enum. |
| function.asyncMarker = actualAsyncModifier; |
| function.dartAsyncMarker = actualAsyncModifier; |
| } |
| } |
| |
| bool get isEligibleForTopLevelInference { |
| if (library.legacyMode) return false; |
| if (isInstanceMember) { |
| if (returnType == null) return true; |
| if (formals != null) { |
| for (var formal in formals) { |
| if (formal.type == null) return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| /// Returns `true` if this procedure is declared in an extension declaration. |
| bool get isExtensionMethod { |
| if (parent is ClassBuilder) { |
| ClassBuilder cls = parent; |
| return cls.isExtension; |
| } |
| return false; |
| } |
| |
| Procedure build(SourceLibraryBuilder library) { |
| // TODO(ahe): I think we may call this twice on parts. Investigate. |
| if (procedure.name == null) { |
| procedure.function = buildFunction(library); |
| procedure.function.parent = procedure; |
| procedure.function.fileOffset = charOpenParenOffset; |
| procedure.function.fileEndOffset = procedure.fileEndOffset; |
| procedure.isAbstract = isAbstract; |
| procedure.isExternal = isExternal; |
| procedure.isConst = isConst; |
| if (isExtensionMethod) { |
| ClassBuilder extension = parent; |
| procedure.isStatic = false; |
| procedure.isExtensionMethod = true; |
| procedure.kind = ProcedureKind.Method; |
| procedure.name = new Name('${extension.name}|${name}', library.target); |
| } else { |
| procedure.isStatic = isStatic; |
| procedure.name = new Name(name, library.target); |
| } |
| } |
| return procedure; |
| } |
| |
| Procedure get target => origin.procedure; |
| |
| @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 |
| origin.procedure.fileUri = fileUri; |
| origin.procedure.startFileOffset = procedure.startFileOffset; |
| origin.procedure.fileOffset = procedure.fileOffset; |
| origin.procedure.fileEndOffset = procedure.fileEndOffset; |
| origin.procedure.annotations |
| .forEach((m) => m.fileOffset = procedure.fileOffset); |
| |
| origin.procedure.isAbstract = procedure.isAbstract; |
| origin.procedure.isExternal = procedure.isExternal; |
| origin.procedure.function = procedure.function; |
| origin.procedure.function.parent = origin.procedure; |
| return 1; |
| } |
| |
| @override |
| void becomeNative(Loader loader) { |
| procedure.isExternal = true; |
| super.becomeNative(loader); |
| } |
| |
| @override |
| void applyPatch(Builder patch) { |
| if (patch is ProcedureBuilder) { |
| if (checkPatch(patch)) { |
| patch.actualOrigin = this; |
| } |
| } else { |
| reportPatchMismatch(patch); |
| } |
| } |
| } |
| |
| // TODO(ahe): Move this to own file? |
| class ConstructorBuilder extends FunctionBuilder { |
| final Constructor constructor; |
| |
| final int charOpenParenOffset; |
| |
| bool hasMovedSuperInitializer = false; |
| |
| SuperInitializer superInitializer; |
| |
| RedirectingInitializer redirectingInitializer; |
| |
| Token beginInitializers; |
| |
| @override |
| ConstructorBuilder actualOrigin; |
| |
| ConstructorBuilder( |
| List<MetadataBuilder> metadata, |
| int modifiers, |
| TypeBuilder returnType, |
| String name, |
| List<TypeVariableBuilder> typeVariables, |
| List<FormalParameterBuilder> formals, |
| SourceLibraryBuilder compilationUnit, |
| int startCharOffset, |
| int charOffset, |
| this.charOpenParenOffset, |
| int charEndOffset, |
| [String nativeMethodName]) |
| : constructor = new Constructor(null, fileUri: compilationUnit?.fileUri) |
| ..startFileOffset = startCharOffset |
| ..fileOffset = charOffset |
| ..fileEndOffset = charEndOffset, |
| super(metadata, modifiers, returnType, name, typeVariables, formals, |
| compilationUnit, charOffset, nativeMethodName); |
| |
| @override |
| ConstructorBuilder get origin => actualOrigin ?? this; |
| |
| bool get isInstanceMember => false; |
| |
| bool get isConstructor => true; |
| |
| AsyncMarker get asyncModifier => AsyncMarker.Sync; |
| |
| ProcedureKind get kind => null; |
| |
| bool get isRedirectingGenerativeConstructor { |
| return isRedirectingGenerativeConstructorImplementation(constructor); |
| } |
| |
| bool get isEligibleForTopLevelInference { |
| if (library.legacyMode) return false; |
| if (formals != null) { |
| for (var formal in formals) { |
| if (formal.type == null && formal.isInitializingFormal) return true; |
| } |
| } |
| return false; |
| } |
| |
| Constructor build(SourceLibraryBuilder library) { |
| if (constructor.name == null) { |
| constructor.function = buildFunction(library); |
| constructor.function.parent = constructor; |
| constructor.function.fileOffset = charOpenParenOffset; |
| constructor.function.fileEndOffset = constructor.fileEndOffset; |
| constructor.function.typeParameters = const <TypeParameter>[]; |
| constructor.isConst = isConst; |
| constructor.isExternal = isExternal; |
| constructor.name = new Name(name, library.target); |
| } |
| if (isEligibleForTopLevelInference) { |
| for (FormalParameterBuilder formal in formals) { |
| if (formal.type == null && formal.isInitializingFormal) { |
| formal.declaration.type = null; |
| } |
| } |
| library.loader.typeInferenceEngine.toBeInferred[constructor] = library; |
| } |
| return constructor; |
| } |
| |
| @override |
| void buildOutlineExpressions(LibraryBuilder library) { |
| super.buildOutlineExpressions(library); |
| |
| // For modular compilation purposes we need to include initializers |
| // for const constructors into the outline. |
| if (isConst && beginInitializers != null) { |
| ClassBuilder classBuilder = parent; |
| BodyBuilder bodyBuilder = new BodyBuilder.forOutlineExpression( |
| library, classBuilder, this, classBuilder.scope, fileUri); |
| bodyBuilder.constantContext = ConstantContext.inferred; |
| bodyBuilder.parseInitializers(beginInitializers); |
| bodyBuilder.resolveRedirectingFactoryTargets(); |
| } |
| beginInitializers = null; |
| } |
| |
| FunctionNode buildFunction(LibraryBuilder library) { |
| // According to the specification §9.3 the return type of a constructor |
| // function is its enclosing class. |
| FunctionNode functionNode = super.buildFunction(library); |
| ClassBuilder enclosingClass = parent; |
| List<DartType> typeParameterTypes = new List<DartType>(); |
| for (int i = 0; i < enclosingClass.target.typeParameters.length; i++) { |
| TypeParameter typeParameter = enclosingClass.target.typeParameters[i]; |
| typeParameterTypes.add(new TypeParameterType(typeParameter)); |
| } |
| functionNode.returnType = |
| new InterfaceType(enclosingClass.target, typeParameterTypes); |
| return functionNode; |
| } |
| |
| Constructor get target => origin.constructor; |
| |
| void injectInvalidInitializer( |
| Message message, int charOffset, ExpressionGeneratorHelper helper) { |
| List<Initializer> initializers = constructor.initializers; |
| Initializer lastInitializer = initializers.removeLast(); |
| assert(lastInitializer == superInitializer || |
| lastInitializer == redirectingInitializer); |
| Initializer error = helper.buildInvalidInitializer( |
| helper.desugarSyntheticExpression( |
| helper.buildProblem(message, charOffset, noLength)), |
| charOffset); |
| initializers.add(error..parent = constructor); |
| initializers.add(lastInitializer); |
| } |
| |
| void addInitializer( |
| Initializer initializer, ExpressionGeneratorHelper helper) { |
| List<Initializer> initializers = constructor.initializers; |
| if (initializer is SuperInitializer) { |
| if (superInitializer != null || redirectingInitializer != null) { |
| injectInvalidInitializer(messageMoreThanOneSuperOrThisInitializer, |
| initializer.fileOffset, helper); |
| } else { |
| initializers.add(initializer..parent = constructor); |
| superInitializer = initializer; |
| } |
| } else if (initializer is RedirectingInitializer) { |
| if (superInitializer != null || redirectingInitializer != null) { |
| injectInvalidInitializer(messageMoreThanOneSuperOrThisInitializer, |
| initializer.fileOffset, helper); |
| } else if (constructor.initializers.isNotEmpty) { |
| Initializer first = constructor.initializers.first; |
| Initializer error = helper.buildInvalidInitializer( |
| helper.desugarSyntheticExpression(helper.buildProblem( |
| messageThisInitializerNotAlone, first.fileOffset, noLength)), |
| first.fileOffset); |
| initializers.add(error..parent = constructor); |
| } else { |
| initializers.add(initializer..parent = constructor); |
| redirectingInitializer = initializer; |
| } |
| } else if (redirectingInitializer != null) { |
| injectInvalidInitializer( |
| messageThisInitializerNotAlone, initializer.fileOffset, helper); |
| } else if (superInitializer != null) { |
| injectInvalidInitializer( |
| messageSuperInitializerNotLast, superInitializer.fileOffset, helper); |
| } else { |
| initializers.add(initializer..parent = constructor); |
| } |
| } |
| |
| @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 |
| origin.constructor.fileUri = fileUri; |
| origin.constructor.startFileOffset = constructor.startFileOffset; |
| origin.constructor.fileOffset = constructor.fileOffset; |
| origin.constructor.fileEndOffset = constructor.fileEndOffset; |
| origin.constructor.annotations |
| .forEach((m) => m.fileOffset = constructor.fileOffset); |
| |
| origin.constructor.isExternal = constructor.isExternal; |
| origin.constructor.function = constructor.function; |
| origin.constructor.function.parent = origin.constructor; |
| origin.constructor.initializers = constructor.initializers; |
| setParents(origin.constructor.initializers, origin.constructor); |
| return 1; |
| } |
| |
| @override |
| void becomeNative(Loader loader) { |
| constructor.isExternal = true; |
| super.becomeNative(loader); |
| } |
| |
| @override |
| void applyPatch(Builder patch) { |
| if (patch is ConstructorBuilder) { |
| if (checkPatch(patch)) { |
| patch.actualOrigin = this; |
| } |
| } else { |
| reportPatchMismatch(patch); |
| } |
| } |
| |
| void prepareInitializers() { |
| // For const constructors we parse initializers already at the outlining |
| // stage, there is no easy way to make body building stage skip initializer |
| // parsing, so we simply clear parsed initializers and rebuild them |
| // again. |
| // Note: this method clears both initializers from the target Kernel node |
| // and internal state associated with parsing initializers. |
| if (target.isConst) { |
| target.initializers.length = 0; |
| redirectingInitializer = null; |
| superInitializer = null; |
| hasMovedSuperInitializer = false; |
| } |
| } |
| } |
| |
| class RedirectingFactoryBuilder extends ProcedureBuilder { |
| final ConstructorReferenceBuilder redirectionTarget; |
| List<DartType> typeArguments; |
| |
| RedirectingFactoryBuilder( |
| List<MetadataBuilder> metadata, |
| int modifiers, |
| TypeBuilder returnType, |
| String name, |
| List<TypeVariableBuilder> typeVariables, |
| List<FormalParameterBuilder> formals, |
| SourceLibraryBuilder compilationUnit, |
| int startCharOffset, |
| int charOffset, |
| int charOpenParenOffset, |
| int charEndOffset, |
| [String nativeMethodName, |
| this.redirectionTarget]) |
| : super( |
| metadata, |
| modifiers, |
| returnType, |
| name, |
| typeVariables, |
| formals, |
| ProcedureKind.Factory, |
| compilationUnit, |
| startCharOffset, |
| charOffset, |
| charOpenParenOffset, |
| charEndOffset, |
| nativeMethodName); |
| |
| @override |
| Statement get body => actualBody; |
| |
| @override |
| void setRedirectingFactoryBody(Member target, List<DartType> typeArguments) { |
| if (actualBody != null) { |
| unexpected("null", "${actualBody.runtimeType}", charOffset, fileUri); |
| } |
| |
| // Ensure that constant factories only have constant targets/bodies. |
| if (isConst && !target.isConst) { |
| library.addProblem(messageConstFactoryRedirectionToNonConst, charOffset, |
| noLength, fileUri); |
| } |
| |
| actualBody = new RedirectingFactoryBody(target, typeArguments); |
| function.body = actualBody; |
| actualBody?.parent = function; |
| if (isPatch) { |
| if (function.typeParameters != null) { |
| Map<TypeParameter, DartType> substitution = <TypeParameter, DartType>{}; |
| for (int i = 0; i < function.typeParameters.length; i++) { |
| substitution[function.typeParameters[i]] = |
| new TypeParameterType(actualOrigin.function.typeParameters[i]); |
| } |
| List<DartType> newTypeArguments = |
| new List<DartType>(typeArguments.length); |
| for (int i = 0; i < newTypeArguments.length; i++) { |
| newTypeArguments[i] = substitute(typeArguments[i], substitution); |
| } |
| typeArguments = newTypeArguments; |
| } |
| actualOrigin.setRedirectingFactoryBody(target, typeArguments); |
| } |
| } |
| |
| @override |
| Procedure build(SourceLibraryBuilder library) { |
| Procedure result = super.build(library); |
| result.isRedirectingFactoryConstructor = true; |
| if (redirectionTarget.typeArguments != null) { |
| typeArguments = |
| new List<DartType>(redirectionTarget.typeArguments.length); |
| for (int i = 0; i < typeArguments.length; i++) { |
| typeArguments[i] = redirectionTarget.typeArguments[i].build(library); |
| } |
| } |
| return result; |
| } |
| |
| @override |
| int finishPatch() { |
| if (!isPatch) return 0; |
| |
| super.finishPatch(); |
| |
| if (origin is RedirectingFactoryBuilder) { |
| RedirectingFactoryBuilder redirectingOrigin = origin; |
| redirectingOrigin.typeArguments = typeArguments; |
| } |
| |
| return 1; |
| } |
| } |
