| // 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_library_builder; |
| |
| import 'package:front_end/src/fasta/scanner/token.dart' show Token; |
| |
| import 'package:kernel/ast.dart'; |
| |
| import 'package:kernel/clone.dart' show CloneVisitor; |
| |
| import '../errors.dart' show internalError; |
| |
| import '../loader.dart' show Loader; |
| |
| import '../modifier.dart' show abstractMask, staticMask; |
| |
| import '../source/source_library_builder.dart' |
| show DeclarationBuilder, SourceLibraryBuilder; |
| |
| import '../source/source_class_builder.dart' show SourceClassBuilder; |
| |
| import '../util/relativize.dart' show relativizeUri; |
| |
| import 'kernel_builder.dart' |
| show |
| AccessErrorBuilder, |
| Builder, |
| BuiltinTypeBuilder, |
| ClassBuilder, |
| ConstructorReferenceBuilder, |
| FormalParameterBuilder, |
| FunctionTypeAliasBuilder, |
| InvalidTypeBuilder, |
| KernelConstructorBuilder, |
| KernelEnumBuilder, |
| KernelFieldBuilder, |
| KernelFormalParameterBuilder, |
| KernelFunctionTypeAliasBuilder, |
| KernelFunctionTypeBuilder, |
| KernelInvalidTypeBuilder, |
| KernelMixinApplicationBuilder, |
| KernelNamedMixinApplicationBuilder, |
| KernelNamedTypeBuilder, |
| KernelProcedureBuilder, |
| KernelTypeBuilder, |
| KernelTypeVariableBuilder, |
| LibraryBuilder, |
| MemberBuilder, |
| MetadataBuilder, |
| NamedMixinApplicationBuilder, |
| PrefixBuilder, |
| ProcedureBuilder, |
| Scope, |
| TypeBuilder, |
| TypeVariableBuilder, |
| compareProcedures; |
| |
| class KernelLibraryBuilder |
| extends SourceLibraryBuilder<KernelTypeBuilder, Library> { |
| final Library library; |
| |
| final Map<String, SourceClassBuilder> mixinApplicationClasses = |
| <String, SourceClassBuilder>{}; |
| |
| final List<List> argumentsWithMissingDefaultValues = <List>[]; |
| |
| final List<KernelProcedureBuilder> nativeMethods = <KernelProcedureBuilder>[]; |
| |
| final List<KernelTypeVariableBuilder> boundlessTypeVariables = |
| <KernelTypeVariableBuilder>[]; |
| |
| KernelLibraryBuilder(Uri uri, Uri fileUri, Loader loader) |
| : library = new Library(uri, fileUri: relativizeUri(fileUri)), |
| super(loader, fileUri); |
| |
| Library get target => library; |
| |
| Uri get uri => library.importUri; |
| |
| KernelTypeBuilder addNamedType( |
| String name, List<KernelTypeBuilder> arguments, int charOffset) { |
| return addType( |
| new KernelNamedTypeBuilder(name, arguments, charOffset, fileUri)); |
| } |
| |
| KernelTypeBuilder addMixinApplication(KernelTypeBuilder supertype, |
| List<KernelTypeBuilder> mixins, int charOffset) { |
| KernelTypeBuilder type = new KernelMixinApplicationBuilder( |
| supertype, mixins, this, charOffset, fileUri); |
| return addType(type); |
| } |
| |
| KernelTypeBuilder addVoidType(int charOffset) { |
| return addNamedType("void", null, charOffset); |
| } |
| |
| void addClass( |
| List<MetadataBuilder> metadata, |
| int modifiers, |
| String className, |
| List<TypeVariableBuilder> typeVariables, |
| KernelTypeBuilder supertype, |
| List<KernelTypeBuilder> interfaces, |
| int charOffset) { |
| assert(currentDeclaration.parent == libraryDeclaration); |
| Map<String, MemberBuilder> members = currentDeclaration.members; |
| Map<String, MemberBuilder> constructors = currentDeclaration.constructors; |
| Map<String, MemberBuilder> setters = currentDeclaration.setters; |
| |
| Scope classScope = new Scope( |
| members, setters, scope.withTypeVariables(typeVariables), |
| isModifiable: false); |
| |
| // When looking up a constructor, we don't consider type variables or the |
| // library scope. |
| Scope constructorScope = |
| new Scope(constructors, null, null, isModifiable: false); |
| ClassBuilder cls = new SourceClassBuilder( |
| metadata, |
| modifiers, |
| className, |
| typeVariables, |
| supertype, |
| interfaces, |
| classScope, |
| constructorScope, |
| this, |
| new List<ConstructorReferenceBuilder>.from(constructorReferences), |
| charOffset); |
| constructorReferences.clear(); |
| void setParent(String name, MemberBuilder member) { |
| while (member != null) { |
| member.parent = cls; |
| member = member.next; |
| } |
| } |
| |
| members.forEach(setParent); |
| constructors.forEach(setParent); |
| setters.forEach(setParent); |
| // Nested declaration began in `OutlineBuilder.beginClassDeclaration`. |
| endNestedDeclaration().resolveTypes(typeVariables, this); |
| addBuilder(className, cls, charOffset); |
| } |
| |
| void addNamedMixinApplication( |
| List<MetadataBuilder> metadata, |
| String name, |
| List<TypeVariableBuilder> typeVariables, |
| int modifiers, |
| KernelTypeBuilder mixinApplication, |
| List<KernelTypeBuilder> interfaces, |
| int charOffset) { |
| NamedMixinApplicationBuilder builder = |
| new KernelNamedMixinApplicationBuilder(metadata, name, typeVariables, |
| modifiers, mixinApplication, interfaces, this, charOffset); |
| // Nested declaration began in `OutlineBuilder.beginNamedMixinApplication`. |
| endNestedDeclaration().resolveTypes(typeVariables, this); |
| addBuilder(name, builder, charOffset); |
| } |
| |
| void addField(List<MetadataBuilder> metadata, int modifiers, |
| KernelTypeBuilder type, String name, int charOffset, Token initializer) { |
| addBuilder( |
| name, |
| new KernelFieldBuilder(loader.astFactory, loader.topLevelTypeInferrer, |
| metadata, type, name, modifiers, this, charOffset, initializer), |
| charOffset); |
| } |
| |
| String computeAndValidateConstructorName(String name, int charOffset) { |
| String className = currentDeclaration.name; |
| bool startsWithClassName = name.startsWith(className); |
| if (startsWithClassName && name.length == className.length) { |
| // Unnamed constructor or factory. |
| return ""; |
| } |
| int index = name.indexOf("."); |
| if (startsWithClassName && index == className.length) { |
| // Named constructor or factory. |
| return name.substring(index + 1); |
| } |
| if (index == -1) { |
| // A legal name for a regular method, but not for a constructor. |
| return null; |
| } |
| String suffix = name.substring(index + 1); |
| addCompileTimeError( |
| charOffset, |
| "'$name' isn't a legal method name.\n" |
| "Did you mean '$className.$suffix'?"); |
| return suffix; |
| } |
| |
| void addProcedure( |
| List<MetadataBuilder> metadata, |
| int modifiers, |
| KernelTypeBuilder returnType, |
| String name, |
| List<TypeVariableBuilder> typeVariables, |
| List<FormalParameterBuilder> formals, |
| AsyncMarker asyncModifier, |
| ProcedureKind kind, |
| int charOffset, |
| int charOpenParenOffset, |
| int charEndOffset, |
| String nativeMethodName, |
| {bool isTopLevel}) { |
| // Nested declaration began in `OutlineBuilder.beginMethod` or |
| // `OutlineBuilder.beginTopLevelMethod`. |
| endNestedDeclaration().resolveTypes(typeVariables, this); |
| ProcedureBuilder procedure; |
| String constructorName = |
| isTopLevel ? null : computeAndValidateConstructorName(name, charOffset); |
| if (constructorName != null) { |
| name = constructorName; |
| procedure = new KernelConstructorBuilder( |
| metadata, |
| modifiers & ~abstractMask, |
| returnType, |
| name, |
| typeVariables, |
| formals, |
| this, |
| charOffset, |
| charOpenParenOffset, |
| charEndOffset, |
| nativeMethodName); |
| } else { |
| procedure = new KernelProcedureBuilder( |
| metadata, |
| modifiers, |
| returnType, |
| name, |
| typeVariables, |
| formals, |
| asyncModifier, |
| kind, |
| this, |
| charOffset, |
| charOpenParenOffset, |
| charEndOffset, |
| nativeMethodName); |
| } |
| addBuilder(name, procedure, charOffset); |
| if (nativeMethodName != null) { |
| addNativeMethod(procedure); |
| } |
| } |
| |
| void addFactoryMethod( |
| List<MetadataBuilder> metadata, |
| int modifiers, |
| ConstructorReferenceBuilder constructorNameReference, |
| List<FormalParameterBuilder> formals, |
| AsyncMarker asyncModifier, |
| ConstructorReferenceBuilder redirectionTarget, |
| int charOffset, |
| int charOpenParenOffset, |
| int charEndOffset, |
| String nativeMethodName) { |
| // Nested declaration began in `OutlineBuilder.beginFactoryMethod`. |
| DeclarationBuilder<KernelTypeBuilder> factoryDeclaration = |
| endNestedDeclaration(); |
| String name = constructorNameReference.name; |
| String constructorName = |
| computeAndValidateConstructorName(name, charOffset); |
| if (constructorName != null) { |
| name = constructorName; |
| } |
| assert(constructorNameReference.suffix == null); |
| KernelProcedureBuilder procedure = new KernelProcedureBuilder( |
| metadata, |
| staticMask | modifiers, |
| null, |
| name, |
| <TypeVariableBuilder>[], |
| formals, |
| asyncModifier, |
| ProcedureKind.Factory, |
| this, |
| charOffset, |
| charOpenParenOffset, |
| charEndOffset, |
| nativeMethodName, |
| redirectionTarget); |
| currentDeclaration.addFactoryDeclaration(procedure, factoryDeclaration); |
| addBuilder(name, procedure, charOffset); |
| if (nativeMethodName != null) { |
| addNativeMethod(procedure); |
| } |
| } |
| |
| void addEnum(List<MetadataBuilder> metadata, String name, |
| List<Object> constantNamesAndOffsets, int charOffset, int charEndOffset) { |
| addBuilder( |
| name, |
| new KernelEnumBuilder(loader.astFactory, metadata, name, |
| constantNamesAndOffsets, this, charOffset, charEndOffset), |
| charOffset); |
| } |
| |
| void addFunctionTypeAlias( |
| List<MetadataBuilder> metadata, |
| KernelTypeBuilder returnType, |
| String name, |
| List<TypeVariableBuilder> typeVariables, |
| List<FormalParameterBuilder> formals, |
| int charOffset) { |
| FunctionTypeAliasBuilder typedef = new KernelFunctionTypeAliasBuilder( |
| metadata, returnType, name, typeVariables, formals, this, charOffset); |
| // Nested declaration began in `OutlineBuilder.beginFunctionTypeAlias`. |
| endNestedDeclaration().resolveTypes(typeVariables, this); |
| addBuilder(name, typedef, charOffset); |
| } |
| |
| KernelFunctionTypeBuilder addFunctionType( |
| KernelTypeBuilder returnType, |
| List<TypeVariableBuilder> typeVariables, |
| List<FormalParameterBuilder> formals, |
| int charOffset) { |
| return new KernelFunctionTypeBuilder( |
| charOffset, fileUri, returnType, typeVariables, formals); |
| } |
| |
| KernelFormalParameterBuilder addFormalParameter( |
| List<MetadataBuilder> metadata, |
| int modifiers, |
| KernelTypeBuilder type, |
| String name, |
| bool hasThis, |
| int charOffset) { |
| return new KernelFormalParameterBuilder( |
| metadata, modifiers, type, name, hasThis, this, charOffset); |
| } |
| |
| KernelTypeVariableBuilder addTypeVariable( |
| String name, KernelTypeBuilder bound, int charOffset) { |
| var builder = new KernelTypeVariableBuilder(name, this, charOffset, bound); |
| boundlessTypeVariables.add(builder); |
| return builder; |
| } |
| |
| @override |
| void buildBuilder(Builder builder, LibraryBuilder coreLibrary) { |
| if (builder is SourceClassBuilder) { |
| Class cls = builder.build(this, coreLibrary); |
| library.addClass(cls); |
| } else if (builder is KernelFieldBuilder) { |
| library.addMember(builder.build(this)..isStatic = true); |
| } else if (builder is KernelProcedureBuilder) { |
| library.addMember(builder.build(this)..isStatic = true); |
| } else if (builder is FunctionTypeAliasBuilder) { |
| // Kernel discard typedefs and use their corresponding function types |
| // directly. |
| } else if (builder is KernelEnumBuilder) { |
| library.addClass(builder.build(this, coreLibrary)); |
| } else if (builder is PrefixBuilder) { |
| // Ignored. Kernel doesn't represent prefixes. |
| } else if (builder is BuiltinTypeBuilder) { |
| // Nothing needed. |
| } else { |
| internalError("Unhandled builder: ${builder.runtimeType}"); |
| } |
| } |
| |
| @override |
| Library build(LibraryBuilder coreLibrary) { |
| super.build(coreLibrary); |
| library.name = name; |
| library.procedures.sort(compareProcedures); |
| return library; |
| } |
| |
| @override |
| Builder buildAmbiguousBuilder( |
| String name, Builder builder, Builder other, int charOffset, |
| {bool isExport: false, bool isImport: false}) { |
| // TODO(ahe): Can I move this to Scope or Prefix? |
| if (builder == other) return builder; |
| if (builder is InvalidTypeBuilder) return builder; |
| if (other is InvalidTypeBuilder) return other; |
| if (builder is AccessErrorBuilder) { |
| AccessErrorBuilder error = builder; |
| builder = error.builder; |
| } |
| if (other is AccessErrorBuilder) { |
| AccessErrorBuilder error = other; |
| other = error.builder; |
| } |
| bool isLocal = false; |
| Builder preferred; |
| Uri uri; |
| Uri otherUri; |
| Uri preferredUri; |
| Uri hiddenUri; |
| if (scope.local[name] == builder) { |
| isLocal = true; |
| preferred = builder; |
| hiddenUri = other.computeLibraryUri(); |
| } else { |
| uri = builder.computeLibraryUri(); |
| otherUri = other.computeLibraryUri(); |
| if (otherUri?.scheme == "dart" && uri?.scheme != "dart") { |
| preferred = builder; |
| preferredUri = uri; |
| hiddenUri = otherUri; |
| } else if (uri?.scheme == "dart" && otherUri?.scheme != "dart") { |
| preferred = other; |
| preferredUri = otherUri; |
| hiddenUri = uri; |
| } |
| } |
| if (preferred != null) { |
| if (isLocal) { |
| if (isExport) { |
| addNit(charOffset, |
| "Local definition of '$name' hides export from '${hiddenUri}'."); |
| } else { |
| addNit(charOffset, |
| "Local definition of '$name' hides import from '${hiddenUri}'."); |
| } |
| } else { |
| if (isExport) { |
| addNit( |
| charOffset, |
| "Export of '$name' (from '${preferredUri}') hides export from " |
| "'${hiddenUri}'."); |
| } else { |
| addNit( |
| charOffset, |
| "Import of '$name' (from '${preferredUri}') hides import from " |
| "'${hiddenUri}'."); |
| } |
| } |
| return preferred; |
| } |
| if (builder.next == null && other.next == null) { |
| if (isImport && builder is PrefixBuilder && other is PrefixBuilder) { |
| // Handles the case where the same prefix is used for different |
| // imports. |
| return builder |
| ..exports.merge(other.exports, |
| (String name, Builder existing, Builder member) { |
| return buildAmbiguousBuilder(name, existing, member, charOffset, |
| isExport: isExport, isImport: isImport); |
| }); |
| } |
| } |
| if (isExport) { |
| addNit(charOffset, |
| "'$name' is exported from both '${uri}' and '${otherUri}'."); |
| } else { |
| addNit(charOffset, |
| "'$name' is imported from both '${uri}' and '${otherUri}'."); |
| } |
| return new KernelInvalidTypeBuilder(name, charOffset, fileUri); |
| } |
| |
| int finishStaticInvocations() { |
| CloneVisitor cloner; |
| for (var list in argumentsWithMissingDefaultValues) { |
| final Arguments arguments = list[0]; |
| final FunctionNode function = list[1]; |
| |
| Expression defaultArgumentFrom(Expression expression) { |
| if (expression == null) { |
| return new NullLiteral(); |
| } |
| cloner ??= new CloneVisitor(); |
| return cloner.clone(expression); |
| } |
| |
| for (int i = function.requiredParameterCount; |
| i < function.positionalParameters.length; |
| i++) { |
| arguments.positional[i] ??= |
| defaultArgumentFrom(function.positionalParameters[i].initializer) |
| ..parent = arguments; |
| } |
| Map<String, VariableDeclaration> names; |
| for (NamedExpression expression in arguments.named) { |
| if (expression.value == null) { |
| if (names == null) { |
| names = <String, VariableDeclaration>{}; |
| for (VariableDeclaration parameter in function.namedParameters) { |
| names[parameter.name] = parameter; |
| } |
| } |
| expression.value = |
| defaultArgumentFrom(names[expression.name].initializer) |
| ..parent = expression; |
| } |
| } |
| } |
| return argumentsWithMissingDefaultValues.length; |
| } |
| |
| void addNativeMethod(KernelProcedureBuilder method) { |
| nativeMethods.add(method); |
| } |
| |
| int finishNativeMethods() { |
| for (KernelProcedureBuilder method in nativeMethods) { |
| method.becomeNative(loader); |
| } |
| return nativeMethods.length; |
| } |
| |
| List<TypeVariableBuilder> copyTypeVariables( |
| List<TypeVariableBuilder> original) { |
| List<TypeVariableBuilder> copy = <TypeVariableBuilder>[]; |
| for (KernelTypeVariableBuilder variable in original) { |
| var newVariable = new KernelTypeVariableBuilder( |
| variable.name, this, variable.charOffset); |
| copy.add(newVariable); |
| boundlessTypeVariables.add(newVariable); |
| } |
| Map<TypeVariableBuilder, TypeBuilder> substitution = |
| <TypeVariableBuilder, TypeBuilder>{}; |
| int i = 0; |
| for (KernelTypeVariableBuilder variable in original) { |
| substitution[variable] = copy[i++].asTypeBuilder(); |
| } |
| i = 0; |
| for (KernelTypeVariableBuilder variable in original) { |
| copy[i++].bound = variable.bound?.subst(substitution); |
| } |
| return copy; |
| } |
| |
| int finishTypeVariables(ClassBuilder object) { |
| int count = boundlessTypeVariables.length; |
| for (KernelTypeVariableBuilder builder in boundlessTypeVariables) { |
| builder.finish(this, object); |
| } |
| boundlessTypeVariables.clear(); |
| return count; |
| } |
| |
| @override |
| void includePart(covariant KernelLibraryBuilder part) { |
| super.includePart(part); |
| nativeMethods.addAll(part.nativeMethods); |
| boundlessTypeVariables.addAll(part.boundlessTypeVariables); |
| assert(mixinApplicationClasses.isEmpty); |
| } |
| } |