| // 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.body_builder; |
| |
| import '../fasta_codes.dart' |
| show FastaMessage, codeExpectedButGot, codeExpectedFunctionBody; |
| |
| import '../parser/parser.dart' show FormalParameterType, optional; |
| |
| import '../parser/identifier_context.dart' show IdentifierContext; |
| |
| import 'package:front_end/src/fasta/builder/ast_factory.dart' show AstFactory; |
| |
| import 'package:front_end/src/fasta/kernel/kernel_shadow_ast.dart' |
| show KernelField, KernelVariableDeclaration; |
| |
| import 'package:front_end/src/fasta/type_inference/type_inferrer.dart' |
| show FieldNode, TypeInferrer; |
| |
| import 'package:kernel/ast.dart'; |
| |
| import 'package:kernel/clone.dart' show CloneVisitor; |
| |
| import 'package:kernel/transformations/flags.dart' show TransformerFlag; |
| |
| import 'package:kernel/class_hierarchy.dart' show ClassHierarchy; |
| |
| import 'package:kernel/core_types.dart' show CoreTypes; |
| |
| import 'frontend_accessors.dart' show buildIsNull, makeBinary, makeLet; |
| |
| import '../parser/dart_vm_native.dart' show skipNativeClause; |
| |
| import '../scanner/token.dart' |
| show BeginGroupToken, Token, isBinaryOperator, isMinusOperator; |
| |
| import '../errors.dart' show formatUnexpected, internalError; |
| |
| import '../source/scope_listener.dart' |
| show JumpTargetKind, NullValue, ScopeListener; |
| |
| import '../scope.dart' show ProblemBuilder; |
| |
| import '../source/outline_builder.dart' show asyncMarkerFromTokens; |
| |
| import 'fasta_accessors.dart'; |
| |
| import '../quote.dart' |
| show |
| Quote, |
| analyzeQuote, |
| unescape, |
| unescapeFirstStringPart, |
| unescapeLastStringPart, |
| unescapeString; |
| |
| import '../modifier.dart' show Modifier, constMask, finalMask; |
| |
| import 'redirecting_factory_body.dart' show getRedirectionTarget; |
| |
| import 'kernel_builder.dart'; |
| |
| import '../names.dart'; |
| |
| class BodyBuilder extends ScopeListener<JumpTarget> implements BuilderHelper { |
| final KernelLibraryBuilder library; |
| |
| final MemberBuilder member; |
| |
| final KernelClassBuilder classBuilder; |
| |
| final ClassHierarchy hierarchy; |
| |
| final CoreTypes coreTypes; |
| |
| final bool isInstanceMember; |
| |
| final Map<String, FieldInitializer> fieldInitializers = |
| <String, FieldInitializer>{}; |
| |
| final Scope enclosingScope; |
| |
| final bool isDartLibrary; |
| |
| @override |
| final Uri uri; |
| |
| final TypeInferrer<Statement, Expression, KernelVariableDeclaration, |
| KernelField> _typeInferrer; |
| |
| final AstFactory astFactory; |
| |
| /// If not `null`, dependencies on fields are accumulated into this list. |
| /// |
| /// If `null`, no dependency information is recorded. |
| final List<FieldNode<KernelField>> fieldDependencies; |
| |
| /// Only used when [member] is a constructor. It tracks if an implicit super |
| /// initializer is needed. |
| /// |
| /// An implicit super initializer isn't needed |
| /// |
| /// 1. if the current class is Object, |
| /// 2. if there is an explicit super initializer, |
| /// 3. if there is a redirecting (this) initializer, or |
| /// 4. if a compile-time error prevented us from generating code for an |
| /// initializer. This avoids cascading errors. |
| bool needsImplicitSuperInitializer; |
| |
| Scope formalParameterScope; |
| |
| bool inInitializer = false; |
| |
| bool inCatchClause = false; |
| |
| bool inCatchBlock = false; |
| |
| int functionNestingLevel = 0; |
| |
| Statement compileTimeErrorInTry; |
| |
| Statement compileTimeErrorInLoopOrSwitch; |
| |
| Scope switchScope; |
| |
| CloneVisitor cloner; |
| |
| bool constantExpressionRequired = false; |
| |
| DartType currentLocalVariableType; |
| |
| // Using non-null value to initialize this field based on performance advice |
| // from VM engineers. TODO(ahe): Does this still apply? |
| int currentLocalVariableModifiers = -1; |
| |
| BodyBuilder( |
| KernelLibraryBuilder library, |
| this.member, |
| Scope scope, |
| this.formalParameterScope, |
| this.hierarchy, |
| this.coreTypes, |
| this.classBuilder, |
| this.isInstanceMember, |
| this.uri, |
| this._typeInferrer, |
| this.astFactory, |
| {this.fieldDependencies}) |
| : enclosingScope = scope, |
| library = library, |
| isDartLibrary = library.uri.scheme == "dart", |
| needsImplicitSuperInitializer = |
| coreTypes.objectClass != classBuilder?.cls, |
| super(scope); |
| |
| bool get hasParserError => recoverableErrors.isNotEmpty; |
| |
| bool get inConstructor { |
| return functionNestingLevel == 0 && member is KernelConstructorBuilder; |
| } |
| |
| bool get isInstanceContext { |
| return isInstanceMember || member is KernelConstructorBuilder; |
| } |
| |
| @override |
| void push(Object node) { |
| inInitializer = false; |
| super.push(node); |
| } |
| |
| Expression popForValue() => toValue(pop()); |
| |
| Expression popForEffect() => toEffect(pop()); |
| |
| Expression popForValueIfNotNull(Object value) { |
| return value == null ? null : popForValue(); |
| } |
| |
| @override |
| Expression toValue(Object node) { |
| if (node is FastaAccessor) { |
| return node.buildSimpleRead(); |
| } else if (node is TypeVariableBuilder) { |
| TypeParameterType type = node.buildTypesWithBuiltArguments(library, null); |
| if (!isInstanceContext && type.parameter.parent is Class) { |
| return buildCompileTimeError( |
| "Type variables can only be used in instance methods."); |
| } else { |
| if (constantExpressionRequired) { |
| addCompileTimeError(-1, |
| "Type variable can't be used as a constant expression $type."); |
| } |
| return new TypeLiteral(type); |
| } |
| } else if (node is TypeDeclarationBuilder) { |
| return new TypeLiteral(node.buildTypesWithBuiltArguments(library, null)); |
| } else if (node is KernelTypeBuilder) { |
| return new TypeLiteral(node.build(library)); |
| } else if (node is Expression) { |
| return node; |
| } else if (node is PrefixBuilder) { |
| return buildCompileTimeError("A library can't be used as an expression."); |
| } else if (node is ProblemBuilder) { |
| return buildProblemExpression(node, -1); |
| } else { |
| return internalError("Unhandled: ${node.runtimeType}"); |
| } |
| } |
| |
| Expression toEffect(Object node) { |
| if (node is FastaAccessor) return node.buildForEffect(); |
| return toValue(node); |
| } |
| |
| List<Expression> popListForValue(int n) { |
| List<Expression> list = |
| new List<Expression>.filled(n, null, growable: true); |
| for (int i = n - 1; i >= 0; i--) { |
| list[i] = popForValue(); |
| } |
| return list; |
| } |
| |
| List<Expression> popListForEffect(int n) { |
| List<Expression> list = |
| new List<Expression>.filled(n, null, growable: true); |
| for (int i = n - 1; i >= 0; i--) { |
| list[i] = popForEffect(); |
| } |
| return list; |
| } |
| |
| Block popBlock(int count, int charOffset) { |
| List<dynamic /*Statement | List<Statement>*/ > statements = |
| popList(count) ?? <Statement>[]; |
| List<Statement> copy; |
| for (int i = 0; i < statements.length; i++) { |
| var statement = statements[i]; |
| if (statement is List) { |
| copy ??= new List<Statement>.from(statements.getRange(0, i)); |
| // TODO(sigmund): remove this assignment (issue #28651) |
| Iterable subStatements = statement; |
| copy.addAll(subStatements); |
| } else if (copy != null) { |
| copy.add(statement); |
| } |
| } |
| return astFactory.block(copy ?? statements, charOffset); |
| } |
| |
| Statement popStatementIfNotNull(Object value) { |
| return value == null ? null : popStatement(); |
| } |
| |
| Statement popStatement() { |
| var statement = pop(); |
| if (statement is List) { |
| return new Block(new List<Statement>.from(statement)); |
| } else if (statement is VariableDeclaration) { |
| return new Block(<Statement>[statement]); |
| } else { |
| return statement; |
| } |
| } |
| |
| void ignore(Unhandled value) { |
| pop(); |
| } |
| |
| void enterSwitchScope() { |
| push(switchScope ?? NullValue.SwitchScope); |
| switchScope = scope; |
| } |
| |
| void exitSwitchScope() { |
| Scope outerSwitchScope = pop(); |
| if (switchScope.unclaimedForwardDeclarations != null) { |
| switchScope.unclaimedForwardDeclarations |
| .forEach((String name, Builder builder) { |
| if (outerSwitchScope == null) { |
| addCompileTimeError(-1, "Label not found: '$name'."); |
| } else { |
| outerSwitchScope.forwardDeclareLabel(name, builder); |
| } |
| }); |
| } |
| switchScope = outerSwitchScope; |
| } |
| |
| @override |
| JumpTarget createJumpTarget(JumpTargetKind kind, int charOffset) { |
| return new JumpTarget(kind, functionNestingLevel, member, charOffset); |
| } |
| |
| @override |
| void endMetadata(Token beginToken, Token periodBeforeName, Token endToken) { |
| debugEvent("Metadata"); |
| pop(); // Arguments. |
| popIfNotNull(periodBeforeName); // Postfix. |
| pop(); // Type arguments. |
| pop(); // Expression or type name (depends on arguments). |
| // TODO(ahe): Implement metadata on local declarations. |
| } |
| |
| @override |
| void endMetadataStar(int count, bool forParameter) { |
| debugEvent("MetadataStar"); |
| push(NullValue.Metadata); |
| } |
| |
| @override |
| void endTopLevelFields(int count, Token beginToken, Token endToken) { |
| debugEvent("TopLevelFields"); |
| doFields(count); |
| // There's no metadata here because of a slight assymetry between |
| // [parseTopLevelMember] and [parseMember]. This assymetry leads to |
| // DietListener discarding top-level member metadata. |
| } |
| |
| @override |
| void endFields( |
| int count, Token covariantKeyword, Token beginToken, Token endToken) { |
| debugEvent("Fields"); |
| doFields(count); |
| pop(); // Metadata. |
| } |
| |
| void doFields(int count) { |
| for (int i = 0; i < count; i++) { |
| Expression initializer = pop(); |
| Identifier identifier = pop(); |
| if (initializer != null) { |
| String name = identifier.name; |
| FieldBuilder field; |
| if (classBuilder != null) { |
| field = classBuilder[name]; |
| } else { |
| field = library[name]; |
| } |
| if (field.next != null) { |
| // TODO(ahe): This can happen, for example, if a final field is |
| // combined with a setter. |
| internalError( |
| "Unhandled: '${field.name}' has more than one declaration."); |
| } |
| field.initializer = initializer; |
| } |
| } |
| pop(); // Type. |
| pop(); // Modifiers. |
| } |
| |
| @override |
| void endMember() { |
| debugEvent("Member"); |
| checkEmpty(-1); |
| } |
| |
| @override |
| void endBlockFunctionBody(int count, Token beginToken, Token endToken) { |
| debugEvent("BlockFunctionBody"); |
| if (beginToken == null) { |
| assert(count == 0); |
| push(NullValue.Block); |
| } else { |
| Block block = popBlock(count, beginToken.charOffset); |
| exitLocalScope(); |
| push(block); |
| } |
| } |
| |
| @override |
| void prepareInitializers() { |
| scope = formalParameterScope; |
| assert(fieldInitializers.isEmpty); |
| final member = this.member; |
| if (member is KernelConstructorBuilder) { |
| Constructor constructor = member.constructor; |
| classBuilder.forEach((String name, Builder builder) { |
| if (builder is KernelFieldBuilder && builder.isInstanceMember) { |
| // TODO(ahe): Compute initializers (as in `field = initializer`). |
| fieldInitializers[name] = new FieldInitializer(builder.field, null) |
| ..parent = constructor; |
| } |
| }); |
| if (member.formals != null) { |
| for (KernelFormalParameterBuilder formal in member.formals) { |
| if (formal.hasThis) { |
| FieldInitializer initializer = fieldInitializers[formal.name]; |
| if (initializer != null) { |
| fieldInitializers.remove(formal.name); |
| initializer.value = new VariableGet(formal.declaration) |
| ..parent = initializer; |
| member.addInitializer(initializer); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| @override |
| void beginInitializer(Token token) { |
| debugEvent("beginInitializer"); |
| inInitializer = true; |
| } |
| |
| @override |
| void endInitializer(Token token) { |
| debugEvent("endInitializer"); |
| assert(!inInitializer); |
| final member = this.member; |
| var node = pop(); |
| Initializer initializer; |
| if (node is Initializer) { |
| initializer = node; |
| } else if (node is FastaAccessor) { |
| initializer = node.buildFieldInitializer(fieldInitializers); |
| } else if (node is ConstructorInvocation) { |
| initializer = |
| buildSuperInitializer(node.target, node.arguments, token.charOffset); |
| } else { |
| if (node is! Throw) { |
| // TODO(ahe): This is probably an internal error. |
| needsImplicitSuperInitializer = false; |
| node = wrapInvalid(node); |
| } |
| initializer = buildInvalidIntializer(node, token.charOffset); |
| } |
| if (member is KernelConstructorBuilder) { |
| member.addInitializer(initializer); |
| } else { |
| addCompileTimeError( |
| token.charOffset, "Can't have initializers: ${member.name}"); |
| } |
| } |
| |
| @override |
| void handleNoInitializers() { |
| debugEvent("NoInitializers"); |
| } |
| |
| @override |
| void endInitializers(int count, Token beginToken, Token endToken) { |
| debugEvent("Initializers"); |
| } |
| |
| @override |
| void finishFunction( |
| FormalParameters formals, AsyncMarker asyncModifier, Statement body) { |
| debugEvent("finishFunction"); |
| _typeInferrer.inferBody(body, uri); |
| KernelFunctionBuilder builder = member; |
| builder.body = body; |
| if (formals?.optional != null) { |
| Iterator<FormalParameterBuilder> formalBuilders = |
| builder.formals.skip(formals.required.length).iterator; |
| for (VariableDeclaration parameter in formals.optional.formals) { |
| bool hasMore = formalBuilders.moveNext(); |
| assert(hasMore); |
| VariableDeclaration realParameter = formalBuilders.current.target; |
| Expression initializer = parameter.initializer ?? new NullLiteral(); |
| realParameter.initializer = initializer..parent = realParameter; |
| } |
| } |
| if (builder is KernelConstructorBuilder) { |
| finishConstructor(builder, asyncModifier); |
| } else if (builder is KernelProcedureBuilder) { |
| builder.asyncModifier = asyncModifier; |
| } else { |
| internalError("Unhandled: ${builder.runtimeType}"); |
| } |
| } |
| |
| void finishConstructor( |
| KernelConstructorBuilder builder, AsyncMarker asyncModifier) { |
| /// Quotes below are from [Dart Programming Language Specification, 4th |
| /// Edition]( |
| /// https://ecma-international.org/publications/files/ECMA-ST/ECMA-408.pdf). |
| assert(builder == member); |
| Constructor constructor = builder.constructor; |
| if (asyncModifier != AsyncMarker.Sync) { |
| // TODO(ahe): Change this to a null check. |
| int offset = builder.body?.fileOffset ?? builder.charOffset; |
| constructor.initializers.add(buildInvalidIntializer( |
| buildCompileTimeError( |
| "A constructor can't be '${asyncModifier}'.", offset), |
| offset)); |
| } |
| if (needsImplicitSuperInitializer) { |
| /// >If no superinitializer is provided, an implicit superinitializer |
| /// >of the form super() is added at the end of k’s initializer list, |
| /// >unless the enclosing class is class Object. |
| Constructor superTarget = lookupConstructor(emptyName, isSuper: true); |
| Initializer initializer; |
| Arguments arguments = new Arguments.empty(); |
| if (superTarget == null || |
| !checkArguments( |
| superTarget.function, arguments, const <TypeParameter>[])) { |
| String superclass = classBuilder.supertype.fullNameForErrors; |
| String message = superTarget == null |
| ? "'$superclass' doesn't have an unnamed constructor." |
| : "The unnamed constructor in '$superclass' requires arguments."; |
| initializer = buildInvalidIntializer( |
| buildCompileTimeError(message, builder.charOffset), |
| builder.charOffset); |
| } else { |
| initializer = |
| buildSuperInitializer(superTarget, arguments, builder.charOffset); |
| } |
| constructor.initializers.add(initializer); |
| } |
| setParents(constructor.initializers, constructor); |
| if (constructor.function.body == null) { |
| /// >If a generative constructor c is not a redirecting constructor |
| /// >and no body is provided, then c implicitly has an empty body {}. |
| /// We use an empty statement instead. |
| constructor.function.body = new EmptyStatement(); |
| constructor.function.body.parent = constructor.function; |
| } |
| } |
| |
| @override |
| void endExpressionStatement(Token token) { |
| debugEvent("ExpressionStatement"); |
| push(new ExpressionStatement(popForEffect())); |
| } |
| |
| @override |
| void endArguments(int count, Token beginToken, Token endToken) { |
| debugEvent("Arguments"); |
| List arguments = popList(count) ?? <Expression>[]; |
| int firstNamedArgumentIndex = arguments.length; |
| for (int i = 0; i < arguments.length; i++) { |
| var node = arguments[i]; |
| if (node is NamedExpression) { |
| firstNamedArgumentIndex = |
| i < firstNamedArgumentIndex ? i : firstNamedArgumentIndex; |
| } else { |
| arguments[i] = toValue(node); |
| if (i > firstNamedArgumentIndex) { |
| arguments[i] = new NamedExpression( |
| "#$i", |
| buildCompileTimeError( |
| "Expected named argument.", arguments[i].fileOffset)); |
| } |
| } |
| } |
| if (firstNamedArgumentIndex < arguments.length) { |
| List<Expression> positional = new List<Expression>.from( |
| arguments.getRange(0, firstNamedArgumentIndex)); |
| List<NamedExpression> named = new List<NamedExpression>.from( |
| arguments.getRange(firstNamedArgumentIndex, arguments.length)); |
| push(new Arguments(positional, named: named)); |
| } else { |
| push(new Arguments(arguments)); |
| } |
| } |
| |
| @override |
| void handleParenthesizedExpression(BeginGroupToken token) { |
| debugEvent("ParenthesizedExpression"); |
| push(new ParenthesizedExpression( |
| this, popForValue(), token.endGroup.charOffset)); |
| } |
| |
| @override |
| void endSend(Token beginToken, Token endToken) { |
| debugEvent("Send"); |
| Arguments arguments = pop(); |
| List<DartType> typeArguments = pop(); |
| Object receiver = pop(); |
| if (arguments != null && typeArguments != null) { |
| arguments.types.addAll(typeArguments); |
| } else { |
| assert(typeArguments == null); |
| } |
| if (receiver is Identifier) { |
| Name name = new Name(receiver.name, library.library); |
| if (arguments == null) { |
| push(new IncompletePropertyAccessor(this, beginToken.charOffset, name)); |
| } else { |
| push(new SendAccessor(this, beginToken.charOffset, name, arguments)); |
| } |
| } else if (arguments == null) { |
| push(receiver); |
| } else { |
| push(finishSend(receiver, arguments, beginToken.charOffset)); |
| } |
| } |
| |
| @override |
| finishSend(Object receiver, Arguments arguments, int charOffset) { |
| bool isIdentical(Object receiver) { |
| return receiver is StaticAccessor && |
| receiver.readTarget == |
| coreTypes.tryGetTopLevelMember("dart:core", null, "identical"); |
| } |
| |
| if (receiver is FastaAccessor) { |
| if (constantExpressionRequired && |
| !isIdentical(receiver) && |
| !receiver.isInitializer) { |
| addCompileTimeError(charOffset, "Not a constant expression."); |
| } |
| return receiver.doInvocation(charOffset, arguments); |
| } else { |
| return buildMethodInvocation( |
| toValue(receiver), callName, arguments, charOffset); |
| } |
| } |
| |
| @override |
| void beginCascade(Token token) { |
| debugEvent("beginCascade"); |
| Expression expression = popForValue(); |
| if (expression is CascadeReceiver) { |
| push(expression); |
| push(new VariableAccessor( |
| this, expression.fileOffset, expression.variable)); |
| expression.extend(); |
| } else { |
| VariableDeclaration variable = |
| new VariableDeclaration.forValue(expression); |
| push(new CascadeReceiver(variable)); |
| push(new VariableAccessor(this, expression.fileOffset, variable)); |
| } |
| } |
| |
| @override |
| void endCascade() { |
| debugEvent("endCascade"); |
| Expression expression = popForEffect(); |
| CascadeReceiver cascadeReceiver = pop(); |
| cascadeReceiver.finalize(expression); |
| push(cascadeReceiver); |
| } |
| |
| @override |
| void handleBinaryExpression(Token token) { |
| debugEvent("BinaryExpression"); |
| if (optional(".", token) || optional("..", token)) { |
| return doDotOrCascadeExpression(token); |
| } |
| if (optional("&&", token) || optional("||", token)) { |
| return doLogicalExpression(token); |
| } |
| if (optional("??", token)) return doIfNull(token); |
| if (optional("?.", token)) return doIfNotNull(token); |
| Expression argument = popForValue(); |
| var receiver = pop(); |
| bool isSuper = false; |
| if (receiver is ThisAccessor && receiver.isSuper) { |
| isSuper = true; |
| receiver = new ThisExpression(); |
| } |
| push(buildBinaryOperator(toValue(receiver), token, argument, isSuper)); |
| } |
| |
| Expression buildBinaryOperator( |
| Expression a, Token token, Expression b, bool isSuper) { |
| bool negate = false; |
| String operator = token.stringValue; |
| if (identical("!=", operator)) { |
| operator = "=="; |
| negate = true; |
| } |
| if (!isBinaryOperator(operator) && !isMinusOperator(operator)) { |
| return buildCompileTimeError( |
| "Not an operator: '$operator'.", token.charOffset); |
| } else { |
| Expression result = |
| makeBinary(a, new Name(operator), null, b, offset: token.charOffset); |
| if (isSuper) { |
| result = toSuperMethodInvocation(result); |
| } |
| return negate ? new Not(result) : result; |
| } |
| } |
| |
| void doLogicalExpression(Token token) { |
| Expression argument = popForValue(); |
| Expression receiver = popForValue(); |
| push(new LogicalExpression(receiver, token.stringValue, argument)); |
| } |
| |
| /// Handle `a ?? b`. |
| void doIfNull(Token token) { |
| Expression b = popForValue(); |
| Expression a = popForValue(); |
| VariableDeclaration variable = new VariableDeclaration.forValue(a); |
| push(makeLet( |
| variable, |
| new ConditionalExpression(buildIsNull(new VariableGet(variable)), b, |
| new VariableGet(variable), const DynamicType()))); |
| } |
| |
| /// Handle `a?.b(...)`. |
| void doIfNotNull(Token token) { |
| IncompleteSend send = pop(); |
| push(send.withReceiver(pop(), isNullAware: true)); |
| } |
| |
| void doDotOrCascadeExpression(Token token) { |
| // TODO(ahe): Handle null-aware. |
| IncompleteSend send = pop(); |
| Object receiver = optional(".", token) ? pop() : popForValue(); |
| push(send.withReceiver(receiver)); |
| } |
| |
| @override |
| Expression toSuperMethodInvocation(MethodInvocation node) { |
| Member target = lookupSuperMember(node.name); |
| bool isNoSuchMethod = target == null; |
| if (target is Procedure) { |
| if (!target.isAccessor) { |
| if (areArgumentsCompatible(target.function, node.arguments)) { |
| // TODO(ahe): Use [DirectMethodInvocation] when possible. |
| Expression result = new DirectMethodInvocation( |
| new ThisExpression(), target, node.arguments); |
| result = new SuperMethodInvocation(node.name, node.arguments, null); |
| return result; |
| } else { |
| isNoSuchMethod = true; |
| } |
| } |
| } |
| if (isNoSuchMethod) { |
| return throwNoSuchMethodError( |
| node.name.name, node.arguments, node.fileOffset, |
| isSuper: true); |
| } |
| // TODO(ahe): Use [DirectPropertyGet] when possible. |
| Expression receiver = new DirectPropertyGet(new ThisExpression(), target); |
| receiver = new SuperPropertyGet(node.name, target); |
| return buildMethodInvocation( |
| receiver, callName, node.arguments, node.fileOffset); |
| } |
| |
| bool areArgumentsCompatible(FunctionNode function, Arguments arguments) { |
| // TODO(ahe): Implement this. |
| return true; |
| } |
| |
| @override |
| Expression throwNoSuchMethodError( |
| String name, Arguments arguments, int charOffset, |
| {bool isSuper: false, isGetter: false, isSetter: false}) { |
| String errorName = isSuper ? "super.$name" : name; |
| String message; |
| if (isGetter) { |
| message = "Getter not found: '$errorName'."; |
| } else if (isSetter) { |
| message = "Setter not found: '$errorName'."; |
| } else { |
| message = "Method not found: '$errorName'."; |
| } |
| if (constantExpressionRequired) { |
| return buildCompileTimeError(message, charOffset); |
| } |
| warning(message, charOffset); |
| Constructor constructor = |
| coreTypes.getClass("dart:core", "NoSuchMethodError").constructors.first; |
| return new Throw(new ConstructorInvocation( |
| constructor, |
| new Arguments(<Expression>[ |
| new NullLiteral(), |
| new SymbolLiteral(name), |
| new ListLiteral(arguments.positional), |
| new MapLiteral(arguments.named.map((arg) { |
| return new MapEntry(new SymbolLiteral(arg.name), arg.value); |
| }).toList()), |
| new NullLiteral() |
| ]))); |
| } |
| |
| @override |
| Member lookupSuperMember(Name name, {bool isSetter: false}) { |
| Class superclass = classBuilder.cls.superclass; |
| return superclass == null |
| ? null |
| : hierarchy.getDispatchTarget(superclass, name, setter: isSetter); |
| } |
| |
| @override |
| Constructor lookupConstructor(Name name, {bool isSuper}) { |
| Class cls = classBuilder.cls; |
| if (isSuper) { |
| cls = cls.superclass; |
| while (cls.isMixinApplication) { |
| cls = cls.superclass; |
| } |
| } |
| if (cls != null) { |
| for (Constructor constructor in cls.constructors) { |
| if (constructor.name == name) return constructor; |
| } |
| } |
| return null; |
| } |
| |
| @override |
| void handleIdentifier(Token token, IdentifierContext context) { |
| debugEvent("handleIdentifier"); |
| String name = token.lexeme; |
| if (context.isScopeReference) { |
| assert(!inInitializer || |
| this.scope == enclosingScope || |
| this.scope.parent == enclosingScope); |
| // This deals with this kind of initializer: `C(a) : a = a;` |
| Scope scope = inInitializer ? enclosingScope : this.scope; |
| push(scopeLookup(scope, name, token.charOffset)); |
| return; |
| } else if (context.inDeclaration) { |
| if (context == IdentifierContext.topLevelVariableDeclaration || |
| context == IdentifierContext.fieldDeclaration) { |
| constantExpressionRequired = member.isConst; |
| } |
| } else if (constantExpressionRequired && |
| !context.allowedInConstantExpression) { |
| addCompileTimeError( |
| token.charOffset, "Not a constant expression: $context"); |
| } |
| push(new Identifier(name, token.charOffset)); |
| } |
| |
| /// Look up [name] in [scope] using [charOffset] to report any |
| /// problems. [isQualified] should be true if [name] is a qualified access |
| /// (which implies that it shouldn't be turned into a [ThisPropertyAccessor] |
| /// if the name doesn't resolve in the scope). |
| @override |
| scopeLookup(Scope scope, String name, int charOffset, |
| {bool isQualified: false, PrefixBuilder prefix}) { |
| Builder builder = scope.lookup(name, charOffset, uri); |
| if (builder == null || (!isInstanceContext && builder.isInstanceMember)) { |
| Name n = new Name(name, library.library); |
| if (prefix != null && |
| prefix.deferred && |
| builder == null && |
| "loadLibrary" == name) { |
| return buildCompileTimeError( |
| "Deferred loading isn't implemented yet.", charOffset); |
| } else if (!isQualified && isInstanceContext) { |
| assert(builder == null); |
| if (constantExpressionRequired) { |
| return new UnresolvedAccessor(this, n, charOffset); |
| } |
| return new ThisPropertyAccessor(this, charOffset, n, null, null); |
| } else if (isDartLibrary && |
| name == "main" && |
| library.uri.path == "_builtin" && |
| member?.name == "_getMainClosure") { |
| // TODO(ahe): https://github.com/dart-lang/sdk/issues/28989 |
| return new NullLiteral()..fileOffset = charOffset; |
| } else { |
| return new UnresolvedAccessor(this, n, charOffset); |
| } |
| } else if (builder.isTypeDeclaration) { |
| if (constantExpressionRequired && |
| builder.isTypeVariable && |
| !member.isConstructor) { |
| addCompileTimeError(charOffset, "Not a constant expression."); |
| } |
| return builder; |
| } else if (builder.isLocal) { |
| if (constantExpressionRequired && |
| !builder.isConst && |
| !member.isConstructor) { |
| addCompileTimeError(charOffset, "Not a constant expression."); |
| } |
| return new VariableAccessor(this, charOffset, builder.target); |
| } else if (builder.isInstanceMember) { |
| if (constantExpressionRequired && |
| !inInitializer && |
| // TODO(ahe): This is a hack because Fasta sets up the scope |
| // "this.field" parameters according to old semantics. Under the new |
| // semantics, such parameters introduces a new parameter with that |
| // name that should be resolved here. |
| !member.isConstructor) { |
| addCompileTimeError(charOffset, "Not a constant expression."); |
| } |
| return new ThisPropertyAccessor( |
| this, charOffset, new Name(name, library.library), null, null); |
| } else if (builder.isRegularMethod) { |
| assert(builder.isStatic || builder.isTopLevel); |
| return new StaticAccessor(this, charOffset, builder.target, null); |
| } else if (builder is PrefixBuilder) { |
| if (constantExpressionRequired && builder.deferred) { |
| addCompileTimeError( |
| charOffset, |
| "'$name' can't be used in a constant expression because it's " |
| "marked as 'deferred' which means it isn't available until " |
| "loaded.\n" |
| "You might try moving the constant to the deferred library, " |
| "or removing 'deferred' from the import."); |
| } |
| return builder; |
| } else { |
| if (builder.hasProblem && builder is! AccessErrorBuilder) return builder; |
| Builder setter; |
| if (builder.isSetter) { |
| setter = builder; |
| } else if (builder.isGetter) { |
| setter = scope.lookupSetter(name, charOffset, uri); |
| } else if (builder.isField && !builder.isFinal) { |
| setter = builder; |
| } |
| StaticAccessor accessor = |
| new StaticAccessor.fromBuilder(this, builder, charOffset, setter); |
| if (constantExpressionRequired) { |
| Member readTarget = accessor.readTarget; |
| if (!(readTarget is Field && readTarget.isConst || |
| // Static tear-offs are also compile time constants. |
| readTarget is Procedure)) { |
| addCompileTimeError(charOffset, "Not a constant expression."); |
| } |
| } |
| return accessor; |
| } |
| } |
| |
| @override |
| void handleQualified(Token period) { |
| debugEvent("Qualified"); |
| Identifier name = pop(); |
| var receiver = pop(); |
| push([receiver, name]); |
| } |
| |
| @override |
| void beginLiteralString(Token token) { |
| debugEvent("beginLiteralString"); |
| push(token); |
| } |
| |
| @override |
| void handleStringPart(Token token) { |
| debugEvent("StringPart"); |
| push(token); |
| } |
| |
| @override |
| void endLiteralString(int interpolationCount, Token endToken) { |
| debugEvent("endLiteralString"); |
| if (interpolationCount == 0) { |
| Token token = pop(); |
| push(new StringLiteral(unescapeString(token.lexeme)) |
| ..fileOffset = token.charOffset); |
| } else { |
| List parts = popList(1 + interpolationCount * 2); |
| Token first = parts.first; |
| Token last = parts.last; |
| Quote quote = analyzeQuote(first.lexeme); |
| List<Expression> expressions = <Expression>[]; |
| // Contains more than just \' or \". |
| if (first.lexeme.length > 1) { |
| expressions.add( |
| new StringLiteral(unescapeFirstStringPart(first.lexeme, quote))); |
| } |
| for (int i = 1; i < parts.length - 1; i++) { |
| var part = parts[i]; |
| if (part is Token) { |
| if (part.lexeme.length != 0) { |
| expressions.add(new StringLiteral(unescape(part.lexeme, quote))); |
| } |
| } else { |
| expressions.add(toValue(part)); |
| } |
| } |
| // Contains more than just \' or \". |
| if (last.lexeme.length > 1) { |
| expressions |
| .add(new StringLiteral(unescapeLastStringPart(last.lexeme, quote))); |
| } |
| push(new StringConcatenation(expressions) |
| ..fileOffset = endToken.charOffset); |
| } |
| } |
| |
| @override |
| void handleScript(Token token) { |
| debugEvent("Script"); |
| } |
| |
| @override |
| void handleStringJuxtaposition(int literalCount) { |
| debugEvent("StringJuxtaposition"); |
| List<Expression> parts = popListForValue(literalCount); |
| List<Expression> expressions; |
| // Flatten string juxtapositions of string interpolation. |
| for (int i = 0; i < parts.length; i++) { |
| Expression part = parts[i]; |
| if (part is StringConcatenation) { |
| if (expressions == null) { |
| expressions = parts.sublist(0, i); |
| } |
| expressions.addAll(part.expressions); |
| } else { |
| if (expressions != null) { |
| expressions.add(part); |
| } |
| } |
| } |
| push(new StringConcatenation(expressions ?? parts)); |
| } |
| |
| @override |
| void handleLiteralInt(Token token) { |
| debugEvent("LiteralInt"); |
| push(astFactory.intLiteral(int.parse(token.lexeme), token.charOffset)); |
| } |
| |
| @override |
| void handleEmptyFunctionBody(Token semicolon) { |
| debugEvent("ExpressionFunctionBody"); |
| endBlockFunctionBody(0, null, semicolon); |
| } |
| |
| @override |
| void handleExpressionFunctionBody(Token arrowToken, Token endToken) { |
| debugEvent("ExpressionFunctionBody"); |
| endReturnStatement(true, arrowToken.next, endToken); |
| } |
| |
| @override |
| void endReturnStatement( |
| bool hasExpression, Token beginToken, Token endToken) { |
| debugEvent("ReturnStatement"); |
| Expression expression = hasExpression ? popForValue() : null; |
| if (expression != null && inConstructor) { |
| push(buildCompileTimeErrorStatement( |
| "Can't return from a constructor.", beginToken.charOffset)); |
| } else { |
| push(new ReturnStatement(expression)..fileOffset = beginToken.charOffset); |
| } |
| } |
| |
| @override |
| void endIfStatement(Token ifToken, Token elseToken) { |
| Statement elsePart = popStatementIfNotNull(elseToken); |
| Statement thenPart = popStatement(); |
| Expression condition = popForValue(); |
| push(new IfStatement(condition, thenPart, elsePart)); |
| } |
| |
| @override |
| void endVariableInitializer(Token assignmentOperator) { |
| debugEvent("VariableInitializer"); |
| assert(assignmentOperator.stringValue == "="); |
| pushNewLocalVariable(popForValue(), |
| equalsCharOffset: assignmentOperator.charOffset); |
| } |
| |
| @override |
| void handleNoVariableInitializer(Token token) { |
| debugEvent("NoVariableInitializer"); |
| pushNewLocalVariable(null); |
| } |
| |
| void pushNewLocalVariable(Expression initializer, |
| {int equalsCharOffset: TreeNode.noOffset}) { |
| Identifier identifier = pop(); |
| assert(currentLocalVariableModifiers != -1); |
| bool isConst = (currentLocalVariableModifiers & constMask) != 0; |
| bool isFinal = (currentLocalVariableModifiers & finalMask) != 0; |
| assert(isConst == constantExpressionRequired); |
| push(astFactory.variableDeclaration(identifier.name, identifier.fileOffset, |
| initializer: initializer, |
| type: currentLocalVariableType, |
| isFinal: isFinal, |
| isConst: isConst, |
| equalsCharOffset: equalsCharOffset)); |
| } |
| |
| @override |
| void endFieldInitializer(Token assignmentOperator, Token token) { |
| debugEvent("FieldInitializer"); |
| assert(assignmentOperator.stringValue == "="); |
| push(popForValue()); |
| } |
| |
| @override |
| void handleNoFieldInitializer(Token token) { |
| debugEvent("NoFieldInitializer"); |
| if (constantExpressionRequired) { |
| addCompileTimeError( |
| token.charOffset, "const field must have initializer."); |
| // Creating a null value to prevent the Dart VM from crashing. |
| push(new NullLiteral()..fileOffset = token.charOffset); |
| } else { |
| push(NullValue.FieldInitializer); |
| } |
| } |
| |
| @override |
| void endInitializedIdentifier(Token nameToken) { |
| // TODO(ahe): Use [InitializedIdentifier] here? |
| debugEvent("InitializedIdentifier"); |
| VariableDeclaration variable = pop(); |
| variable.fileOffset = nameToken.charOffset; |
| push(variable); |
| scope[variable.name] = new KernelVariableBuilder( |
| variable, member ?? classBuilder ?? library, uri); |
| } |
| |
| @override |
| void beginVariablesDeclaration(Token token) { |
| debugEvent("beginVariablesDeclaration"); |
| DartType type = pop(); |
| int modifiers = Modifier.validate(pop()); |
| super.push(currentLocalVariableModifiers); |
| super.push(currentLocalVariableType ?? NullValue.Type); |
| currentLocalVariableType = type; |
| currentLocalVariableModifiers = modifiers; |
| super.push(constantExpressionRequired); |
| constantExpressionRequired = (modifiers & constMask) != 0; |
| } |
| |
| @override |
| void endVariablesDeclaration(int count, Token endToken) { |
| debugEvent("VariablesDeclaration"); |
| List<VariableDeclaration> variables = popList(count); |
| constantExpressionRequired = pop(); |
| currentLocalVariableType = pop(); |
| currentLocalVariableModifiers = pop(); |
| pop(); // Metadata. |
| if (variables.length != 1) { |
| push(variables); |
| } else { |
| push(variables.single); |
| } |
| } |
| |
| @override |
| void endBlock(int count, Token beginToken, Token endToken) { |
| debugEvent("Block"); |
| Block block = popBlock(count, beginToken.charOffset); |
| exitLocalScope(); |
| push(block); |
| } |
| |
| @override |
| void handleAssignmentExpression(Token token) { |
| debugEvent("AssignmentExpression"); |
| Expression value = popForValue(); |
| var accessor = pop(); |
| if (accessor is TypeDeclarationBuilder) { |
| push(wrapInvalid(new TypeLiteral( |
| accessor.buildTypesWithBuiltArguments(library, null)))); |
| } else if (accessor is! FastaAccessor) { |
| push(buildCompileTimeError("Can't assign to this.", token.charOffset)); |
| } else { |
| push(new DelayedAssignment( |
| this, token.charOffset, accessor, value, token.stringValue)); |
| } |
| } |
| |
| @override |
| void enterLoop(int charOffset) { |
| if (peek() is LabelTarget) { |
| LabelTarget target = peek(); |
| enterBreakTarget(charOffset, target.breakTarget); |
| enterContinueTarget(charOffset, target.continueTarget); |
| } else { |
| enterBreakTarget(charOffset); |
| enterContinueTarget(charOffset); |
| } |
| } |
| |
| void exitLoopOrSwitch(Statement statement) { |
| if (compileTimeErrorInLoopOrSwitch != null) { |
| push(compileTimeErrorInLoopOrSwitch); |
| compileTimeErrorInLoopOrSwitch = null; |
| } else { |
| push(statement); |
| } |
| } |
| |
| @override |
| void endForStatement(Token forKeyword, Token leftSeparator, |
| int updateExpressionCount, Token endToken) { |
| debugEvent("ForStatement"); |
| Statement body = popStatement(); |
| List<Expression> updates = popListForEffect(updateExpressionCount); |
| Statement conditionStatement = popStatement(); |
| Expression condition = null; |
| if (conditionStatement is ExpressionStatement) { |
| condition = conditionStatement.expression; |
| } else { |
| assert(conditionStatement is EmptyStatement); |
| } |
| List<VariableDeclaration> variables = <VariableDeclaration>[]; |
| dynamic variableOrExpression = pop(); |
| Statement begin; |
| if (variableOrExpression is FastaAccessor) { |
| variableOrExpression = variableOrExpression.buildForEffect(); |
| } |
| if (variableOrExpression is VariableDeclaration) { |
| variables.add(variableOrExpression); |
| } else if (variableOrExpression is List) { |
| // TODO(sigmund): remove this assignment (see issue #28651) |
| Iterable vars = variableOrExpression; |
| variables.addAll(vars); |
| } else if (variableOrExpression == null) { |
| // Do nothing. |
| } else if (variableOrExpression is Expression) { |
| begin = new ExpressionStatement(variableOrExpression); |
| } else { |
| return internalError("Unhandled: ${variableOrExpression.runtimeType}"); |
| } |
| exitLocalScope(); |
| JumpTarget continueTarget = exitContinueTarget(); |
| JumpTarget breakTarget = exitBreakTarget(); |
| if (continueTarget.hasUsers) { |
| body = new LabeledStatement(body); |
| continueTarget.resolveContinues(body); |
| } |
| Statement result = new ForStatement(variables, condition, updates, body); |
| if (begin != null) { |
| result = new Block(<Statement>[begin, result]); |
| } |
| if (breakTarget.hasUsers) { |
| result = new LabeledStatement(result); |
| breakTarget.resolveBreaks(result); |
| } |
| exitLoopOrSwitch(result); |
| } |
| |
| @override |
| void endAwaitExpression(Token beginToken, Token endToken) { |
| debugEvent("AwaitExpression"); |
| push( |
| new AwaitExpression(popForValue())..fileOffset = beginToken.charOffset); |
| } |
| |
| @override |
| void handleAsyncModifier(Token asyncToken, Token starToken) { |
| debugEvent("AsyncModifier"); |
| push(asyncMarkerFromTokens(asyncToken, starToken)); |
| } |
| |
| @override |
| void handleLiteralList( |
| int count, Token beginToken, Token constKeyword, Token endToken) { |
| debugEvent("LiteralList"); |
| List<Expression> expressions = popListForValue(count); |
| List<DartType> typeArguments = pop(); |
| DartType typeArgument = const DynamicType(); |
| if (typeArguments != null) { |
| typeArgument = typeArguments.first; |
| if (typeArguments.length > 1) { |
| typeArgument = const DynamicType(); |
| warningNotError( |
| "Too many type arguments on List literal.", beginToken.charOffset); |
| } |
| } |
| push(new ListLiteral(expressions, |
| typeArgument: typeArgument, isConst: constKeyword != null) |
| ..fileOffset = constKeyword?.charOffset ?? beginToken.charOffset); |
| } |
| |
| @override |
| void handleLiteralBool(Token token) { |
| debugEvent("LiteralBool"); |
| bool value = optional("true", token); |
| assert(value || optional("false", token)); |
| push(new BoolLiteral(value)..fileOffset = token.charOffset); |
| } |
| |
| @override |
| void handleLiteralDouble(Token token) { |
| debugEvent("LiteralDouble"); |
| push(new DoubleLiteral(double.parse(token.lexeme)) |
| ..fileOffset = token.charOffset); |
| } |
| |
| @override |
| void handleLiteralNull(Token token) { |
| debugEvent("LiteralNull"); |
| push(new NullLiteral()..fileOffset = token.charOffset); |
| } |
| |
| @override |
| void handleLiteralMap( |
| int count, Token beginToken, Token constKeyword, Token endToken) { |
| debugEvent("LiteralMap"); |
| List<MapEntry> entries = popList(count) ?? <MapEntry>[]; |
| List<DartType> typeArguments = pop(); |
| DartType keyType = const DynamicType(); |
| DartType valueType = const DynamicType(); |
| if (typeArguments != null) { |
| if (typeArguments.length != 2) { |
| keyType = const DynamicType(); |
| valueType = const DynamicType(); |
| warningNotError( |
| "Map literal requires two type arguments.", beginToken.charOffset); |
| } else { |
| keyType = typeArguments[0]; |
| valueType = typeArguments[1]; |
| } |
| } |
| push(new MapLiteral(entries, |
| keyType: keyType, valueType: valueType, isConst: constKeyword != null) |
| ..fileOffset = constKeyword?.charOffset ?? beginToken.charOffset); |
| } |
| |
| @override |
| void endLiteralMapEntry(Token colon, Token endToken) { |
| debugEvent("LiteralMapEntry"); |
| Expression value = popForValue(); |
| Expression key = popForValue(); |
| push(new MapEntry(key, value)); |
| } |
| |
| String symbolPartToString(name) { |
| if (name is Identifier) { |
| return name.name; |
| } else if (name is Operator) { |
| return name.name; |
| } else { |
| return internalError("Unhandled: ${name.runtimeType}"); |
| } |
| } |
| |
| @override |
| void endLiteralSymbol(Token hashToken, int identifierCount) { |
| debugEvent("LiteralSymbol"); |
| String value; |
| if (identifierCount == 1) { |
| value = symbolPartToString(popForValue()); |
| } else { |
| List parts = popList(identifierCount); |
| value = symbolPartToString(parts.first); |
| for (int i = 1; i < parts.length; i++) { |
| value += ".${symbolPartToString(parts[i])}"; |
| } |
| } |
| push(new SymbolLiteral(value)); |
| } |
| |
| DartType kernelTypeFromString( |
| String name, List<DartType> arguments, int charOffset) { |
| Builder builder = scope.lookup(name, charOffset, uri); |
| if (builder == null) { |
| warning("Type not found: '$name'.", charOffset); |
| return const DynamicType(); |
| } else { |
| return kernelTypeFromBuilder(builder, arguments, charOffset); |
| } |
| } |
| |
| DartType kernelTypeFromBuilder( |
| Builder builder, List<DartType> arguments, int charOffset) { |
| if (constantExpressionRequired && builder is TypeVariableBuilder) { |
| addCompileTimeError(charOffset, "Not a constant expression."); |
| } |
| if (builder is TypeDeclarationBuilder) { |
| return builder.buildTypesWithBuiltArguments(library, arguments); |
| } else if (builder.hasProblem) { |
| ProblemBuilder problem = builder; |
| addCompileTimeError(charOffset, problem.message); |
| } else { |
| warningNotError( |
| "Not a type: '${builder.fullNameForErrors}'.", charOffset); |
| } |
| // TODO(ahe): Create an error somehow. |
| return const DynamicType(); |
| } |
| |
| @override |
| void handleType(Token beginToken, Token endToken) { |
| // TODO(ahe): The scope is wrong for return types of generic functions. |
| debugEvent("Type"); |
| List<DartType> arguments = pop(); |
| dynamic name = pop(); |
| if (name is List) { |
| if (name.length != 2) { |
| internalError("Unexpected: $name.length"); |
| } |
| var prefix = name[0]; |
| if (prefix is Identifier) { |
| prefix = prefix.name; |
| } |
| var suffix = name[1]; |
| if (suffix is Identifier) { |
| suffix = suffix.name; |
| } |
| Builder builder; |
| if (prefix is Builder) { |
| builder = prefix; |
| } else { |
| builder = scope.lookup(prefix, beginToken.charOffset, uri); |
| } |
| if (builder is PrefixBuilder) { |
| name = scopeLookup(builder.exports, suffix, beginToken.charOffset, |
| isQualified: true, prefix: builder); |
| } else { |
| push(const DynamicType()); |
| addCompileTimeError(beginToken.charOffset, |
| "Can't be used as a type: '${debugName(prefix, suffix)}'."); |
| return; |
| } |
| } |
| if (name is Identifier) { |
| name = name.name; |
| } |
| if (name is FastaAccessor) { |
| warningNotError( |
| "'${beginToken.lexeme}' isn't a type.", beginToken.charOffset); |
| push(const DynamicType()); |
| } else if (name is TypeVariableBuilder && !member.isConstructor) { |
| if (constantExpressionRequired) { |
| addCompileTimeError( |
| beginToken.charOffset, "Not a constant expression."); |
| } |
| push(name.buildTypesWithBuiltArguments(library, arguments)); |
| } else if (name is TypeDeclarationBuilder) { |
| push(name.buildTypesWithBuiltArguments(library, arguments)); |
| } else if (name is TypeBuilder) { |
| push(name.build(library)); |
| } else if (name is Builder) { |
| push(kernelTypeFromBuilder(name, arguments, beginToken.charOffset)); |
| } else if (name is String) { |
| push(kernelTypeFromString(name, arguments, beginToken.charOffset)); |
| } else { |
| internalError("Unhandled: '${name.runtimeType}'."); |
| } |
| if (peek() is TypeParameterType) { |
| TypeParameterType type = peek(); |
| if (!isInstanceContext && type.parameter.parent is Class) { |
| pop(); |
| warning("Type variables can only be used in instance methods.", |
| beginToken.charOffset); |
| push(const DynamicType()); |
| } |
| } |
| } |
| |
| @override |
| void handleVoidKeyword(Token token) { |
| debugEvent("VoidKeyword"); |
| push(const VoidType()); |
| } |
| |
| @override |
| void handleAsOperator(Token operator, Token endToken) { |
| debugEvent("AsOperator"); |
| DartType type = pop(); |
| Expression expression = popForValue(); |
| push(new AsExpression(expression, type)..fileOffset = operator.charOffset); |
| } |
| |
| @override |
| void handleIsOperator(Token operator, Token not, Token endToken) { |
| debugEvent("IsOperator"); |
| DartType type = pop(); |
| Expression expression = popForValue(); |
| expression = new IsExpression(expression, type) |
| ..fileOffset = operator.charOffset; |
| if (not != null) { |
| expression = new Not(expression); |
| } |
| push(expression); |
| } |
| |
| @override |
| void handleConditionalExpression(Token question, Token colon) { |
| debugEvent("ConditionalExpression"); |
| Expression elseExpression = popForValue(); |
| Expression thenExpression = popForValue(); |
| Expression condition = popForValue(); |
| push(new ConditionalExpression( |
| condition, thenExpression, elseExpression, const DynamicType())); |
| } |
| |
| @override |
| void endThrowExpression(Token throwToken, Token endToken) { |
| debugEvent("ThrowExpression"); |
| Expression expression = popForValue(); |
| if (constantExpressionRequired) { |
| push(buildCompileTimeError( |
| "Not a constant expression.", throwToken.charOffset)); |
| } else { |
| push(new Throw(expression)..fileOffset = throwToken.charOffset); |
| } |
| } |
| |
| @override |
| void endFormalParameter(Token covariantKeyword, Token thisKeyword, |
| Token nameToken, FormalParameterType kind) { |
| debugEvent("FormalParameter"); |
| // TODO(ahe): Need beginToken here. |
| int charOffset = thisKeyword?.charOffset; |
| if (thisKeyword != null) { |
| if (!inConstructor) { |
| addCompileTimeError(thisKeyword.charOffset, |
| "'this' parameters can only be used on constructors."); |
| thisKeyword = null; |
| } |
| } |
| Identifier name = pop(); |
| DartType type = pop(); |
| int modifiers = Modifier.validate(pop()); |
| if (inCatchClause) { |
| modifiers |= finalMask; |
| } |
| bool isConst = (modifiers & constMask) != 0; |
| bool isFinal = (modifiers & finalMask) != 0; |
| ignore(Unhandled.Metadata); |
| VariableDeclaration variable; |
| if (!inCatchClause && functionNestingLevel == 0) { |
| dynamic builder = formalParameterScope.lookup(name.name, charOffset, uri); |
| if (builder == null) { |
| if (thisKeyword == null) { |
| internalError("Internal error: formal missing for '${name.name}'"); |
| } else { |
| addCompileTimeError(thisKeyword.charOffset, |
| "'${name.name}' isn't a field in this class."); |
| thisKeyword = null; |
| } |
| } else if (thisKeyword == null) { |
| variable = builder.build(library); |
| variable.initializer = name.initializer; |
| } else if (builder.isField && builder.parent == classBuilder) { |
| FieldBuilder field = builder; |
| if (type != null) { |
| nit("Ignoring type on 'this' parameter '${name.name}'.", |
| thisKeyword.charOffset); |
| } |
| type = field.target.type ?? const DynamicType(); |
| variable = astFactory.variableDeclaration(name.name, name.fileOffset, |
| type: type, |
| initializer: name.initializer, |
| isFinal: isFinal, |
| isConst: isConst); |
| } else { |
| addCompileTimeError( |
| name.fileOffset, "'${name.name}' isn't a field in this class."); |
| } |
| } |
| variable ??= astFactory.variableDeclaration(name.name, name.fileOffset, |
| type: type ?? const DynamicType(), |
| initializer: name.initializer, |
| isFinal: isFinal, |
| isConst: isConst); |
| push(variable); |
| } |
| |
| @override |
| void endOptionalFormalParameters( |
| int count, Token beginToken, Token endToken) { |
| debugEvent("OptionalFormalParameters"); |
| FormalParameterType kind = optional("{", beginToken) |
| ? FormalParameterType.NAMED |
| : FormalParameterType.POSITIONAL; |
| push(new OptionalFormals(kind, popList(count) ?? [])); |
| } |
| |
| @override |
| void beginFunctionTypedFormalParameter(Token token) { |
| debugEvent("beginFunctionTypedFormalParameter"); |
| functionNestingLevel++; |
| } |
| |
| @override |
| void endFunctionTypedFormalParameter( |
| Token covariantKeyword, Token thisKeyword, FormalParameterType kind) { |
| debugEvent("FunctionTypedFormalParameter"); |
| if (inCatchClause || functionNestingLevel != 0) { |
| exitLocalScope(); |
| } |
| FormalParameters formals = pop(); |
| ignore(Unhandled.TypeVariables); |
| Identifier name = pop(); |
| DartType returnType = pop(); |
| push(formals.toFunctionType(returnType)); |
| push(name); |
| functionNestingLevel--; |
| } |
| |
| @override |
| void handleValuedFormalParameter(Token equals, Token token) { |
| debugEvent("ValuedFormalParameter"); |
| Expression initializer = popForValue(); |
| Identifier name = pop(); |
| push(new InitializedIdentifier(name.name, initializer, name.fileOffset)); |
| } |
| |
| @override |
| void handleFormalParameterWithoutValue(Token token) { |
| debugEvent("FormalParameterWithoutValue"); |
| } |
| |
| @override |
| void endFormalParameters(int count, Token beginToken, Token endToken) { |
| debugEvent("FormalParameters"); |
| OptionalFormals optional; |
| if (count > 0 && peek() is OptionalFormals) { |
| optional = pop(); |
| count--; |
| } |
| FormalParameters formals = new FormalParameters( |
| popList(count) ?? <VariableDeclaration>[], |
| optional, |
| beginToken.charOffset); |
| push(formals); |
| if (inCatchClause || functionNestingLevel != 0) { |
| enterLocalScope(formals.computeFormalParameterScope( |
| scope, member ?? classBuilder ?? library)); |
| } |
| } |
| |
| @override |
| void beginCatchClause(Token token) { |
| debugEvent("beginCatchClause"); |
| inCatchClause = true; |
| } |
| |
| @override |
| void endCatchClause(Token token) { |
| debugEvent("CatchClause"); |
| inCatchClause = false; |
| push(inCatchBlock); |
| inCatchBlock = true; |
| } |
| |
| @override |
| void handleCatchBlock(Token onKeyword, Token catchKeyword) { |
| debugEvent("CatchBlock"); |
| Block body = pop(); |
| inCatchBlock = pop(); |
| if (catchKeyword != null) { |
| exitLocalScope(); |
| } |
| FormalParameters catchParameters = popIfNotNull(catchKeyword); |
| DartType type = popIfNotNull(onKeyword) ?? const DynamicType(); |
| VariableDeclaration exception; |
| VariableDeclaration stackTrace; |
| if (catchParameters != null) { |
| if (catchParameters.required.length > 0) { |
| exception = catchParameters.required[0]; |
| } |
| if (catchParameters.required.length > 1) { |
| stackTrace = catchParameters.required[1]; |
| } |
| if (catchParameters.required.length > 2 || |
| catchParameters.optional != null) { |
| body = new Block(<Statement>[new InvalidStatement()]); |
| compileTimeErrorInTry ??= buildCompileTimeErrorStatement( |
| "Invalid catch arguments.", catchKeyword.next.charOffset); |
| } |
| } |
| push(new Catch(exception, body, guard: type, stackTrace: stackTrace)); |
| } |
| |
| @override |
| void endTryStatement(int catchCount, Token tryKeyword, Token finallyKeyword) { |
| Statement finallyBlock = popStatementIfNotNull(finallyKeyword); |
| List<Catch> catches = popList(catchCount); |
| Statement tryBlock = popStatement(); |
| if (compileTimeErrorInTry == null) { |
| if (catches != null) { |
| tryBlock = new TryCatch(tryBlock, catches); |
| } |
| if (finallyBlock != null) { |
| tryBlock = new TryFinally(tryBlock, finallyBlock); |
| } |
| push(tryBlock); |
| } else { |
| push(compileTimeErrorInTry); |
| compileTimeErrorInTry = null; |
| } |
| } |
| |
| @override |
| void handleNoExpression(Token token) { |
| debugEvent("NoExpression"); |
| push(NullValue.Expression); |
| } |
| |
| @override |
| void handleIndexedExpression( |
| Token openCurlyBracket, Token closeCurlyBracket) { |
| debugEvent("IndexedExpression"); |
| Expression index = popForValue(); |
| var receiver = pop(); |
| if (receiver is ThisAccessor && receiver.isSuper) { |
| push(new SuperIndexAccessor(this, receiver.offset, index, |
| lookupSuperMember(indexGetName), lookupSuperMember(indexSetName))); |
| } else { |
| push(IndexAccessor.make(this, openCurlyBracket.charOffset, |
| toValue(receiver), index, null, null)); |
| } |
| } |
| |
| @override |
| void handleUnaryPrefixExpression(Token token) { |
| debugEvent("UnaryPrefixExpression"); |
| var receiver = pop(); |
| if (optional("!", token)) { |
| push(new Not(toValue(receiver))); |
| } else { |
| String operator = token.stringValue; |
| if (optional("-", token)) { |
| operator = "unary-"; |
| } |
| if (receiver is ThisAccessor && receiver.isSuper) { |
| push(toSuperMethodInvocation(buildMethodInvocation( |
| new ThisExpression()..fileOffset = receiver.offset, |
| new Name(operator), |
| new Arguments.empty(), |
| token.charOffset))); |
| } else { |
| push(buildMethodInvocation(toValue(receiver), new Name(operator), |
| new Arguments.empty(), token.charOffset)); |
| } |
| } |
| } |
| |
| Name incrementOperator(Token token) { |
| if (optional("++", token)) return plusName; |
| if (optional("--", token)) return minusName; |
| return internalError("Unknown increment operator: ${token.lexeme}"); |
| } |
| |
| @override |
| void handleUnaryPrefixAssignmentExpression(Token token) { |
| debugEvent("UnaryPrefixAssignmentExpression"); |
| var accessor = pop(); |
| if (accessor is FastaAccessor) { |
| push(accessor.buildPrefixIncrement(incrementOperator(token), |
| offset: token.charOffset)); |
| } else { |
| push(wrapInvalid(toValue(accessor))); |
| } |
| } |
| |
| @override |
| void handleUnaryPostfixAssignmentExpression(Token token) { |
| debugEvent("UnaryPostfixAssignmentExpression"); |
| var accessor = pop(); |
| if (accessor is FastaAccessor) { |
| push(new DelayedPostfixIncrement( |
| this, token.charOffset, accessor, incrementOperator(token), null)); |
| } else { |
| push(wrapInvalid(toValue(accessor))); |
| } |
| } |
| |
| @override |
| void endConstructorReference( |
| Token start, Token periodBeforeName, Token endToken) { |
| debugEvent("ConstructorReference"); |
| // A constructor reference can contain up to three identifiers: |
| // |
| // a) type <type-arguments>? |
| // b) type <type-arguments>? . name |
| // c) prefix . type <type-arguments>? |
| // d) prefix . type <type-arguments>? . name |
| // |
| // This isn't a legal constructor reference: |
| // |
| // type . name <type-arguments> |
| // |
| // But the parser can't tell this from type c) above. |
| // |
| // This method pops 2 (or 3 if periodBeforeName != null) values from the |
| // stack and pushes 3 values: a type, a list of type arguments, and a name. |
| // |
| // If the constructor reference can be resolved, type is either a |
| // ClassBuilder, or a ThisPropertyAccessor. Otherwise, it's an error that |
| // should be handled later. |
| Identifier suffix = popIfNotNull(periodBeforeName); |
| Identifier identifier; |
| List<DartType> typeArguments = pop(); |
| dynamic type = pop(); |
| if (type is List) { |
| var prefix = type[0]; |
| identifier = type[1]; |
| if (prefix is PrefixBuilder) { |
| type = scopeLookup(prefix.exports, identifier.name, start.charOffset, |
| isQualified: true, prefix: prefix); |
| identifier = null; |
| } else if (prefix is ClassBuilder) { |
| type = prefix; |
| } else { |
| type = new Identifier(start.lexeme, start.charOffset); |
| } |
| } |
| String name; |
| if (identifier != null && suffix != null) { |
| name = "${identifier.name}.${suffix.name}"; |
| } else if (identifier != null) { |
| name = identifier.name; |
| } else if (suffix != null) { |
| name = suffix.name; |
| } else { |
| name = ""; |
| } |
| push(type); |
| push(typeArguments ?? NullValue.TypeArguments); |
| push(name); |
| } |
| |
| @override |
| Expression buildStaticInvocation(Member target, Arguments arguments, |
| {bool isConst: false, int charOffset: -1}) { |
| List<TypeParameter> typeParameters = target.function.typeParameters; |
| if (target is Constructor) { |
| assert(!target.enclosingClass.isAbstract); |
| typeParameters = target.enclosingClass.typeParameters; |
| } |
| if (!checkArguments(target.function, arguments, typeParameters)) { |
| return throwNoSuchMethodError(target.name.name, arguments, charOffset); |
| } |
| if (target is Constructor) { |
| return new ConstructorInvocation(target, arguments) |
| ..isConst = isConst |
| ..fileOffset = charOffset; |
| } else { |
| return new StaticInvocation(target, arguments) |
| ..isConst = isConst |
| ..fileOffset = charOffset; |
| } |
| } |
| |
| @override |
| bool checkArguments(FunctionNode function, Arguments arguments, |
| List<TypeParameter> typeParameters) { |
| if (arguments.positional.length < function.requiredParameterCount || |
| arguments.positional.length > function.positionalParameters.length) { |
| return false; |
| } |
| Map<String, VariableDeclaration> names; |
| if (function.namedParameters.isNotEmpty) { |
| names = <String, VariableDeclaration>{}; |
| for (VariableDeclaration parameter in function.namedParameters) { |
| names[parameter.name] = parameter; |
| } |
| } |
| if (arguments.named.isNotEmpty) { |
| if (names == null) return false; |
| for (NamedExpression argument in arguments.named) { |
| VariableDeclaration parameter = names.remove(argument.name); |
| if (parameter == null) { |
| return false; |
| } |
| } |
| } |
| if (typeParameters.length != arguments.types.length) { |
| arguments.types.clear(); |
| for (int i = 0; i < typeParameters.length; i++) { |
| arguments.types.add(const DynamicType()); |
| } |
| } |
| |
| return true; |
| } |
| |
| @override |
| void beginNewExpression(Token token) { |
| debugEvent("beginNewExpression"); |
| super.push(constantExpressionRequired); |
| if (constantExpressionRequired) { |
| addCompileTimeError(token.charOffset, "Not a constant expression."); |
| } |
| constantExpressionRequired = false; |
| } |
| |
| @override |
| void beginConstExpression(Token token) { |
| debugEvent("beginConstExpression"); |
| super.push(constantExpressionRequired); |
| constantExpressionRequired = true; |
| } |
| |
| @override |
| void beginConstLiteral(Token token) { |
| debugEvent("beginConstLiteral"); |
| super.push(constantExpressionRequired); |
| constantExpressionRequired = true; |
| } |
| |
| @override |
| void endConstLiteral(Token token) { |
| debugEvent("endConstLiteral"); |
| var literal = pop(); |
| constantExpressionRequired = pop(); |
| push(literal); |
| } |
| |
| @override |
| void endNewExpression(Token token) { |
| debugEvent("NewExpression"); |
| Token nameToken = token.next; |
| Arguments arguments = pop(); |
| String name = pop(); |
| List<DartType> typeArguments = pop(); |
| var type = pop(); |
| bool savedConstantExpressionRequired = pop(); |
| () { |
| if (arguments == null) { |
| push(buildCompileTimeError("No arguments.", nameToken.charOffset)); |
| return; |
| } |
| |
| if (typeArguments != null) { |
| assert(arguments.types.isEmpty); |
| arguments.types.addAll(typeArguments); |
| } |
| |
| String errorName; |
| if (type is ClassBuilder) { |
| Builder b = type.findConstructorOrFactory(name, token.charOffset, uri); |
| Member target; |
| if (b == null) { |
| // Not found. Reported below. |
| } else if (b.isConstructor) { |
| if (type.isAbstract) { |
| push(evaluateArgumentsBefore( |
| arguments, |
| buildAbstractClassInstantiationError( |
| type.name, nameToken.charOffset))); |
| return; |
| } else { |
| target = b.target; |
| } |
| } else if (b.isFactory) { |
| target = getRedirectionTarget(b.target); |
| if (target == null) { |
| push(buildCompileTimeError( |
| "Cyclic definition of factory '${name}'.", |
| nameToken.charOffset)); |
| return; |
| } |
| } |
| if (target is Constructor || |
| (target is Procedure && target.kind == ProcedureKind.Factory)) { |
| push(buildStaticInvocation(target, arguments, |
| isConst: optional("const", token), |
| charOffset: nameToken.charOffset)); |
| return; |
| } else { |
| errorName = debugName(type.name, name); |
| } |
| } else { |
| errorName = debugName(getNodeName(type), name); |
| } |
| errorName ??= name; |
| push(throwNoSuchMethodError(errorName, arguments, nameToken.charOffset)); |
| }(); |
| constantExpressionRequired = savedConstantExpressionRequired; |
| } |
| |
| @override |
| void endConstExpression(Token token) { |
| debugEvent("endConstExpression"); |
| endNewExpression(token); |
| } |
| |
| @override |
| void endTypeArguments(int count, Token beginToken, Token endToken) { |
| debugEvent("TypeArguments"); |
| push(popList(count)); |
| } |
| |
| @override |
| void handleThisExpression(Token token, IdentifierContext context) { |
| debugEvent("ThisExpression"); |
| if (context.isScopeReference && isInstanceContext) { |
| push(new ThisAccessor(this, token.charOffset, inInitializer)); |
| } else { |
| push(new IncompleteError( |
| this, token.charOffset, "Expected identifier, but got 'this'.")); |
| } |
| } |
| |
| @override |
| void handleSuperExpression(Token token, IdentifierContext context) { |
| debugEvent("SuperExpression"); |
| if (context.isScopeReference && isInstanceContext) { |
| Member member = this.member.target; |
| member.transformerFlags |= TransformerFlag.superCalls; |
| push(new ThisAccessor(this, token.charOffset, inInitializer, |
| isSuper: true)); |
| } else { |
| push(new IncompleteError( |
| this, token.charOffset, "Expected identifier, but got 'super'.")); |
| } |
| } |
| |
| @override |
| void handleNamedArgument(Token colon) { |
| debugEvent("NamedArgument"); |
| Expression value = popForValue(); |
| Identifier identifier = pop(); |
| push(new NamedExpression(identifier.name, value)); |
| } |
| |
| @override |
| void endFunctionName(Token beginToken, Token token) { |
| debugEvent("FunctionName"); |
| Identifier name = pop(); |
| VariableDeclaration variable = astFactory |
| .variableDeclaration(name.name, name.fileOffset, isFinal: true); |
| push(new FunctionDeclaration( |
| variable, new FunctionNode(new InvalidStatement())) |
| ..fileOffset = beginToken.charOffset); |
| scope[variable.name] = new KernelVariableBuilder( |
| variable, member ?? classBuilder ?? library, uri); |
| enterLocalScope(); |
| } |
| |
| void enterFunction() { |
| debugEvent("enterFunction"); |
| functionNestingLevel++; |
| push(switchScope ?? NullValue.SwitchScope); |
| switchScope = null; |
| push(inCatchBlock); |
| inCatchBlock = false; |
| } |
| |
| void exitFunction() { |
| debugEvent("exitFunction"); |
| functionNestingLevel--; |
| inCatchBlock = pop(); |
| switchScope = pop(); |
| } |
| |
| @override |
| void beginFunction(Token token) { |
| debugEvent("beginFunction"); |
| enterFunction(); |
| } |
| |
| @override |
| void beginUnnamedFunction(Token token) { |
| debugEvent("beginUnnamedFunction"); |
| enterFunction(); |
| } |
| |
| @override |
| void endFunction(Token getOrSet, Token endToken) { |
| debugEvent("Function"); |
| Statement body = popStatement(); |
| AsyncMarker asyncModifier = pop(); |
| if (functionNestingLevel != 0) { |
| exitLocalScope(); |
| } |
| FormalParameters formals = pop(); |
| List<TypeParameter> typeParameters = pop(); |
| push(formals.addToFunction(new FunctionNode(body, |
| typeParameters: typeParameters, asyncMarker: asyncModifier) |
| ..fileOffset = formals.charOffset |
| ..fileEndOffset = endToken.charOffset)); |
| } |
| |
| @override |
| void endFunctionDeclaration(Token token) { |
| debugEvent("FunctionDeclaration"); |
| FunctionNode function = pop(); |
| exitLocalScope(); |
| FunctionDeclaration declaration = pop(); |
| function.returnType = pop() ?? const DynamicType(); |
| pop(); // Modifiers. |
| exitFunction(); |
| declaration.function = function; |
| function.parent = declaration; |
| push(declaration); |
| } |
| |
| @override |
| void endUnnamedFunction(Token beginToken, Token token) { |
| debugEvent("UnnamedFunction"); |
| Statement body = popStatement(); |
| AsyncMarker asyncModifier = pop(); |
| exitLocalScope(); |
| FormalParameters formals = pop(); |
| exitFunction(); |
| List<TypeParameter> typeParameters = pop(); |
| FunctionNode function = formals.addToFunction(new FunctionNode(body, |
| typeParameters: typeParameters, asyncMarker: asyncModifier) |
| ..fileOffset = beginToken.charOffset |
| ..fileEndOffset = token.charOffset); |
| push(new FunctionExpression(function)..fileOffset = beginToken.charOffset); |
| } |
| |
| @override |
| void endDoWhileStatement( |
| Token doKeyword, Token whileKeyword, Token endToken) { |
| debugEvent("DoWhileStatement"); |
| Expression condition = popForValue(); |
| Statement body = popStatement(); |
| JumpTarget continueTarget = exitContinueTarget(); |
| JumpTarget breakTarget = exitBreakTarget(); |
| if (continueTarget.hasUsers) { |
| body = new LabeledStatement(body); |
| continueTarget.resolveContinues(body); |
| } |
| Statement result = new DoStatement(body, condition); |
| if (breakTarget.hasUsers) { |
| result = new LabeledStatement(result); |
| breakTarget.resolveBreaks(result); |
| } |
| exitLoopOrSwitch(result); |
| } |
| |
| @override |
| void beginForInExpression(Token token) { |
| enterLocalScope(scope.parent); |
| } |
| |
| @override |
| void endForInExpression(Token token) { |
| debugEvent("ForInExpression"); |
| Expression expression = popForValue(); |
| exitLocalScope(); |
| push(expression ?? NullValue.Expression); |
| } |
| |
| @override |
| void endForIn(Token awaitToken, Token forToken, Token leftParenthesis, |
| Token inKeyword, Token rightParenthesis, Token endToken) { |
| debugEvent("ForIn"); |
| Statement body = popStatement(); |
| Expression expression = popForValue(); |
| var lvalue = pop(); |
| exitLocalScope(); |
| JumpTarget continueTarget = exitContinueTarget(); |
| JumpTarget breakTarget = exitBreakTarget(); |
| if (continueTarget.hasUsers) { |
| body = new LabeledStatement(body); |
| continueTarget.resolveContinues(body); |
| } |
| VariableDeclaration variable; |
| if (lvalue is VariableDeclaration) { |
| variable = lvalue; |
| } else if (lvalue is FastaAccessor) { |
| /// We are in this case, where `lvalue` isn't a [VariableDeclaration]: |
| /// |
| /// for (lvalue in expression) body |
| /// |
| /// This is normalized to: |
| /// |
| /// for (final #t in expression) { |
| /// lvalue = #t; |
| /// body; |
| /// } |
| variable = new VariableDeclaration.forValue(null); |
| body = combineStatements( |
| new ExpressionStatement(lvalue |
| .buildAssignment(new VariableGet(variable), voidContext: true)), |
| body); |
| } else { |
| variable = new VariableDeclaration.forValue(buildCompileTimeError( |
| "Expected lvalue, but got ${lvalue}", forToken.next.next.charOffset)); |
| } |
| Statement result = new ForInStatement(variable, expression, body, |
| isAsync: awaitToken != null) |
| ..fileOffset = body.fileOffset; |
| if (breakTarget.hasUsers) { |
| result = new LabeledStatement(result); |
| breakTarget.resolveBreaks(result); |
| } |
| exitLoopOrSwitch(result); |
| } |
| |
| @override |
| void handleLabel(Token token) { |
| debugEvent("Label"); |
| Identifier identifier = pop(); |
| push(new Label(identifier.name)); |
| } |
| |
| @override |
| void beginLabeledStatement(Token token, int labelCount) { |
| debugEvent("beginLabeledStatement"); |
| List<Label> labels = popList(labelCount); |
| enterLocalScope(scope.createNestedLabelScope()); |
| LabelTarget target = |
| new LabelTarget(member, functionNestingLevel, token.charOffset); |
| for (Label label in labels) { |
| scope.declareLabel(label.name, target); |
| } |
| push(target); |
| } |
| |
| @override |
| void endLabeledStatement(int labelCount) { |
| debugEvent("LabeledStatement"); |
| Statement statement = popStatement(); |
| LabelTarget target = pop(); |
| exitLocalScope(); |
| if (target.breakTarget.hasUsers) { |
| if (statement is! LabeledStatement) { |
| statement = new LabeledStatement(statement); |
| } |
| target.breakTarget.resolveBreaks(statement); |
| } |
| if (target.continueTarget.hasUsers) { |
| if (statement is! LabeledStatement) { |
| statement = new LabeledStatement(statement); |
| } |
| target.continueTarget.resolveContinues(statement); |
| } |
| push(statement); |
| } |
| |
| @override |
| void endRethrowStatement(Token throwToken, Token endToken) { |
| debugEvent("RethrowStatement"); |
| if (inCatchBlock) { |
| push(new ExpressionStatement( |
| new Rethrow()..fileOffset = throwToken.charOffset)); |
| } else { |
| push(buildCompileTimeErrorStatement( |
| "'rethrow' can only be used in catch clauses.", |
| throwToken.charOffset)); |
| } |
| } |
| |
| @override |
| void handleFinallyBlock(Token finallyKeyword) { |
| debugEvent("FinallyBlock"); |
| // Do nothing, handled by [endTryStatement]. |
| } |
| |
| @override |
| void endWhileStatement(Token whileKeyword, Token endToken) { |
| debugEvent("WhileStatement"); |
| Statement body = popStatement(); |
| Expression condition = popForValue(); |
| JumpTarget continueTarget = exitContinueTarget(); |
| JumpTarget breakTarget = exitBreakTarget(); |
| if (continueTarget.hasUsers) { |
| body = new LabeledStatement(body); |
| continueTarget.resolveContinues(body); |
| } |
| Statement result = new WhileStatement(condition, body); |
| if (breakTarget.hasUsers) { |
| result = new LabeledStatement(result); |
| breakTarget.resolveBreaks(result); |
| } |
| exitLoopOrSwitch(result); |
| } |
| |
| @override |
| void handleEmptyStatement(Token token) { |
| debugEvent("EmptyStatement"); |
| push(new EmptyStatement()); |
| } |
| |
| @override |
| void handleAssertStatement(Token assertKeyword, Token leftParenthesis, |
| Token commaToken, Token rightParenthesis, Token semicolonToken) { |
| debugEvent("AssertStatement"); |
| Expression message = popForValueIfNotNull(commaToken); |
| Expression condition = popForValue(); |
| push(new AssertStatement(condition, message)); |
| } |
| |
| @override |
| void endYieldStatement(Token yieldToken, Token starToken, Token endToken) { |
| debugEvent("YieldStatement"); |
| push(new YieldStatement(popForValue(), isYieldStar: starToken != null) |
| ..fileOffset = yieldToken.charOffset); |
| } |
| |
| @override |
| void beginSwitchBlock(Token token) { |
| debugEvent("beginSwitchBlock"); |
| enterLocalScope(); |
| enterSwitchScope(); |
| enterBreakTarget(token.charOffset); |
| } |
| |
| @override |
| void beginSwitchCase(int labelCount, int expressionCount, Token firstToken) { |
| debugEvent("beginSwitchCase"); |
| List labelsAndExpressions = popList(labelCount + expressionCount); |
| List<Label> labels = <Label>[]; |
| List<Expression> expressions = <Expression>[]; |
| if (labelsAndExpressions != null) { |
| for (var labelOrExpression in labelsAndExpressions) { |
| if (labelOrExpression is Label) { |
| labels.add(labelOrExpression); |
| } else { |
| expressions.add(toValue(labelOrExpression)); |
| } |
| } |
| } |
| assert(scope == switchScope); |
| for (Label label in labels) { |
| if (scope.hasLocalLabel(label.name)) { |
| // TODO(ahe): Should validate this is a goto target and not duplicated. |
| scope.claimLabel(label.name); |
| } else { |
| scope.declareLabel(label.name, createGotoTarget(firstToken.charOffset)); |
| } |
| } |
| push(expressions); |
| push(labels); |
| enterLocalScope(); |
| } |
| |
| @override |
| void handleSwitchCase( |
| int labelCount, |
| int expressionCount, |
| Token defaultKeyword, |
| int statementCount, |
| Token firstToken, |
| Token endToken) { |
| debugEvent("SwitchCase"); |
| Block block = popBlock(statementCount, firstToken.charOffset); |
| exitLocalScope(); |
| List<Label> labels = pop(); |
| List<Expression> expressions = pop(); |
| List<int> expressionOffsets = <int>[]; |
| for (Expression expression in expressions) { |
| expressionOffsets.add(expression.fileOffset); |
| } |
| push(new SwitchCase(expressions, expressionOffsets, block, |
| isDefault: defaultKeyword != null) |
| ..fileOffset = firstToken.charOffset); |
| push(labels); |
| } |
| |
| @override |
| void endSwitchStatement(Token switchKeyword, Token endToken) { |
| debugEvent("SwitchStatement"); |
| // Do nothing. Handled by [endSwitchBlock]. |
| } |
| |
| @override |
| void endSwitchBlock(int caseCount, Token beginToken, Token endToken) { |
| debugEvent("SwitchBlock"); |
| List<SwitchCase> cases = |
| new List<SwitchCase>.filled(caseCount, null, growable: true); |
| for (int i = caseCount - 1; i >= 0; i--) { |
| List<Label> labels = pop(); |
| SwitchCase current = cases[i] = pop(); |
| for (Label label in labels) { |
| JumpTarget target = switchScope.lookupLabel(label.name); |
| if (target != null) { |
| target.resolveGotos(current); |
| } |
| } |
| // TODO(ahe): Validate that there's only one default and it's last. |
| } |
| JumpTarget target = exitBreakTarget(); |
| exitSwitchScope(); |
| exitLocalScope(); |
| Expression expression = popForValue(); |
| Statement result = new SwitchStatement(expression, cases); |
| if (target.hasUsers) { |
| result = new LabeledStatement(result); |
| target.resolveBreaks(result); |
| } |
| exitLoopOrSwitch(result); |
| } |
| |
| @override |
| void handleCaseMatch(Token caseKeyword, Token colon) { |
| debugEvent("CaseMatch"); |
| // Do nothing. Handled by [handleSwitchCase]. |
| } |
| |
| @override |
| void handleBreakStatement( |
| bool hasTarget, Token breakKeyword, Token endToken) { |
| debugEvent("BreakStatement"); |
| var target = breakTarget; |
| String name; |
| if (hasTarget) { |
| Identifier identifier = pop(); |
| name = identifier.name; |
| target = scope.lookupLabel(identifier.name); |
| } |
| if (target == null && name == null) { |
| push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement( |
| "No target of break.", breakKeyword.charOffset)); |
| } else if (target == null || |
| target is! JumpTarget || |
| !target.isBreakTarget) { |
| push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement( |
| "Can't break to '$name'.", breakKeyword.next.charOffset)); |
| } else if (target.functionNestingLevel != functionNestingLevel) { |
| push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement( |
| "Can't break to '$name' in a different function.", |
| breakKeyword.next.charOffset)); |
| } else { |
| BreakStatement statement = new BreakStatement(null) |
| ..fileOffset = breakKeyword.charOffset; |
| target.addBreak(statement); |
| push(statement); |
| } |
| } |
| |
| @override |
| void handleContinueStatement( |
| bool hasTarget, Token continueKeyword, Token endToken) { |
| debugEvent("ContinueStatement"); |
| var target = continueTarget; |
| String name; |
| if (hasTarget) { |
| Identifier identifier = pop(); |
| name = identifier.name; |
| target = scope.lookupLabel(identifier.name); |
| if (target != null && target is! JumpTarget) { |
| push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement( |
| "Target of continue must be a label.", continueKeyword.charOffset)); |
| return; |
| } |
| if (target == null) { |
| if (switchScope == null) { |
| push(buildCompileTimeErrorStatement( |
| "Can't find label '$name'.", continueKeyword.next.charOffset)); |
| return; |
| } |
| switchScope.forwardDeclareLabel( |
| identifier.name, target = createGotoTarget(identifier.fileOffset)); |
| } |
| if (target.isGotoTarget && |
| target.functionNestingLevel == functionNestingLevel) { |
| ContinueSwitchStatement statement = new ContinueSwitchStatement(null); |
| target.addGoto(statement); |
| push(statement); |
| return; |
| } |
| } |
| if (target == null) { |
| push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement( |
| "No target of continue.", continueKeyword.charOffset)); |
| } else if (!target.isContinueTarget) { |
| push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement( |
| "Can't continue at '$name'.", continueKeyword.next.charOffset)); |
| } else if (target.functionNestingLevel != functionNestingLevel) { |
| push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement( |
| "Can't continue at '$name' in a different function.", |
| continueKeyword.next.charOffset)); |
| } else { |
| BreakStatement statement = new BreakStatement(null) |
| ..fileOffset = continueKeyword.charOffset; |
| target.addContinue(statement); |
| push(statement); |
| } |
| } |
| |
| @override |
| void endTypeVariable(Token token, Token extendsOrSuper) { |
| debugEvent("TypeVariable"); |
| // TODO(ahe): Do not discard these when enabling generic method syntax. |
| pop(); // Bound. |
| pop(); // Name. |
| pop(); // Metadata. |
| } |
| |
| @override |
| void endTypeVariables(int count, Token beginToken, Token endToken) { |
| debugEvent("TypeVariables"); |
| // TODO(ahe): Implement this when enabling generic method syntax. |
| push(NullValue.TypeVariables); |
| } |
| |
| @override |
| void handleModifier(Token token) { |
| debugEvent("Modifier"); |
| // TODO(ahe): Copied from outline_builder.dart. |
| push(new Modifier.fromString(token.stringValue)); |
| } |
| |
| @override |
| void handleModifiers(int count) { |
| debugEvent("Modifiers"); |
| // TODO(ahe): Copied from outline_builder.dart. |
| push(popList(count) ?? NullValue.Modifiers); |
| } |
| |
| @override |
| void handleRecoverableError(Token token, FastaMessage message) { |
| bool silent = hasParserError; |
| super.handleRecoverableError(token, message); |
| addCompileTimeError(message.charOffset, message.message, silent: silent); |
| } |
| |
| @override |
| Token handleUnrecoverableError(Token token, FastaMessage message) { |
| if (isDartLibrary && message.code == codeExpectedFunctionBody) { |
| Token recover = skipNativeClause(token); |
| if (recover != null) return recover; |
| } else if (message.code == codeExpectedButGot) { |
| String expected = message.arguments["string"]; |
| const List<String> trailing = const <String>[")", "}", ";", ","]; |
| if (trailing.contains(token.stringValue) && trailing.contains(expected)) { |
| handleRecoverableError(token, message); |
| return newSyntheticToken(token); |
| } |
| } |
| return super.handleUnrecoverableError(token, message); |
| } |
| |
| @override |
| Expression buildCompileTimeError(error, [int charOffset = -1]) { |
| addCompileTimeError(charOffset, error); |
| String message = formatUnexpected(uri, charOffset, error); |
| Builder constructor = library.loader.getCompileTimeError(); |
| return new Throw(buildStaticInvocation(constructor.target, |
| new Arguments(<Expression>[new StringLiteral(message)]))); |
| } |
| |
| Expression buildAbstractClassInstantiationError(String className, |
| [int charOffset = -1]) { |
| warning("The class '$className' is abstract and can't be instantiated.", |
| charOffset); |
| Builder constructor = library.loader.getAbstractClassInstantiationError(); |
| return new Throw(buildStaticInvocation(constructor.target, |
| new Arguments(<Expression>[new StringLiteral(className)]))); |
| } |
| |
| Statement buildCompileTimeErrorStatement(error, [int charOffset = -1]) { |
| return new ExpressionStatement(buildCompileTimeError(error, charOffset)); |
| } |
| |
| @override |
| Initializer buildInvalidIntializer(Expression expression, |
| [int charOffset = -1]) { |
| needsImplicitSuperInitializer = false; |
| return new LocalInitializer(new VariableDeclaration.forValue(expression)) |
| ..fileOffset = charOffset; |
| } |
| |
| @override |
| Initializer buildSuperInitializer( |
| Constructor constructor, Arguments arguments, |
| [int charOffset = -1]) { |
| needsImplicitSuperInitializer = false; |
| return new SuperInitializer(constructor, arguments) |
| ..fileOffset = charOffset; |
| } |
| |
| @override |
| Initializer buildRedirectingInitializer( |
| Constructor constructor, Arguments arguments, |
| [int charOffset = -1]) { |
| needsImplicitSuperInitializer = false; |
| return new RedirectingInitializer(constructor, arguments) |
| ..fileOffset = charOffset; |
| } |
| |
| @override |
| Expression buildProblemExpression(ProblemBuilder builder, int charOffset) { |
| return buildCompileTimeError(builder.message, charOffset); |
| } |
| |
| @override |
| void handleOperator(Token token) { |
| debugEvent("Operator"); |
| push(new Operator(token.stringValue)..fileOffset = token.charOffset); |
| } |
| |
| @override |
| void handleSymbolVoid(Token token) { |
| debugEvent("SymbolVoid"); |
| push(new Identifier(token.stringValue, token.charOffset)); |
| } |
| |
| dynamic addCompileTimeError(int charOffset, String message, |
| {bool silent: false}) { |
| // TODO(ahe): If constantExpressionRequired is set, set it to false to |
| // avoid a long list of errors. |
| return library.addCompileTimeError(charOffset, message, fileUri: uri); |
| } |
| |
| @override |
| void handleInvalidFunctionBody(Token token) { |
| if (member.isNative) { |
| push(NullValue.FunctionBody); |
| } else { |
| push(new Block(<Statement>[new InvalidStatement()])); |
| } |
| } |
| |
| @override |
| void warning(String message, [int charOffset = -1]) { |
| if (constantExpressionRequired) { |
| addCompileTimeError(charOffset, message); |
| } else { |
| super.warning(message, charOffset); |
| } |
| } |
| |
| void warningNotError(String message, [int charOffset = -1]) { |
| super.warning(message, charOffset); |
| } |
| |
| Expression evaluateArgumentsBefore( |
| Arguments arguments, Expression expression) { |
| if (arguments == null) return expression; |
| List<Expression> expressions = |
| new List<Expression>.from(arguments.positional); |
| for (NamedExpression named in arguments.named) { |
| expressions.add(named.value); |
| } |
| for (Expression argument in expressions.reversed) { |
| expression = new Let( |
| new VariableDeclaration.forValue(argument, isFinal: true), |
| expression); |
| } |
| return expression; |
| } |
| |
| @override |
| void debugEvent(String name) { |
| // printEvent(name); |
| } |
| |
| @override |
| StaticGet makeStaticGet(Member readTarget, int offset) { |
| // TODO(paulberry): only record the dependencies mandated by the top level |
| // type inference spec. |
| if (fieldDependencies != null && readTarget is KernelField) { |
| var fieldNode = _typeInferrer.getFieldNodeForReadTarget(readTarget); |
| if (fieldNode != null) { |
| fieldDependencies.add(fieldNode); |
| } |
| } |
| return astFactory.staticGet(readTarget, offset); |
| } |
| } |
| |
| // TODO(ahe): Shouldn't need to be an expression. |
| class Identifier extends InvalidExpression { |
| final String name; |
| |
| Identifier(this.name, int charOffset) { |
| fileOffset = charOffset; |
| } |
| |
| Expression get initializer => null; |
| |
| String toString() => "identifier($name)"; |
| } |
| |
| // TODO(ahe): Shouldn't need to be an expression. |
| class Operator extends InvalidExpression { |
| final String name; |
| |
| Operator(this.name); |
| |
| String toString() => "operator($name)"; |
| } |
| |
| class InitializedIdentifier extends Identifier { |
| final Expression initializer; |
| |
| InitializedIdentifier(String name, this.initializer, int charOffset) |
| : super(name, charOffset); |
| |
| String toString() => "initialized-identifier($name, $initializer)"; |
| } |
| |
| // TODO(ahe): Shouldn't need to be an expression. |
| class Label extends InvalidExpression { |
| String name; |
| |
| Label(this.name); |
| |
| String toString() => "label($name)"; |
| } |
| |
| class CascadeReceiver extends Let { |
| Let nextCascade; |
| |
| CascadeReceiver(VariableDeclaration variable) |
| : super( |
| variable, |
| makeLet(new VariableDeclaration.forValue(new InvalidExpression()), |
| new VariableGet(variable))) { |
| nextCascade = body; |
| } |
| |
| void extend() { |
| assert(nextCascade.variable.initializer is! InvalidExpression); |
| Let newCascade = makeLet( |
| new VariableDeclaration.forValue(new InvalidExpression()), |
| nextCascade.body); |
| nextCascade.body = newCascade; |
| newCascade.parent = nextCascade; |
| nextCascade = newCascade; |
| } |
| |
| void finalize(Expression expression) { |
| assert(nextCascade.variable.initializer is InvalidExpression); |
| nextCascade.variable.initializer = expression; |
| expression.parent = nextCascade.variable; |
| } |
| } |
| |
| abstract class ContextAccessor extends FastaAccessor { |
| final BuilderHelper helper; |
| |
| final FastaAccessor accessor; |
| |
| final int offset; |
| |
| ContextAccessor(this.helper, this.offset, this.accessor); |
| |
| @override |
| Expression get builtBinary => internalError("Unsupported operation."); |
| |
| @override |
| void set builtBinary(Expression expression) { |
| internalError("Unsupported operation."); |
| } |
| |
| @override |
| Expression get builtGetter => internalError("Unsupported operation."); |
| |
| @override |
| void set builtGetter(Expression expression) { |
| internalError("Unsupported operation."); |
| } |
| |
| String get plainNameForRead => internalError("Unsupported operation."); |
| |
| Expression doInvocation(int charOffset, Arguments arguments) { |
| return internalError("Unhandled: ${runtimeType}", uri, charOffset); |
| } |
| |
| Expression buildSimpleRead(); |
| |
| Expression buildForEffect(); |
| |
| Expression buildAssignment(Expression value, {bool voidContext: false}) { |
| return makeInvalidWrite(value); |
| } |
| |
| Expression buildNullAwareAssignment(Expression value, DartType type, |
| {bool voidContext: false}) { |
| return makeInvalidWrite(value); |
| } |
| |
| Expression buildCompoundAssignment(Name binaryOperator, Expression value, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget}) { |
| return makeInvalidWrite(value); |
| } |
| |
| Expression buildPrefixIncrement(Name binaryOperator, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget}) { |
| return makeInvalidWrite(null); |
| } |
| |
| Expression buildPostfixIncrement(Name binaryOperator, |
| {int offset: TreeNode.noOffset, |
| bool voidContext: false, |
| Procedure interfaceTarget}) { |
| return makeInvalidWrite(null); |
| } |
| |
| makeInvalidRead() => internalError("not supported"); |
| |
| Expression makeInvalidWrite(Expression value) { |
| return helper.buildCompileTimeError( |
| "Can't be used as left-hand side of assignment.", offset); |
| } |
| } |
| |
| class DelayedAssignment extends ContextAccessor { |
| final Expression value; |
| |
| final String assignmentOperator; |
| |
| DelayedAssignment(BuilderHelper helper, int charOffset, |
| FastaAccessor accessor, this.value, this.assignmentOperator) |
| : super(helper, charOffset, accessor); |
| |
| Expression buildSimpleRead() { |
| return handleAssignment(false); |
| } |
| |
| Expression buildForEffect() { |
| return handleAssignment(true); |
| } |
| |
| Expression handleAssignment(bool voidContext) { |
| if (identical("=", assignmentOperator)) { |
| return accessor.buildAssignment(value, voidContext: voidContext); |
| } else if (identical("+=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(plusName, value, |
| offset: offset, voidContext: voidContext); |
| } else if (identical("-=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(minusName, value, |
| offset: offset, voidContext: voidContext); |
| } else if (identical("*=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(multiplyName, value, |
| offset: offset, voidContext: voidContext); |
| } else if (identical("%=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(percentName, value, |
| offset: offset, voidContext: voidContext); |
| } else if (identical("&=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(ampersandName, value, |
| offset: offset, voidContext: voidContext); |
| } else if (identical("/=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(divisionName, value, |
| offset: offset, voidContext: voidContext); |
| } else if (identical("<<=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(leftShiftName, value, |
| offset: offset, voidContext: voidContext); |
| } else if (identical(">>=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(rightShiftName, value, |
| offset: offset, voidContext: voidContext); |
| } else if (identical("??=", assignmentOperator)) { |
| return accessor.buildNullAwareAssignment(value, const DynamicType(), |
| voidContext: voidContext); |
| } else if (identical("^=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(caretName, value, |
| offset: offset, voidContext: voidContext); |
| } else if (identical("|=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(barName, value, |
| offset: offset, voidContext: voidContext); |
| } else if (identical("~/=", assignmentOperator)) { |
| return accessor.buildCompoundAssignment(mustacheName, value, |
| offset: offset, voidContext: voidContext); |
| } else { |
| return internalError("Unhandled: $assignmentOperator"); |
| } |
| } |
| |
| Initializer buildFieldInitializer( |
| Map<String, FieldInitializer> initializers) { |
| if (!identical("=", assignmentOperator) || |
| !accessor.isThisPropertyAccessor) { |
| return accessor.buildFieldInitializer(initializers); |
| } |
| String name = accessor.plainNameForRead; |
| FieldInitializer initializer = initializers[name]; |
| if (initializer != null && initializer.value == null) { |
| initializers.remove(name); |
| initializer.value = value..parent = initializer; |
| return initializer; |
| } |
| return accessor.buildFieldInitializer(initializers); |
| } |
| } |
| |
| class DelayedPostfixIncrement extends ContextAccessor { |
| final Name binaryOperator; |
| |
| final Procedure interfaceTarget; |
| |
| DelayedPostfixIncrement(BuilderHelper helper, int offset, |
| FastaAccessor accessor, this.binaryOperator, this.interfaceTarget) |
| : super(helper, offset, accessor); |
| |
| Expression buildSimpleRead() { |
| return accessor.buildPostfixIncrement(binaryOperator, |
| offset: offset, voidContext: false, interfaceTarget: interfaceTarget); |
| } |
| |
| Expression buildForEffect() { |
| return accessor.buildPostfixIncrement(binaryOperator, |
| offset: offset, voidContext: true, interfaceTarget: interfaceTarget); |
| } |
| } |
| |
| class JumpTarget extends Builder { |
| final List<Statement> users = <Statement>[]; |
| |
| final JumpTargetKind kind; |
| |
| final int functionNestingLevel; |
| |
| JumpTarget(this.kind, this.functionNestingLevel, MemberBuilder member, |
| int charOffset) |
| : super(member, charOffset, member.fileUri); |
| |
| bool get isBreakTarget => kind == JumpTargetKind.Break; |
| |
| bool get isContinueTarget => kind == JumpTargetKind.Continue; |
| |
| bool get isGotoTarget => kind == JumpTargetKind.Goto; |
| |
| bool get hasUsers => users.isNotEmpty; |
| |
| void addBreak(BreakStatement statement) { |
| assert(isBreakTarget); |
| users.add(statement); |
| } |
| |
| void addContinue(BreakStatement statement) { |
| assert(isContinueTarget); |
| users.add(statement); |
| } |
| |
| void addGoto(ContinueSwitchStatement statement) { |
| assert(isGotoTarget); |
| users.add(statement); |
| } |
| |
| void resolveBreaks(LabeledStatement target) { |
| assert(isBreakTarget); |
| for (BreakStatement user in users) { |
| user.target = target; |
| } |
| users.clear(); |
| } |
| |
| void resolveContinues(LabeledStatement target) { |
| assert(isContinueTarget); |
| for (BreakStatement user in users) { |
| user.target = target; |
| } |
| users.clear(); |
| } |
| |
| void resolveGotos(SwitchCase target) { |
| assert(isGotoTarget); |
| for (ContinueSwitchStatement user in users) { |
| user.target = target; |
| } |
| users.clear(); |
| } |
| |
| @override |
| String get fullNameForErrors => "<jump-target>"; |
| } |
| |
| class LabelTarget extends Builder implements JumpTarget { |
| final JumpTarget breakTarget; |
| |
| final JumpTarget continueTarget; |
| |
| final int functionNestingLevel; |
| |
| LabelTarget(MemberBuilder member, this.functionNestingLevel, int charOffset) |
| : breakTarget = new JumpTarget( |
| JumpTargetKind.Break, functionNestingLevel, member, charOffset), |
| continueTarget = new JumpTarget( |
| JumpTargetKind.Continue, functionNestingLevel, member, charOffset), |
| super(member, charOffset, member.fileUri); |
| |
| bool get hasUsers => breakTarget.hasUsers || continueTarget.hasUsers; |
| |
| List<Statement> get users => internalError("Unsupported operation."); |
| |
| JumpTargetKind get kind => internalError("Unsupported operation."); |
| |
| bool get isBreakTarget => true; |
| |
| bool get isContinueTarget => true; |
| |
| bool get isGotoTarget => false; |
| |
| void addBreak(BreakStatement statement) { |
| breakTarget.addBreak(statement); |
| } |
| |
| void addContinue(BreakStatement statement) { |
| continueTarget.addContinue(statement); |
| } |
| |
| void addGoto(ContinueSwitchStatement statement) { |
| internalError("Unsupported operation."); |
| } |
| |
| void resolveBreaks(LabeledStatement target) { |
| breakTarget.resolveBreaks(target); |
| } |
| |
| void resolveContinues(LabeledStatement target) { |
| continueTarget.resolveContinues(target); |
| } |
| |
| void resolveGotos(SwitchCase target) { |
| internalError("Unsupported operation."); |
| } |
| |
| @override |
| String get fullNameForErrors => "<label-target>"; |
| } |
| |
| class OptionalFormals { |
| final FormalParameterType kind; |
| |
| final List<VariableDeclaration> formals; |
| |
| OptionalFormals(this.kind, this.formals); |
| } |
| |
| class FormalParameters { |
| final List<VariableDeclaration> required; |
| final OptionalFormals optional; |
| final int charOffset; |
| |
| FormalParameters(this.required, this.optional, this.charOffset); |
| |
| FunctionNode addToFunction(FunctionNode function) { |
| function.requiredParameterCount = required.length; |
| function.positionalParameters.addAll(required); |
| if (optional != null) { |
| if (optional.kind.isPositional) { |
| function.positionalParameters.addAll(optional.formals); |
| } else { |
| function.namedParameters.addAll(optional.formals); |
| setParents(function.namedParameters, function); |
| } |
| } |
| setParents(function.positionalParameters, function); |
| return function; |
| } |
| |
| FunctionType toFunctionType(DartType returnType) { |
| returnType ??= const DynamicType(); |
| int requiredParameterCount = required.length; |
| List<DartType> positionalParameters = <DartType>[]; |
| List<NamedType> namedParameters = const <NamedType>[]; |
| for (VariableDeclaration parameter in required) { |
| positionalParameters.add(parameter.type); |
| } |
| if (optional != null) { |
| if (optional.kind.isPositional) { |
| for (VariableDeclaration parameter in optional.formals) { |
| positionalParameters.add(parameter.type); |
| } |
| } else { |
| namedParameters = <NamedType>[]; |
| for (VariableDeclaration parameter in optional.formals) { |
| namedParameters.add(new NamedType(parameter.name, parameter.type)); |
| } |
| namedParameters.sort(); |
| } |
| } |
| return new FunctionType(positionalParameters, returnType, |
| namedParameters: namedParameters, |
| requiredParameterCount: requiredParameterCount); |
| } |
| |
| Scope computeFormalParameterScope(Scope parent, Builder builder) { |
| if (required.length == 0 && optional == null) return parent; |
| Map<String, Builder> local = <String, Builder>{}; |
| for (VariableDeclaration parameter in required) { |
| local[parameter.name] = |
| new KernelVariableBuilder(parameter, builder, builder.fileUri); |
| } |
| if (optional != null) { |
| for (VariableDeclaration parameter in optional.formals) { |
| local[parameter.name] = |
| new KernelVariableBuilder(parameter, builder, builder.fileUri); |
| } |
| } |
| return new Scope(local, null, parent, isModifiable: false); |
| } |
| } |
| |
| /// Returns a block like this: |
| /// |
| /// { |
| /// statement; |
| /// body; |
| /// } |
| /// |
| /// If [body] is a [Block], it's returned with [statement] prepended to it. |
| Block combineStatements(Statement statement, Statement body) { |
| if (body is Block) { |
| body.statements.insert(0, statement); |
| statement.parent = body; |
| return body; |
| } else { |
| return new Block(<Statement>[statement, body]); |
| } |
| } |
| |
| String debugName(String className, String name, [String prefix]) { |
| String result = name.isEmpty ? className : "$className.$name"; |
| return prefix == null ? result : "$prefix.result"; |
| } |
| |
| String getNodeName(Object node) { |
| if (node is Identifier) { |
| return node.name; |
| } else if (node is TypeDeclarationBuilder) { |
| return node.name; |
| } else if (node is PrefixBuilder) { |
| return node.name; |
| } else if (node is ThisAccessor) { |
| return node.isSuper ? "super" : "this"; |
| } else if (node is FastaAccessor) { |
| return node.plainNameForRead; |
| } else { |
| return internalError("Unhandled: ${node.runtimeType}"); |
| } |
| } |