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Issue 2628043005:
Fasta kernel AST builder. (Closed)
| Index: pkg/fasta/lib/src/kernel/body_builder.dart |
| diff --git a/pkg/fasta/lib/src/kernel/body_builder.dart b/pkg/fasta/lib/src/kernel/body_builder.dart |
| new file mode 100644 |
| index 0000000000000000000000000000000000000000..4559ea3c52f21ffe84db1e91c52ddd77c72be3cf |
| --- /dev/null |
| +++ b/pkg/fasta/lib/src/kernel/body_builder.dart |
| @@ -0,0 +1,2511 @@ |
| +// 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 'package:dart_parser/src/parser.dart' show |
| + FormalParameterType, |
| + optional; |
| + |
| +import 'package:dart_parser/src/error_kind.dart' show |
| + ErrorKind; |
| + |
| +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 'package:dart_scanner/src/token.dart' show |
| + BeginGroupToken, |
| + ErrorToken, |
| + Token, |
| + isBinaryOperator, |
| + isMinusOperator; |
| + |
| +import '../errors.dart' show |
| + InputError, |
| + internalError; |
| + |
| +import '../errors.dart' as errors show |
| + inputError; |
| + |
| +import '../source/scope_listener.dart' show |
| + JumpTargetKind, |
| + NullValue, |
| + ScopeListener; |
| + |
| +import '../builder/scope.dart' show |
| + AccessErrorBuilder, |
| + AmbiguousBuilder, |
| + Scope; |
| + |
| +import '../source/outline_builder.dart' show |
| + asyncMarkerFromTokens; |
| + |
| +import 'builder_accessors.dart'; |
| + |
| +import 'frontend_accessors.dart' show |
| + buildIsNull, |
| + makeBinary, |
| + makeLet; |
| + |
| +import 'builder_accessors.dart' as builder_accessors show |
| + throwNoSuchMethodError; |
| + |
| +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'; |
| + |
| +const bool showNits = false; |
| + |
| +final Name callName = new Name("call"); |
| + |
| +final Name plusName = new Name("+"); |
| + |
| +final Name minusName = new Name("-"); |
| + |
| +final Name multiplyName = new Name("*"); |
| + |
| +final Name divisionName = new Name("/"); |
| + |
| +final Name percentName = new Name("%"); |
| + |
| +final Name ampersandName = new Name("&"); |
| + |
| +final Name leftShiftName = new Name("<<"); |
| + |
| +final Name rightShiftName = new Name(">>"); |
| + |
| +final Name caretName = new Name("^"); |
| + |
| +final Name barName = new Name("|"); |
| + |
| +final Name mustacheName = new Name("~/"); |
| + |
| +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; |
| + |
| + Scope formalParameterScope; |
| + |
| + bool isFirstIdentifier = false; |
| + |
| + bool hasParserError = false; |
| + |
| + bool inInitializer = false; |
| + |
| + bool inCatchClause = false; |
| + |
| + int functionNestingLevel = 0; |
| + |
| + Statement compileTimeErrorInTry; |
| + |
| + Statement compileTimeErrorInLoopOrSwitch; |
| + |
| + Scope switchScope; |
| + |
| + CloneVisitor cloner; |
| + |
| + BodyBuilder(this.library, this.member, Scope scope, this.formalParameterScope, |
| + this.hierarchy, this.coreTypes, this.classBuilder, this.isInstanceMember) |
| + : enclosingScope = scope, |
| + super(scope); |
| + |
| + bool get inConstructor { |
| + return functionNestingLevel == 0 && member is KernelConstructorBuilder; |
| + } |
| + |
| + bool get isInstanceContext { |
| + return isInstanceMember || member is KernelConstructorBuilder; |
| + } |
| + |
| + void push(Object node) { |
| + isFirstIdentifier = false; |
| + inInitializer = false; |
| + super.push(node); |
| + } |
| + |
| + Expression popForValue() => toValue(pop()); |
| + |
| + Expression popForEffect() => toEffect(pop()); |
| + |
| + Expression toValue(Object node) { |
| + if (node is UnresolvedIdentifier) { |
| + return throwNoSuchMethodError(node.name.name, new Arguments.empty(), |
| + node.fileOffset, isGetter: true); |
| + } else if (node is BuilderAccessor) { |
| + return node.buildSimpleRead(); |
| + } else if (node is TypeVariableBuilder) { |
| + TypeParameterType type = node.buildTypesWithBuiltArguments(null); |
| + if (!isInstanceContext && type.parameter.parent is Class) { |
| + return buildCompileTimeError( |
| + "Type variables can only be used in instance methods."); |
| + } else { |
| + return new TypeLiteral(type); |
| + } |
| + } else if (node is TypeDeclarationBuilder) { |
| + return new TypeLiteral(node.buildTypesWithBuiltArguments(null)); |
| + } else if (node is KernelTypeBuilder) { |
| + return new TypeLiteral(node.build()); |
| + } else if (node is Expression) { |
| + return node; |
| + } else if (node is PrefixBuilder) { |
| + return buildCompileTimeError("A library can't be used as an expression."); |
| + } else { |
| + return internalError("Unhandled: ${node.runtimeType}"); |
| + } |
| + } |
| + |
| + Expression toEffect(Object node) { |
| + if (node is BuilderAccessor) 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) { |
| + 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)); |
| + copy.addAll(statement); |
| + } else if (copy != null) { |
| + copy.add(statement); |
| + } |
| + } |
| + return new Block(copy ?? statements); |
| + } |
| + |
| + 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 { |
| + return statement; |
| + } |
| + } |
| + |
| + void ignore(Unhandled value) { |
| + pop(); |
| + } |
| + |
| + void enterSwitchScope() { |
| + push(switchScope ?? NullValue.SwitchScope); |
| + switchScope = scope; |
| + } |
| + |
| + void exitSwitchScope() { |
| + switchScope = pop(); |
| + } |
| + |
| + Uri get uri => library.fileUri ?? library.uri; |
| + |
| + JumpTarget createJumpTarget(JumpTargetKind kind) => new JumpTarget(kind); |
| + |
| + 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. |
| + } |
| + |
| + void endMetadataStar(int count, bool forParameter) { |
| + debugEvent("MetadataStar"); |
| + push(NullValue.Metadata); |
| + } |
| + |
| + void endTopLevelFields(int count, Token beginToken, Token endToken) { |
| + debugEvent("TopLevelFields"); |
| + doFields(count); |
| + } |
| + |
| + void endFields(int count, Token beginToken, Token endToken) { |
| + debugEvent("Fields"); |
| + doFields(count); |
| + pop(); // Metadata. |
|
asgerf
2017/01/16 11:52:26
Why metadata here, but not for top-level fields?
ahe
2017/01/16 12:32:38
It's due to a difference between parseMember and p
|
| + } |
| + |
| + void doFields(int count) { |
| + List nodes = popList(count); |
| + pop(); // Type. |
| + pop(); // Modifiers. |
| + for (var node in nodes) { |
| + if (node is Identifier) { |
| + // Ignore, there's no initializer. |
| + } else if (node is VariableDeclaration) { |
| + FieldBuilder field; |
| + if (classBuilder != null) { |
| + field = classBuilder.members[node.name]; |
| + } else { |
| + field = library.members[node.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 = node.initializer; |
| + } else { |
| + internalError("Unhandled: ${node.runtimeType}"); |
| + } |
| + } |
| + } |
| + |
| + void endMember() { |
| + debugEvent("Member"); |
| + checkEmpty(); |
| + } |
| + |
| + void endFunctionBody(int count, Token beginToken, Token endToken) { |
| + debugEvent("FunctionBody"); |
| + if (beginToken == null) { |
| + assert(count == 0); |
| + push(NullValue.Block); |
| + } else { |
| + Block block = popBlock(count); |
| + exitLocalScope(); |
| + push(block); |
| + } |
| + } |
| + |
| + void prepareInitializers() { |
| + scope = formalParameterScope; |
| + assert(fieldInitializers.isEmpty); |
| + final member = this.member; |
| + if (member is KernelConstructorBuilder) { |
| + Constructor constructor = member.constructor; |
| + classBuilder.members.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); |
| + } |
| + } |
| + } |
| + } |
| + } |
| + } |
| + |
| + void beginConstructorInitializer(Token token) { |
| + debugEvent("beginConstructorInitializer"); |
| + inInitializer = true; |
| + } |
| + |
| + void endConstructorInitializer(Token token) { |
| + debugEvent("endConstructorInitializer"); |
| + assert(!inInitializer); |
| + final member = this.member; |
| + var node = pop(); |
| + Initializer initializer; |
| + if (node is Initializer) { |
| + initializer = node; |
| + } else if (node is BuilderAccessor) { |
| + initializer = node.buildFieldInitializer(fieldInitializers); |
| + } else if (node is ConstructorInvocation) { |
| + initializer = new SuperInitializer(node.target, node.arguments); |
| + } else { |
| + if (node is !Throw) { |
| + node = wrapInvalid(node); |
| + } |
| + initializer = |
| + new LocalInitializer(new VariableDeclaration.forValue(node)); |
| + } |
| + if (member is KernelConstructorBuilder) { |
| + member.addInitializer(initializer); |
| + } else { |
| + inputError("Can't have initializers: ${member.name}", token.charOffset); |
| + } |
| + } |
| + |
| + void handleNoInitializers() { |
| + debugEvent("NoInitializers"); |
| + } |
| + |
| + void endInitializers(int count, Token beginToken, Token endToken) { |
| + debugEvent("Initializers"); |
| + } |
| + |
| + void finishFunction(FormalParameters formals, |
| + AsyncMarker asyncModifier, Statement body) { |
| + debugEvent("finishFunction"); |
| + KernelFunctionBuilder builder = member; |
| + if (builder is KernelConstructorBuilder) { |
| + if (asyncModifier != AsyncMarker.Sync) { |
| + // TODO(ahe): Change this to a null check. |
| + inputError("Can't be marked as ${asyncModifier}: ${builder.name}", |
| + body?.fileOffset); |
| + } |
| + } else if (builder is KernelProcedureBuilder) { |
| + builder.asyncModifier = asyncModifier; |
| + } else { |
| + internalError("Unhandled: ${builder.runtimeType}"); |
| + } |
| + 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; |
| + } |
| + } |
| + } |
| + |
| + void endExpressionStatement(Token token) { |
| + debugEvent("ExpressionStatement"); |
| + push(new ExpressionStatement(popForEffect())); |
| + } |
| + |
| + void endArguments(int count, Token beginToken, Token endToken) { |
| + debugEvent("Arguments"); |
| + List arguments = popList(count) ?? <Expression>[]; |
| + int firstNamedArgument = arguments.length; |
| + for (int i = 0; i < arguments.length; i++) { |
| + var node = arguments[i]; |
| + if (node is NamedExpression) { |
| + firstNamedArgument = i < firstNamedArgument ? i : firstNamedArgument; |
| + } else { |
| + arguments[i] = node = toValue(node); |
| + if (i > firstNamedArgument) { |
| + internalError("Expected named argument: $node"); |
| + } |
| + } |
| + } |
| + if (firstNamedArgument < arguments.length) { |
| + List<Expression> positional = new List<Expression>.from( |
| + arguments.getRange(0, firstNamedArgument)); |
| + List<NamedExpression> named = new List<NamedExpression>.from( |
| + arguments.getRange(firstNamedArgument,arguments.length)); |
| + push(new Arguments(positional, named: named)); |
| + } else { |
| + push(new Arguments(arguments)); |
| + } |
| + } |
| + |
| + void handleParenthesizedExpression(BeginGroupToken token) { |
| + debugEvent("ParenthesizedExpression"); |
| + push(popForValue()); |
| + } |
| + |
| + void endSend(Token token) { |
| + debugEvent("Send"); |
| + Arguments arguments = pop(); |
| + List 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, token.charOffset, name)); |
| + } else { |
| + push(new SendAccessor(this, token.charOffset, name, arguments)); |
| + } |
| + } else if (arguments == null) { |
| + push(receiver); |
| + } else { |
| + push(finishSend(receiver, arguments, token.charOffset)); |
| + } |
| + } |
| + |
| + finishSend(Object receiver, Arguments arguments, int charOffset) { |
| + if (receiver is BuilderAccessor) { |
| + return receiver.doInvocation(charOffset, arguments); |
| + } else if (receiver is UnresolvedIdentifier) { |
| + return throwNoSuchMethodError(receiver.name.name, arguments, |
| + receiver.fileOffset); |
| + } else { |
| + return buildMethodInvocation(toValue(receiver), callName, |
| + arguments, charOffset); |
| + } |
| + } |
| + |
| + 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)); |
| + } |
| + } |
| + |
| + void endCascade() { |
| + debugEvent("endCascade"); |
| + Expression expression = popForEffect(); |
| + CascadeReceiver cascadeReceiver = pop(); |
| + cascadeReceiver.finalize(expression); |
| + push(cascadeReceiver); |
| + } |
| + |
| + 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); |
| + 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)); |
| + } |
| + |
| + 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; |
| + } |
| + |
| + Expression throwNoSuchMethodError(String name, Arguments arguments, |
| + int charOffset, {bool isSuper: false, isGetter: false, isSetter: false}) { |
| + return builder_accessors.throwNoSuchMethodError(name, arguments, uri, |
| + charOffset, coreTypes, isSuper: isSuper, isGetter: isGetter, |
| + isSetter: isSetter); |
| + } |
| + |
| + Member lookupSuperMember(Name name, {bool isSetter: false}) { |
| + Class superclass = classBuilder.cls.superclass; |
| + return superclass == null |
| + ? null |
| + : hierarchy.getDispatchTarget(superclass, name, setter: isSetter); |
| + } |
| + |
| + 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; |
| + } |
| + |
| + void beginExpression(Token token) { |
| + debugEvent("beginExpression"); |
| + isFirstIdentifier = true; |
| + } |
| + |
| + Builder computeSetter(Builder builder, Scope scope, String name) { |
| + if (builder.isSetter) return builder; |
| + if (builder.isGetter) return scope.lookupSetter(name); |
| + return builder.isField ? (builder.isFinal ? null : builder) : null; |
| + } |
| + |
| + void handleIdentifier(Token token) { |
| + debugEvent("handleIdentifier"); |
| + String name = token.value; |
| + if (isFirstIdentifier) { |
| + 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; |
| + Builder builder = scope.lookup(name); |
| + push(builderToFirstExpression(builder, name, token.charOffset)); |
| + } else { |
| + push(new Identifier(name)..fileOffset = token.charOffset); |
| + } |
| + } |
| + |
| + builderToFirstExpression(Builder builder, String name, int charOffset, |
| + {bool isPrefix: false}) { |
| + if (builder == null || (!isInstanceContext && builder.isInstanceMember)) { |
| + if (!isPrefix && identical(name, "dynamic") && builder == null) { |
| + return new KernelInterfaceTypeBuilder(name, null); |
| + } |
| + Name n = new Name(name, library.library); |
| + if (!isPrefix && isInstanceContext) { |
| + assert(builder == null); |
| + return new ThisPropertyAccessor(this, charOffset, n, null, null); |
| + } else { |
| + return new UnresolvedIdentifier(n) |
| + ..fileOffset = charOffset; |
| + } |
| + } else if (builder.isTypeDeclaration) { |
| + return builder; |
| + } else if (builder.isLocal) { |
| + return new VariableAccessor(this, charOffset, builder.target); |
| + } else if (builder.isInstanceMember) { |
| + 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) { |
| + return builder; |
| + } else if (builder is MixedAccessor) { |
| + return new StaticAccessor(this, charOffset, builder.getter.target, |
| + builder.setter.target); |
| + } else { |
| + if (builder is AccessErrorBuilder) { |
| + AccessErrorBuilder error = builder; |
| + builder = error.builder; |
| + } |
| + if (builder.target == null) { |
| + return internalError("Unhandled: ${builder}"); |
| + } |
| + Member getter = builder.target.hasGetter ? builder.target : null; |
| + Member setter = builder.target.hasSetter ? builder.target : null; |
| + setter ??= computeSetter(builder, scope, name)?.target; |
| + return |
| + new StaticAccessor(this, charOffset, getter, setter); |
| + } |
| + } |
| + |
| + void handleQualified(Token period) { |
| + debugEvent("Qualified"); |
| + Identifier name = pop(); |
| + var receiver = pop(); |
| + push([receiver, name]); |
| + } |
| + |
| + void beginLiteralString(Token token) { |
| + debugEvent("beginLiteralString"); |
| + push(token); |
| + } |
| + |
| + void handleStringPart(Token token) { |
| + debugEvent("StringPart"); |
| + push(token); |
| + } |
| + |
| + void endLiteralString(int interpolationCount) { |
| + debugEvent("endLiteralString"); |
| + if (interpolationCount == 0) { |
| + Token token = pop(); |
| + push(new StringLiteral(unescapeString(token.value))); |
| + } else { |
| + List parts = popList(1 + interpolationCount * 2); |
| + Token first = parts.first; |
| + Token last = parts.last; |
| + Quote quote = analyzeQuote(first.value); |
| + List<Expression> expressions = <Expression>[]; |
| + expressions.add(new StringLiteral(unescapeFirstStringPart( |
| + first.value, quote))); |
| + for (int i = 1; i < parts.length - 1; i++) { |
| + var part = parts[i]; |
| + if (part is Token) { |
| + expressions.add(new StringLiteral(unescape(part.value, quote))); |
| + } else { |
| + expressions.add(toValue(part)); |
| + } |
| + } |
| + expressions.add( |
| + new StringLiteral(unescapeLastStringPart(last.value, quote))); |
| + push(new StringConcatenation(expressions)); |
| + } |
| + } |
| + |
| + 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)); |
| + } |
| + |
| + void handleLiteralInt(Token token) { |
| + debugEvent("LiteralInt"); |
| + push(new IntLiteral(int.parse(token.value))); |
| + } |
| + |
| + 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)); |
| + } |
| + } |
| + |
| + void endIfStatement(Token ifToken, Token elseToken) { |
| + Statement elsePart = popStatementIfNotNull(elseToken); |
| + Statement thenPart = popStatement(); |
| + Expression condition = popForValue(); |
| + push(new IfStatement(condition, thenPart, elsePart)); |
| + } |
| + |
| + void endInitializer(Token assignmentOperator) { |
| + debugEvent("Initializer"); |
| + assert(assignmentOperator.stringValue == "="); |
| + Expression initializer = popForValue(); |
| + Identifier identifier = pop(); |
| + push(new VariableDeclaration(identifier.name, initializer: initializer)); |
| + } |
| + |
| + void endInitializedIdentifier() { |
| + // TODO(ahe): Use [InitializedIdentifier] here? |
| + debugEvent("InitializedIdentifier"); |
| + TreeNode node = pop(); |
| + VariableDeclaration variable; |
| + if (node is VariableDeclaration) { |
| + variable = node; |
| + } else if (node is Identifier) { |
| + variable = new VariableDeclaration(node.name); |
| + } else { |
| + internalError("unhandled identifier: ${node.runtimeType}"); |
| + } |
| + push(variable); |
| + scope[variable.name] = new KernelVariableBuilder(variable); |
| + } |
| + |
| + void endVariablesDeclaration(int count, Token endToken) { |
| + debugEvent("VariablesDeclaration"); |
| + List<VariableDeclaration> variables = popList(count); |
| + DartType type = pop(); |
| + int modifiers = Modifier.validate(pop()); |
| + bool isConst = (modifiers & constMask) != 0; |
| + bool isFinal = (modifiers & finalMask) != 0; |
| + if (type != null || isConst || isFinal) { |
| + type ??= const DynamicType(); |
| + for (VariableDeclaration variable in variables) { |
| + variable |
| + ..type = type |
| + ..isConst = isConst |
| + ..isFinal = isFinal; |
| + } |
| + } |
| + if (variables.length != 1) { |
| + push(variables); |
| + } else { |
| + push(variables.single); |
| + } |
| + } |
| + |
| + void endBlock(int count, Token beginToken, Token endToken) { |
| + debugEvent("Block"); |
| + Block block = popBlock(count); |
| + exitLocalScope(); |
| + push(block); |
| + } |
| + |
| + void handleAssignmentExpression(Token token) { |
| + debugEvent("AssignmentExpression"); |
| + Expression value = popForValue(); |
| + var accessor = pop(); |
| + if (accessor is TypeDeclarationBuilder) { |
| + push(wrapInvalid( |
| + new TypeLiteral(accessor.buildTypesWithBuiltArguments(null)))); |
| + } else if (accessor is! BuilderAccessor) { |
| + push(buildCompileTimeError("Can't assign to this.", token.charOffset)); |
| + } else { |
| + push(new DelayedAssignment(this, token.charOffset, accessor, value, |
| + token.stringValue)); |
| + } |
| + } |
| + |
| + void enterLoop() { |
| + if (peek() is LabelTarget) { |
| + LabelTarget target = peek(); |
| + enterBreakTarget(target.breakTarget); |
| + enterContinueTarget(target.continueTarget); |
| + } else{ |
| + enterBreakTarget(); |
| + enterContinueTarget(); |
| + } |
| + } |
| + |
| + void exitLoopOrSwitch(Statement statement) { |
| + if (compileTimeErrorInLoopOrSwitch != null) { |
| + push(compileTimeErrorInLoopOrSwitch); |
| + compileTimeErrorInLoopOrSwitch = null; |
| + } else { |
| + push(statement); |
| + } |
| + } |
| + |
| + void endForStatement( |
| + int updateExpressionCount, Token beginToken, 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>[]; |
| + var variableOrExpression = pop(); |
| + Statement begin; |
| + if (variableOrExpression is BuilderAccessor) { |
| + variableOrExpression = variableOrExpression.buildForEffect(); |
| + } |
| + if (variableOrExpression is VariableDeclaration) { |
| + variables.add(variableOrExpression); |
| + } else if (variableOrExpression is List) { |
| + variables.addAll(variableOrExpression); |
| + } 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); |
| + } |
| + |
| + void endAwaitExpression(Token beginToken, Token endToken) { |
| + debugEvent("AwaitExpression"); |
| + push(new AwaitExpression(popForValue())); |
| + } |
| + |
| + void handleAsyncModifier(Token asyncToken, Token starToken) { |
| + debugEvent("AsyncModifier"); |
| + push(asyncMarkerFromTokens(asyncToken, starToken)); |
| + } |
| + |
| + 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(); |
| + warning("Too many type arguments on List literal.", |
| + beginToken.charOffset); |
| + } |
| + } |
| + push(new ListLiteral(expressions, typeArgument: typeArgument, |
| + isConst: constKeyword != null)); |
| + } |
| + |
| + void handleLiteralBool(Token token) { |
| + debugEvent("LiteralBool"); |
| + bool value = optional("true", token); |
| + assert(value || optional("false", token)); |
| + push(new BoolLiteral(value)); |
| + } |
| + |
| + void handleLiteralDouble(Token token) { |
| + debugEvent("LiteralDouble"); |
| + push(new DoubleLiteral(double.parse(token.value))); |
| + } |
| + |
| + void handleLiteralNull(Token token) { |
| + debugEvent("LiteralNull"); |
| + push(new NullLiteral()); |
| + } |
| + |
| + 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(); |
| + warning("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)); |
| + } |
| + |
| + void endLiteralMapEntry(Token colon, Token endToken) { |
| + debugEvent("LiteralMapEntry"); |
| + Expression value = popForValue(); |
| + Expression key = popForValue(); |
| + push(new MapEntry(key, value)); |
| + } |
| + |
| + void beginLiteralSymbol(Token token) { |
| + isFirstIdentifier = false; |
| + } |
| + |
| + String symbolPartToString(name) { |
| + if (name is Identifier) { |
| + return name.name; |
| + } else if (name is Operator) { |
| + return name.name; |
| + } else { |
| + return internalError("Unhandled: ${name.runtimeType}"); |
| + } |
| + } |
| + |
| + void endLiteralSymbol(Token hashToken, int identifierCount) { |
| + debugEvent("LiteralSymbol"); |
| + String value; |
| + if (identifierCount == 1) { |
| + value = symbolPartToString(popForValue()); |
| + } else { |
| + List parts = popList(identifierCount); |
| + value = symbolPartToString(parts.first); |
| + for (int i = 1; i < parts.length; i++) { |
| + value += ".${symbolPartToString(parts[i])}"; |
| + } |
| + } |
| + push(new SymbolLiteral(value)); |
| + } |
| + |
| + DartType toKernelType(String name, List<DartType> arguments) { |
| + if (identical(name, "void")) return const VoidType(); |
| + if (identical(name, "dynamic")) return const DynamicType(); |
| + Builder builder = scope.lookup(name); |
| + if (builder is TypeDeclarationBuilder) { |
| + return builder.buildTypesWithBuiltArguments(arguments); |
| + } |
| + if (builder == null) { |
| + print("$uri: Type not found: $name"); |
| + } else { |
| + print("$uri: Not a type: $name"); |
| + } |
| + // TODO(ahe): Create an error somehow. |
| + return const DynamicType(); |
| + } |
| + |
| + void endType(Token beginToken, Token endToken) { |
| + // TODO(ahe): The scope is wrong for return types of generic functions. |
| + debugEvent("Type"); |
| + List<DartType> arguments = pop(); |
| + var name = pop(); |
| + if (name is List) { |
| + if (name.length != 2) { |
| + return internalError("Unexpected: $name.length"); |
| + } |
| + var prefix = name[0]; |
| + if (prefix is Identifier) { |
| + prefix = prefix.name; |
| + } |
| + var suffix = name[1]; |
| + if (suffix is Identifier) { |
| + suffix = suffix.name; |
| + } |
| + Builder builder; |
| + if (prefix is Builder) { |
| + builder = prefix; |
| + } else { |
| + builder = scope.lookup(prefix); |
| + } |
| + if (builder is PrefixBuilder) { |
| + name = builder.exports[suffix]; |
| + } else { |
| + return inputError( |
| + "Can't be used as a type: '${debugName(prefix, suffix)}'.", |
| + beginToken.charOffset); |
| + } |
| + } |
| + if (name is Identifier) { |
| + name = name.name; |
| + } |
| + if (name is BuilderAccessor) { |
| + warning("'${beginToken.value}' isn't a type.", beginToken.charOffset); |
| + push(const DynamicType()); |
| + } else if (name is UnresolvedIdentifier) { |
| + warning("'${name.name}' isn't a type.", beginToken.charOffset); |
| + push(const DynamicType()); |
| + } else if (name is TypeVariableBuilder) { |
| + push(name.buildTypesWithBuiltArguments(arguments)); |
| + } else if (name is TypeDeclarationBuilder) { |
| + push(name.buildTypesWithBuiltArguments(arguments)); |
| + } else if (name is TypeBuilder) { |
| + push(name.build()); |
| + } else { |
| + push(toKernelType(name, arguments)); |
| + } |
| + 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()); |
| + } |
| + } |
| + } |
| + |
| + void handleVoidKeyword(Token token) { |
| + debugEvent("VoidKeyword"); |
| + push(const VoidType()); |
| + } |
| + |
| + void handleAsOperator(Token operator, Token endToken) { |
| + debugEvent("AsOperator"); |
| + DartType type = pop(); |
| + Expression expression = popForValue(); |
| + push(new AsExpression(expression, type)); |
| + } |
| + |
| + void handleIsOperator(Token operator, Token not, Token endToken) { |
| + debugEvent("IsOperator"); |
| + DartType type = pop(); |
| + Expression expression = popForValue(); |
| + expression = new IsExpression(expression, type); |
| + if (not != null) { |
| + expression = new Not(expression); |
| + } |
| + push(expression); |
| + } |
| + |
| + 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())); |
| + } |
| + |
| + void endThrowExpression(Token throwToken, Token endToken) { |
| + debugEvent("ThrowExpression"); |
| + Expression expression = popForValue(); |
| + push(new Throw(expression)); |
| + } |
| + |
| + void endFormalParameter(Token thisKeyword) { |
| + debugEvent("FormalParameter"); |
| + if (thisKeyword != null) { |
| + if (!inConstructor) { |
| + return inputError("'this' parameters can only be used on constructors.", |
| + thisKeyword.charOffset); |
| + } |
| + } |
| + Identifier name = pop(); |
| + DartType type = pop(); |
| + pop(); // Modifiers. |
| + ignore(Unhandled.Metadata); |
| + VariableDeclaration variable; |
| + if (!inCatchClause && functionNestingLevel == 0) { |
| + var builder = formalParameterScope.lookup(name.name); |
| + if (builder == null) { |
| + return inputError("'${name.name}' isn't a field in this class.", |
| + name.fileOffset); |
| + } |
| + if (thisKeyword == null) { |
| + variable = builder.build(); |
| + variable.initializer = name.initializer; |
| + } else if (builder.isField && builder.parent == classBuilder) { |
| + FieldBuilder field = builder; |
| + if (type != null) { |
| + nit("Ignoring type on 'this' parameter '${name.name}'.", |
| + name.fileOffset); |
| + } |
| + type = field.target.type ?? const DynamicType(); |
| + variable = new VariableDeclaration(name.name, type: type, |
| + initializer: name.initializer); |
| + } else { |
| + return inputError("'${name.name}' isn't a field in this class.", |
| + name.fileOffset); |
| + } |
| + } else { |
| + variable = new VariableDeclaration(name.name, |
| + type: type ?? const DynamicType(), initializer: name.initializer); |
| + } |
| + push(variable); |
| + } |
| + |
| + void endOptionalFormalParameters( |
| + int count, Token beginToken, Token endToken) { |
| + debugEvent("OptionalFormalParameters"); |
| + FormalParameterType kind = optional("{", beginToken) |
| + ? FormalParameterType.NAMED : FormalParameterType.POSITIONAL; |
| + push(new OptionalFormals(kind, popList(count))); |
| + } |
| + |
| + void beginFunctionTypedFormalParameter(Token token) { |
| + debugEvent("beginFunctionTypedFormalParameter"); |
| + functionNestingLevel++; |
| + } |
| + |
| + void handleFunctionTypedFormalParameter(Token token) { |
| + 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--; |
| + } |
| + |
| + void handleValuedFormalParameter(Token equals, Token token) { |
| + debugEvent("ValuedFormalParameter"); |
| + Expression initializer = popForValue(); |
| + Identifier name = pop(); |
| + push(new InitializedIdentifier(name.name, initializer)); |
| + } |
| + |
| + 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); |
| + push(formals); |
| + if (inCatchClause || functionNestingLevel != 0) { |
| + enterLocalScope(formals.computeFormalParameterScope(scope)); |
| + } |
| + } |
| + |
| + void beginCatchClause(Token token) { |
| + debugEvent("beginCatchClause"); |
| + inCatchClause = true; |
| + } |
| + |
| + void endCatchClause(Token token) { |
| + debugEvent("CatchClause"); |
| + inCatchClause = false; |
| + } |
| + |
| + void handleCatchBlock(Token onKeyword, Token catchKeyword) { |
| + debugEvent("CatchBlock"); |
| + Block body = 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)); |
| + } |
| + |
| + 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; |
| + } |
| + } |
| + |
| + void handleNoExpression(Token token) { |
| + debugEvent("NoExpression"); |
| + push(NullValue.Expression); |
| + } |
| + |
| + void handleIndexedExpression( |
| + Token openCurlyBracket, Token closeCurlyBracket) { |
| + debugEvent("IndexedExpression"); |
| + Expression index = popForValue(); |
| + Expression receiver = popForValue(); |
| + push(IndexAccessor.make(this, openCurlyBracket.charOffset, receiver, index, |
| + null, null)); |
| + } |
| + |
| + void handleUnaryPrefixExpression(Token token) { |
| + debugEvent("UnaryPrefixExpression"); |
| + Expression expression = popForValue(); |
| + if (optional("!", token)) { |
| + push(new Not(expression)); |
| + } else { |
| + String operator = token.stringValue; |
| + if (optional("-", token)) { |
| + operator = "unary-"; |
| + } |
| + push(buildMethodInvocation(expression, 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.value}"); |
| + } |
| + |
| + void handleUnaryPrefixAssignmentExpression(Token token) { |
| + debugEvent("UnaryPrefixAssignmentExpression"); |
| + var accessor = pop(); |
| + if (accessor is BuilderAccessor) { |
| + push(accessor.buildPrefixIncrement(incrementOperator(token))); |
| + } else { |
| + push(wrapInvalid(toValue(accessor))); |
| + } |
| + } |
| + |
| + void handleUnaryPostfixAssignmentExpression(Token token) { |
| + debugEvent("UnaryPostfixAssignmentExpression"); |
| + var accessor = pop(); |
| + if (accessor is BuilderAccessor) { |
| + push(new DelayedPostfixIncrement(this, token.charOffset, accessor, |
| + incrementOperator(token), null)); |
| + } else { |
| + push(wrapInvalid(toValue(accessor))); |
| + } |
| + } |
| + |
| + 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(); |
| + var type = pop(); |
| + if (type is List) { |
| + var prefix = type[0]; |
| + identifier = type[1]; |
| + if (prefix is PrefixBuilder) { |
| + // TODO(ahe): Handle privacy in prefix.exports. |
| + type = builderToFirstExpression( |
| + prefix.exports[identifier.name], identifier.name, start.charOffset); |
| + identifier = null; |
| + } else if (prefix is ClassBuilder) { |
| + type = prefix; |
| + } else { |
| + type = new Identifier(start.value)..fileOffset = 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); |
| + } |
| + |
| + Expression buildStaticInvocation(Member target, Arguments arguments, |
| + {bool isConst: false}) { |
| + List<TypeParameter> typeParameters = target.function.typeParameters; |
| + if (target is Constructor) { |
| + typeParameters = target.enclosingClass.typeParameters; |
| + } |
| + if (!addDefaultArguments(target.function, arguments, typeParameters)) { |
| + return throwNoSuchMethodError(target.name.name, arguments, -1); |
| + } |
| + if (target is Constructor) { |
| + return new ConstructorInvocation(target, arguments) |
| + ..isConst = isConst; |
| + } else { |
| + return new StaticInvocation(target, arguments) |
| + ..isConst = isConst; |
| + } |
| + } |
| + |
| + bool addDefaultArguments(FunctionNode function, Arguments arguments, |
| + List<TypeParameter> typeParameters) { |
| + bool missingInitializers = false; |
| + |
| + Expression defaultArgumentFrom(Expression expression) { |
| + if (expression == null) { |
| + missingInitializers = true; |
| + return null; |
| + } |
| + cloner ??= new CloneVisitor(); |
| + return cloner.clone(expression); |
| + } |
| + |
| + if (arguments.positional.length < function.requiredParameterCount || |
| + arguments.positional.length > function.positionalParameters.length) { |
| + return false; |
| + } |
| + for (int i = arguments.positional.length; |
| + i < function.positionalParameters.length; |
| + i++) { |
| + var expression = |
| + defaultArgumentFrom(function.positionalParameters[i].initializer); |
| + expression?.parent = arguments; |
| + arguments.positional.add(expression); |
| + } |
| + 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 (names != null) { |
| + for (String name in names.keys) { |
| + VariableDeclaration parameter = names[name]; |
| + arguments.named.add( |
| + new NamedExpression( |
| + name, defaultArgumentFrom(parameter.initializer)) |
| + ..parent = arguments); |
| + } |
| + } |
| + if (typeParameters.length != arguments.types.length) { |
| + arguments.types.clear(); |
| + for (int i = 0; i < typeParameters.length; i++) { |
| + arguments.types.add(const DynamicType()); |
| + } |
| + } |
| + |
| + if (missingInitializers) { |
| + library.addArgumentsWithMissingDefaultValues(arguments, function); |
| + } |
| + return true; |
| + } |
| + |
| + void handleNewExpression(Token token) { |
| + debugEvent("NewExpression"); |
| + Arguments arguments = pop(); |
| + String name = pop(); |
| + List typeArguments = pop(); |
| + var type = pop(); |
| + |
| + if (typeArguments != null) { |
| + assert(arguments.types.isEmpty); |
| + arguments.types.addAll(typeArguments); |
| + } |
| + |
| + String errorName; |
| + if (type is ClassBuilder) { |
| + Builder b = type.findConstructorOrFactory(name); |
| + Member target; |
| + if (b == null) { |
| + // Not found. Reported below. |
| + } else if (b.isConstructor) { |
| + if (type.cls.isAbstract) { |
| + // TODO(ahe): Generate abstract instantiation error. |
| + } else { |
| + target = b.target; |
| + } |
| + } else if (b.isFactory) { |
| + target = getRedirectionTarget(b.target); |
| + if (target == null) { |
| + push(buildCompileTimeError( |
| + "Cyclic definition of factory '${name}'.", |
| + token.charOffset)); |
| + return; |
| + } |
| + } |
| + if (target is Constructor || |
| + (target is Procedure && target.kind == ProcedureKind.Factory)) { |
| + push(buildStaticInvocation( |
| + target, arguments, isConst: optional("const", token))); |
| + return; |
| + } else { |
| + errorName = debugName(type.cls.name, name); |
| + } |
| + } else { |
| + errorName = debugName(getNodeName(type), name); |
| + } |
| + errorName ??= name; |
| + push(throwNoSuchMethodError(errorName, arguments, token.charOffset)); |
| + } |
| + |
| + void handleConstExpression(Token token) { |
| + debugEvent("ConstExpression"); |
| + handleNewExpression(token); |
| + } |
| + |
| + void endTypeArguments(int count, Token beginToken, Token endToken) { |
| + debugEvent("TypeArguments"); |
| + push(popList(count)); |
| + } |
| + |
| + void handleThisExpression(Token token) { |
| + debugEvent("ThisExpression"); |
| + if (isFirstIdentifier && isInstanceContext) { |
| + push(new ThisAccessor(this, token.charOffset, inInitializer)); |
| + } else { |
| + push(new IncompleteError( |
| + this, token.charOffset, "Expected identifier, but got 'this'.")); |
| + } |
| + } |
| + |
| + void handleSuperExpression(Token token) { |
| + debugEvent("SuperExpression"); |
| + if (isFirstIdentifier && 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'.")); |
| + } |
| + } |
| + |
| + void handleNamedArgument(Token colon) { |
| + debugEvent("NamedArgument"); |
| + Expression value = popForValue(); |
| + Identifier identifier = pop(); |
| + push(new NamedExpression(identifier.name, value)); |
| + } |
| + |
| + void endFunctionName(Token token) { |
| + debugEvent("FunctionName"); |
| + Identifier name = pop(); |
| + VariableDeclaration variable = new VariableDeclaration( |
| + name.name, isFinal: true); |
| + push(new FunctionDeclaration(variable, |
| + new FunctionNode(new InvalidStatement()))); |
| + scope[variable.name] = new KernelVariableBuilder(variable); |
| + enterLocalScope(); |
| + } |
| + |
| + void beginFunction(Token token) { |
| + debugEvent("beginFunction"); |
| + functionNestingLevel++; |
| + } |
| + |
| + void beginUnnamedFunction(Token token) { |
| + debugEvent("beginUnnamedFunction"); |
| + functionNestingLevel++; |
| + } |
| + |
| + void endFunction(Token getOrSet, Token endToken) { |
| + debugEvent("Function"); |
| + Statement body = popStatement(); |
| + AsyncMarker asyncModifier = pop(); |
| + if (functionNestingLevel != 0) { |
| + exitLocalScope(); |
| + } |
| + FormalParameters formals = pop(); |
| + List typeParameters = pop(); |
| + push(formals.addToFunction(new FunctionNode(body, |
| + typeParameters: typeParameters, asyncMarker: asyncModifier))); |
| + functionNestingLevel--; |
| + } |
| + |
| + void endFunctionDeclaration(Token token) { |
| + debugEvent("FunctionDeclaration"); |
| + FunctionNode function = pop(); |
| + exitLocalScope(); |
| + FunctionDeclaration declaration = pop(); |
| + function.returnType = pop() ?? const DynamicType(); |
| + pop(); // Modifiers. |
| + declaration.function = function; |
| + function.parent = declaration; |
| + push(declaration); |
| + } |
| + |
| + void endUnnamedFunction(Token token) { |
| + debugEvent("UnnamedFunction"); |
| + Statement body = popStatement(); |
| + AsyncMarker asyncModifier = pop(); |
| + exitLocalScope(); |
| + FormalParameters formals = pop(); |
| + List typeParameters = pop(); |
| + FunctionNode function = formals.addToFunction(new FunctionNode(body, |
| + typeParameters: typeParameters, asyncMarker: asyncModifier)); |
| + push(new FunctionExpression(function)); |
| + functionNestingLevel--; |
| + } |
| + |
| + 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); |
| + } |
| + |
| + void endForIn( |
| + Token awaitToken, Token forToken, Token inKeyword, 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 BuilderAccessor) { |
| + /// 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 { |
| + throw inputError("Expected lvalue, but got ${lvalue}", |
| + forToken.next.next.charOffset); |
| + } |
| + Statement result = new ForInStatement(variable, expression, body, |
| + isAsync: awaitToken != null); |
| + if (breakTarget.hasUsers) { |
| + result = new LabeledStatement(result); |
| + breakTarget.resolveBreaks(result); |
| + } |
| + exitLoopOrSwitch(result); |
| + } |
| + |
| + void handleLabel(Token token) { |
| + debugEvent("Label"); |
| + Identifier identifier = pop(); |
| + push(new Label(identifier.name)); |
| + } |
| + |
| + void beginLabeledStatement(Token token, int labelCount) { |
| + debugEvent("beginLabeledStatement"); |
| + List<Label> labels = popList(labelCount); |
| + enterLocalScope(); |
| + LabelTarget target = new LabelTarget(); |
| + for (Label label in labels) { |
| + scope[label.name] = target; |
| + } |
| + push(target); |
| + } |
| + |
| + 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); |
| + } |
| + |
| + void endRethrowStatement(Token throwToken, Token endToken) { |
| + debugEvent("RethrowStatement"); |
| + push(new ExpressionStatement(new Rethrow())); |
| + } |
| + |
| + void handleFinallyBlock(Token finallyKeyword) { |
| + debugEvent("FinallyBlock"); |
| + // Do nothing, handled by [endTryStatement]. |
| + } |
| + |
| + 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); |
| + } |
| + |
| + void handleEmptyStatement(Token token) { |
| + debugEvent("EmptyStatement"); |
| + push(new EmptyStatement()); |
| + } |
| + |
| + void handleAssertStatement( |
| + Token assertKeyword, Token commaToken, Token semicolonToken) { |
| + debugEvent("AssertStatement"); |
| + Expression message = popIfNotNull(commaToken); |
| + Expression condition = popForValue(); |
| + push(new AssertStatement(condition, message)); |
| + } |
| + |
| + void endYieldStatement(Token yieldToken, Token starToken, Token endToken) { |
| + debugEvent("YieldStatement"); |
| + push(new YieldStatement(popForValue(), isYieldStar: starToken != null)); |
| + } |
| + |
| + void beginSwitchBlock(Token token) { |
| + debugEvent("beginSwitchBlock"); |
| + enterLocalScope(); |
| + enterSwitchScope(); |
| + enterBreakTarget(); |
| + } |
| + |
| + 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) { |
| + Builder existing = scope.local[label.name]; |
| + if (existing == null) { |
| + scope[label.name] = createGotoTarget(); |
| + } else { |
| + // TODO(ahe): Should validate this is a goto target and not duplicated. |
| + } |
| + } |
| + push(expressions); |
| + push(labels); |
| + enterLocalScope(); |
| + } |
| + |
| + void handleSwitchCase( |
| + int labelCount, |
| + int expressionCount, |
| + Token defaultKeyword, |
| + int statementCount, |
| + Token firstToken, |
| + Token endToken) { |
| + debugEvent("SwitchCase"); |
| + Block block = popBlock(statementCount); |
| + exitLocalScope(); |
| + List<Label> labels = pop(); |
| + List<Expression> expressions = pop(); |
| + push(new SwitchCase(expressions, block, isDefault: defaultKeyword != null)); |
| + push(labels); |
| + } |
| + |
| + void endSwitchStatement(Token switchKeyword, Token endToken) { |
| + debugEvent("SwitchStatement"); |
| + // Do nothing. Handled by [endSwitchBlock]. |
| + } |
| + |
| + 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.lookup(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); |
| + } |
| + |
| + void handleCaseMatch(Token caseKeyword, Token colon) { |
| + debugEvent("CaseMatch"); |
| + // Do nothing. Handled by [handleSwitchCase]. |
| + } |
| + |
| + 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.lookup(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 { |
| + BreakStatement statement = new BreakStatement(null); |
| + target.addBreak(statement); |
| + push(statement); |
| + } |
| + } |
| + |
| + 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.lookup(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 '$name'.", |
| + continueKeyword.next.charOffset)); |
| + return; |
| + } |
| + switchScope[identifier.name] = target = createGotoTarget(); |
| + } |
| + if (target.isGotoTarget) { |
| + ContinueSwitchStatement statement = new ContinueSwitchStatement(null); |
| + target.addGoto(statement); |
| + push(statement); |
| + return; |
| + } |
| + } |
| + if (target == null) { |
| + push(compileTimeErrorInLoopOrSwitch = |
| + buildCompileTimeErrorStatement("No target of continue.", |
| + continueKeyword.charOffset)); |
| + } else if (!target.isContinueTarget) { |
| + push(compileTimeErrorInLoopOrSwitch = |
| + buildCompileTimeErrorStatement("Can't continue at '$name'.", |
| + continueKeyword.next.charOffset)); |
| + } else { |
| + BreakStatement statement = new BreakStatement(null); |
| + target.addContinue(statement); |
| + push(statement); |
| + } |
| + } |
| + |
| + void endTypeVariable(Token token, Token extendsOrSuper) { |
| + logEvent("TypeVariable"); |
| + // TODO(ahe): Implement this when enabling generic method syntax. |
| + } |
| + |
| + void endTypeVariables(int count, Token beginToken, Token endToken) { |
| + logEvent("TypeVariables"); |
| + // TODO(ahe): Implement this when enabling generic method syntax. |
| + } |
| + |
| + void handleModifier(Token token) { |
| + debugEvent("Modifier"); |
| + // TODO(ahe): Copied from outline_builder.dart. |
| + push(new Modifier.fromString(token.stringValue)); |
| + } |
| + |
| + void handleModifiers(int count) { |
| + debugEvent("Modifiers"); |
| + // TODO(ahe): Copied from outline_builder.dart. |
| + push(popList(count) ?? NullValue.Modifiers); |
| + } |
| + |
| + void reportErrorHelper(Token token, ErrorKind kind, Map arguments) { |
| + super.reportErrorHelper(token, kind, arguments); |
| + if (!hasParserError) { |
| + print("$uri:${recoverableErrors.last}"); |
| + } |
| + hasParserError = true; |
| + } |
| + |
| + Token expectedExpression(Token token) { |
| + if (token is ErrorToken) { |
| + reportErrorToken(token); |
| + push(new Throw(new StringLiteral("${recoverableErrors.last}"))); |
| + do { |
| + token = token.next; |
| + } while (token is ErrorToken); |
| + return token; |
| + } else { |
| + push(new InvalidExpression()); |
| + return super.expectedExpression(token); |
| + } |
| + } |
| + |
| + Token expected(String string, Token token) { |
| + if (token is ErrorToken) { |
| + reportErrorToken(token); |
| + do { |
| + token = token.next; |
| + } while (token is ErrorToken); |
| + return token; |
| + } |
| + const List<String> trailing = const <String>[")", "}", ";", ","]; |
| + if (trailing.contains(token.stringValue) && trailing.contains(string)) { |
| + // We're just trying to get out an error. |
| + if (recoverableErrors.isNotEmpty) { |
| + reportError(token, ErrorKind.UNSPECIFIED, |
| + {"text": "Expected: '$string', but got '${token.value}'"}); |
| + } |
| + return token; |
| + } |
| + return super.expected(string, token); |
| + } |
| + |
| + void warning(error, [int charOffset = -1]) { |
| + String message = new InputError(uri, charOffset, error).format(); |
| + print(message); |
| + } |
| + |
| + void nit(error, [int charOffset = -1]) { |
| + if (!showNits) return; |
| + String message = new InputError(uri, charOffset, error).format(); |
| + print(message); |
| + } |
| + |
| + Expression buildCompileTimeError(error, [int charOffset = -1]) { |
| + String message = new InputError(uri, charOffset, error).format(); |
| + print(message); |
| + return new Throw(new StringLiteral(message)); |
| + } |
| + |
| + Statement buildCompileTimeErrorStatement(error, [int charOffset = -1]) { |
| + return new ExpressionStatement(buildCompileTimeError(error, charOffset)); |
| + } |
| + |
| + Initializer buildCompileTimeErrorIntializer(error, [int charOffset = -1]) { |
| + return new LocalInitializer( |
| + new VariableDeclaration.forValue( |
| + buildCompileTimeError(error, charOffset))); |
| + } |
| + |
| + |
| + Expression buildProblemExpression(Builder builder, String name) { |
| + if (builder is AmbiguousBuilder) { |
| + return buildCompileTimeError("Duplicated named: '$name'."); |
| + } else if (builder is AccessErrorBuilder) { |
| + return buildCompileTimeError("Access error: '$name'."); |
| + } else { |
| + return internalError("Unhandled: ${builder.runtimeType}"); |
| + } |
| + } |
| + |
| + void handleOperator(Token token) { |
| + debugEvent("Operator"); |
| + push(new Operator(token.stringValue)..fileOffset = token.charOffset); |
| + } |
| + |
| + dynamic inputError(String message, [int charOffset = -1]) { |
| + return errors.inputError(uri, charOffset, message); |
| + } |
| + |
| + void debugEvent(String name) { |
| + // printEvent(name); |
| + } |
| +} |
| + |
| +// TODO(ahe): Shouldn't need to be an expression. |
| +class UnresolvedIdentifier extends InvalidExpression { |
| + final Name name; |
| + |
| + UnresolvedIdentifier(this.name); |
| + |
| + String toString() => "unresolved-identifier($name)"; |
| +} |
| + |
| +// TODO(ahe): Shouldn't need to be an expression. |
| +class Identifier extends InvalidExpression { |
| + final String name; |
| + |
| + Identifier(this.name); |
| + |
| + 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) |
| + : super(name); |
| + |
| + 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 BuilderAccessor { |
| + final BuilderHelper helper; |
| + |
| + final int charOffset; |
| + |
| + final BuilderAccessor accessor; |
| + |
| + ContextAccessor(this.helper, this.charOffset, this.accessor); |
| + |
| + String get plainNameForRead => internalError("Unsupported operation."); |
| + |
| + Expression doInvocation(int charOffset, Arguments arguments) { |
| + print("$uri:$charOffset: Internal error: Unhandled: ${runtimeType}"); |
| + return internalError("Unhandled: ${runtimeType}"); |
| + } |
| + |
| + Expression buildSimpleRead(); |
| + |
| + Expression buildForEffect(); |
| + |
| + Expression buildAssignment(Expression value, {bool voidContext: false}) { |
| + return internalError("not supported"); |
| + } |
| + |
| + Expression buildNullAwareAssignment(Expression value, DartType type, |
| + {bool voidContext: false}) { |
| + return internalError("not supported"); |
| + } |
| + |
| + Expression buildCompoundAssignment(Name binaryOperator, Expression value, |
| + {bool voidContext: false, Procedure interfaceTarget}) { |
| + return internalError("not supported"); |
| + } |
| + |
| + Expression buildPrefixIncrement(Name binaryOperator, |
| + {bool voidContext: false, Procedure interfaceTarget}) { |
| + return internalError("not supported"); |
| + } |
| + |
| + Expression buildPostfixIncrement(Name binaryOperator, |
| + {bool voidContext: false, Procedure interfaceTarget}) { |
| + return internalError("not supported"); |
| + } |
| + |
| + makeInvalidRead() => internalError("not supported"); |
| + |
| + makeInvalidWrite(Expression value) => internalError("not supported"); |
| +} |
| + |
| +class DelayedAssignment extends ContextAccessor { |
| + final Expression value; |
| + |
| + final String assignmentOperator; |
| + |
| + DelayedAssignment(BuilderHelper helper, int charOffset, |
| + BuilderAccessor 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, voidContext: voidContext); |
| + } else if (identical("-=", assignmentOperator)) { |
| + return accessor.buildCompoundAssignment( |
| + minusName, value, voidContext: voidContext); |
| + } else if (identical("*=", assignmentOperator)) { |
| + return accessor.buildCompoundAssignment( |
| + multiplyName, value, voidContext: voidContext); |
| + } else if (identical("%=", assignmentOperator)) { |
| + return accessor.buildCompoundAssignment( |
| + percentName, value, voidContext: voidContext); |
| + } else if (identical("&=", assignmentOperator)) { |
| + return accessor.buildCompoundAssignment( |
| + ampersandName, value, voidContext: voidContext); |
| + } else if (identical("/=", assignmentOperator)) { |
| + return accessor.buildCompoundAssignment( |
| + divisionName, value, voidContext: voidContext); |
| + } else if (identical("<<=", assignmentOperator)) { |
| + return accessor.buildCompoundAssignment( |
| + leftShiftName, value, voidContext: voidContext); |
| + } else if (identical(">>=", assignmentOperator)) { |
| + return accessor.buildCompoundAssignment( |
| + rightShiftName, value, voidContext: voidContext); |
| + } else if (identical("??=", assignmentOperator)) { |
| + return accessor.buildNullAwareAssignment( |
| + value, const DynamicType(), voidContext: voidContext); |
| + } else if (identical("^=", assignmentOperator)) { |
| + return accessor.buildCompoundAssignment( |
| + caretName, value, voidContext: voidContext); |
| + } else if (identical("|=", assignmentOperator)) { |
| + return accessor.buildCompoundAssignment( |
| + barName, value, voidContext: voidContext); |
| + } else if (identical("~/=", assignmentOperator)) { |
| + return accessor.buildCompoundAssignment( |
| + mustacheName, value, 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 charOffset, |
| + BuilderAccessor accessor, this.binaryOperator, this.interfaceTarget) |
| + : super(helper, charOffset, accessor); |
| + |
| + Expression buildSimpleRead() { |
| + return accessor.buildPostfixIncrement(binaryOperator, voidContext: false, |
| + interfaceTarget: interfaceTarget); |
| + } |
| + |
| + Expression buildForEffect() { |
| + return accessor.buildPostfixIncrement(binaryOperator, voidContext: true, |
| + interfaceTarget: interfaceTarget); |
| + } |
| +} |
| + |
| +class JumpTarget extends Builder { |
| + final List<Statement> users = <Statement>[]; |
| + |
| + final JumpTargetKind kind; |
| + |
| + JumpTarget(this.kind); |
| + |
| + 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(); |
| + } |
| +} |
| + |
| +class LabelTarget extends Builder implements JumpTarget { |
| + final JumpTarget breakTarget = new JumpTarget(JumpTargetKind.Break); |
| + |
| + final JumpTarget continueTarget = new JumpTarget(JumpTargetKind.Continue); |
| + |
| + LabelTarget(); |
| + |
| + 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."); |
| + } |
| +} |
| + |
| +class OptionalFormals { |
| + final FormalParameterType kind; |
| + |
| + final List<VariableDeclaration> formals; |
| + |
| + OptionalFormals(this.kind, this.formals); |
| +} |
| + |
| +class FormalParameters { |
| + final List<VariableDeclaration> required; |
| + final OptionalFormals optional; |
| + |
| + FormalParameters(this.required, this.optional); |
| + |
| + 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) { |
| + 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); |
| + } |
| + if (optional != null) { |
| + for (VariableDeclaration parameter in optional.formals) { |
| + local[parameter.name] = new KernelVariableBuilder(parameter); |
| + } |
| + } |
| + return new Scope(local, 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 UnresolvedIdentifier) { |
| + return node.name.name; |
| + } else if (node is TypeDeclarationBuilder) { |
| + return node.name; |
| + } else if (node is PrefixBuilder) { |
| + return node.name; |
| + } else if (node is ThisPropertyAccessor) { |
| + return node.name.name; |
| + } else { |
| + return internalError("Unhandled: ${node.runtimeType}"); |
| + } |
| +} |
