X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/14957cd040308e3eeec43d26bae5d76da13fcd85..HEAD:/parser/SyntaxChecker.h

diff --git a/parser/SyntaxChecker.h b/parser/SyntaxChecker.h
index 2392244..a3306d2 100644
--- a/parser/SyntaxChecker.h
+++ b/parser/SyntaxChecker.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2010, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -27,9 +27,11 @@
 #define SyntaxChecker_h
 
 #include "Lexer.h"
-#include <yarr/YarrSyntaxChecker.h>
+#include "ParserFunctionInfo.h"
+#include "YarrSyntaxChecker.h"
 
 namespace JSC {
+    
 class SyntaxChecker {
 public:
     struct BinaryExprContext {
@@ -63,18 +65,27 @@ public:
         SyntaxChecker* m_context;
     };
     
-    SyntaxChecker(JSGlobalData* , Lexer*)
+    SyntaxChecker(VM* , void*)
     {
     }
 
     typedef SyntaxChecker FunctionBodyBuilder;
     enum { NoneExpr = 0,
-        ResolveEvalExpr, ResolveExpr, NumberExpr, StringExpr,
+        ResolveEvalExpr, ResolveExpr, IntegerExpr, DoubleExpr, StringExpr,
         ThisExpr, NullExpr, BoolExpr, RegExpExpr, ObjectLiteralExpr,
-        FunctionExpr, BracketExpr, DotExpr, CallExpr,
+        FunctionExpr, ClassExpr, SuperExpr, BracketExpr, DotExpr, CallExpr,
         NewExpr, PreExpr, PostExpr, UnaryExpr, BinaryExpr,
         ConditionalExpr, AssignmentExpr, TypeofExpr,
-        DeleteExpr, ArrayLiteralExpr };
+        DeleteExpr, ArrayLiteralExpr, BindingDestructuring,
+        ArrayDestructuring, ObjectDestructuring, SourceElementsResult,
+        FunctionBodyResult, SpreadExpr, ArgumentsResult,
+        PropertyListResult, ArgumentsListResult, ElementsListResult,
+        StatementResult, FormalParameterListResult, ClauseResult,
+        ClauseListResult, CommaExpr, DestructuringAssignment,
+        TemplateStringResult, TemplateStringListResult,
+        TemplateExpressionListResult, TemplateExpr,
+        TaggedTemplateExpr
+    };
     typedef int ExpressionType;
 
     typedef ExpressionType Expression;
@@ -87,8 +98,8 @@ public:
         {
         }
         ALWAYS_INLINE Property(const Identifier* ident, PropertyNode::Type ty)
-        : name(ident)
-        , type(ty)
+            : name(ident)
+            , type(ty)
         {
         }
         ALWAYS_INLINE Property(PropertyNode::Type ty)
@@ -103,116 +114,163 @@ public:
     typedef int PropertyList;
     typedef int ElementList;
     typedef int ArgumentsList;
+#if ENABLE(ES6_TEMPLATE_LITERAL_SYNTAX)
+    typedef int TemplateExpressionList;
+    typedef int TemplateString;
+    typedef int TemplateStringList;
+    typedef int TemplateLiteral;
+#endif
     typedef int FormalParameterList;
     typedef int FunctionBody;
+#if ENABLE(ES6_CLASS_SYNTAX)
+    typedef int ClassExpression;
+#endif
     typedef int Statement;
     typedef int ClauseList;
     typedef int Clause;
     typedef int ConstDeclList;
     typedef int BinaryOperand;
-    
+    typedef int DestructuringPattern;
+    typedef DestructuringPattern ArrayPattern;
+    typedef DestructuringPattern ObjectPattern;
+
     static const bool CreatesAST = false;
     static const bool NeedsFreeVariableInfo = false;
     static const bool CanUseFunctionCache = true;
-    static const unsigned DontBuildKeywords = Lexer::DontBuildKeywords;
-    static const unsigned DontBuildStrings = Lexer::DontBuildStrings;
+    static const unsigned DontBuildKeywords = LexexFlagsDontBuildKeywords;
+    static const unsigned DontBuildStrings = LexerFlagsDontBuildStrings;
 
-    int createSourceElements() { return 1; }
-    ExpressionType makeFunctionCallNode(int, int, int, int, int) { return CallExpr; }
-    void appendToComma(ExpressionType& base, ExpressionType right) { base = right; }
-    ExpressionType createCommaExpr(ExpressionType, ExpressionType right) { return right; }
-    ExpressionType makeAssignNode(ExpressionType, Operator, ExpressionType, bool, bool, int, int, int) { return AssignmentExpr; }
-    ExpressionType makePrefixNode(ExpressionType, Operator, int, int, int) { return PreExpr; }
-    ExpressionType makePostfixNode(ExpressionType, Operator, int, int, int) { return PostExpr; }
-    ExpressionType makeTypeOfNode(ExpressionType) { return TypeofExpr; }
-    ExpressionType makeDeleteNode(ExpressionType, int, int, int) { return DeleteExpr; }
-    ExpressionType makeNegateNode(ExpressionType) { return UnaryExpr; }
-    ExpressionType makeBitwiseNotNode(ExpressionType) { return UnaryExpr; }
-    ExpressionType createLogicalNot(ExpressionType) { return UnaryExpr; }
-    ExpressionType createUnaryPlus(ExpressionType) { return UnaryExpr; }
-    ExpressionType createVoid(ExpressionType) { return UnaryExpr; }
-    ExpressionType thisExpr() { return ThisExpr; }
-    ExpressionType createResolve(const Identifier*, int) { return ResolveExpr; }
-    ExpressionType createObjectLiteral() { return ObjectLiteralExpr; }
-    ExpressionType createObjectLiteral(int) { return ObjectLiteralExpr; }
-    ExpressionType createArray(int) { return ArrayLiteralExpr; }
-    ExpressionType createArray(int, int) { return ArrayLiteralExpr; }
-    ExpressionType createNumberExpr(double) { return NumberExpr; }
-    ExpressionType createString(const Identifier*) { return StringExpr; }
-    ExpressionType createBoolean(bool) { return BoolExpr; }
-    ExpressionType createNull() { return NullExpr; }
-    ExpressionType createBracketAccess(ExpressionType, ExpressionType, bool, int, int, int) { return BracketExpr; }
-    ExpressionType createDotAccess(ExpressionType, const Identifier*, int, int, int) { return DotExpr; }
-    ExpressionType createRegExp(const Identifier& pattern, const Identifier&, int) { return Yarr::checkSyntax(pattern.ustring()) ? 0 : RegExpExpr; }
-    ExpressionType createNewExpr(ExpressionType, int, int, int, int) { return NewExpr; }
-    ExpressionType createNewExpr(ExpressionType, int, int) { return NewExpr; }
-    ExpressionType createConditionalExpr(ExpressionType, ExpressionType, ExpressionType) { return ConditionalExpr; }
-    ExpressionType createAssignResolve(const Identifier&, ExpressionType, bool, int, int, int) { return AssignmentExpr; }
-    ExpressionType createFunctionExpr(const Identifier*, int, int, int, int, int, int) { return FunctionExpr; }
-    int createFunctionBody(bool) { return 1; }
-    int createArguments() { return 1; }
-    int createArguments(int) { return 1; }
-    int createArgumentsList(int) { return 1; }
-    int createArgumentsList(int, int) { return 1; }
-    template <bool complete> Property createProperty(const Identifier* name, int, PropertyNode::Type type)
+    int createSourceElements() { return SourceElementsResult; }
+    ExpressionType makeFunctionCallNode(const JSTokenLocation&, int, int, int, int, int) { return CallExpr; }
+    ExpressionType createCommaExpr(const JSTokenLocation&, ExpressionType expr) { return expr; }
+    ExpressionType appendToCommaExpr(const JSTokenLocation&, ExpressionType& head, ExpressionType, ExpressionType next) { head = next; return next; }
+    ExpressionType makeAssignNode(const JSTokenLocation&, ExpressionType, Operator, ExpressionType, bool, bool, int, int, int) { return AssignmentExpr; }
+    ExpressionType makePrefixNode(const JSTokenLocation&, ExpressionType, Operator, int, int, int) { return PreExpr; }
+    ExpressionType makePostfixNode(const JSTokenLocation&, ExpressionType, Operator, int, int, int) { return PostExpr; }
+    ExpressionType makeTypeOfNode(const JSTokenLocation&, ExpressionType) { return TypeofExpr; }
+    ExpressionType makeDeleteNode(const JSTokenLocation&, ExpressionType, int, int, int) { return DeleteExpr; }
+    ExpressionType makeNegateNode(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
+    ExpressionType makeBitwiseNotNode(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
+    ExpressionType createLogicalNot(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
+    ExpressionType createUnaryPlus(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
+    ExpressionType createVoid(const JSTokenLocation&, ExpressionType) { return UnaryExpr; }
+    ExpressionType thisExpr(const JSTokenLocation&, ThisTDZMode) { return ThisExpr; }
+    ExpressionType superExpr(const JSTokenLocation&) { return SuperExpr; }
+    ExpressionType createResolve(const JSTokenLocation&, const Identifier*, int) { return ResolveExpr; }
+    ExpressionType createObjectLiteral(const JSTokenLocation&) { return ObjectLiteralExpr; }
+    ExpressionType createObjectLiteral(const JSTokenLocation&, int) { return ObjectLiteralExpr; }
+    ExpressionType createArray(const JSTokenLocation&, int) { return ArrayLiteralExpr; }
+    ExpressionType createArray(const JSTokenLocation&, int, int) { return ArrayLiteralExpr; }
+    ExpressionType createDoubleExpr(const JSTokenLocation&, double) { return DoubleExpr; }
+    ExpressionType createIntegerExpr(const JSTokenLocation&, double) { return IntegerExpr; }
+    ExpressionType createString(const JSTokenLocation&, const Identifier*) { return StringExpr; }
+    ExpressionType createBoolean(const JSTokenLocation&, bool) { return BoolExpr; }
+    ExpressionType createNull(const JSTokenLocation&) { return NullExpr; }
+    ExpressionType createBracketAccess(const JSTokenLocation&, ExpressionType, ExpressionType, bool, int, int, int) { return BracketExpr; }
+    ExpressionType createDotAccess(const JSTokenLocation&, ExpressionType, const Identifier*, int, int, int) { return DotExpr; }
+    ExpressionType createRegExp(const JSTokenLocation&, const Identifier& pattern, const Identifier&, int) { return Yarr::checkSyntax(pattern.string()) ? 0 : RegExpExpr; }
+    ExpressionType createNewExpr(const JSTokenLocation&, ExpressionType, int, int, int, int) { return NewExpr; }
+    ExpressionType createNewExpr(const JSTokenLocation&, ExpressionType, int, int) { return NewExpr; }
+    ExpressionType createConditionalExpr(const JSTokenLocation&, ExpressionType, ExpressionType, ExpressionType) { return ConditionalExpr; }
+    ExpressionType createAssignResolve(const JSTokenLocation&, const Identifier&, ExpressionType, int, int, int) { return AssignmentExpr; }
+    ExpressionType createEmptyVarExpression(const JSTokenLocation&, const Identifier&) { return AssignmentExpr; }
+#if ENABLE(ES6_CLASS_SYNTAX)
+    ClassExpression createClassExpr(const JSTokenLocation&, const Identifier&, ExpressionType, ExpressionType, PropertyList, PropertyList) { return ClassExpr; }
+#endif
+    ExpressionType createFunctionExpr(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return FunctionExpr; }
+    int createFunctionBody(const JSTokenLocation&, const JSTokenLocation&, int, int, bool, int, int, int, ConstructorKind) { return FunctionBodyResult; }
+#if ENABLE(ES6_ARROWFUNCTION_SYNTAX)
+    ExpressionType createArrowFunctionExpr(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return FunctionExpr; }
+#endif 
+    void setFunctionNameStart(int, int) { }
+    int createArguments() { return ArgumentsResult; }
+    int createArguments(int) { return ArgumentsResult; }
+    ExpressionType createSpreadExpression(const JSTokenLocation&, ExpressionType, int, int, int) { return SpreadExpr; }
+#if ENABLE(ES6_TEMPLATE_LITERAL_SYNTAX)
+    TemplateString createTemplateString(const JSTokenLocation&, const Identifier&, const Identifier&) { return TemplateStringResult; }
+    TemplateStringList createTemplateStringList(TemplateString) { return TemplateStringListResult; }
+    TemplateStringList createTemplateStringList(TemplateStringList, TemplateString) { return TemplateStringListResult; }
+    TemplateExpressionList createTemplateExpressionList(Expression) { return TemplateExpressionListResult; }
+    TemplateExpressionList createTemplateExpressionList(TemplateExpressionList, Expression) { return TemplateExpressionListResult; }
+    TemplateLiteral createTemplateLiteral(const JSTokenLocation&, TemplateStringList) { return TemplateExpr; }
+    TemplateLiteral createTemplateLiteral(const JSTokenLocation&, TemplateStringList, TemplateExpressionList) { return TemplateExpr; }
+    ExpressionType createTaggedTemplate(const JSTokenLocation&, ExpressionType, TemplateLiteral, int, int, int) { return TaggedTemplateExpr; }
+#endif
+
+    int createArgumentsList(const JSTokenLocation&, int) { return ArgumentsListResult; }
+    int createArgumentsList(const JSTokenLocation&, int, int) { return ArgumentsListResult; }
+    Property createProperty(const Identifier* name, int, PropertyNode::Type type, PropertyNode::PutType, bool complete, SuperBinding = SuperBinding::NotNeeded)
     {
         if (!complete)
             return Property(type);
         ASSERT(name);
         return Property(name, type);
     }
-    template <bool complete> Property createProperty(JSGlobalData* globalData, double name, int, PropertyNode::Type type)
+    Property createProperty(VM* vm, ParserArena& parserArena, double name, int, PropertyNode::Type type, PropertyNode::PutType, bool complete)
     {
         if (!complete)
             return Property(type);
-        return Property(&globalData->parser->arena().identifierArena().makeNumericIdentifier(globalData, name), type);
-    }
-    int createPropertyList(Property) { return 1; }
-    int createPropertyList(Property, int) { return 1; }
-    int createElementList(int, int) { return 1; }
-    int createElementList(int, int, int) { return 1; }
-    int createFormalParameterList(const Identifier&) { return 1; }
-    int createFormalParameterList(int, const Identifier&) { return 1; }
-    int createClause(int, int) { return 1; }
-    int createClauseList(int) { return 1; }
-    int createClauseList(int, int) { return 1; }
-    void setUsesArguments(int) { }
-    int createFuncDeclStatement(const Identifier*, int, int, int, int, int, int) { return 1; }
-    int createBlockStatement(int, int, int) { return 1; }
-    int createExprStatement(int, int, int) { return 1; }
-    int createIfStatement(int, int, int, int) { return 1; }
-    int createIfStatement(int, int, int, int, int) { return 1; }
-    int createForLoop(int, int, int, int, bool, int, int) { return 1; }
-    int createForInLoop(const Identifier*, int, int, int, int, int, int, int, int, int, int) { return 1; }
-    int createForInLoop(int, int, int, int, int, int, int, int) { return 1; }
-    int createEmptyStatement() { return 1; }
-    int createVarStatement(int, int, int) { return 1; }
-    int createReturnStatement(int, int, int, int, int) { return 1; }
-    int createBreakStatement(int, int, int, int) { return 1; }
-    int createBreakStatement(const Identifier*, int, int, int, int) { return 1; }
-    int createContinueStatement(int, int, int, int) { return 1; }
-    int createContinueStatement(const Identifier*, int, int, int, int) { return 1; }
-    int createTryStatement(int, const Identifier*, bool, int, int, int, int) { return 1; }
-    int createSwitchStatement(int, int, int, int, int, int) { return 1; }
-    int createWhileStatement(int, int, int, int) { return 1; }
-    int createWithStatement(int, int, int, int, int, int) { return 1; }
-    int createDoWhileStatement(int, int, int, int) { return 1; }
-    int createLabelStatement(const Identifier*, int, int, int) { return 1; }
-    int createThrowStatement(int, int, int, int, int) { return 1; }
-    int createDebugger(int, int) { return 1; }
-    int createConstStatement(int, int, int) { return 1; }
-    int appendConstDecl(int, const Identifier*, int) { return 1; }
-    template <bool strict> Property createGetterOrSetterProperty(PropertyNode::Type type, const Identifier* name, int, int, int, int, int, int)
+        return Property(&parserArena.identifierArena().makeNumericIdentifier(vm, name), type);
+    }
+    Property createProperty(int, int, PropertyNode::Type type, PropertyNode::PutType, bool)
+    {
+        return Property(type);
+    }
+    int createPropertyList(const JSTokenLocation&, Property) { return PropertyListResult; }
+    int createPropertyList(const JSTokenLocation&, Property, int) { return PropertyListResult; }
+    int createElementList(int, int) { return ElementsListResult; }
+    int createElementList(int, int, int) { return ElementsListResult; }
+    int createFormalParameterList(DestructuringPattern) { return FormalParameterListResult; }
+    int createFormalParameterList(int, DestructuringPattern) { return FormalParameterListResult; }
+    int createClause(int, int) { return ClauseResult; }
+    int createClauseList(int) { return ClauseListResult; }
+    int createClauseList(int, int) { return ClauseListResult; }
+    int createFuncDeclStatement(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return StatementResult; }
+#if ENABLE(ES6_CLASS_SYNTAX)
+    int createClassDeclStatement(const JSTokenLocation&, ClassExpression,
+        const JSTextPosition&, const JSTextPosition&, int, int) { return StatementResult; }
+#endif
+    int createBlockStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
+    int createExprStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
+    int createIfStatement(const JSTokenLocation&, int, int, int, int) { return StatementResult; }
+    int createIfStatement(const JSTokenLocation&, int, int, int, int, int) { return StatementResult; }
+    int createForLoop(const JSTokenLocation&, int, int, int, int, int, int) { return StatementResult; }
+    int createForInLoop(const JSTokenLocation&, int, int, int, int, int, int, int, int) { return StatementResult; }
+    int createForOfLoop(const JSTokenLocation&, int, int, int, int, int, int, int, int) { return StatementResult; }
+    int createEmptyStatement(const JSTokenLocation&) { return StatementResult; }
+    int createVarStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
+    int createReturnStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
+    int createBreakStatement(const JSTokenLocation&, int, int) { return StatementResult; }
+    int createBreakStatement(const JSTokenLocation&, const Identifier*, int, int) { return StatementResult; }
+    int createContinueStatement(const JSTokenLocation&, int, int) { return StatementResult; }
+    int createContinueStatement(const JSTokenLocation&, const Identifier*, int, int) { return StatementResult; }
+    int createTryStatement(const JSTokenLocation&, int, const Identifier*, int, int, int, int) { return StatementResult; }
+    int createSwitchStatement(const JSTokenLocation&, int, int, int, int, int, int) { return StatementResult; }
+    int createWhileStatement(const JSTokenLocation&, int, int, int, int) { return StatementResult; }
+    int createWithStatement(const JSTokenLocation&, int, int, int, int, int, int) { return StatementResult; }
+    int createDoWhileStatement(const JSTokenLocation&, int, int, int, int) { return StatementResult; }
+    int createLabelStatement(const JSTokenLocation&, const Identifier*, int, int, int) { return StatementResult; }
+    int createThrowStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
+    int createDebugger(const JSTokenLocation&, int, int) { return StatementResult; }
+    int createConstStatement(const JSTokenLocation&, int, int, int) { return StatementResult; }
+    int appendConstDecl(const JSTokenLocation&, int, const Identifier*, int) { return StatementResult; }
+    Property createGetterOrSetterProperty(const JSTokenLocation&, PropertyNode::Type type, bool strict, const Identifier* name, const ParserFunctionInfo<SyntaxChecker>&, SuperBinding)
     {
         ASSERT(name);
         if (!strict)
             return Property(type);
         return Property(name, type);
     }
+    Property createGetterOrSetterProperty(VM* vm, ParserArena& parserArena, const JSTokenLocation&, PropertyNode::Type type, bool strict, double name, const ParserFunctionInfo<SyntaxChecker>&, SuperBinding)
+    {
+        if (!strict)
+            return Property(type);
+        return Property(&parserArena.identifierArena().makeNumericIdentifier(vm, name), type);
+    }
 
     void appendStatement(int, int) { }
     void addVar(const Identifier*, bool) { }
-    int combineCommaNodes(int, int) { return 1; }
+    int combineCommaNodes(const JSTokenLocation&, int, int) { return CommaExpr; }
     int evalCount() const { return 0; }
     void appendBinaryExpressionInfo(int& operandStackDepth, int expr, int, int, int, bool)
     {
@@ -228,21 +286,62 @@ public:
     bool operatorStackHasHigherPrecedence(int&, int) { return true; }
     BinaryOperand getFromOperandStack(int) { return m_topBinaryExpr; }
     void shrinkOperandStackBy(int& operandStackDepth, int amount) { operandStackDepth -= amount; }
-    void appendBinaryOperation(int& operandStackDepth, int&, BinaryOperand, BinaryOperand) { operandStackDepth++; }
+    void appendBinaryOperation(const JSTokenLocation&, int& operandStackDepth, int&, BinaryOperand, BinaryOperand) { operandStackDepth++; }
     void operatorStackAppend(int& operatorStackDepth, int, int) { operatorStackDepth++; }
     int popOperandStack(int&) { int res = m_topBinaryExpr; m_topBinaryExpr = 0; return res; }
     
     void appendUnaryToken(int& stackDepth, int tok, int) { stackDepth = 1; m_topUnaryToken = tok; }
     int unaryTokenStackLastType(int&) { return m_topUnaryToken; }
-    int unaryTokenStackLastStart(int&) { return 0; }
+    JSTextPosition unaryTokenStackLastStart(int&) { return JSTextPosition(0, 0, 0); }
     void unaryTokenStackRemoveLast(int& stackDepth) { stackDepth = 0; }
     
     void assignmentStackAppend(int, int, int, int, int, Operator) { }
-    int createAssignment(int, int, int, int, int) { ASSERT_NOT_REACHED(); return 1; }
-    const Identifier& getName(const Property& property) const { ASSERT(property.name); return *property.name; }
+    int createAssignment(const JSTokenLocation&, int, int, int, int, int) { RELEASE_ASSERT_NOT_REACHED(); return AssignmentExpr; }
+    const Identifier* getName(const Property& property) const { return property.name; }
     PropertyNode::Type getType(const Property& property) const { return property.type; }
     bool isResolve(ExpressionType expr) const { return expr == ResolveExpr || expr == ResolveEvalExpr; }
+    ExpressionType createDestructuringAssignment(const JSTokenLocation&, int, ExpressionType)
+    {
+        return DestructuringAssignment;
+    }
     
+    ArrayPattern createArrayPattern(const JSTokenLocation&)
+    {
+        return ArrayDestructuring;
+    }
+    void appendArrayPatternSkipEntry(ArrayPattern, const JSTokenLocation&)
+    {
+    }
+    void appendArrayPatternEntry(ArrayPattern, const JSTokenLocation&, DestructuringPattern, int)
+    {
+    }
+    void appendArrayPatternRestEntry(ArrayPattern, const JSTokenLocation&, DestructuringPattern)
+    {
+    }
+    void finishArrayPattern(ArrayPattern, const JSTextPosition&, const JSTextPosition&, const JSTextPosition&)
+    {
+    }
+    ObjectPattern createObjectPattern(const JSTokenLocation&)
+    {
+        return ObjectDestructuring;
+    }
+    void appendObjectPatternEntry(ArrayPattern, const JSTokenLocation&, bool, const Identifier&, DestructuringPattern, int)
+    {
+    }
+    DestructuringPattern createBindingLocation(const JSTokenLocation&, const Identifier&, const JSTextPosition&, const JSTextPosition&)
+    {
+        return BindingDestructuring;
+    }
+
+    bool isBindingNode(DestructuringPattern pattern)
+    {
+        return pattern == BindingDestructuring;
+    }
+
+    void setEndOffset(int, int) { }
+    int endOffset(int) { return 0; }
+    void setStartOffset(int, int) { }
+
 private:
     int m_topBinaryExpr;
     int m_topUnaryToken;