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diff --git a/Source/JavaScriptCore/parser/SyntaxChecker.h b/Source/JavaScriptCore/parser/SyntaxChecker.h
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+/*
+ * 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
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SyntaxChecker_h
+#define SyntaxChecker_h
+
+#include "Lexer.h"
+#include "ParserFunctionInfo.h"
+#include "YarrSyntaxChecker.h"
+
+namespace JSC {
+    
+class SyntaxChecker {
+public:
+    struct BinaryExprContext {
+        BinaryExprContext(SyntaxChecker& context)
+            : m_context(&context)
+        {
+            m_context->m_topBinaryExprs.append(m_context->m_topBinaryExpr);
+            m_context->m_topBinaryExpr = 0;
+        }
+        ~BinaryExprContext()
+        {
+            m_context->m_topBinaryExpr = m_context->m_topBinaryExprs.last();
+            m_context->m_topBinaryExprs.removeLast();
+        }
+    private:
+        SyntaxChecker* m_context;
+    };
+    struct UnaryExprContext {
+        UnaryExprContext(SyntaxChecker& context)
+            : m_context(&context)
+        {
+            m_context->m_topUnaryTokens.append(m_context->m_topUnaryToken);
+            m_context->m_topUnaryToken = 0;
+        }
+        ~UnaryExprContext()
+        {
+            m_context->m_topUnaryToken = m_context->m_topUnaryTokens.last();
+            m_context->m_topUnaryTokens.removeLast();
+        }
+    private:
+        SyntaxChecker* m_context;
+    };
+    
+    SyntaxChecker(VM* , void*)
+    {
+    }
+
+    enum { NoneExpr = 0,
+        ResolveEvalExpr, ResolveExpr, IntegerExpr, DoubleExpr, StringExpr,
+        ThisExpr, NullExpr, BoolExpr, RegExpExpr, ObjectLiteralExpr,
+        FunctionExpr, ClassExpr, SuperExpr, BracketExpr, DotExpr, CallExpr,
+        NewExpr, PreExpr, PostExpr, UnaryExpr, BinaryExpr,
+        ConditionalExpr, AssignmentExpr, TypeofExpr, NewTargetExpr,
+        DeleteExpr, ArrayLiteralExpr, BindingDestructuring,
+        ArrayDestructuring, ObjectDestructuring, SourceElementsResult,
+        FunctionBodyResult, SpreadExpr, ArgumentsResult,
+        PropertyListResult, ArgumentsListResult, ElementsListResult,
+        StatementResult, FormalParameterListResult, ClauseResult,
+        ClauseListResult, CommaExpr, DestructuringAssignment,
+        TemplateStringResult, TemplateStringListResult,
+        TemplateExpressionListResult, TemplateExpr,
+        TaggedTemplateExpr,
+        ModuleNameResult,
+        ImportSpecifierResult, ImportSpecifierListResult,
+        ExportSpecifierResult, ExportSpecifierListResult
+    };
+    typedef int ExpressionType;
+
+    typedef ExpressionType Expression;
+    typedef int SourceElements;
+    typedef int Arguments;
+    typedef ExpressionType Comma;
+    struct Property {
+        ALWAYS_INLINE Property(void* = 0)
+            : type((PropertyNode::Type)0)
+        {
+        }
+        ALWAYS_INLINE Property(const Identifier* ident, PropertyNode::Type ty)
+            : name(ident)
+            , type(ty)
+        {
+        }
+        ALWAYS_INLINE Property(PropertyNode::Type ty)
+            : name(0)
+            , type(ty)
+        {
+        }
+        ALWAYS_INLINE bool operator!() { return !type; }
+        const Identifier* name;
+        PropertyNode::Type type;
+    };
+    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 ModuleName;
+    typedef int ImportSpecifier;
+    typedef int ImportSpecifierList;
+    typedef int ExportSpecifier;
+    typedef int ExportSpecifierList;
+    typedef int Statement;
+    typedef int ClauseList;
+    typedef int Clause;
+    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 = LexexFlagsDontBuildKeywords;
+    static const unsigned DontBuildStrings = LexerFlagsDontBuildStrings;
+
+    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 createThisExpr(const JSTokenLocation&, ThisTDZMode) { return ThisExpr; }
+    ExpressionType createSuperExpr(const JSTokenLocation&) { return SuperExpr; }
+    ExpressionType createNewTargetExpr(const JSTokenLocation&) { return NewTargetExpr; }
+    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, AssignmentContext) { return AssignmentExpr; }
+    ExpressionType createEmptyVarExpression(const JSTokenLocation&, const Identifier&) { return AssignmentExpr; }
+    ExpressionType createEmptyLetExpression(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 createFunctionMetadata(const JSTokenLocation&, const JSTokenLocation&, int, int, bool, int, int, int, ConstructorKind, unsigned, SourceParseMode) { return FunctionBodyResult; }
+    ExpressionType createArrowFunctionExpr(const JSTokenLocation&, const ParserFunctionInfo<SyntaxChecker>&) { return FunctionExpr; }
+    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);
+    }
+    Property createProperty(VM* vm, ParserArena& parserArena, double name, int, PropertyNode::Type type, PropertyNode::PutType, bool complete)
+    {
+        if (!complete)
+            return Property(type);
+        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() { return FormalParameterListResult; }
+    void appendParameter(int, DestructuringPattern, int) { }
+    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, VariableEnvironment&) { 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, VariableEnvironment&) { return StatementResult; }
+    int createForInLoop(const JSTokenLocation&, int, int, int, int, int, int, int, int, VariableEnvironment&) { return StatementResult; }
+    int createForOfLoop(const JSTokenLocation&, int, int, int, int, int, int, int, int, VariableEnvironment&) { return StatementResult; }
+    int createEmptyStatement(const JSTokenLocation&) { return StatementResult; }
+    int createDeclarationStatement(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, VariableEnvironment&) { return StatementResult; }
+    int createSwitchStatement(const JSTokenLocation&, int, int, int, int, int, int, VariableEnvironment&) { 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 createModuleName(const JSTokenLocation&, const Identifier&) { return ModuleNameResult; }
+    ImportSpecifier createImportSpecifier(const JSTokenLocation&, const Identifier&, const Identifier&) { return ImportSpecifierResult; }
+    ImportSpecifierList createImportSpecifierList() { return ImportSpecifierListResult; }
+    void appendImportSpecifier(ImportSpecifierList, ImportSpecifier) { }
+    int createImportDeclaration(const JSTokenLocation&, ImportSpecifierList, ModuleName) { return StatementResult; }
+    int createExportAllDeclaration(const JSTokenLocation&, ModuleName) { return StatementResult; }
+    int createExportDefaultDeclaration(const JSTokenLocation&, int, const Identifier&) { return StatementResult; }
+    int createExportLocalDeclaration(const JSTokenLocation&, int) { return StatementResult; }
+    int createExportNamedDeclaration(const JSTokenLocation&, ExportSpecifierList, ModuleName) { return StatementResult; }
+    ExportSpecifier createExportSpecifier(const JSTokenLocation&, const Identifier&, const Identifier&) { return ExportSpecifierResult; }
+    ExportSpecifierList createExportSpecifierList() { return ExportSpecifierListResult; }
+    void appendExportSpecifier(ExportSpecifierList, ExportSpecifier) { }
+
+    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) { }
+    int combineCommaNodes(const JSTokenLocation&, int, int) { return CommaExpr; }
+    int evalCount() const { return 0; }
+    void appendBinaryExpressionInfo(int& operandStackDepth, int expr, int, int, int, bool)
+    {
+        if (!m_topBinaryExpr)
+            m_topBinaryExpr = expr;
+        else
+            m_topBinaryExpr = BinaryExpr;
+        operandStackDepth++;
+    }
+    
+    // Logic to handle datastructures used during parsing of binary expressions
+    void operatorStackPop(int& operatorStackDepth) { operatorStackDepth--; }
+    bool operatorStackHasHigherPrecedence(int&, int) { return true; }
+    BinaryOperand getFromOperandStack(int) { return m_topBinaryExpr; }
+    void shrinkOperandStackBy(int& operandStackDepth, int amount) { operandStackDepth -= amount; }
+    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; }
+    JSTextPosition unaryTokenStackLastStart(int&) { return JSTextPosition(0, 0, 0); }
+    void unaryTokenStackRemoveLast(int& stackDepth) { stackDepth = 0; }
+    
+    void assignmentStackAppend(int, int, int, int, int, Operator) { }
+    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&, AssignmentContext)
+    {
+        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;
+    Vector<int, 8> m_topBinaryExprs;
+    Vector<int, 8> m_topUnaryTokens;
+};
+
+}
+
+#endif