Bug 513464 - Remove Nashorn extension from JSDT

Signed-off-by: Victor Rubezhny <vrubezhny@redhat.com>

8 files changed, 1 insertions, 7640 deletions

diff --git a/bundles/org.eclipse.wst.jsdt.core/.classpath b/bundles/org.eclipse.wst.jsdt.core/.classpath
index 1963e9526..7a72f5c20 100644
--- a/bundles/org.eclipse.wst.jsdt.core/.classpath
+++ b/bundles/org.eclipse.wst.jsdt.core/.classpath
@@ -1,11 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>

 <classpath>

 	<classpathentry kind="src" path="src"/>

-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">

-		<accessrules>

-			<accessrule kind="accessible" pattern="**/nashorn/**"/>

-		</accessrules>

-	</classpathentry>

+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8" />

 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>

 	<classpathentry kind="output" path="bin"/>

 </classpath>

diff --git a/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/DOMASTConverter.java b/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/DOMASTConverter.java
deleted file mode 100644
index f8cec9c2d..000000000
--- a/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/DOMASTConverter.java
+++ /dev/null
@@ -1,1330 +0,0 @@
-/*******************************************************************************

- * Copyright (c) 2015-2016 Red Hat, Inc.

- * All rights reserved. This program and the accompanying materials

- * are made available under the terms of the Eclipse Public License v1.0

- * which accompanies this distribution, and is available at

- * http://www.eclipse.org/legal/epl-v10.html

- *

- * 	Contributors:

- * 		 Red Hat Inc. - initial API and implementation and/or initial documentation

- *******************************************************************************/

-package org.eclipse.wst.jsdt.internal.esprima;

-

-import static org.eclipse.wst.jsdt.core.dom.ASTNode.*;

-

-import java.util.Map;

-import java.util.Stack;

-

-import org.eclipse.core.runtime.Assert;

-import org.eclipse.wst.jsdt.core.UnimplementedException;

-import org.eclipse.wst.jsdt.core.dom.AST;

-import org.eclipse.wst.jsdt.core.dom.ASTNode;

-import org.eclipse.wst.jsdt.core.dom.AbstractTypeDeclaration;

-import org.eclipse.wst.jsdt.core.dom.ArrayAccess;

-import org.eclipse.wst.jsdt.core.dom.ArrayInitializer;

-import org.eclipse.wst.jsdt.core.dom.ArrayName;

-import org.eclipse.wst.jsdt.core.dom.ArrowFunctionExpression;

-import org.eclipse.wst.jsdt.core.dom.Assignment;

-import org.eclipse.wst.jsdt.core.dom.AssignmentName;

-import org.eclipse.wst.jsdt.core.dom.Block;

-import org.eclipse.wst.jsdt.core.dom.BreakStatement;

-import org.eclipse.wst.jsdt.core.dom.CatchClause;

-import org.eclipse.wst.jsdt.core.dom.ClassInstanceCreation;

-import org.eclipse.wst.jsdt.core.dom.Comment;

-import org.eclipse.wst.jsdt.core.dom.ConditionalExpression;

-import org.eclipse.wst.jsdt.core.dom.ContinueStatement;

-import org.eclipse.wst.jsdt.core.dom.DebuggerStatement;

-import org.eclipse.wst.jsdt.core.dom.DoStatement;

-import org.eclipse.wst.jsdt.core.dom.EmptyStatement;

-import org.eclipse.wst.jsdt.core.dom.ExportDeclaration;

-import org.eclipse.wst.jsdt.core.dom.Expression;

-import org.eclipse.wst.jsdt.core.dom.ExpressionStatement;

-import org.eclipse.wst.jsdt.core.dom.FieldAccess;

-import org.eclipse.wst.jsdt.core.dom.ForInStatement;

-import org.eclipse.wst.jsdt.core.dom.ForOfStatement;

-import org.eclipse.wst.jsdt.core.dom.ForStatement;

-import org.eclipse.wst.jsdt.core.dom.FunctionDeclaration;

-import org.eclipse.wst.jsdt.core.dom.FunctionDeclarationStatement;

-import org.eclipse.wst.jsdt.core.dom.FunctionExpression;

-import org.eclipse.wst.jsdt.core.dom.FunctionInvocation;

-import org.eclipse.wst.jsdt.core.dom.IfStatement;

-import org.eclipse.wst.jsdt.core.dom.ImportDeclaration;

-import org.eclipse.wst.jsdt.core.dom.InfixExpression;

-import org.eclipse.wst.jsdt.core.dom.JSdoc;

-import org.eclipse.wst.jsdt.core.dom.JavaScriptUnit;

-import org.eclipse.wst.jsdt.core.dom.LabeledStatement;

-import org.eclipse.wst.jsdt.core.dom.ListExpression;

-import org.eclipse.wst.jsdt.core.dom.MetaProperty;

-import org.eclipse.wst.jsdt.core.dom.Modifier;

-import org.eclipse.wst.jsdt.core.dom.Modifier.ModifierKeyword;

-import org.eclipse.wst.jsdt.core.dom.ModuleSpecifier;

-import org.eclipse.wst.jsdt.core.dom.Name;

-import org.eclipse.wst.jsdt.core.dom.ObjectLiteral;

-import org.eclipse.wst.jsdt.core.dom.ObjectLiteralField;

-import org.eclipse.wst.jsdt.core.dom.ObjectLiteralField.FieldKind;

-import org.eclipse.wst.jsdt.core.dom.ObjectName;

-import org.eclipse.wst.jsdt.core.dom.PostfixExpression;

-import org.eclipse.wst.jsdt.core.dom.PrefixExpression;

-import org.eclipse.wst.jsdt.core.dom.ProgramElement;

-import org.eclipse.wst.jsdt.core.dom.RestElementName;

-import org.eclipse.wst.jsdt.core.dom.ReturnStatement;

-import org.eclipse.wst.jsdt.core.dom.SimpleName;

-import org.eclipse.wst.jsdt.core.dom.SingleVariableDeclaration;

-import org.eclipse.wst.jsdt.core.dom.SpreadElement;

-import org.eclipse.wst.jsdt.core.dom.Statement;

-import org.eclipse.wst.jsdt.core.dom.StringLiteral;

-import org.eclipse.wst.jsdt.core.dom.SuperMethodInvocation;

-import org.eclipse.wst.jsdt.core.dom.SwitchCase;

-import org.eclipse.wst.jsdt.core.dom.SwitchStatement;

-import org.eclipse.wst.jsdt.core.dom.TemplateElement;

-import org.eclipse.wst.jsdt.core.dom.TemplateLiteral;

-import org.eclipse.wst.jsdt.core.dom.ThisExpression;

-import org.eclipse.wst.jsdt.core.dom.ThrowStatement;

-import org.eclipse.wst.jsdt.core.dom.TryStatement;

-import org.eclipse.wst.jsdt.core.dom.TypeDeclaration;

-import org.eclipse.wst.jsdt.core.dom.TypeDeclarationExpression;

-import org.eclipse.wst.jsdt.core.dom.TypeDeclarationStatement;

-import org.eclipse.wst.jsdt.core.dom.VariableDeclaration;

-import org.eclipse.wst.jsdt.core.dom.VariableDeclarationExpression;

-import org.eclipse.wst.jsdt.core.dom.VariableDeclarationFragment;

-import org.eclipse.wst.jsdt.core.dom.VariableDeclarationStatement;

-import org.eclipse.wst.jsdt.core.dom.VariableKind;

-import org.eclipse.wst.jsdt.core.dom.WhileStatement;

-import org.eclipse.wst.jsdt.core.dom.WithStatement;

-import org.eclipse.wst.jsdt.core.dom.YieldExpression;

-

-import jdk.nashorn.api.scripting.ScriptObjectMirror;

-

-/**

- * Converts ESTree AST to DOM AST.

- *

- * @author Gorkem Ercan

- *

- */

-public class DOMASTConverter extends EStreeVisitor{

-

-	private final AST ast;

-	private Stack<ASTNode> nodes = new Stack<ASTNode>();

-	private final JavaScriptUnit root;

-	// Because switch also hosts all the statements in the case

-	// statement we need to pointer to hold the currently processed switch

-	private Stack<SwitchStatement> processingSwitchStatements = new Stack<SwitchStatement>();

-

-	/**

-	 *

-	 */

-	public DOMASTConverter(final JavaScriptUnit unit) {

-		if(unit == null )

-			throw new IllegalArgumentException();

-		this.root = unit;

-		this.ast = unit.getAST();

-	}

-

-	public JavaScriptUnit convert(ScriptObjectMirror jsobject){

-		this.traverse(jsobject);

-		Assert.isTrue(nodes.empty(),"Some nodes are not processed"); //$NON-NLS-1$

-		return root;

-	}

-

-	/* (non-Javadoc)

-	 * @see org.eclipse.wst.jsdt.internal.esprima.EStreeVisitor#visit(jdk.nashorn.api.scripting.ScriptObjectMirror, org.eclipse.wst.jsdt.internal.esprima.ESTreeNodeTypes)

-	 */

-	public VisitOptions visit(final ScriptObjectMirror object, final ESTreeNodeTypes nodeType, final String key) {

-

-		//Generate the dom AST objects and push it to stack.

-		switch(nodeType){

-			case Program:

-				return convertProgram(object);

-			case Identifier:

-				return convertIdentifier(object);

-			case Literal:

-				return convertLiteral(object);

-			// Declarations

-			case VariableDeclaration:

-				return convertVariableDeclaration(object);

-			case VariableDeclarator:

-				return convertVariableDeclarator(object);

-			case FunctionDeclaration:

-				return convertFunctionDeclaration(object);

-		    //Statements

-			case ExpressionStatement:

-				return convertExpressionStatement(object);

-			case BlockStatement:

-				return convertBlockStatement(object);

-			case EmptyStatement:

-				return convertEmptyStatement(object);

-			case DebuggerStatement:

-				return convertDebuggerStatememt(object);

-			case WithStatement:

-				return convertWithStatement(object);

-			case ReturnStatement:

-				return convertReturnStatement(object);

-			case LabeledStatement:

-				return converLabeledStatement(object);

-			case BreakStatement:

-				return convertBreakStatement(object);

-			case ContinueStatement:

-				return convertContinueStatement(object);

-			case IfStatement:

-				return convertIfStatement(object);

-			case SwitchStatement:

-				return convertSwitchStatement(object);

-			case SwitchCase:

-				return convertSwitchCaseStatement(object);

-			case ThrowStatement:

-				return convertThrowStatement(object);

-			case TryStatement:

-				return convertTryStatement(object);

-			case CatchClause:

-				return convertCatchClause(object);

-			case WhileStatement:

-				return convertWhileStatement(object);

-			case DoWhileStatement:

-				return convertDoWhileStatement(object);

-			case ForStatement:

-				return convertForStatement(object);

-			case ForInStatement:

-				return convertForInStatement(object);

-			case ForOfStatement:

-				return convertForOfStatement(object);

-			case ClassDeclaration:

-				return convertClassDeclaration(object);

-			case ClassExpression:

-				return convertClassExpression(object);

-			case ClassBody:

-				// ClassBody is represented with a single TypeDeclaration

-				// pushing the TypeDeclaration created for ClassDeclaration

-				// twice to stack so that endVisit does not fail.

-				return VisitOptions.CONTINUE;

-			case MethodDefinition:

-				return convertMethodDefinition(object);

-			// Expressions

-			case ThisExpression:

-				return convertThisExpression(object);

-			case ArrayExpression:

-				return convertArrayExpression(object);

-			case ObjectExpression:

-				return convertObjectExpression(object);

-			case Property:// related to ObjectExpression

-				return convertPropertyExpression(object);

-			case FunctionExpression:

-				return convertFunctionExpression(object);

-			case UnaryExpression://intentional

-			case UpdateExpression:

-				return convertUnaryOperation(object);

-			case BinaryExpression: //intentional

-			case LogicalExpression:

-				return convertBinaryExpression(object);

-			case AssignmentExpression:

-				return convertAssignmentExpression(object);

-			case MemberExpression:

-				return convertMemberExpression(object);

-			case ConditionalExpression:

-				return convertConditionalExpression(object);

-			case CallExpression:

-				return convertCallExpression(object);

-			case SequenceExpression:

-				return convertSequenceExpression(object);

-			case YieldExpression:

-				return convertYieldExpression(object);

-			case NewExpression:

-				return convertNewExpression(object);

-			case ArrowFunctionExpression:

-				return convertArrowFunctionExpression(object);

-			case Super://Skip super handled on callExpression

-				return VisitOptions.CONTINUE;

-			case RestElement:

-				return convertRestElement(object);

-			case ArrayPattern:

-				return convertArrayPattern(object);

-			case ObjectPattern:

-				return convertObjectPattern(object);

-			case TemplateLiteral:

-			case TaggedTemplateExpression:

-				return convertTemplateLiteral(object,key);

-			case TemplateElement:

-				return convertTemplateElement(object);

-			case AssignmentPattern:

-				return convertAssignmentPattern(object);

-			case SpreadElement:

-				return convertSpreadElement(object);

-			case MetaProperty:

-				return convertMetaProperty(object);

-			case ImportDeclaration:

-				return convertImportDeclaration(object);

-			case ImportSpecifier:

-				return convertImportSpecifer(object, false, false);

-			case ImportDefaultSpecifier:

-				return convertImportSpecifer(object, true, false);

-			case ImportNamespaceSpecifier:

-				return convertImportSpecifer(object, false, true);

-			case ExportNamedDeclaration:

-				return convertExportDeclaration(object, false, false);

-			case ExportSpecifier:

-				return convertExportSpecifier(object);

-			case ExportAllDeclaration:

-				return convertExportDeclaration(object, false, true);

-			case ExportDefaultDeclaration:

-				return convertExportDeclaration(object, true, false);

-

-			default:

-				throw new UnimplementedException(nodeType.getTypeString() + " conversion is not implemented"); //$NON-NLS-1$

-		}

-	}

-

-

-

-

-

-	/* (non-Javadoc)

-	 * @see org.eclipse.wst.jsdt.internal.esprima.EStreeVisitor#endVisit(jdk.nashorn.api.scripting.ScriptObjectMirror, org.eclipse.wst.jsdt.internal.esprima.ESTreeNodeTypes)

-	 */

-	public VisitOptions endVisit(final ScriptObjectMirror object, final ESTreeNodeTypes nodeType, final String key) {

-

-		if(nodeType == ESTreeNodeTypes.Super)//Skip nothing is pushed for these nodes during visit

-			return VisitOptions.CONTINUE;

-		

-		//Read the dom ast model objects from stack and connect them to parent.

-		ASTNode current = nodes.pop();

-		//Set source range for all the nodes.

-		//we can safely move this to visit

-		setRange(object, current);

-

-		ASTNode parent = null;

-		if( nodeType != ESTreeNodeTypes.Program){ //Nodes can be empty only for Program

-			Assert.isTrue(!nodes.empty());

-			parent = nodes.peek();

-		}

-

-		try{

-			//clean-up the switch statement

-			if(current.getNodeType() == SWITCH_STATEMENT)

-				processingSwitchStatements.pop();

-			if(current.getNodeType() == MODULE_SPECIFIER)

-				assignModuleSpecifier((ModuleSpecifier) current, parent);

-			else

-			if(current instanceof Expression )

-				assignExpressionToParent((Expression) current, parent, key);

-			else

-			if(current instanceof ProgramElement)

-				assignStatementToParent((ProgramElement) current, parent, key);

-			else

-			if(current instanceof VariableDeclaration)

-				assignVariableDeclarationToParent((VariableDeclaration) current, parent);

-			else

-			if(current.getNodeType() == CATCH_CLAUSE)

-				assignCatchToTry(current, parent);

-			else

-			if(current.getNodeType() == TEMPLATE_ELEMENT)

-				assingTemplateElement(current, parent);

-			else

-			if(current.getNodeType() == IMPORT_DECLARATION)

-				root.imports().add(current);

-			else

-			if(current.getNodeType() == EXPORT_DECLARATION)

-				root.exports().add(current);

-

-		}catch(Exception e){

-			StringBuilder sb = new StringBuilder(e.toString());

-			sb.append(" assigning "); //$NON-NLS-1$

-			sb.append(current.getClass().getSimpleName());

-			sb.append("["); //$NON-NLS-1$

-			sb.append(current);

-			sb.append("]"); //$NON-NLS-1$

-			if( parent!=null ){

-				sb.append(" to "); //$NON-NLS-1$

-				sb.append(parent.getClass().getSimpleName());

-				sb.append("["); //$NON-NLS-1$

-				sb.append(parent);

-				sb.append("]"); //$NON-NLS-1$

-			}

-			System.out.println(sb);

-			throw e;

-		}

-		if(current.getStartPosition() < 0)

-			throw new IllegalStateException();

-

-		return VisitOptions.CONTINUE;

-	}

-

-	private void assignModuleSpecifier(ModuleSpecifier module, ASTNode parent) {

-		switch(parent.getNodeType()){

-			case IMPORT_DECLARATION:

-				ImportDeclaration importDec = (ImportDeclaration) parent;

-				importDec.specifiers().add(module);

-				break;

-			case EXPORT_DECLARATION:

-				ExportDeclaration exportDec = (ExportDeclaration)parent;

-				exportDec.specifiers().add(module);

-				break;

-			default:

-				throw new UnimplementedException("Assigning "+ module + " to "+parent+ " is not handled");   //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$

-

-		}

-

-	}

-

-	private void assingTemplateElement(ASTNode current, ASTNode parent) {

-		((TemplateLiteral) parent).elements().add(current);

-	}

-

-

-	private void setRange(final ScriptObjectMirror object, final ASTNode node){

-		Object o = object.getMember("range"); //$NON-NLS-1$

-		if (ScriptObjectMirror.isUndefined(o)) return;

-		ScriptObjectMirror range = (ScriptObjectMirror) o;

-		Number x = (Number) range.getSlot(0);

-		Number y = (Number) range.getSlot(1);

-		final int startPosition = x.intValue();

-		final int length = y.intValue() - x.intValue();

-		node.setSourceRange(startPosition, length);

-		

-		

-		switch (node.getNodeType()) {

-			case ASTNode.FUNCTION_DECLARATION_STATEMENT :

-				FunctionDeclarationStatement fd = (FunctionDeclarationStatement) node;

-				if(fd.getDeclaration().getJavadoc()==null)

-					fd.getDeclaration().setSourceRange(startPosition, length);

-				else {

-					final int jsdocStart = fd.getDeclaration().getJavadoc().getStartPosition();

-					fd.getDeclaration().setSourceRange(jsdocStart, length + startPosition - jsdocStart);

-				}				

-				break;

-			case ASTNode.FUNCTION_EXPRESSION:

-				FunctionExpression fe = (FunctionExpression)node;

-				if(fe.getMethod().getJavadoc() == null )

-					fe.getMethod().setSourceRange(startPosition, length);

-				else {

-					final int jsdocStart = fe.getMethod().getJavadoc().getStartPosition();

-					fe.getMethod().setSourceRange(jsdocStart, length + startPosition - jsdocStart);

-				}

-				break;

-			case ASTNode.FUNCTION_DECLARATION:

-				FunctionDeclaration fdec = (FunctionDeclaration)node;

-				if(fdec.getJavadoc() != null){

-					final int jsdocStart = fdec.getJavadoc().getStartPosition();

-					fdec.setSourceRange(jsdocStart, length + startPosition - jsdocStart);

-				}

-				break;

-			case ASTNode.VARIABLE_DECLARATION_STATEMENT:

-				VariableDeclarationStatement vds = (VariableDeclarationStatement)node;

-				if(vds.getJavadoc() != null){

-					final int jsdocStart = vds.getJavadoc().getStartPosition();

-					vds.setSourceRange(jsdocStart, length + startPosition - jsdocStart);

-				}

-				break;

-		}

-	}

-

-	private void assignStatementToParent(final ProgramElement statement, final ASTNode parent, final String key){

-		switch(parent.getNodeType()){

-			case JAVASCRIPT_UNIT:

-				JavaScriptUnit unit = (JavaScriptUnit)parent;

-				unit.statements().add(statement);

-				break;

-			case FUNCTION_EXPRESSION:

-				FunctionExpression fe = (FunctionExpression)parent;

-				//assign to contained FunctionDeclaration

-				fe.getMethod().setBody((Block) statement);

-				break;

-			case FUNCTION_DECLARATION:

-				FunctionDeclaration fdec = (FunctionDeclaration)parent;

-				fdec.setBody((Block)statement);

-				break;

-			case FUNCTION_DECLARATION_STATEMENT:

-				FunctionDeclarationStatement fdecS = (FunctionDeclarationStatement)parent;

-				fdecS.getDeclaration().setBody((Block)statement);

-				break;

-			case ARROW_FUNCTION_EXPRESSION:

-				ArrowFunctionExpression af = (ArrowFunctionExpression) parent;

-				af.setBody((Block)statement);

-				break;

-			case BLOCK:

-				Block b = (Block) parent;

-				b.statements().add(statement);

-				break;

-			case WITH_STATEMENT:

-				WithStatement ws = (WithStatement)parent;

-				ws.setBody((Statement)statement);

-				break;

-			case LABELED_STATEMENT:

-				LabeledStatement ls = (LabeledStatement)parent;

-				ls.setBody((Statement)statement);

-				break;

-			case IF_STATEMENT : {

-				IfStatement is = (IfStatement) parent;

-				if ("alternate".equals(key))  //$NON-NLS-1$

-					is.setElseStatement((Statement) statement);

-				else if ("consequent".equals(key))  //$NON-NLS-1$

-					is.setThenStatement((Statement) statement);

-				break;

-			}

-			case SWITCH_STATEMENT:

-				SwitchStatement ss  = (SwitchStatement) parent;

-				if(statement.getNodeType() != SWITCH_CASE){

-					// case is added during #convertSwitchCase to keep order.

-					ss.statements().add(statement);

-				}

-				break;

-			case SWITCH_CASE:

-				// all statements on the switchcase goes into switch.

-				processingSwitchStatements.peek().statements().add(statement);

-				break;

-			case CATCH_CLAUSE:

-				CatchClause cc = (CatchClause)parent;

-				cc.setBody((Block)statement);

-				break;

-			case TRY_STATEMENT:

-				TryStatement ts = (TryStatement)parent;

-				if("block".equals(key)) //$NON-NLS-1$

-					ts.setBody((Block) statement);

-				else

-					ts.setFinally((Block) statement);

-				break;

-			case WHILE_STATEMENT:

-				WhileStatement whileS = (WhileStatement)parent;

-				whileS.setBody((Statement)statement);

-				break;

-			case DO_STATEMENT:

-				DoStatement ds = (DoStatement)parent;

-				ds.setBody((Statement)statement);

-				break;

-			case FOR_STATEMENT:

-				ForStatement fs = (ForStatement)parent;

-				fs.setBody((Statement) statement);

-				break;

-			case FOR_IN_STATEMENT:

-				ForInStatement fis = (ForInStatement)parent;

-				if("body".equals(key)) //$NON-NLS-1$

-					fis.setBody((Statement) statement);

-				break;

-			case FOR_OF_STATEMENT:

-				ForOfStatement fos = (ForOfStatement)parent;

-//				if("left".equals(key)) //$NON-NLS-1$

-////					fos.setIterationVariable((Statement) statement);

-////				else if("body".equals(key)) //$NON-NLS-1$

-////					fos.setBody((Statement) statement);

-				break;

-			case TYPE_DECLARATION:

-				TypeDeclaration typeDec = (TypeDeclaration) parent;

-				typeDec.bodyDeclarations().add(statement);

-				break;

-			case TYPE_DECLARATION_STATEMENT:

-			case TYPE_DECLARATION_EXPRESSION:

-				//TypeDeclaration is already assigned during convert.

-				break;

-			case EXPORT_DECLARATION:

-				ExportDeclaration edec = (ExportDeclaration) parent;

-				if("declaration".equals(key)) //$NON-NLS-1$

-					edec.setDeclaration(statement);

-				break;

-			default:

-				throw new UnimplementedException("Assigning "+statement + " to "+parent+ " is not handled"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$

-				}

-	}

-

-

-	private void assignVariableDeclarationToParent(VariableDeclaration declaration, ASTNode parent) {

-		switch(parent.getNodeType()){

-

-			case VARIABLE_DECLARATION_STATEMENT:

-				VariableDeclarationStatement vd = (VariableDeclarationStatement)parent;

-				vd.fragments().add(declaration);

-				break;

-			case FUNCTION_EXPRESSION:

-				FunctionExpression fe = (FunctionExpression)parent;

-				fe.getMethod().parameters().add((SingleVariableDeclaration)declaration);

-				break;

-			case VARIABLE_DECLARATION_EXPRESSION:

-				VariableDeclarationExpression ve = (VariableDeclarationExpression)parent;

-				ve.fragments().add(declaration);

-				break;

-			case FUNCTION_DECLARATION:

-				FunctionDeclaration fd = (FunctionDeclaration)parent;

-				fd.parameters().add(declaration);

-				break;

-			default:

-				throw new UnimplementedException("Assigning "+ declaration + " to "+parent+ " is not handled"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$

-		}

-

-	}

-

-	private void assignExpressionToParent(final Expression expression, final ASTNode parent, final String key ){

-

-		switch (parent.getNodeType()) {

-			case EXPRESSION_STATEMENT :

-				((ExpressionStatement)parent).setExpression(expression);

-				break;

-			case ASSIGNMENT:

-				if("left".equals(key)) //$NON-NLS-1$

-					((Assignment)parent).setLeftHandSide(expression);

-				else

-					((Assignment)parent).setRightHandSide(expression);

-				break;

-			case VARIABLE_DECLARATION_FRAGMENT:

-				if (expression.getNodeType() != SIMPLE_NAME)

-					((VariableDeclarationFragment) parent).setInitializer(expression);

-				else

-					((VariableDeclarationFragment) parent).setName((SimpleName) expression);

-				break;

-			case ARRAY_INITIALIZER:

-				((ArrayInitializer)parent).expressions().add(expression);

-				break;

-			case OBJECT_LITERAL:

-				((ObjectLiteral)parent).fields().add(expression);

-				break;

-			case OBJECT_LITERAL_FIELD:

-				ObjectLiteralField olf = (ObjectLiteralField)parent;

-				if("key".equals(key)) //$NON-NLS-1$

-					olf.setFieldName(expression);

-				else

-				if("value".equals(key)) //$NON-NLS-1$

-					olf.setInitializer(expression);

-				break;

-			case FUNCTION_EXPRESSION:

-				FunctionExpression fe = (FunctionExpression)parent;

-				if (!"params".equals(key)) //$NON-NLS-1$

-					fe.getMethod().setMethodName(expression);

-				else

-					fe.getMethod().parameters().add(wrapWithSingleVariableDeclaration(expression));

-				break;

-			case FUNCTION_DECLARATION_STATEMENT:

-				FunctionDeclarationStatement fdecS = (FunctionDeclarationStatement)parent;

-				if("params".equals(key)) //$NON-NLS-1$

-					fdecS.getDeclaration().parameters().add(wrapWithSingleVariableDeclaration(expression));

-				//value and key applies to  MethodDefiniton

-				if("value".equals(key)){ //$NON-NLS-1$

-					FunctionExpression fex = (FunctionExpression)expression;

-					fdecS.getDeclaration().setBody(((Block) ASTNode.copySubtree(ast, fex.getMethod().getBody())));

-				}

-				if("key".equals(key)) //$NON-NLS-1$

-					fdecS.getDeclaration().setMethodName(expression);

-				if("id".equals(key)) //$NON-NLS-1$

-					fdecS.getDeclaration().setMethodName(expression);

-				break;

-			case FUNCTION_DECLARATION:

-				FunctionDeclaration fdec = (FunctionDeclaration)parent;

-				if("params".equals(key)) //$NON-NLS-1$

-					fdec.parameters().add(wrapWithSingleVariableDeclaration(expression));

-				//value and key applies to  MethodDefiniton

-				if("value".equals(key)){ //$NON-NLS-1$

-					FunctionExpression fex = (FunctionExpression)expression;

-					fdec.setBody(((Block) ASTNode.copySubtree(ast, fex.getMethod().getBody())));

-				}

-				if("key".equals(key)) //$NON-NLS-1$

-					fdec.setMethodName(expression);

-				if("id".equals(key)) //$NON-NLS-1$

-					fdec.setMethodName(expression);

-				break;

-			case POSTFIX_EXPRESSION:

-				((PostfixExpression)parent).setOperand(expression);

-				break;

-			case PREFIX_EXPRESSION:

-				((PrefixExpression)parent).setOperand(expression);

-				break;

-			case INFIX_EXPRESSION:

-				if("left".equals(key)) //$NON-NLS-1$

-					((InfixExpression) parent).setLeftOperand(expression);

-				else

-					((InfixExpression) parent).setRightOperand(expression);

-				break;

-			case FIELD_ACCESS:

-				if("object".equals(key)) //$NON-NLS-1$

-					((FieldAccess)parent).setExpression(expression);

-				else

-					((FieldAccess)parent).setName((SimpleName)expression);

-				break;

-			case ARRAY_ACCESS:

-				if("object".equals(key)) //$NON-NLS-1$

-					((ArrayAccess)parent).setArray(expression);

-				else

-					((ArrayAccess)parent).setIndex(expression);

-				break;

-			case CONDITIONAL_EXPRESSION:

-				ConditionalExpression conditional = (ConditionalExpression)parent;

-				if("test".equals(key) ) //$NON-NLS-1$

-					conditional.setExpression(expression);

-				else if("consequent".equals(key)) //$NON-NLS-1$

-					conditional.setThenExpression(expression);

-				else

-					conditional.setElseExpression(expression);

-				

-				break;

-			case FUNCTION_INVOCATION:

-				FunctionInvocation fi = (FunctionInvocation)parent;

-				if("arguments".equals(key)) //$NON-NLS-1$

-					fi.arguments().add(expression);

-				else

-				if("callee".equals(key)) //$NON-NLS-1$

-					if (expression.getNodeType() != ASTNode.SIMPLE_NAME)

-						fi.setExpression(expression);

-					else

-						fi.setName((SimpleName) expression);

-				break;

-			case SUPER_METHOD_INVOCATION:

-				SuperMethodInvocation smi = (SuperMethodInvocation)parent;

-				if("arguments".equals(key)) //$NON-NLS-1$

-					smi.arguments().add(expression);

-				break;

-			case LIST_EXPRESSION:

-				((ListExpression)parent).expressions().add(expression);

-				break;

-			case YIELD_EXPRESSION:

-				((YieldExpression)parent).setArgument(expression);

-				break;

-			case CLASS_INSTANCE_CREATION:

-				ClassInstanceCreation ci = (ClassInstanceCreation)parent;

-				if("callee".equals(key)) //$NON-NLS-1$

-					ci.setMember(expression);

-				else

-					ci.arguments().add(expression);

-				break;

-			case ARROW_FUNCTION_EXPRESSION:

-				ArrowFunctionExpression af = (ArrowFunctionExpression)parent;

-				if (!"params".equals(key)) //$NON-NLS-1$

-					af.setExpression(expression);

-				else 

-					af.parameters().add(wrapWithSingleVariableDeclaration(expression));

-				break;

-			case WITH_STATEMENT:

-				WithStatement ws = (WithStatement)parent;

-				ws.setExpression(expression);

-				break;

-			case RETURN_STATEMENT:

-				ReturnStatement rs = (ReturnStatement)parent;

-				rs.setExpression(expression);

-				break;

-			case LABELED_STATEMENT:

-				LabeledStatement ls = (LabeledStatement)parent;

-				ls.setLabel((SimpleName)expression);

-				break;

-			case BREAK_STATEMENT:

-				BreakStatement bs = (BreakStatement)parent;

-				bs.setLabel((SimpleName)expression);

-				break;

-			case CONTINUE_STATEMENT:

-				ContinueStatement cs = (ContinueStatement)parent;

-				cs.setLabel((SimpleName)expression);

-				break;

-			case IF_STATEMENT:

-				IfStatement is = (IfStatement)parent;

-				is.setExpression(expression);

-				break;

-			case SWITCH_STATEMENT:

-				SwitchStatement ss = (SwitchStatement)parent;

-				ss.setExpression(expression);

-				break;

-			case SWITCH_CASE:

-				SwitchCase sc = (SwitchCase) parent;

-				if("test".equals(key)) //$NON-NLS-1$

-					sc.setExpression(expression);

-				break;

-			case THROW_STATEMENT:

-				ThrowStatement ts = (ThrowStatement)parent;

-				ts.setExpression(expression);

-				break;

-			case CATCH_CLAUSE:

-				CatchClause c =(CatchClause) parent;

-				SingleVariableDeclaration d = ast.newSingleVariableDeclaration();

-				d.setSourceRange(expression.getStartPosition(), expression.getLength());

-				d.setPattern((Name) expression);

-				c.setException(d);

-				break;

-			case WHILE_STATEMENT:

-				WhileStatement whileS = (WhileStatement)parent;

-				whileS.setExpression(expression);

-				break;

-			case DO_STATEMENT:

-				DoStatement ds = (DoStatement)parent;

-				ds.setExpression(expression);

-				break;

-			case FOR_STATEMENT:

-				ForStatement fs=(ForStatement)parent;

-				if("test".equals(key)) //$NON-NLS-1$

-					fs.setExpression(expression);

-				else if("init".equals(key)) //$NON-NLS-1$

-					fs.initializers().add(expression);

-				else if("update".equals(key)) //$NON-NLS-1$

-						fs.updaters().add(expression);

-				break;

-			case FOR_IN_STATEMENT:

-				ForInStatement fis = (ForInStatement)parent;

-				if("left".equals(key)) //$NON-NLS-1$

-					fis.setIterationVariable(expression);

-				else if("right".equals(key)) //$NON-NLS-1$

-					fis.setCollection(expression);

-				break;

-			case FOR_OF_STATEMENT:

-//				ForOfStatement fos = (ForOfStatement)parent;

-//				if("left".equals(key)) //$NON-NLS-1$

-//					fos.setIterationVariable(ast.newExpressionStatement(expression));

-//				else if("right".equals(key)) //$NON-NLS-1$

-//					fos.setCollection(expression);

-				break;

-			case TYPE_DECLARATION:

-				TypeDeclaration td = (TypeDeclaration) parent;

-				if("superClass".equals(key)) //$NON-NLS-1$

-					td.setSuperclassExpression(expression);

-				else if("id".equals(key)) //$NON-NLS-1$

-					td.setName((SimpleName) expression);

-				break;

-			case TYPE_DECLARATION_STATEMENT:

-				break;

-			case ARRAY_NAME:

-				ArrayName an = (ArrayName) parent;

-				an.elements().add(expression);

-				break;

-			case OBJECT_NAME:

-				ObjectName on = (ObjectName)parent;

-				on.objectProperties().add(expression);

-				break;

-			case TEMPLATE_LITERAL:

-				TemplateLiteral tl = (TemplateLiteral)parent;

-				if("expressions".equals(key)) //$NON-NLS-1$

-					tl.expressions().add(expression);

-				else

-				if("tag".equals(key)) //$NON-NLS-1$

-					tl.setTag(expression);

-				break;

-			case ASSIGNMENT_NAME:

-				AssignmentName asn = (AssignmentName)parent;

-				if("right".equals(key)) //$NON-NLS-1$

-					asn.setRight(expression);

-				else

-				if("left".equals(key)) //$NON-NLS-1$

-					asn.setLeft((Name) expression);

-				

-				break;

-			case REST_ELEMENT_NAME:

-				RestElementName ren = (RestElementName) parent;

-				if("argument".equals(key)) //$NON-NLS-1$

-					ren.setArgument(expression);

-				break;

-			case SPREAD_ELEMENT:

-				SpreadElement sel= (SpreadElement) parent;

-				if("argument".equals(key)) //$NON-NLS-1$

-					sel.setArgument(expression);

-				break;

-			case IMPORT_DECLARATION:

-				ImportDeclaration idec = (ImportDeclaration) parent;

-				idec.setSource((StringLiteral)expression);

-				break;

-			case MODULE_SPECIFIER:

-				ModuleSpecifier specifier = (ModuleSpecifier) parent;

-				if("local".equals(key)) //$NON-NLS-1$

-					specifier.setLocal((SimpleName) expression);

-				if("imported".equals(key)) //$NON-NLS-1$

-					specifier.setDiscoverableName((SimpleName) expression);

-				break;

-			case EXPORT_DECLARATION:

-				ExportDeclaration edec = (ExportDeclaration) parent;

-				if("source".equals(key)) //$NON-NLS-1$

-					edec.setSource((StringLiteral) expression);

-				break;

-			default :

-				throw new UnimplementedException("Assigning "+expression + " to "+parent+ " is not handled");//$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$

-		}

-	}

-

-	private SingleVariableDeclaration wrapWithSingleVariableDeclaration(final Expression expression) {

-		SingleVariableDeclaration $  = ast.newSingleVariableDeclaration();

-		$.setPattern((Name) expression);

-		$.setSourceRange(expression.getStartPosition(),expression.getLength());

-		return $;

-	}

-	

-	private JSdoc buildJSDoc(ScriptObjectMirror object){

-		if(!object.hasMember("leadingComments")) return null; //$NON-NLS-1$

-		Object commentObj = object.getMember("leadingComments"); //$NON-NLS-1$

-		if(ScriptObjectMirror.isUndefined(commentObj)) return null;

-		ScriptObjectMirror comments = (ScriptObjectMirror)commentObj;

-		Object[] arrayElements = comments.entrySet().toArray();

-		for (int i = 0 ;  i< arrayElements.length; ++i) {

-			Map.Entry<String, Object> entry = (java.util.Map.Entry<String, Object>) arrayElements[i];

-			Comment comment = EsprimaParser.createComment((ScriptObjectMirror) entry.getValue(), this.ast);

-			if(comment.isDocComment())

-				return (JSdoc) comment;

-		}

-		return null;

-	}

-

-	private void assignCatchToTry(ASTNode current, ASTNode parent) {

-		((TryStatement) parent).catchClauses().add(current);

-	}

-

-	private VisitOptions convertLiteral(final ScriptObjectMirror object) {

-		Object value = object.getMember("value"); //$NON-NLS-1$

-		String raw = (String)object.getMember("raw"); //$NON-NLS-1$

-		Expression literal = null;

-		if(value instanceof Number ){

-			literal = ast.newNumberLiteral(raw);

-		}else

-		if(value instanceof Boolean){

-			literal = ast.newBooleanLiteral(raw);

-		}else

-		if(value instanceof String){

-			literal = ast.newStringLiteral();

-			((StringLiteral) literal).setEscapedValue(raw);

-		}else

-		if(object.hasMember("regex")){ //$NON-NLS-1$

-			literal = ast.newRegularExpressionLiteral(raw);

-		}else

-		if(value == null ){

-			literal = ast.newNullLiteral();

-		}

-

-		if(literal == null ){

-			throw new UnimplementedException("Failed to translate Literal " + value); //$NON-NLS-1$

-		}

-		else{

-			nodes.push(literal);

-		}

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertProgram(final ScriptObjectMirror object){

-		nodes.push(root);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertVariableDeclaration(final ScriptObjectMirror object) {

-		String kind = (String) object.getMember("kind"); //$NON-NLS-1$

-		VariableKind variableKind = VariableKind.VAR;

-		if(kind.equals("let")) //$NON-NLS-1$

-			variableKind = VariableKind.LET;

-		else if(kind.equals("const")) //$NON-NLS-1$

-			variableKind = VariableKind.CONST;

-		

-		int parentType = nodes.peek().getNodeType();

-		if(parentType == FOR_STATEMENT ){// For statements use expression

-			final VariableDeclarationExpression e = ast.newVariableDeclarationExpression();

-			e.setKind(variableKind);

-			nodes.push(e);

-		}else{

-			final VariableDeclarationStatement e = ast.newVariableDeclarationStatement();

-			e.setJavadoc(buildJSDoc(object));

-			e.setKind(variableKind);

-			nodes.push(e);

-		}

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertVariableDeclarator(final ScriptObjectMirror object) {

-		final VariableDeclarationFragment f  = ast.newVariableDeclarationFragment();

-		nodes.push(f);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertIdentifier(final ScriptObjectMirror object) {

-		final String s = (String)object.getMember("name"); //$NON-NLS-1$

-		SimpleName name = ast.newSimpleName(s);

-		nodes.push(name);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertExpressionStatement(final ScriptObjectMirror object) {

-		final ExpressionStatement es = ast.newExpressionStatement();

-		nodes.push(es);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertAssignmentExpression(final ScriptObjectMirror object) {

-		final Assignment a = ast.newAssignment();

-		final String op = (String) object.getMember("operator"); //$NON-NLS-1$

-		a.setOperator(Assignment.Operator.toOperator(op));

-		nodes.push(a);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertThisExpression(final ScriptObjectMirror object) {

-		final ThisExpression t = ast.newThisExpression();

-		nodes.push(t);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertArrayExpression(final ScriptObjectMirror object) {

-		ArrayInitializer ai = ast.newArrayInitializer();

-		nodes.push(ai);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertObjectExpression(final ScriptObjectMirror object) {

-		ObjectLiteral o = ast.newObjectLiteral();

-		nodes.push(o);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertPropertyExpression(final ScriptObjectMirror object) {

-		ObjectLiteralField of = ast.newObjectLiteralField();

-		String kind = (String) object.getMember("kind"); //$NON-NLS-1$

-		FieldKind k = null;

-		if("init".equals(kind)) //$NON-NLS-1$

-			k = FieldKind.INIT;

-		else if("get".equals(kind)) //$NON-NLS-1$

-			k = FieldKind.GET;

-		else if("set".equals(kind)) //$NON-NLS-1$

-			k = FieldKind.SET;

-		

-		of.setKind(k);

-		nodes.push(of);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertFunctionExpression(final ScriptObjectMirror object) {

-		// We break from the usual pattern and create a functionDeclaration.

-		// has a single object type for function expression while DOM AST

-		// needs two objects for the same result. All further assignments needs

-		// to handle this properly

-		FunctionExpression fe = ast.newFunctionExpression();

-		FunctionDeclaration d = ast.newFunctionDeclaration();

-		Boolean isGenerator = (Boolean)object.getMember("generator"); //$NON-NLS-1$

-		d.setGenerator(isGenerator.booleanValue());

-		fe.setMethod(d);

-		nodes.add(fe);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertFunctionDeclaration(final ScriptObjectMirror object) {

-		FunctionDeclaration dec = ast.newFunctionDeclaration();

-		Boolean isGenerator = (Boolean)object.getMember("generator"); //$NON-NLS-1$

-		dec.setGenerator(isGenerator.booleanValue());

-		dec.setJavadoc(buildJSDoc(object));

-		int parentType = nodes.peek().getNodeType();

-		nodes.push(parentType == ASTNode.EXPORT_DECLARATION ||

-					parentType == ASTNode.TYPE_DECLARATION || 

-					parentType == ASTNode.JAVASCRIPT_UNIT ? dec : ast.newFunctionDeclarationStatement(dec));

-		

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertUnaryOperation(final ScriptObjectMirror object) {

-		final Boolean isPrefix = (Boolean) object.getMember("prefix"); //$NON-NLS-1$

-		final String operator = (String) object.getMember("operator"); //$NON-NLS-1$

-		if(isPrefix){

-			PrefixExpression pe= ast.newPrefixExpression();

-			pe.setOperator( PrefixExpression.Operator.toOperator(operator));

-			nodes.push(pe);

-		}else{

-			PostfixExpression po = ast.newPostfixExpression();

-			po.setOperator( PostfixExpression.Operator.toOperator(operator));

-			nodes.push(po);

-		}

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertBinaryExpression(final ScriptObjectMirror object) {

-		final String operator = (String) object.getMember("operator"); //$NON-NLS-1$

-		InfixExpression ie = ast.newInfixExpression();

-		ie.setOperator(InfixExpression.Operator.toOperator(operator));

-		nodes.push(ie);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertMemberExpression(final ScriptObjectMirror object) {

-		Boolean computed = (Boolean)object.getMember("computed"); //$NON-NLS-1$

-		nodes.push(computed ? ast.newArrayAccess() : ast.newFieldAccess());

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertConditionalExpression(final ScriptObjectMirror object) {

-		ConditionalExpression ce = ast.newConditionalExpression();

-		nodes.push(ce);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertCallExpression(final ScriptObjectMirror object) {

-		ScriptObjectMirror callee = (ScriptObjectMirror) object.getMember("callee"); //$NON-NLS-1$

-		String type = (String) callee.getMember("type"); //$NON-NLS-1$

-		if("Super".equals(type)){ //$NON-NLS-1$

-			SuperMethodInvocation smi = ast.newSuperMethodInvocation();

-			nodes.push(smi);

-		}else{

-			FunctionInvocation fi = ast.newFunctionInvocation();

-			nodes.push(fi);

-		}

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertSequenceExpression(final ScriptObjectMirror object) {

-		ListExpression le = ast.newListExpression();

-		nodes.push(le);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertYieldExpression(final ScriptObjectMirror object) {

-		Boolean isDelegate = (Boolean)object.getMember("delegate"); //$NON-NLS-1$

-		YieldExpression ye = ast.newYieldExpression();

-		ye.setDelegate(isDelegate);

-		nodes.push(ye);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertNewExpression(final ScriptObjectMirror object) {

-		ClassInstanceCreation ci = ast.newClassInstanceCreation();

-		nodes.push(ci);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertArrowFunctionExpression(final ScriptObjectMirror object) {

-		ArrowFunctionExpression af = ast.newArrowFunctionExpression();

-		nodes.push(af);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertBlockStatement(final ScriptObjectMirror object) {

-		Block b = ast.newBlock();

-		nodes.push(b);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertEmptyStatement(final ScriptObjectMirror object) {

-		EmptyStatement es = ast.newEmptyStatement();

-		nodes.push(es);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertDebuggerStatememt(final ScriptObjectMirror object) {

-		DebuggerStatement ds = ast.newDebuggerStatement();

-		nodes.push(ds);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertWithStatement(final ScriptObjectMirror object) {

-		WithStatement ws = ast.newWithStatement();

-		nodes.push(ws);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertReturnStatement(final ScriptObjectMirror object) {

-		ReturnStatement rs = ast.newReturnStatement();

-		nodes.push(rs);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions converLabeledStatement(final ScriptObjectMirror object) {

-		LabeledStatement ls = ast.newLabeledStatement();

-		nodes.push(ls);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertBreakStatement(final ScriptObjectMirror object) {

-		BreakStatement bs = ast.newBreakStatement();

-		nodes.push(bs);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertContinueStatement(final ScriptObjectMirror object) {

-		ContinueStatement cs = ast.newContinueStatement();

-		nodes.push(cs);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertIfStatement(final ScriptObjectMirror object) {

-		IfStatement is = ast.newIfStatement();

-		nodes.push(is);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertSwitchStatement(final ScriptObjectMirror object) {

-		SwitchStatement ss = ast.newSwitchStatement();

-		this.processingSwitchStatements.push(ss);

-		nodes.push(ss);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertSwitchCaseStatement(final ScriptObjectMirror object) {

-		SwitchCase sc = ast.newSwitchCase();

-		//set it to default:

-		sc.setExpression(null);

-		nodes.push(sc);

-		if(processingSwitchStatements.empty() )

-			throw new IllegalStateException("Case statement without a switch"); //$NON-NLS-1$

-		//add the case to switch statement here so that the order is correct

-		processingSwitchStatements.peek().statements().add(sc);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertThrowStatement(final ScriptObjectMirror object) {

-		ThrowStatement ts = ast.newThrowStatement();

-		nodes.push(ts);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertCatchClause(final ScriptObjectMirror object) {

-		CatchClause cc = ast.newCatchClause();

-		nodes.push(cc);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertTryStatement(final ScriptObjectMirror object) {

-		TryStatement ts = ast.newTryStatement();

-		nodes.push(ts);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertWhileStatement(final ScriptObjectMirror object) {

-		WhileStatement ws = ast.newWhileStatement();

-		nodes.push(ws);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertDoWhileStatement(final ScriptObjectMirror object) {

-		DoStatement ds = ast.newDoStatement();

-		nodes.push(ds);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertForStatement(final ScriptObjectMirror object) {

-		ForStatement fs = ast.newForStatement();

-		nodes.push(fs);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertForInStatement(final ScriptObjectMirror object) {

-		ForInStatement fi = ast.newForInStatement();

-		nodes.push(fi);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertForOfStatement(final ScriptObjectMirror object) {

-		ForOfStatement fo = ast.newForOfStatement();

-		nodes.push(fo);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertClassDeclaration(final ScriptObjectMirror object) {

-		AbstractTypeDeclaration td = ast.newTypeDeclaration();

-		TypeDeclarationStatement tds = ast.newTypeDeclarationStatement(td);

-		nodes.push(tds);

-		nodes.push(td);

-		return VisitOptions.CONTINUE;

-	}

-

-

-	/**

-	 * @param object

-	 * @return

-	 */

-	private VisitOptions convertClassExpression(ScriptObjectMirror object) {

-		AbstractTypeDeclaration td = ast.newTypeDeclaration();

-		TypeDeclarationExpression tde = ast.newTypeDeclarationExpression(td);

-		nodes.push(tde);

-		nodes.push(td);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertMethodDefinition(final ScriptObjectMirror object) {

-		FunctionDeclaration fd = ast.newFunctionDeclaration();

-		Boolean isStatic = (Boolean)object.getMember("static"); //$NON-NLS-1$

-		if(isStatic){

-			Modifier staticModifier = ast.newModifier(ModifierKeyword.STATIC_KEYWORD);

-			fd.modifiers().add(staticModifier);

-		}

-		String kind = (String)object.getMember("kind"); //$NON-NLS-1$

-		if(!"method".equals(kind)){ //$NON-NLS-1$

-			if("constructor".equals(kind)){ //$NON-NLS-1$

-				fd.setConstructor(true);

-			}else if("get".equals(kind)){ //$NON-NLS-1$

-				Modifier getModifier = ast.newModifier(ModifierKeyword.GET_KEYWORD);

-				fd.modifiers().add(getModifier);

-			}else if("set".equals(kind)){ //$NON-NLS-1$

-				Modifier setModifier = ast.newModifier(ModifierKeyword.SET_KEYWORD);

-				fd.modifiers().add(setModifier);

-			}

-		}

-		nodes.push(fd);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertRestElement(final ScriptObjectMirror object) {

-		RestElementName ren = ast.newRestElementName();

-		nodes.push(ren);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertArrayPattern(final ScriptObjectMirror object) {

-		ArrayName an = ast.newArrayName();

-		nodes.push(an);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertObjectPattern(final ScriptObjectMirror object) {

-		ObjectName on = ast.newObjectName();

-		nodes.push(on);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertTemplateLiteral(final ScriptObjectMirror object, String key) {

-		if("quasi".equals(key)){ //$NON-NLS-1$

-			// reuse the tempalateLiteral created with parent TaggedTemplateLiteral so

-			//that it eventually cascades to one TemplateLiteral

-			nodes.push(nodes.peek());

-			return VisitOptions.CONTINUE;

-		}

-		TemplateLiteral literal = ast.newTemplateLiteral();

-		nodes.push(literal);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertTemplateElement(final ScriptObjectMirror object) {

-		TemplateElement te = ast.newTemplateElement();

-		ScriptObjectMirror val = (ScriptObjectMirror)object.getMember("value"); //$NON-NLS-1$

-		String value = (String)val.getMember("raw"); //$NON-NLS-1$

-		Boolean isTail = (Boolean) object.getMember("tail"); //$NON-NLS-1$

-		te.setRawValue(value);

-		te.setTail(isTail.booleanValue());

-		nodes.push(te);

-		return VisitOptions.SKIP;

-	}

-

-	private VisitOptions convertAssignmentPattern(final ScriptObjectMirror object) {

-		AssignmentName an = ast.newAssignmentName();

-		nodes.push(an);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertSpreadElement(final ScriptObjectMirror object) {

-		SpreadElement spread = ast.newSpreadElement();

-		nodes.push(spread);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertMetaProperty(final ScriptObjectMirror object) {

-		MetaProperty mp = ast.newMetaProperty();

-		String meta = (String) object.getMember("meta"); //$NON-NLS-1$

-		String prop = (String) object.getMember("property"); //$NON-NLS-1$

-		mp.setMeta(meta);

-		mp.setPropertyName(prop);

-		nodes.push(mp);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertImportDeclaration(final ScriptObjectMirror object) {

-		ImportDeclaration importDecl = ast.newImportDeclaration();

-		nodes.push(importDecl);

-		return VisitOptions.CONTINUE;

-	}

-

-

-	private VisitOptions convertImportSpecifer(ScriptObjectMirror object, boolean isDefault, boolean isNamespace) {

-		ModuleSpecifier specifier = ast.newModuleSpecifier();

-		specifier.setDefault(isDefault);

-		specifier.setNamespace(isNamespace);

-		nodes.push(specifier);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertExportSpecifier(ScriptObjectMirror object) {

-		ModuleSpecifier specifier = ast.newModuleSpecifier();

-		nodes.push(specifier);

-		return VisitOptions.CONTINUE;

-	}

-

-	private VisitOptions convertExportDeclaration(ScriptObjectMirror object, boolean isDefault, boolean isAll) {

-		ExportDeclaration declaration = ast.newExportDeclaration();

-		declaration.setDefault(isDefault);

-		declaration.setAll(isAll);

-		nodes.push(declaration);

-		return VisitOptions.CONTINUE;

-	}

-}

diff --git a/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/ESTreeNodeTypes.java b/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/ESTreeNodeTypes.java
deleted file mode 100644
index 4b3d480bf..000000000
--- a/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/ESTreeNodeTypes.java
+++ /dev/null
@@ -1,105 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2015, 2016 Red Hat, Inc.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Eclipse Public License v1.0
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/epl-v10.html
- *
- * 	Contributors:
- * 		 Red Hat Inc. - initial API and implementation and/or initial documentation
- *******************************************************************************/
-package org.eclipse.wst.jsdt.internal.esprima;
-
-/**
- * @author Gorkem Ercan
- * @since 2.0
- *
- */
-@SuppressWarnings("nls")
-public enum ESTreeNodeTypes {
-
-	AssignmentExpression("AssignmentExpression", "left","right"),
-	AssignmentPattern("AssignmentPattern", "left", "right"),
-	ArrayExpression("ArrayExpression", "elements"),
-    ArrayPattern("ArrayPattern", "elements"),
-    ArrowFunctionExpression("ArrowFunctionExpression","params", "body"),
-    AwaitExpression("AwaitExpression","argument"), //  ES7.
-    BlockStatement("BlockStatement", "body"),
-    BinaryExpression("BinaryExpression","left", "right"),
-    BreakStatement("BreakStatement", "label"),
-    CallExpression("CallExpression", "callee", "arguments"),
-    CatchClause("CatchClause", "param", "body"),
-    ClassBody("ClassBody", "body"),
-    ClassDeclaration("ClassDeclaration","id", "superClass", "body"),
-    ClassExpression("ClassExpression", "id", "superClass", "body"),
-//    ComprehensionBlock("ComprehensionBlock", "left", "right"),  // ES7.
-//    ComprehensionExpression("ComprehensionExpression", "blocks", "filter", "body"),  // ES7.
-    ConditionalExpression("ConditionalExpression", "test", "consequent", "alternate"),
-    ContinueStatement("ContinueStatement", "label"),
-    DebuggerStatement("DebuggerStatement"),
-    DirectiveStatement("DirectiveStatement"),
-    DoWhileStatement("DoWhileStatement", "body", "test"),
-    EmptyStatement("EmptyStatement"),
-    ExportAllDeclaration("ExportAllDeclaration", "source"),
-    ExportDefaultDeclaration("ExportDefaultDeclaration", "declaration"),
-    ExportNamedDeclaration("ExportNamedDeclaration", "declaration", "specifiers", "source"),
-    ExportSpecifier("ExportSpecifier", "exported", "local"),
-    ExpressionStatement("ExpressionStatement", "expression"),
-    ForStatement("ForStatement", "init", "test", "update", "body"),
-    ForInStatement("ForInStatement", "left", "right", "body"),
-    ForOfStatement("ForOfStatement","left", "right", "body"),
-    FunctionDeclaration("FunctionDeclaration", "id", "params", "body"),
-    FunctionExpression("FunctionExpression", "id", "params", "body"),
-   // GeneratorExpression("GeneratorExpression", "blocks", "filter", "body"),  // ES7.
-    Identifier("Identifier"),
-	IfStatement("IfStatement", "test", "consequent", "alternate"),
-	ImportDeclaration("ImportDeclaration", "specifiers", "source"),
-	ImportDefaultSpecifier("ImportDefaultSpecifier", "local"),
-	ImportNamespaceSpecifier("ImportNamespaceSpecifier", "local"),
-	ImportSpecifier("ImportSpecifier", "imported", "local"),
-	Literal("Literal"),
-	LabeledStatement("LabeledStatement", "label", "body"),
-	LogicalExpression("LogicalExpression", "left", "right"),
-	MemberExpression("MemberExpression", "object", "property"),
-	MetaProperty("MetaProperty", "meta", "property"),
-	MethodDefinition("MethodDefinition", "key", "value"),
-	ModuleSpecifier("ModuleSpecifier"),
-	NewExpression("NewExpression", "callee", "arguments"),
-	ObjectExpression("ObjectExpression", "properties"),
-	ObjectPattern("ObjectPattern", "properties"),
-	Program("Program", "body"),
-	Property("Property", "key", "value"),
-	RestElement("RestElement", "argument"),
-	ReturnStatement("ReturnStatement", "argument"),
-	SequenceExpression("SequenceExpression", "expressions"),
-	SpreadElement("SpreadElement", "argument"),
-	Super("Super"),
-	SwitchStatement("SwitchStatement", "discriminant", "cases"),
-	SwitchCase("SwitchCase", "test", "consequent"),
-	TaggedTemplateExpression("TaggedTemplateExpression", "tag", "quasi"),
-	TemplateElement("TemplateElement"),
-	TemplateLiteral("TemplateLiteral", "quasis", "expressions"),
-	ThisExpression("ThisExpression"),
-	ThrowStatement("ThrowStatement", "argument"),
-	TryStatement("TryStatement", "block", "handler", "finalizer"),
-	UnaryExpression("UnaryExpression", "argument"),
-	UpdateExpression("UpdateExpression", "argument"),
-	VariableDeclaration("VariableDeclaration", "declarations"),
-	VariableDeclarator("VariableDeclarator", "id", "init"),
-	WhileStatement("WhileStatement", "test", "body"),
-    WithStatement("WithStatement", "object", "body"),
-    YieldExpression("YieldExpression", "argument");
-
-	private final	String typeString;
-	private final String[] visitorKeys;
-	ESTreeNodeTypes(String type, String... visitorKeys){
-		this.typeString = type;
-		this.visitorKeys = visitorKeys;
-	}
-	public String getTypeString() {
-		return typeString;
-	}
-	public String[] getVisitorKeys() {
-		return visitorKeys;
-	}
-}
diff --git a/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/EStreeVisitor.java b/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/EStreeVisitor.java
deleted file mode 100644
index 8d4636d0d..000000000
--- a/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/EStreeVisitor.java
+++ /dev/null
@@ -1,126 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2015, 2016 Red Hat, Inc. 
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Eclipse Public License v1.0
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/epl-v10.html
- *
- * 	Contributors:
- * 		 Red Hat Inc. - initial API and implementation and/or initial documentation
- *******************************************************************************/
-package org.eclipse.wst.jsdt.internal.esprima;
-
-import java.util.Map;
-import java.util.Stack;
-
-import org.eclipse.core.runtime.Assert;
-
-import jdk.nashorn.api.scripting.ScriptObjectMirror;
-
-/**
- * @author Gorkem Ercan
- * @since 2.0
- */
-public class EStreeVisitor {
-
-	public enum VisitOptions{
-		/**
-		 * Traverse children
-		 */
-		CONTINUE,
-		/**
-		 * Skip children
-		 */
-		SKIP,
-		/**
-		 * Break traversal
-		 */
-		BREAK }
-
-	class WorkElement{
-
-		ScriptObjectMirror node;
-		boolean endVisit;
-		String key;
-
-		/**
-		 *
-		 */
-		public WorkElement(ScriptObjectMirror node,String key, boolean endVisit) {
-			this.node = node;
-			this.key = key;
-			this.endVisit = endVisit;
-		}
-	}
-
-	final private Stack<WorkElement> workStack = new Stack<WorkElement>();
-
-	public void traverse(ScriptObjectMirror root) {
-		workStack.push(new WorkElement(root,null, false));
-
-		while (!workStack.empty()) {
-			WorkElement element = workStack.pop();
-			VisitOptions vo = callVisit(element);
-			if (vo == VisitOptions.BREAK) {
-				return;
-			}
-			// No breaks push endVisit to stack
-			if (!element.endVisit)
-				workStack.push(new WorkElement(element.node, element.key, true));
-
-			if (element.endVisit || vo == VisitOptions.SKIP) { // skip children
-				continue;
-			}
-
-			// Find children and add them to worklist
-			ESTreeNodeTypes nodeType = getNodeType(element);
-			Assert.isNotNull(nodeType);
-			String[] keys = nodeType.getVisitorKeys();
-			for (int i = keys.length - 1; i > -1; i--) {
-				Object o = element.node.getMember(keys[i]);
-				if (o instanceof ScriptObjectMirror) {
-					ScriptObjectMirror candidate = (ScriptObjectMirror) o;
-					if (candidate.isArray()) {
-						// Create WorkElements for Array in reverse order
-						// to keep the order coming out of stack
-						Object[] arrayElements = candidate.entrySet().toArray();
-						for (int j = arrayElements.length-1; j > -1; j--) {
-							Map.Entry<String, Object> entry = (java.util.Map.Entry<String, Object>) arrayElements[j];
-							Object result = entry.getValue();
-							if (result instanceof ScriptObjectMirror) {
-								workStack.push(new WorkElement((ScriptObjectMirror) result, keys[i] ,false));
-							}
-						}
-					}
-					else {
-						workStack.push(new WorkElement(candidate, keys[i], false));
-					}
-				}
-			}
-		}
-	}
-
-	private VisitOptions callVisit(WorkElement element){
-		ESTreeNodeTypes nodeType = getNodeType(element);
-		Assert.isNotNull(nodeType);
-		if(element.endVisit){
-			return endVisit(element.node, nodeType, element.key);
-		}
-		return visit(element.node, nodeType, element.key);
-	}
-
-	private ESTreeNodeTypes getNodeType(WorkElement element) {
-		String type = (String)element.node.get("type");
-		ESTreeNodeTypes nodeType = ESTreeNodeTypes.valueOf(type);
-		return nodeType;
-	}
-
-	public VisitOptions visit(ScriptObjectMirror object, ESTreeNodeTypes nodeType, String key){
-		return VisitOptions.CONTINUE;
-	}
-
-	public VisitOptions endVisit(ScriptObjectMirror object, ESTreeNodeTypes nodeType, String key){
-		return VisitOptions.CONTINUE;
-	}
-
-}
diff --git a/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/EsprimaParser.java b/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/EsprimaParser.java
deleted file mode 100644
index 690a67a13..000000000
--- a/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/EsprimaParser.java
+++ /dev/null
@@ -1,323 +0,0 @@
-/*******************************************************************************
- * Copyright (c) 2016 Red Hat, Inc.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Eclipse Public License v1.0
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/epl-v10.html
- *
- * 	Contributors:
- * 		 Red Hat Inc. - initial API and implementation and/or initial documentation
- *******************************************************************************/
-package org.eclipse.wst.jsdt.internal.esprima;
-
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.util.HashMap;
-
-import javax.script.Bindings;
-import javax.script.Compilable;
-import javax.script.CompiledScript;
-import javax.script.ScriptEngine;
-import javax.script.ScriptEngineManager;
-import javax.script.ScriptException;
-
-import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
-import org.eclipse.wst.jsdt.core.JavaScriptModelException;
-import org.eclipse.wst.jsdt.core.dom.AST;
-import org.eclipse.wst.jsdt.core.dom.ASTNode;
-import org.eclipse.wst.jsdt.core.dom.Comment;
-import org.eclipse.wst.jsdt.core.dom.JSdoc;
-import org.eclipse.wst.jsdt.core.dom.JavaScriptUnit;
-import org.eclipse.wst.jsdt.internal.compiler.problem.DefaultProblem;
-import org.eclipse.wst.jsdt.internal.compiler.problem.ProblemSeverities;
-import org.eclipse.wst.jsdt.internal.core.CompilationUnit;
-
-import jdk.nashorn.api.scripting.ScriptObjectMirror;
-import jdk.nashorn.internal.runtime.ECMAException;
-
-/**
- * A wrapper around EsprimaParser that uses nashorn to execute the parser.
- *
- * @author Gorkem Ercan
- * @since 2.0
- */
-class EsprimaParser {
-	/**
-	 * "attachComment" option for parser
-	 */
-	private static final String ESPRIMA_OPT_ATTACH_COMMENT = "attachComment"; //$NON-NLS-1$
-
-	/**
-	 * "range" option for parser
-	 */
-	private static final String ESPRIMA_OPT_RANGE = "range"; //$NON-NLS-1$
-
-	/**
-	 * "tolerant" option for esprima
-	 */
-	private static final String ESPRIMA_OPT_TOLERANT = "tolerant"; //$NON-NLS-1$
-	
-	/**
-	 * "sourceType" option for esprima
-	 */
-	private static final String ESPRIMA_OPT_SOURCE_TYPE = "sourceType"; //$NON-NLS-1$
-
-	private static ScriptEngine engine;
-	private static CompiledScript compiledEsprima;
-	private Bindings bindings;
-	private String rawContent;
-	private IJavaScriptUnit unit;
-
-	private boolean tolerant = Boolean.TRUE;
-	private boolean range = Boolean.TRUE;
-	private boolean errorReporting = Boolean.TRUE;
-	private boolean includeJsdocs = Boolean.FALSE;
-	private String sourceType;
-
-	/**
-	 *
-	 */
-	private EsprimaParser() {
-		this.bindings = engine.createBindings();		
-		try {
-			compiledEsprima.eval(this.bindings);
-		}
-		catch (ScriptException e) {
-			// TODO Auto-generated catch block
-			e.printStackTrace();
-		}
-	}
-
-	public static EsprimaParser newParser() {
-		final ScriptEngineManager manager = new ScriptEngineManager();
-		synchronized (EsprimaParser.class) {
-			if (engine == null) {
-				engine = manager.getEngineByName("nashorn"); //$NON-NLS-1$
-				Compilable compilable = (Compilable) engine;
-				try {
-					InputStream in = EsprimaParser.class.getResourceAsStream("esprima.js"); //$NON-NLS-1$
-					if (in == null)
-						throw new RuntimeException("Failed to load esprima.js file"); //$NON-NLS-1$
-					compiledEsprima = compilable.compile(new InputStreamReader(in));
-				}
-				catch (ScriptException e) {
-					// TODO Auto-generated catch block
-					e.printStackTrace();
-				}
-			}
-		}
-		return new EsprimaParser();
-	}
-
-
-	public EsprimaParser setSource(String content){
-		this.unit = null;
-		this.rawContent = content;
-		return this;
-	}
-
-	public EsprimaParser setSource(IJavaScriptUnit content){
-		this.rawContent = null;
-		this.unit = content;
-		return this;
-	}
-
-	public JavaScriptUnit parse() {
-		String content = rawContent;
-		if(unit != null )
-			try {
-				content = unit.getSource();
-			}
-			catch (JavaScriptModelException e) {
-				e.printStackTrace();
-			}
-		AST ast = AST.newAST(AST.JLS3);
-		ast.setDefaultNodeFlag(ASTNode.ORIGINAL);
-		JavaScriptUnit $ = ast.newJavaScriptUnit();
-		try{
-			ScriptObjectMirror jsObject = internalParse(content);
-			translate(jsObject,$);
-			buildLineEndTable($, content);
-			if(errorReporting && tolerant)
-				reportErrors(jsObject, $);
-			if(includeJsdocs)
-				buildComments(jsObject, $, ast);
-			ast.setDefaultNodeFlag(0);
-		}catch(ECMAException e)
-		{
-			if(!(e.getEcmaError() instanceof ScriptObjectMirror))
-				e.printStackTrace();
-			$.setProblems(new DefaultProblem[]{createProblem(((ScriptObjectMirror) e.getEcmaError()))});
-			$.setFlags(ASTNode.MALFORMED);
-		}
-		return $;
-	}
-
-	/**
-	 * Sets the tolerant parsing option to false.
-	 * The default value for tolerant is true.
-	 *
-	 * @return parser
-	 */
-	public EsprimaParser noTolerantParsing(){
-		this.tolerant = false;
-		return this;
-	}
-
-	/**
-	 * Sets the range based location option to false.
-	 * The default is true;
-	 *
-	 * @return parser
-	 */
-	public EsprimaParser noRangeLocationInfo(){
-		this.range = false;
-		return this;
-	}
-
-	/**
-	 * Turns the error reporting off causing the return JavaScriptUnit
-	 * not to include the errors.
-	 *
-	 * @return
-	 */
-	public EsprimaParser noErrorReporting(){
-		this.errorReporting = false;
-		return this;
-	}
-
-	public EsprimaParser includeComments(){
-		this.includeJsdocs = true;
-		return this;
-	}
-	
-	public EsprimaParser setSourceType(String value) {
-		this.sourceType = value;
-		return this;
-	}
-
-	/**
-	 * @param jsObject
-	 * @return
-	 */
-	private JavaScriptUnit translate(final ScriptObjectMirror jsObject, final JavaScriptUnit jsunit) {
-		return (new DOMASTConverter(jsunit)).convert(jsObject);
-	}
-
-	private ScriptObjectMirror internalParse(String content) {
-		final ScriptObjectMirror esprima = (ScriptObjectMirror) this.bindings.get("esprima"); //$NON-NLS-1$
-		if (esprima == null)
-			throw new RuntimeException("Esprima parser was not loaded correctly"); //$NON-NLS-1$
-		return (ScriptObjectMirror) esprima.callMember("parse", content, getOptions()); //$NON-NLS-1$
-	}
-
-	private HashMap<String, Object> getOptions() {	
-		HashMap<String, Object> $ = new HashMap<String, Object>();
-		$.put(ESPRIMA_OPT_RANGE, range);
-		$.put(ESPRIMA_OPT_TOLERANT, tolerant);
-		$.put(ESPRIMA_OPT_ATTACH_COMMENT, includeJsdocs);
-		if(sourceType != null)
-			$.put(ESPRIMA_OPT_SOURCE_TYPE, sourceType);
-		return $;
-	}
-
-	/**
-	 * Add the errors reported on the "errors" array to
-	 * result.
-	 *
-	 * @param jsObject
-	 * @param result
-	 */
-	private void reportErrors(final ScriptObjectMirror jsObject, final JavaScriptUnit result) {
-		ScriptObjectMirror errors = (ScriptObjectMirror) jsObject.getMember("errors"); //$NON-NLS-1$
-		if(errors == null || errors.size() < 1) return;
-		DefaultProblem[] problems = new DefaultProblem[errors.size()];
-		for(int i = 0; i < errors.size(); ++i)
-			problems[i] = createProblem(((ScriptObjectMirror) errors.getSlot(i)));
-		result.setFlags(ASTNode.MALFORMED);
-		result.setProblems(problems);
-	}
-
-	private DefaultProblem createProblem(final ScriptObjectMirror error){
-		String description = (String) error.getMember("description"); //$NON-NLS-1$
-		Number index = (Number) error.getMember("index"); //$NON-NLS-1$
-		Number line = (Number) error.getMember("lineNumber"); //$NON-NLS-1$
-		Number column = (Number) error.getMember("column"); //$NON-NLS-1$
-
-		char[] fileName = null;
-		if(unit != null){
-			CompilationUnit cu = (CompilationUnit)unit;
-			fileName = cu.getFileName();
-		}
-
-		DefaultProblem result = new DefaultProblem(fileName,
-					description,
-					0,
-					null,
-					ProblemSeverities.Error,
-					index.intValue(),
-					-1,
-					line.intValue(),
-					column.intValue());
-		return result;
-	}
-
-	/**
-	 * @param jsObject
-	 * @param result
-	 */
-	private void buildComments(ScriptObjectMirror jsObject, JavaScriptUnit result, AST t) {
-		ScriptObjectMirror comments = (ScriptObjectMirror) jsObject.getMember("comments"); //$NON-NLS-1$
-
-		int commentSize = comments.size();
-		Comment[] resultComments = new Comment[commentSize];
-		for(int i = 0; i< commentSize; ++i){
-			ScriptObjectMirror obj = (ScriptObjectMirror) comments.getSlot(i);
-			Comment newComment = createComment(obj, t);
-			newComment.setAlternateRoot(result);
-			resultComments[i] = newComment;
-		}
-		result.setCommentTable(resultComments);
-	}
-
-	/**
-	 * @param m
-	 * @return
-	 */
-	static Comment createComment(ScriptObjectMirror m, AST t) {
-		String type = (String) m.getMember("type"); //$NON-NLS-1$
-		String value = (String) m.getMember("value"); //$NON-NLS-1$
-		Comment $ = "Line".equals(type) ? t.newLineComment() : !value.startsWith("*") ? t.newBlockComment() : t.newJSdoc();  //$NON-NLS-1$//$NON-NLS-2$
-		if($.isDocComment()) ((JSdoc)$).setComment("/*"+value+"*/");  //$NON-NLS-1$//$NON-NLS-2$
-		ScriptObjectMirror r = (ScriptObjectMirror) m.getMember("range"); //$NON-NLS-1$
-		Number x = (Number) r.getSlot(0);
-		Number y = (Number) r.getSlot(1);
-		$.setSourceRange(x.intValue(), y.intValue()-x.intValue());
-		return $;
-	}
-
-	/**
-	 * Calculates line ends for the given source and sets this table for given
-	 * JavaScriptUnit.
-	 *
-	 * @param jsunit
-	 *            unit to assign calculated LineEndTable
-	 * @param content
-	 *            content to calculate line ends from
-	 */
-	private void buildLineEndTable(JavaScriptUnit jsunit, String content) {
-		int[] lineEnds = new int[250];
-		int linePtr = 0;
-		for (int i = 0, e = content.length(); i < e; ++i)
-			if ( content.charAt(i) == '\n' || content.charAt(i) == '\r') {
-				if(content.length() > i+1 && content.charAt(i) == '\r' && content.charAt(i+1) == '\n' ) ++i;//Skip to next character
-				int length = lineEnds.length;
-				if (linePtr >= length)
-					System.arraycopy(lineEnds, 0, lineEnds = new int[length + 250], 0, length);
-				lineEnds[linePtr++] = i;
-			}
-		System.arraycopy(lineEnds, 0, lineEnds = new int[linePtr], 0, linePtr);
-		jsunit.setLineEndTable(lineEnds);
-	}
-
-}
diff --git a/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/esprima.js b/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/esprima.js
deleted file mode 100644
index 0d7229f32..000000000
--- a/bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/esprima/esprima.js
+++ /dev/null
@@ -1,5743 +0,0 @@
-/*
-  Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved.
-
-  Redistribution and use in source and binary forms, with or without
-  modification, are permitted provided that the following conditions are met:
-
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * 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 THE COPYRIGHT HOLDERS AND 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 <COPYRIGHT HOLDER> 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.
-*/
-
-(function (root, factory) {
-    'use strict';
-
-    // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js,
-    // Rhino, and plain browser loading.
-
-    /* istanbul ignore next */
-    if (typeof define === 'function' && define.amd) {
-        define(['exports'], factory);
-    } else if (typeof exports !== 'undefined') {
-        factory(exports);
-    } else {
-        factory((root.esprima = {}));
-    }
-}(this, function (exports) {
-    'use strict';
-
-    var Token,
-        TokenName,
-        FnExprTokens,
-        Syntax,
-        PlaceHolders,
-        Messages,
-        Regex,
-        source,
-        strict,
-        index,
-        lineNumber,
-        lineStart,
-        hasLineTerminator,
-        lastIndex,
-        lastLineNumber,
-        lastLineStart,
-        startIndex,
-        startLineNumber,
-        startLineStart,
-        scanning,
-        length,
-        lookahead,
-        state,
-        extra,
-        isBindingElement,
-        isAssignmentTarget,
-        firstCoverInitializedNameError;
-
-    Token = {
-        BooleanLiteral: 1,
-        EOF: 2,
-        Identifier: 3,
-        Keyword: 4,
-        NullLiteral: 5,
-        NumericLiteral: 6,
-        Punctuator: 7,
-        StringLiteral: 8,
-        RegularExpression: 9,
-        Template: 10
-    };
-
-    TokenName = {};
-    TokenName[Token.BooleanLiteral] = 'Boolean';
-    TokenName[Token.EOF] = '<end>';
-    TokenName[Token.Identifier] = 'Identifier';
-    TokenName[Token.Keyword] = 'Keyword';
-    TokenName[Token.NullLiteral] = 'Null';
-    TokenName[Token.NumericLiteral] = 'Numeric';
-    TokenName[Token.Punctuator] = 'Punctuator';
-    TokenName[Token.StringLiteral] = 'String';
-    TokenName[Token.RegularExpression] = 'RegularExpression';
-    TokenName[Token.Template] = 'Template';
-
-    // A function following one of those tokens is an expression.
-    FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new',
-                    'return', 'case', 'delete', 'throw', 'void',
-                    // assignment operators
-                    '=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=',
-                    '&=', '|=', '^=', ',',
-                    // binary/unary operators
-                    '+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&',
-                    '|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=',
-                    '<=', '<', '>', '!=', '!=='];
-
-    Syntax = {
-        AssignmentExpression: 'AssignmentExpression',
-        AssignmentPattern: 'AssignmentPattern',
-        ArrayExpression: 'ArrayExpression',
-        ArrayPattern: 'ArrayPattern',
-        ArrowFunctionExpression: 'ArrowFunctionExpression',
-        BlockStatement: 'BlockStatement',
-        BinaryExpression: 'BinaryExpression',
-        BreakStatement: 'BreakStatement',
-        CallExpression: 'CallExpression',
-        CatchClause: 'CatchClause',
-        ClassBody: 'ClassBody',
-        ClassDeclaration: 'ClassDeclaration',
-        ClassExpression: 'ClassExpression',
-        ConditionalExpression: 'ConditionalExpression',
-        ContinueStatement: 'ContinueStatement',
-        DoWhileStatement: 'DoWhileStatement',
-        DebuggerStatement: 'DebuggerStatement',
-        EmptyStatement: 'EmptyStatement',
-        ExportAllDeclaration: 'ExportAllDeclaration',
-        ExportDefaultDeclaration: 'ExportDefaultDeclaration',
-        ExportNamedDeclaration: 'ExportNamedDeclaration',
-        ExportSpecifier: 'ExportSpecifier',
-        ExpressionStatement: 'ExpressionStatement',
-        ForStatement: 'ForStatement',
-        ForOfStatement: 'ForOfStatement',
-        ForInStatement: 'ForInStatement',
-        FunctionDeclaration: 'FunctionDeclaration',
-        FunctionExpression: 'FunctionExpression',
-        Identifier: 'Identifier',
-        IfStatement: 'IfStatement',
-        ImportDeclaration: 'ImportDeclaration',
-        ImportDefaultSpecifier: 'ImportDefaultSpecifier',
-        ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',
-        ImportSpecifier: 'ImportSpecifier',
-        Literal: 'Literal',
-        LabeledStatement: 'LabeledStatement',
-        LogicalExpression: 'LogicalExpression',
-        MemberExpression: 'MemberExpression',
-        MetaProperty: 'MetaProperty',
-        MethodDefinition: 'MethodDefinition',
-        NewExpression: 'NewExpression',
-        ObjectExpression: 'ObjectExpression',
-        ObjectPattern: 'ObjectPattern',
-        Program: 'Program',
-        Property: 'Property',
-        RestElement: 'RestElement',
-        ReturnStatement: 'ReturnStatement',
-        SequenceExpression: 'SequenceExpression',
-        SpreadElement: 'SpreadElement',
-        Super: 'Super',
-        SwitchCase: 'SwitchCase',
-        SwitchStatement: 'SwitchStatement',
-        TaggedTemplateExpression: 'TaggedTemplateExpression',
-        TemplateElement: 'TemplateElement',
-        TemplateLiteral: 'TemplateLiteral',
-        ThisExpression: 'ThisExpression',
-        ThrowStatement: 'ThrowStatement',
-        TryStatement: 'TryStatement',
-        UnaryExpression: 'UnaryExpression',
-        UpdateExpression: 'UpdateExpression',
-        VariableDeclaration: 'VariableDeclaration',
-        VariableDeclarator: 'VariableDeclarator',
-        WhileStatement: 'WhileStatement',
-        WithStatement: 'WithStatement',
-        YieldExpression: 'YieldExpression'
-    };
-
-    PlaceHolders = {
-        ArrowParameterPlaceHolder: 'ArrowParameterPlaceHolder'
-    };
-
-    // Error messages should be identical to V8.
-    Messages = {
-        UnexpectedToken: 'Unexpected token %0',
-        UnexpectedNumber: 'Unexpected number',
-        UnexpectedString: 'Unexpected string',
-        UnexpectedIdentifier: 'Unexpected identifier',
-        UnexpectedReserved: 'Unexpected reserved word',
-        UnexpectedTemplate: 'Unexpected quasi %0',
-        UnexpectedEOS: 'Unexpected end of input',
-        NewlineAfterThrow: 'Illegal newline after throw',
-        InvalidRegExp: 'Invalid regular expression',
-        UnterminatedRegExp: 'Invalid regular expression: missing /',
-        InvalidLHSInAssignment: 'Invalid left-hand side in assignment',
-        InvalidLHSInForIn: 'Invalid left-hand side in for-in',
-        InvalidLHSInForLoop: 'Invalid left-hand side in for-loop',
-        MultipleDefaultsInSwitch: 'More than one default clause in switch statement',
-        NoCatchOrFinally: 'Missing catch or finally after try',
-        UnknownLabel: 'Undefined label \'%0\'',
-        Redeclaration: '%0 \'%1\' has already been declared',
-        IllegalContinue: 'Illegal continue statement',
-        IllegalBreak: 'Illegal break statement',
-        IllegalReturn: 'Illegal return statement',
-        StrictModeWith: 'Strict mode code may not include a with statement',
-        StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode',
-        StrictVarName: 'Variable name may not be eval or arguments in strict mode',
-        StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode',
-        StrictParamDupe: 'Strict mode function may not have duplicate parameter names',
-        StrictFunctionName: 'Function name may not be eval or arguments in strict mode',
-        StrictOctalLiteral: 'Octal literals are not allowed in strict mode.',
-        StrictDelete: 'Delete of an unqualified identifier in strict mode.',
-        StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode',
-        StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode',
-        StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode',
-        StrictReservedWord: 'Use of future reserved word in strict mode',
-        TemplateOctalLiteral: 'Octal literals are not allowed in template strings.',
-        ParameterAfterRestParameter: 'Rest parameter must be last formal parameter',
-        DefaultRestParameter: 'Unexpected token =',
-        ObjectPatternAsRestParameter: 'Unexpected token {',
-        DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals',
-        ConstructorSpecialMethod: 'Class constructor may not be an accessor',
-        DuplicateConstructor: 'A class may only have one constructor',
-        StaticPrototype: 'Classes may not have static property named prototype',
-        MissingFromClause: 'Unexpected token',
-        NoAsAfterImportNamespace: 'Unexpected token',
-        InvalidModuleSpecifier: 'Unexpected token',
-        IllegalImportDeclaration: 'Unexpected token',
-        IllegalExportDeclaration: 'Unexpected token',
-        DuplicateBinding: 'Duplicate binding %0'
-    };
-
-    // See also tools/generate-unicode-regex.js.
-    Regex = {
-        // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierStart:
-        NonAsciiIdentifierStart: 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-
-        // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierPart:
-        NonAsciiIdentifierPart: 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-    };
-
-    // Ensure the condition is true, otherwise throw an error.
-    // This is only to have a better contract semantic, i.e. another safety net
-    // to catch a logic error. The condition shall be fulfilled in normal case.
-    // Do NOT use this to enforce a certain condition on any user input.
-
-    function assert(condition, message) {
-        /* istanbul ignore if */
-        if (!condition) {
-            throw new Error('ASSERT: ' + message);
-        }
-    }
-
-    function isDecimalDigit(ch) {
-        return (ch >= 0x30 && ch <= 0x39);   // 0..9
-    }
-
-    function isHexDigit(ch) {
-        return '0123456789abcdefABCDEF'.indexOf(ch) >= 0;
-    }
-
-    function isOctalDigit(ch) {
-        return '01234567'.indexOf(ch) >= 0;
-    }
-
-    function octalToDecimal(ch) {
-        // \0 is not octal escape sequence
-        var octal = (ch !== '0'), code = '01234567'.indexOf(ch);
-
-        if (index < length && isOctalDigit(source[index])) {
-            octal = true;
-            code = code * 8 + '01234567'.indexOf(source[index++]);
-
-            // 3 digits are only allowed when string starts
-            // with 0, 1, 2, 3
-            if ('0123'.indexOf(ch) >= 0 &&
-                    index < length &&
-                    isOctalDigit(source[index])) {
-                code = code * 8 + '01234567'.indexOf(source[index++]);
-            }
-        }
-
-        return {
-            code: code,
-            octal: octal
-        };
-    }
-
-    // ECMA-262 11.2 White Space
-
-    function isWhiteSpace(ch) {
-        return (ch === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) ||
-            (ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0);
-    }
-
-    // ECMA-262 11.3 Line Terminators
-
-    function isLineTerminator(ch) {
-        return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029);
-    }
-
-    // ECMA-262 11.6 Identifier Names and Identifiers
-
-    function fromCodePoint(cp) {
-        return (cp < 0x10000) ? String.fromCharCode(cp) :
-            String.fromCharCode(0xD800 + ((cp - 0x10000) >> 10)) +
-            String.fromCharCode(0xDC00 + ((cp - 0x10000) & 1023));
-    }
-
-    function isIdentifierStart(ch) {
-        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)
-            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z
-            (ch >= 0x61 && ch <= 0x7A) ||         // a..z
-            (ch === 0x5C) ||                      // \ (backslash)
-            ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch)));
-    }
-
-    function isIdentifierPart(ch) {
-        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)
-            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z
-            (ch >= 0x61 && ch <= 0x7A) ||         // a..z
-            (ch >= 0x30 && ch <= 0x39) ||         // 0..9
-            (ch === 0x5C) ||                      // \ (backslash)
-            ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch)));
-    }
-
-    // ECMA-262 11.6.2.2 Future Reserved Words
-
-    function isFutureReservedWord(id) {
-        switch (id) {
-        case 'enum':
-        case 'export':
-        case 'import':
-        case 'super':
-            return true;
-        default:
-            return false;
-        }
-    }
-
-    function isStrictModeReservedWord(id) {
-        switch (id) {
-        case 'implements':
-        case 'interface':
-        case 'package':
-        case 'private':
-        case 'protected':
-        case 'public':
-        case 'static':
-        case 'yield':
-        case 'let':
-            return true;
-        default:
-            return false;
-        }
-    }
-
-    function isRestrictedWord(id) {
-        return id === 'eval' || id === 'arguments';
-    }
-
-    // ECMA-262 11.6.2.1 Keywords
-
-    function isKeyword(id) {
-        switch (id.length) {
-        case 2:
-            return (id === 'if') || (id === 'in') || (id === 'do');
-        case 3:
-            return (id === 'var') || (id === 'for') || (id === 'new') ||
-                (id === 'try') || (id === 'let');
-        case 4:
-            return (id === 'this') || (id === 'else') || (id === 'case') ||
-                (id === 'void') || (id === 'with') || (id === 'enum');
-        case 5:
-            return (id === 'while') || (id === 'break') || (id === 'catch') ||
-                (id === 'throw') || (id === 'const') || (id === 'yield') ||
-                (id === 'class') || (id === 'super');
-        case 6:
-            return (id === 'return') || (id === 'typeof') || (id === 'delete') ||
-                (id === 'switch') || (id === 'export') || (id === 'import');
-        case 7:
-            return (id === 'default') || (id === 'finally') || (id === 'extends');
-        case 8:
-            return (id === 'function') || (id === 'continue') || (id === 'debugger');
-        case 10:
-            return (id === 'instanceof');
-        default:
-            return false;
-        }
-    }
-
-    // ECMA-262 11.4 Comments
-
-    function addComment(type, value, start, end, loc) {
-        var comment;
-
-        assert(typeof start === 'number', 'Comment must have valid position');
-
-        state.lastCommentStart = start;
-
-        comment = {
-            type: type,
-            value: value
-        };
-        if (extra.range) {
-            comment.range = [start, end];
-        }
-        if (extra.loc) {
-            comment.loc = loc;
-        }
-        extra.comments.push(comment);
-        if (extra.attachComment) {
-            extra.leadingComments.push(comment);
-            extra.trailingComments.push(comment);
-        }
-        if (extra.tokenize) {
-            comment.type = comment.type + 'Comment';
-            if (extra.delegate) {
-                comment = extra.delegate(comment);
-            }
-            extra.tokens.push(comment);
-        }
-    }
-
-    function skipSingleLineComment(offset) {
-        var start, loc, ch, comment;
-
-        start = index - offset;
-        loc = {
-            start: {
-                line: lineNumber,
-                column: index - lineStart - offset
-            }
-        };
-
-        while (index < length) {
-            ch = source.charCodeAt(index);
-            ++index;
-            if (isLineTerminator(ch)) {
-                hasLineTerminator = true;
-                if (extra.comments) {
-                    comment = source.slice(start + offset, index - 1);
-                    loc.end = {
-                        line: lineNumber,
-                        column: index - lineStart - 1
-                    };
-                    addComment('Line', comment, start, index - 1, loc);
-                }
-                if (ch === 13 && source.charCodeAt(index) === 10) {
-                    ++index;
-                }
-                ++lineNumber;
-                lineStart = index;
-                return;
-            }
-        }
-
-        if (extra.comments) {
-            comment = source.slice(start + offset, index);
-            loc.end = {
-                line: lineNumber,
-                column: index - lineStart
-            };
-            addComment('Line', comment, start, index, loc);
-        }
-    }
-
-    function skipMultiLineComment() {
-        var start, loc, ch, comment;
-
-        if (extra.comments) {
-            start = index - 2;
-            loc = {
-                start: {
-                    line: lineNumber,
-                    column: index - lineStart - 2
-                }
-            };
-        }
-
-        while (index < length) {
-            ch = source.charCodeAt(index);
-            if (isLineTerminator(ch)) {
-                if (ch === 0x0D && source.charCodeAt(index + 1) === 0x0A) {
-                    ++index;
-                }
-                hasLineTerminator = true;
-                ++lineNumber;
-                ++index;
-                lineStart = index;
-            } else if (ch === 0x2A) {
-                // Block comment ends with '*/'.
-                if (source.charCodeAt(index + 1) === 0x2F) {
-                    ++index;
-                    ++index;
-                    if (extra.comments) {
-                        comment = source.slice(start + 2, index - 2);
-                        loc.end = {
-                            line: lineNumber,
-                            column: index - lineStart
-                        };
-                        addComment('Block', comment, start, index, loc);
-                    }
-                    return;
-                }
-                ++index;
-            } else {
-                ++index;
-            }
-        }
-
-        // Ran off the end of the file - the whole thing is a comment
-        if (extra.comments) {
-            loc.end = {
-                line: lineNumber,
-                column: index - lineStart
-            };
-            comment = source.slice(start + 2, index);
-            addComment('Block', comment, start, index, loc);
-        }
-        tolerateUnexpectedToken();
-    }
-
-    function skipComment() {
-        var ch, start;
-        hasLineTerminator = false;
-
-        start = (index === 0);
-        while (index < length) {
-            ch = source.charCodeAt(index);
-
-            if (isWhiteSpace(ch)) {
-                ++index;
-            } else if (isLineTerminator(ch)) {
-                hasLineTerminator = true;
-                ++index;
-                if (ch === 0x0D && source.charCodeAt(index) === 0x0A) {
-                    ++index;
-                }
-                ++lineNumber;
-                lineStart = index;
-                start = true;
-            } else if (ch === 0x2F) { // U+002F is '/'
-                ch = source.charCodeAt(index + 1);
-                if (ch === 0x2F) {
-                    ++index;
-                    ++index;
-                    skipSingleLineComment(2);
-                    start = true;
-                } else if (ch === 0x2A) {  // U+002A is '*'
-                    ++index;
-                    ++index;
-                    skipMultiLineComment();
-                } else {
-                    break;
-                }
-            } else if (start && ch === 0x2D) { // U+002D is '-'
-                // U+003E is '>'
-                if ((source.charCodeAt(index + 1) === 0x2D) && (source.charCodeAt(index + 2) === 0x3E)) {
-                    // '-->' is a single-line comment
-                    index += 3;
-                    skipSingleLineComment(3);
-                } else {
-                    break;
-                }
-            } else if (ch === 0x3C) { // U+003C is '<'
-                if (source.slice(index + 1, index + 4) === '!--') {
-                    ++index; // `<`
-                    ++index; // `!`
-                    ++index; // `-`
-                    ++index; // `-`
-                    skipSingleLineComment(4);
-                } else {
-                    break;
-                }
-            } else {
-                break;
-            }
-        }
-    }
-
-    function scanHexEscape(prefix) {
-        var i, len, ch, code = 0;
-
-        len = (prefix === 'u') ? 4 : 2;
-        for (i = 0; i < len; ++i) {
-            if (index < length && isHexDigit(source[index])) {
-                ch = source[index++];
-                code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
-            } else {
-                return '';
-            }
-        }
-        return String.fromCharCode(code);
-    }
-
-    function scanUnicodeCodePointEscape() {
-        var ch, code;
-
-        ch = source[index];
-        code = 0;
-
-        // At least, one hex digit is required.
-        if (ch === '}') {
-            throwUnexpectedToken();
-        }
-
-        while (index < length) {
-            ch = source[index++];
-            if (!isHexDigit(ch)) {
-                break;
-            }
-            code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
-        }
-
-        if (code > 0x10FFFF || ch !== '}') {
-            throwUnexpectedToken();
-        }
-
-        return fromCodePoint(code);
-    }
-
-    function codePointAt(i) {
-        var cp, first, second;
-
-        cp = source.charCodeAt(i);
-        if (cp >= 0xD800 && cp <= 0xDBFF) {
-            second = source.charCodeAt(i + 1);
-            if (second >= 0xDC00 && second <= 0xDFFF) {
-                first = cp;
-                cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
-            }
-        }
-
-        return cp;
-    }
-
-    function getComplexIdentifier() {
-        var cp, ch, id;
-
-        cp = codePointAt(index);
-        id = fromCodePoint(cp);
-        index += id.length;
-
-        // '\u' (U+005C, U+0075) denotes an escaped character.
-        if (cp === 0x5C) {
-            if (source.charCodeAt(index) !== 0x75) {
-                throwUnexpectedToken();
-            }
-            ++index;
-            if (source[index] === '{') {
-                ++index;
-                ch = scanUnicodeCodePointEscape();
-            } else {
-                ch = scanHexEscape('u');
-                cp = ch.charCodeAt(0);
-                if (!ch || ch === '\\' || !isIdentifierStart(cp)) {
-                    throwUnexpectedToken();
-                }
-            }
-            id = ch;
-        }
-
-        while (index < length) {
-            cp = codePointAt(index);
-            if (!isIdentifierPart(cp)) {
-                break;
-            }
-            ch = fromCodePoint(cp);
-            id += ch;
-            index += ch.length;
-
-            // '\u' (U+005C, U+0075) denotes an escaped character.
-            if (cp === 0x5C) {
-                id = id.substr(0, id.length - 1);
-                if (source.charCodeAt(index) !== 0x75) {
-                    throwUnexpectedToken();
-                }
-                ++index;
-                if (source[index] === '{') {
-                    ++index;
-                    ch = scanUnicodeCodePointEscape();
-                } else {
-                    ch = scanHexEscape('u');
-                    cp = ch.charCodeAt(0);
-                    if (!ch || ch === '\\' || !isIdentifierPart(cp)) {
-                        throwUnexpectedToken();
-                    }
-                }
-                id += ch;
-            }
-        }
-
-        return id;
-    }
-
-    function getIdentifier() {
-        var start, ch;
-
-        start = index++;
-        while (index < length) {
-            ch = source.charCodeAt(index);
-            if (ch === 0x5C) {
-                // Blackslash (U+005C) marks Unicode escape sequence.
-                index = start;
-                return getComplexIdentifier();
-            } else if (ch >= 0xD800 && ch < 0xDFFF) {
-                // Need to handle surrogate pairs.
-                index = start;
-                return getComplexIdentifier();
-            }
-            if (isIdentifierPart(ch)) {
-                ++index;
-            } else {
-                break;
-            }
-        }
-
-        return source.slice(start, index);
-    }
-
-    function scanIdentifier() {
-        var start, id, type;
-
-        start = index;
-
-        // Backslash (U+005C) starts an escaped character.
-        id = (source.charCodeAt(index) === 0x5C) ? getComplexIdentifier() : getIdentifier();
-
-        // There is no keyword or literal with only one character.
-        // Thus, it must be an identifier.
-        if (id.length === 1) {
-            type = Token.Identifier;
-        } else if (isKeyword(id)) {
-            type = Token.Keyword;
-        } else if (id === 'null') {
-            type = Token.NullLiteral;
-        } else if (id === 'true' || id === 'false') {
-            type = Token.BooleanLiteral;
-        } else {
-            type = Token.Identifier;
-        }
-
-        return {
-            type: type,
-            value: id,
-            lineNumber: lineNumber,
-            lineStart: lineStart,
-            start: start,
-            end: index
-        };
-    }
-
-
-    // ECMA-262 11.7 Punctuators
-
-    function scanPunctuator() {
-        var token, str;
-
-        token = {
-            type: Token.Punctuator,
-            value: '',
-            lineNumber: lineNumber,
-            lineStart: lineStart,
-            start: index,
-            end: index
-        };
-
-        // Check for most common single-character punctuators.
-        str = source[index];
-        switch (str) {
-
-        case '(':
-            if (extra.tokenize) {
-                extra.openParenToken = extra.tokenValues.length;
-            }
-            ++index;
-            break;
-
-        case '{':
-            if (extra.tokenize) {
-                extra.openCurlyToken = extra.tokenValues.length;
-            }
-            state.curlyStack.push('{');
-            ++index;
-            break;
-
-        case '.':
-            ++index;
-            if (source[index] === '.' && source[index + 1] === '.') {
-                // Spread operator: ...
-                index += 2;
-                str = '...';
-            }
-            break;
-
-        case '}':
-            ++index;
-            state.curlyStack.pop();
-            break;
-        case ')':
-        case ';':
-        case ',':
-        case '[':
-        case ']':
-        case ':':
-        case '?':
-        case '~':
-            ++index;
-            break;
-
-        default:
-            // 4-character punctuator.
-            str = source.substr(index, 4);
-            if (str === '>>>=') {
-                index += 4;
-            } else {
-
-                // 3-character punctuators.
-                str = str.substr(0, 3);
-                if (str === '===' || str === '!==' || str === '>>>' ||
-                    str === '<<=' || str === '>>=') {
-                    index += 3;
-                } else {
-
-                    // 2-character punctuators.
-                    str = str.substr(0, 2);
-                    if (str === '&&' || str === '||' || str === '==' || str === '!=' ||
-                        str === '+=' || str === '-=' || str === '*=' || str === '/=' ||
-                        str === '++' || str === '--' || str === '<<' || str === '>>' ||
-                        str === '&=' || str === '|=' || str === '^=' || str === '%=' ||
-                        str === '<=' || str === '>=' || str === '=>') {
-                        index += 2;
-                    } else {
-
-                        // 1-character punctuators.
-                        str = source[index];
-                        if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {
-                            ++index;
-                        }
-                    }
-                }
-            }
-        }
-
-        if (index === token.start) {
-            throwUnexpectedToken();
-        }
-
-        token.end = index;
-        token.value = str;
-        return token;
-    }
-
-    // ECMA-262 11.8.3 Numeric Literals
-
-    function scanHexLiteral(start) {
-        var number = '';
-
-        while (index < length) {
-            if (!isHexDigit(source[index])) {
-                break;
-            }
-            number += source[index++];
-        }
-
-        if (number.length === 0) {
-            throwUnexpectedToken();
-        }
-
-        if (isIdentifierStart(source.charCodeAt(index))) {
-            throwUnexpectedToken();
-        }
-
-        return {
-            type: Token.NumericLiteral,
-            value: parseInt('0x' + number, 16),
-            lineNumber: lineNumber,
-            lineStart: lineStart,
-            start: start,
-            end: index
-        };
-    }
-
-    function scanBinaryLiteral(start) {
-        var ch, number;
-
-        number = '';
-
-        while (index < length) {
-            ch = source[index];
-            if (ch !== '0' && ch !== '1') {
-                break;
-            }
-            number += source[index++];
-        }
-
-        if (number.length === 0) {
-            // only 0b or 0B
-            throwUnexpectedToken();
-        }
-
-        if (index < length) {
-            ch = source.charCodeAt(index);
-            /* istanbul ignore else */
-            if (isIdentifierStart(ch) || isDecimalDigit(ch)) {
-                throwUnexpectedToken();
-            }
-        }
-
-        return {
-            type: Token.NumericLiteral,
-            value: parseInt(number, 2),
-            lineNumber: lineNumber,
-            lineStart: lineStart,
-            start: start,
-            end: index
-        };
-    }
-
-    function scanOctalLiteral(prefix, start) {
-        var number, octal;
-
-        if (isOctalDigit(prefix)) {
-            octal = true;
-            number = '0' + source[index++];
-        } else {
-            octal = false;
-            ++index;
-            number = '';
-        }
-
-        while (index < length) {
-            if (!isOctalDigit(source[index])) {
-                break;
-            }
-            number += source[index++];
-        }
-
-        if (!octal && number.length === 0) {
-            // only 0o or 0O
-            throwUnexpectedToken();
-        }
-
-        if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) {
-            throwUnexpectedToken();
-        }
-
-        return {
-            type: Token.NumericLiteral,
-            value: parseInt(number, 8),
-            octal: octal,
-            lineNumber: lineNumber,
-            lineStart: lineStart,
-            start: start,
-            end: index
-        };
-    }
-
-    function isImplicitOctalLiteral() {
-        var i, ch;
-
-        // Implicit octal, unless there is a non-octal digit.
-        // (Annex B.1.1 on Numeric Literals)
-        for (i = index + 1; i < length; ++i) {
-            ch = source[i];
-            if (ch === '8' || ch === '9') {
-                return false;
-            }
-            if (!isOctalDigit(ch)) {
-                return true;
-            }
-        }
-
-        return true;
-    }
-
-    function scanNumericLiteral() {
-        var number, start, ch;
-
-        ch = source[index];
-        assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'),
-            'Numeric literal must start with a decimal digit or a decimal point');
-
-        start = index;
-        number = '';
-        if (ch !== '.') {
-            number = source[index++];
-            ch = source[index];
-
-            // Hex number starts with '0x'.
-            // Octal number starts with '0'.
-            // Octal number in ES6 starts with '0o'.
-            // Binary number in ES6 starts with '0b'.
-            if (number === '0') {
-                if (ch === 'x' || ch === 'X') {
-                    ++index;
-                    return scanHexLiteral(start);
-                }
-                if (ch === 'b' || ch === 'B') {
-                    ++index;
-                    return scanBinaryLiteral(start);
-                }
-                if (ch === 'o' || ch === 'O') {
-                    return scanOctalLiteral(ch, start);
-                }
-
-                if (isOctalDigit(ch)) {
-                    if (isImplicitOctalLiteral()) {
-                        return scanOctalLiteral(ch, start);
-                    }
-                }
-            }
-
-            while (isDecimalDigit(source.charCodeAt(index))) {
-                number += source[index++];
-            }
-            ch = source[index];
-        }
-
-        if (ch === '.') {
-            number += source[index++];
-            while (isDecimalDigit(source.charCodeAt(index))) {
-                number += source[index++];
-            }
-            ch = source[index];
-        }
-
-        if (ch === 'e' || ch === 'E') {
-            number += source[index++];
-
-            ch = source[index];
-            if (ch === '+' || ch === '-') {
-                number += source[index++];
-            }
-            if (isDecimalDigit(source.charCodeAt(index))) {
-                while (isDecimalDigit(source.charCodeAt(index))) {
-                    number += source[index++];
-                }
-            } else {
-                throwUnexpectedToken();
-            }
-        }
-
-        if (isIdentifierStart(source.charCodeAt(index))) {
-            throwUnexpectedToken();
-        }
-
-        return {
-            type: Token.NumericLiteral,
-            value: parseFloat(number),
-            lineNumber: lineNumber,
-            lineStart: lineStart,
-            start: start,
-            end: index
-        };
-    }
-
-    // ECMA-262 11.8.4 String Literals
-
-    function scanStringLiteral() {
-        var str = '', quote, start, ch, unescaped, octToDec, octal = false;
-
-        quote = source[index];
-        assert((quote === '\'' || quote === '"'),
-            'String literal must starts with a quote');
-
-        start = index;
-        ++index;
-
-        while (index < length) {
-            ch = source[index++];
-
-            if (ch === quote) {
-                quote = '';
-                break;
-            } else if (ch === '\\') {
-                ch = source[index++];
-                if (!ch || !isLineTerminator(ch.charCodeAt(0))) {
-                    switch (ch) {
-                    case 'u':
-                    case 'x':
-                        if (source[index] === '{') {
-                            ++index;
-                            str += scanUnicodeCodePointEscape();
-                        } else {
-                            unescaped = scanHexEscape(ch);
-                            if (!unescaped) {
-                                throw throwUnexpectedToken();
-                            }
-                            str += unescaped;
-                        }
-                        break;
-                    case 'n':
-                        str += '\n';
-                        break;
-                    case 'r':
-                        str += '\r';
-                        break;
-                    case 't':
-                        str += '\t';
-                        break;
-                    case 'b':
-                        str += '\b';
-                        break;
-                    case 'f':
-                        str += '\f';
-                        break;
-                    case 'v':
-                        str += '\x0B';
-                        break;
-                    case '8':
-                    case '9':
-                        str += ch;
-                        tolerateUnexpectedToken();
-                        break;
-
-                    default:
-                        if (isOctalDigit(ch)) {
-                            octToDec = octalToDecimal(ch);
-
-                            octal = octToDec.octal || octal;
-                            str += String.fromCharCode(octToDec.code);
-                        } else {
-                            str += ch;
-                        }
-                        break;
-                    }
-                } else {
-                    ++lineNumber;
-                    if (ch === '\r' && source[index] === '\n') {
-                        ++index;
-                    }
-                    lineStart = index;
-                }
-            } else if (isLineTerminator(ch.charCodeAt(0))) {
-                break;
-            } else {
-                str += ch;
-            }
-        }
-
-        if (quote !== '') {
-            throwUnexpectedToken();
-        }
-
-        return {
-            type: Token.StringLiteral,
-            value: str,
-            octal: octal,
-            lineNumber: startLineNumber,
-            lineStart: startLineStart,
-            start: start,
-            end: index
-        };
-    }
-
-    // ECMA-262 11.8.6 Template Literal Lexical Components
-
-    function scanTemplate() {
-        var cooked = '', ch, start, rawOffset, terminated, head, tail, restore, unescaped;
-
-        terminated = false;
-        tail = false;
-        start = index;
-        head = (source[index] === '`');
-        rawOffset = 2;
-
-        ++index;
-
-        while (index < length) {
-            ch = source[index++];
-            if (ch === '`') {
-                rawOffset = 1;
-                tail = true;
-                terminated = true;
-                break;
-            } else if (ch === '$') {
-                if (source[index] === '{') {
-                    state.curlyStack.push('${');
-                    ++index;
-                    terminated = true;
-                    break;
-                }
-                cooked += ch;
-            } else if (ch === '\\') {
-                ch = source[index++];
-                if (!isLineTerminator(ch.charCodeAt(0))) {
-                    switch (ch) {
-                    case 'n':
-                        cooked += '\n';
-                        break;
-                    case 'r':
-                        cooked += '\r';
-                        break;
-                    case 't':
-                        cooked += '\t';
-                        break;
-                    case 'u':
-                    case 'x':
-                        if (source[index] === '{') {
-                            ++index;
-                            cooked += scanUnicodeCodePointEscape();
-                        } else {
-                            restore = index;
-                            unescaped = scanHexEscape(ch);
-                            if (unescaped) {
-                                cooked += unescaped;
-                            } else {
-                                index = restore;
-                                cooked += ch;
-                            }
-                        }
-                        break;
-                    case 'b':
-                        cooked += '\b';
-                        break;
-                    case 'f':
-                        cooked += '\f';
-                        break;
-                    case 'v':
-                        cooked += '\v';
-                        break;
-
-                    default:
-                        if (ch === '0') {
-                            if (isDecimalDigit(source.charCodeAt(index))) {
-                                // Illegal: \01 \02 and so on
-                                throwError(Messages.TemplateOctalLiteral);
-                            }
-                            cooked += '\0';
-                        } else if (isOctalDigit(ch)) {
-                            // Illegal: \1 \2
-                            throwError(Messages.TemplateOctalLiteral);
-                        } else {
-                            cooked += ch;
-                        }
-                        break;
-                    }
-                } else {
-                    ++lineNumber;
-                    if (ch === '\r' && source[index] === '\n') {
-                        ++index;
-                    }
-                    lineStart = index;
-                }
-            } else if (isLineTerminator(ch.charCodeAt(0))) {
-                ++lineNumber;
-                if (ch === '\r' && source[index] === '\n') {
-                    ++index;
-                }
-                lineStart = index;
-                cooked += '\n';
-            } else {
-                cooked += ch;
-            }
-        }
-
-        if (!terminated) {
-            throwUnexpectedToken();
-        }
-
-        if (!head) {
-            state.curlyStack.pop();
-        }
-
-        return {
-            type: Token.Template,
-            value: {
-                cooked: cooked,
-                raw: source.slice(start + 1, index - rawOffset)
-            },
-            head: head,
-            tail: tail,
-            lineNumber: lineNumber,
-            lineStart: lineStart,
-            start: start,
-            end: index
-        };
-    }
-
-    // ECMA-262 11.8.5 Regular Expression Literals
-
-    function testRegExp(pattern, flags) {
-        // The BMP character to use as a replacement for astral symbols when
-        // translating an ES6 "u"-flagged pattern to an ES5-compatible
-        // approximation.
-        // Note: replacing with '\uFFFF' enables false positives in unlikely
-        // scenarios. For example, `[\u{1044f}-\u{10440}]` is an invalid
-        // pattern that would not be detected by this substitution.
-        var astralSubstitute = '\uFFFF',
-            tmp = pattern;
-
-        if (flags.indexOf('u') >= 0) {
-            tmp = tmp
-                // Replace every Unicode escape sequence with the equivalent
-                // BMP character or a constant ASCII code point in the case of
-                // astral symbols. (See the above note on `astralSubstitute`
-                // for more information.)
-                .replace(/\\u\{([0-9a-fA-F]+)\}|\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) {
-                    var codePoint = parseInt($1 || $2, 16);
-                    if (codePoint > 0x10FFFF) {
-                        throwUnexpectedToken(null, Messages.InvalidRegExp);
-                    }
-                    if (codePoint <= 0xFFFF) {
-                        return String.fromCharCode(codePoint);
-                    }
-                    return astralSubstitute;
-                })
-                // Replace each paired surrogate with a single ASCII symbol to
-                // avoid throwing on regular expressions that are only valid in
-                // combination with the "u" flag.
-                .replace(
-                    /[\uD800-\uDBFF][\uDC00-\uDFFF]/g,
-                    astralSubstitute
-                );
-        }
-
-        // First, detect invalid regular expressions.
-        try {
-            RegExp(tmp);
-        } catch (e) {
-            throwUnexpectedToken(null, Messages.InvalidRegExp);
-        }
-
-        // Return a regular expression object for this pattern-flag pair, or
-        // `null` in case the current environment doesn't support the flags it
-        // uses.
-        try {
-            return new RegExp(pattern, flags);
-        } catch (exception) {
-            return null;
-        }
-    }
-
-    function scanRegExpBody() {
-        var ch, str, classMarker, terminated, body;
-
-        ch = source[index];
-        assert(ch === '/', 'Regular expression literal must start with a slash');
-        str = source[index++];
-
-        classMarker = false;
-        terminated = false;
-        while (index < length) {
-            ch = source[index++];
-            str += ch;
-            if (ch === '\\') {
-                ch = source[index++];
-                // ECMA-262 7.8.5
-                if (isLineTerminator(ch.charCodeAt(0))) {
-                    throwUnexpectedToken(null, Messages.UnterminatedRegExp);
-                }
-                str += ch;
-            } else if (isLineTerminator(ch.charCodeAt(0))) {
-                throwUnexpectedToken(null, Messages.UnterminatedRegExp);
-            } else if (classMarker) {
-                if (ch === ']') {
-                    classMarker = false;
-                }
-            } else {
-                if (ch === '/') {
-                    terminated = true;
-                    break;
-                } else if (ch === '[') {
-                    classMarker = true;
-                }
-            }
-        }
-
-        if (!terminated) {
-            throwUnexpectedToken(null, Messages.UnterminatedRegExp);
-        }
-
-        // Exclude leading and trailing slash.
-        body = str.substr(1, str.length - 2);
-        return {
-            value: body,
-            literal: str
-        };
-    }
-
-    function scanRegExpFlags() {
-        var ch, str, flags, restore;
-
-        str = '';
-        flags = '';
-        while (index < length) {
-            ch = source[index];
-            if (!isIdentifierPart(ch.charCodeAt(0))) {
-                break;
-            }
-
-            ++index;
-            if (ch === '\\' && index < length) {
-                ch = source[index];
-                if (ch === 'u') {
-                    ++index;
-                    restore = index;
-                    ch = scanHexEscape('u');
-                    if (ch) {
-                        flags += ch;
-                        for (str += '\\u'; restore < index; ++restore) {
-                            str += source[restore];
-                        }
-                    } else {
-                        index = restore;
-                        flags += 'u';
-                        str += '\\u';
-                    }
-                    tolerateUnexpectedToken();
-                } else {
-                    str += '\\';
-                    tolerateUnexpectedToken();
-                }
-            } else {
-                flags += ch;
-                str += ch;
-            }
-        }
-
-        return {
-            value: flags,
-            literal: str
-        };
-    }
-
-    function scanRegExp() {
-        var start, body, flags, value;
-        scanning = true;
-
-        lookahead = null;
-        skipComment();
-        start = index;
-
-        body = scanRegExpBody();
-        flags = scanRegExpFlags();
-        value = testRegExp(body.value, flags.value);
-        scanning = false;
-        if (extra.tokenize) {
-            return {
-                type: Token.RegularExpression,
-                value: value,
-                regex: {
-                    pattern: body.value,
-                    flags: flags.value
-                },
-                lineNumber: lineNumber,
-                lineStart: lineStart,
-                start: start,
-                end: index
-            };
-        }
-
-        return {
-            literal: body.literal + flags.literal,
-            value: value,
-            regex: {
-                pattern: body.value,
-                flags: flags.value
-            },
-            start: start,
-            end: index
-        };
-    }
-
-    function collectRegex() {
-        var pos, loc, regex, token;
-
-        skipComment();
-
-        pos = index;
-        loc = {
-            start: {
-                line: lineNumber,
-                column: index - lineStart
-            }
-        };
-
-        regex = scanRegExp();
-
-        loc.end = {
-            line: lineNumber,
-            column: index - lineStart
-        };
-
-        /* istanbul ignore next */
-        if (!extra.tokenize) {
-            // Pop the previous token, which is likely '/' or '/='
-            if (extra.tokens.length > 0) {
-                token = extra.tokens[extra.tokens.length - 1];
-                if (token.range[0] === pos && token.type === 'Punctuator') {
-                    if (token.value === '/' || token.value === '/=') {
-                        extra.tokens.pop();
-                    }
-                }
-            }
-
-            extra.tokens.push({
-                type: 'RegularExpression',
-                value: regex.literal,
-                regex: regex.regex,
-                range: [pos, index],
-                loc: loc
-            });
-        }
-
-        return regex;
-    }
-
-    function isIdentifierName(token) {
-        return token.type === Token.Identifier ||
-            token.type === Token.Keyword ||
-            token.type === Token.BooleanLiteral ||
-            token.type === Token.NullLiteral;
-    }
-
-    // Using the following algorithm:
-    // https://github.com/mozilla/sweet.js/wiki/design
-
-    function advanceSlash() {
-        var regex, previous, check;
-
-        function testKeyword(value) {
-            return value && (value.length > 1) && (value[0] >= 'a') && (value[0] <= 'z');
-        }
-
-        previous = extra.tokenValues[extra.tokens.length - 1];
-        regex = (previous !== null);
-
-        switch (previous) {
-        case 'this':
-        case ']':
-            regex = false;
-            break;
-
-        case ')':
-            check = extra.tokenValues[extra.openParenToken - 1];
-            regex = (check === 'if' || check === 'while' || check === 'for' || check === 'with');
-            break;
-
-        case '}':
-            // Dividing a function by anything makes little sense,
-            // but we have to check for that.
-            regex = false;
-            if (testKeyword(extra.tokenValues[extra.openCurlyToken - 3])) {
-                // Anonymous function, e.g. function(){} /42
-                check = extra.tokenValues[extra.openCurlyToken - 4];
-                regex = check ? (FnExprTokens.indexOf(check) < 0) : false;
-            } else if (testKeyword(extra.tokenValues[extra.openCurlyToken - 4])) {
-                // Named function, e.g. function f(){} /42/
-                check = extra.tokenValues[extra.openCurlyToken - 5];
-                regex = check ? (FnExprTokens.indexOf(check) < 0) : true;
-            }
-        }
-
-        return regex ? collectRegex() : scanPunctuator();
-    }
-
-    function advance() {
-        var cp, token;
-
-        if (index >= length) {
-            return {
-                type: Token.EOF,
-                lineNumber: lineNumber,
-                lineStart: lineStart,
-                start: index,
-                end: index
-            };
-        }
-
-        cp = source.charCodeAt(index);
-
-        if (isIdentifierStart(cp)) {
-            token = scanIdentifier();
-            if (strict && isStrictModeReservedWord(token.value)) {
-                token.type = Token.Keyword;
-            }
-            return token;
-        }
-
-        // Very common: ( and ) and ;
-        if (cp === 0x28 || cp === 0x29 || cp === 0x3B) {
-            return scanPunctuator();
-        }
-
-        // String literal starts with single quote (U+0027) or double quote (U+0022).
-        if (cp === 0x27 || cp === 0x22) {
-            return scanStringLiteral();
-        }
-
-        // Dot (.) U+002E can also start a floating-point number, hence the need
-        // to check the next character.
-        if (cp === 0x2E) {
-            if (isDecimalDigit(source.charCodeAt(index + 1))) {
-                return scanNumericLiteral();
-            }
-            return scanPunctuator();
-        }
-
-        if (isDecimalDigit(cp)) {
-            return scanNumericLiteral();
-        }
-
-        // Slash (/) U+002F can also start a regex.
-        if (extra.tokenize && cp === 0x2F) {
-            return advanceSlash();
-        }
-
-        // Template literals start with ` (U+0060) for template head
-        // or } (U+007D) for template middle or template tail.
-        if (cp === 0x60 || (cp === 0x7D && state.curlyStack[state.curlyStack.length - 1] === '${')) {
-            return scanTemplate();
-        }
-
-        // Possible identifier start in a surrogate pair.
-        if (cp >= 0xD800 && cp < 0xDFFF) {
-            cp = codePointAt(index);
-            if (isIdentifierStart(cp)) {
-                return scanIdentifier();
-            }
-        }
-
-        return scanPunctuator();
-    }
-
-    function collectToken() {
-        var loc, token, value, entry;
-
-        loc = {
-            start: {
-                line: lineNumber,
-                column: index - lineStart
-            }
-        };
-
-        token = advance();
-        loc.end = {
-            line: lineNumber,
-            column: index - lineStart
-        };
-
-        if (token.type !== Token.EOF) {
-            value = source.slice(token.start, token.end);
-            entry = {
-                type: TokenName[token.type],
-                value: value,
-                range: [token.start, token.end],
-                loc: loc
-            };
-            if (token.regex) {
-                entry.regex = {
-                    pattern: token.regex.pattern,
-                    flags: token.regex.flags
-                };
-            }
-            if (extra.tokenValues) {
-                extra.tokenValues.push((entry.type === 'Punctuator' || entry.type === 'Keyword') ? entry.value : null);
-            }
-            if (extra.tokenize) {
-                if (!extra.range) {
-                    delete entry.range;
-                }
-                if (!extra.loc) {
-                    delete entry.loc;
-                }
-                if (extra.delegate) {
-                    entry = extra.delegate(entry);
-                }
-            }
-            extra.tokens.push(entry);
-        }
-
-        return token;
-    }
-
-    function lex() {
-        var token;
-        scanning = true;
-
-        lastIndex = index;
-        lastLineNumber = lineNumber;
-        lastLineStart = lineStart;
-
-        skipComment();
-
-        token = lookahead;
-
-        startIndex = index;
-        startLineNumber = lineNumber;
-        startLineStart = lineStart;
-
-        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();
-        scanning = false;
-        return token;
-    }
-
-    function peek() {
-        scanning = true;
-
-        skipComment();
-
-        lastIndex = index;
-        lastLineNumber = lineNumber;
-        lastLineStart = lineStart;
-
-        startIndex = index;
-        startLineNumber = lineNumber;
-        startLineStart = lineStart;
-
-        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();
-        scanning = false;
-    }
-
-    function Position() {
-        this.line = startLineNumber;
-        this.column = startIndex - startLineStart;
-    }
-
-    function SourceLocation() {
-        this.start = new Position();
-        this.end = null;
-    }
-
-    function WrappingSourceLocation(startToken) {
-        this.start = {
-            line: startToken.lineNumber,
-            column: startToken.start - startToken.lineStart
-        };
-        this.end = null;
-    }
-
-    function Node() {
-        if (extra.range) {
-            this.range = [startIndex, 0];
-        }
-        if (extra.loc) {
-            this.loc = new SourceLocation();
-        }
-    }
-
-    function WrappingNode(startToken) {
-        if (extra.range) {
-            this.range = [startToken.start, 0];
-        }
-        if (extra.loc) {
-            this.loc = new WrappingSourceLocation(startToken);
-        }
-    }
-
-    WrappingNode.prototype = Node.prototype = {
-
-        processComment: function () {
-            var lastChild,
-                innerComments,
-                leadingComments,
-                trailingComments,
-                bottomRight = extra.bottomRightStack,
-                i,
-                comment,
-                last = bottomRight[bottomRight.length - 1];
-
-            if (this.type === Syntax.Program) {
-                if (this.body.length > 0) {
-                    return;
-                }
-            }
-            /**
-             * patch innnerComments for properties empty block
-             * `function a() {/** comments **\/}`
-             */
-
-            if (this.type === Syntax.BlockStatement && this.body.length === 0) {
-                innerComments = [];
-                for (i = extra.leadingComments.length - 1; i >= 0; --i) {
-                    comment = extra.leadingComments[i];
-                    if (this.range[1] >= comment.range[1]) {
-                        innerComments.unshift(comment);
-                        extra.leadingComments.splice(i, 1);
-                        extra.trailingComments.splice(i, 1);
-                    }
-                }
-                if (innerComments.length) {
-                    this.innerComments = innerComments;
-                    //bottomRight.push(this);
-                    return;
-                }
-            }
-
-            if (extra.trailingComments.length > 0) {
-                trailingComments = [];
-                for (i = extra.trailingComments.length - 1; i >= 0; --i) {
-                    comment = extra.trailingComments[i];
-                    if (comment.range[0] >= this.range[1]) {
-                        trailingComments.unshift(comment);
-                        extra.trailingComments.splice(i, 1);
-                    }
-                }
-                extra.trailingComments = [];
-            } else {
-                if (last && last.trailingComments && last.trailingComments[0].range[0] >= this.range[1]) {
-                    trailingComments = last.trailingComments;
-                    delete last.trailingComments;
-                }
-            }
-
-            // Eating the stack.
-            while (last && last.range[0] >= this.range[0]) {
-                lastChild = bottomRight.pop();
-                last = bottomRight[bottomRight.length - 1];
-            }
-
-            if (lastChild) {
-                if (lastChild.leadingComments) {
-                    leadingComments = [];
-                    for (i = lastChild.leadingComments.length - 1; i >= 0; --i) {
-                        comment = lastChild.leadingComments[i];
-                        if (comment.range[1] <= this.range[0]) {
-                            leadingComments.unshift(comment);
-                            lastChild.leadingComments.splice(i, 1);
-                        }
-                    }
-
-                    if (!lastChild.leadingComments.length) {
-                        lastChild.leadingComments = undefined;
-                    }
-                }
-            } else if (extra.leadingComments.length > 0) {
-                leadingComments = [];
-                for (i = extra.leadingComments.length - 1; i >= 0; --i) {
-                    comment = extra.leadingComments[i];
-                    if (comment.range[1] <= this.range[0]) {
-                        leadingComments.unshift(comment);
-                        extra.leadingComments.splice(i, 1);
-                    }
-                }
-            }
-
-
-            if (leadingComments && leadingComments.length > 0) {
-                this.leadingComments = leadingComments;
-            }
-            if (trailingComments && trailingComments.length > 0) {
-                this.trailingComments = trailingComments;
-            }
-
-            bottomRight.push(this);
-        },
-
-        finish: function () {
-            if (extra.range) {
-                this.range[1] = lastIndex;
-            }
-            if (extra.loc) {
-                this.loc.end = {
-                    line: lastLineNumber,
-                    column: lastIndex - lastLineStart
-                };
-                if (extra.source) {
-                    this.loc.source = extra.source;
-                }
-            }
-
-            if (extra.attachComment) {
-                this.processComment();
-            }
-        },
-
-        finishArrayExpression: function (elements) {
-            this.type = Syntax.ArrayExpression;
-            this.elements = elements;
-            this.finish();
-            return this;
-        },
-
-        finishArrayPattern: function (elements) {
-            this.type = Syntax.ArrayPattern;
-            this.elements = elements;
-            this.finish();
-            return this;
-        },
-
-        finishArrowFunctionExpression: function (params, defaults, body, expression) {
-            this.type = Syntax.ArrowFunctionExpression;
-            this.id = null;
-            this.params = params;
-            this.defaults = defaults;
-            this.body = body;
-            this.generator = false;
-            this.expression = expression;
-            this.finish();
-            return this;
-        },
-
-        finishAssignmentExpression: function (operator, left, right) {
-            this.type = Syntax.AssignmentExpression;
-            this.operator = operator;
-            this.left = left;
-            this.right = right;
-            this.finish();
-            return this;
-        },
-
-        finishAssignmentPattern: function (left, right) {
-            this.type = Syntax.AssignmentPattern;
-            this.left = left;
-            this.right = right;
-            this.finish();
-            return this;
-        },
-
-        finishBinaryExpression: function (operator, left, right) {
-            this.type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : Syntax.BinaryExpression;
-            this.operator = operator;
-            this.left = left;
-            this.right = right;
-            this.finish();
-            return this;
-        },
-
-        finishBlockStatement: function (body) {
-            this.type = Syntax.BlockStatement;
-            this.body = body;
-            this.finish();
-            return this;
-        },
-
-        finishBreakStatement: function (label) {
-            this.type = Syntax.BreakStatement;
-            this.label = label;
-            this.finish();
-            return this;
-        },
-
-        finishCallExpression: function (callee, args) {
-            this.type = Syntax.CallExpression;
-            this.callee = callee;
-            this.arguments = args;
-            this.finish();
-            return this;
-        },
-
-        finishCatchClause: function (param, body) {
-            this.type = Syntax.CatchClause;
-            this.param = param;
-            this.body = body;
-            this.finish();
-            return this;
-        },
-
-        finishClassBody: function (body) {
-            this.type = Syntax.ClassBody;
-            this.body = body;
-            this.finish();
-            return this;
-        },
-
-        finishClassDeclaration: function (id, superClass, body) {
-            this.type = Syntax.ClassDeclaration;
-            this.id = id;
-            this.superClass = superClass;
-            this.body = body;
-            this.finish();
-            return this;
-        },
-
-        finishClassExpression: function (id, superClass, body) {
-            this.type = Syntax.ClassExpression;
-            this.id = id;
-            this.superClass = superClass;
-            this.body = body;
-            this.finish();
-            return this;
-        },
-
-        finishConditionalExpression: function (test, consequent, alternate) {
-            this.type = Syntax.ConditionalExpression;
-            this.test = test;
-            this.consequent = consequent;
-            this.alternate = alternate;
-            this.finish();
-            return this;
-        },
-
-        finishContinueStatement: function (label) {
-            this.type = Syntax.ContinueStatement;
-            this.label = label;
-            this.finish();
-            return this;
-        },
-
-        finishDebuggerStatement: function () {
-            this.type = Syntax.DebuggerStatement;
-            this.finish();
-            return this;
-        },
-
-        finishDoWhileStatement: function (body, test) {
-            this.type = Syntax.DoWhileStatement;
-            this.body = body;
-            this.test = test;
-            this.finish();
-            return this;
-        },
-
-        finishEmptyStatement: function () {
-            this.type = Syntax.EmptyStatement;
-            this.finish();
-            return this;
-        },
-
-        finishExpressionStatement: function (expression) {
-            this.type = Syntax.ExpressionStatement;
-            this.expression = expression;
-            this.finish();
-            return this;
-        },
-
-        finishForStatement: function (init, test, update, body) {
-            this.type = Syntax.ForStatement;
-            this.init = init;
-            this.test = test;
-            this.update = update;
-            this.body = body;
-            this.finish();
-            return this;
-        },
-
-        finishForOfStatement: function (left, right, body) {
-            this.type = Syntax.ForOfStatement;
-            this.left = left;
-            this.right = right;
-            this.body = body;
-            this.finish();
-            return this;
-        },
-
-        finishForInStatement: function (left, right, body) {
-            this.type = Syntax.ForInStatement;
-            this.left = left;
-            this.right = right;
-            this.body = body;
-            this.each = false;
-            this.finish();
-            return this;
-        },
-
-        finishFunctionDeclaration: function (id, params, defaults, body, generator) {
-            this.type = Syntax.FunctionDeclaration;
-            this.id = id;
-            this.params = params;
-            this.defaults = defaults;
-            this.body = body;
-            this.generator = generator;
-            this.expression = false;
-            this.finish();
-            return this;
-        },
-
-        finishFunctionExpression: function (id, params, defaults, body, generator) {
-            this.type = Syntax.FunctionExpression;
-            this.id = id;
-            this.params = params;
-            this.defaults = defaults;
-            this.body = body;
-            this.generator = generator;
-            this.expression = false;
-            this.finish();
-            return this;
-        },
-
-        finishIdentifier: function (name) {
-            this.type = Syntax.Identifier;
-            this.name = name;
-            this.finish();
-            return this;
-        },
-
-        finishIfStatement: function (test, consequent, alternate) {
-            this.type = Syntax.IfStatement;
-            this.test = test;
-            this.consequent = consequent;
-            this.alternate = alternate;
-            this.finish();
-            return this;
-        },
-
-        finishLabeledStatement: function (label, body) {
-            this.type = Syntax.LabeledStatement;
-            this.label = label;
-            this.body = body;
-            this.finish();
-            return this;
-        },
-
-        finishLiteral: function (token) {
-            this.type = Syntax.Literal;
-            this.value = token.value;
-            this.raw = source.slice(token.start, token.end);
-            if (token.regex) {
-                this.regex = token.regex;
-            }
-            this.finish();
-            return this;
-        },
-
-        finishMemberExpression: function (accessor, object, property) {
-            this.type = Syntax.MemberExpression;
-            this.computed = accessor === '[';
-            this.object = object;
-            this.property = property;
-            this.finish();
-            return this;
-        },
-
-        finishMetaProperty: function (meta, property) {
-            this.type = Syntax.MetaProperty;
-            this.meta = meta;
-            this.property = property;
-            this.finish();
-            return this;
-        },
-
-        finishNewExpression: function (callee, args) {
-            this.type = Syntax.NewExpression;
-            this.callee = callee;
-            this.arguments = args;
-            this.finish();
-            return this;
-        },
-
-        finishObjectExpression: function (properties) {
-            this.type = Syntax.ObjectExpression;
-            this.properties = properties;
-            this.finish();
-            return this;
-        },
-
-        finishObjectPattern: function (properties) {
-            this.type = Syntax.ObjectPattern;
-            this.properties = properties;
-            this.finish();
-            return this;
-        },
-
-        finishPostfixExpression: function (operator, argument) {
-            this.type = Syntax.UpdateExpression;
-            this.operator = operator;
-            this.argument = argument;
-            this.prefix = false;
-            this.finish();
-            return this;
-        },
-
-        finishProgram: function (body, sourceType) {
-            this.type = Syntax.Program;
-            this.body = body;
-            this.sourceType = sourceType;
-            this.finish();
-            return this;
-        },
-
-        finishProperty: function (kind, key, computed, value, method, shorthand) {
-            this.type = Syntax.Property;
-            this.key = key;
-            this.computed = computed;
-            this.value = value;
-            this.kind = kind;
-            this.method = method;
-            this.shorthand = shorthand;
-            this.finish();
-            return this;
-        },
-
-        finishRestElement: function (argument) {
-            this.type = Syntax.RestElement;
-            this.argument = argument;
-            this.finish();
-            return this;
-        },
-
-        finishReturnStatement: function (argument) {
-            this.type = Syntax.ReturnStatement;
-            this.argument = argument;
-            this.finish();
-            return this;
-        },
-
-        finishSequenceExpression: function (expressions) {
-            this.type = Syntax.SequenceExpression;
-            this.expressions = expressions;
-            this.finish();
-            return this;
-        },
-
-        finishSpreadElement: function (argument) {
-            this.type = Syntax.SpreadElement;
-            this.argument = argument;
-            this.finish();
-            return this;
-        },
-
-        finishSwitchCase: function (test, consequent) {
-            this.type = Syntax.SwitchCase;
-            this.test = test;
-            this.consequent = consequent;
-            this.finish();
-            return this;
-        },
-
-        finishSuper: function () {
-            this.type = Syntax.Super;
-            this.finish();
-            return this;
-        },
-
-        finishSwitchStatement: function (discriminant, cases) {
-            this.type = Syntax.SwitchStatement;
-            this.discriminant = discriminant;
-            this.cases = cases;
-            this.finish();
-            return this;
-        },
-
-        finishTaggedTemplateExpression: function (tag, quasi) {
-            this.type = Syntax.TaggedTemplateExpression;
-            this.tag = tag;
-            this.quasi = quasi;
-            this.finish();
-            return this;
-        },
-
-        finishTemplateElement: function (value, tail) {
-            this.type = Syntax.TemplateElement;
-            this.value = value;
-            this.tail = tail;
-            this.finish();
-            return this;
-        },
-
-        finishTemplateLiteral: function (quasis, expressions) {
-            this.type = Syntax.TemplateLiteral;
-            this.quasis = quasis;
-            this.expressions = expressions;
-            this.finish();
-            return this;
-        },
-
-        finishThisExpression: function () {
-            this.type = Syntax.ThisExpression;
-            this.finish();
-            return this;
-        },
-
-        finishThrowStatement: function (argument) {
-            this.type = Syntax.ThrowStatement;
-            this.argument = argument;
-            this.finish();
-            return this;
-        },
-
-        finishTryStatement: function (block, handler, finalizer) {
-            this.type = Syntax.TryStatement;
-            this.block = block;
-            this.guardedHandlers = [];
-            this.handlers = handler ? [handler] : [];
-            this.handler = handler;
-            this.finalizer = finalizer;
-            this.finish();
-            return this;
-        },
-
-        finishUnaryExpression: function (operator, argument) {
-            this.type = (operator === '++' || operator === '--') ? Syntax.UpdateExpression : Syntax.UnaryExpression;
-            this.operator = operator;
-            this.argument = argument;
-            this.prefix = true;
-            this.finish();
-            return this;
-        },
-
-        finishVariableDeclaration: function (declarations) {
-            this.type = Syntax.VariableDeclaration;
-            this.declarations = declarations;
-            this.kind = 'var';
-            this.finish();
-            return this;
-        },
-
-        finishLexicalDeclaration: function (declarations, kind) {
-            this.type = Syntax.VariableDeclaration;
-            this.declarations = declarations;
-            this.kind = kind;
-            this.finish();
-            return this;
-        },
-
-        finishVariableDeclarator: function (id, init) {
-            this.type = Syntax.VariableDeclarator;
-            this.id = id;
-            this.init = init;
-            this.finish();
-            return this;
-        },
-
-        finishWhileStatement: function (test, body) {
-            this.type = Syntax.WhileStatement;
-            this.test = test;
-            this.body = body;
-            this.finish();
-            return this;
-        },
-
-        finishWithStatement: function (object, body) {
-            this.type = Syntax.WithStatement;
-            this.object = object;
-            this.body = body;
-            this.finish();
-            return this;
-        },
-
-        finishExportSpecifier: function (local, exported) {
-            this.type = Syntax.ExportSpecifier;
-            this.exported = exported || local;
-            this.local = local;
-            this.finish();
-            return this;
-        },
-
-        finishImportDefaultSpecifier: function (local) {
-            this.type = Syntax.ImportDefaultSpecifier;
-            this.local = local;
-            this.finish();
-            return this;
-        },
-
-        finishImportNamespaceSpecifier: function (local) {
-            this.type = Syntax.ImportNamespaceSpecifier;
-            this.local = local;
-            this.finish();
-            return this;
-        },
-
-        finishExportNamedDeclaration: function (declaration, specifiers, src) {
-            this.type = Syntax.ExportNamedDeclaration;
-            this.declaration = declaration;
-            this.specifiers = specifiers;
-            this.source = src;
-            this.finish();
-            return this;
-        },
-
-        finishExportDefaultDeclaration: function (declaration) {
-            this.type = Syntax.ExportDefaultDeclaration;
-            this.declaration = declaration;
-            this.finish();
-            return this;
-        },
-
-        finishExportAllDeclaration: function (src) {
-            this.type = Syntax.ExportAllDeclaration;
-            this.source = src;
-            this.finish();
-            return this;
-        },
-
-        finishImportSpecifier: function (local, imported) {
-            this.type = Syntax.ImportSpecifier;
-            this.local = local || imported;
-            this.imported = imported;
-            this.finish();
-            return this;
-        },
-
-        finishImportDeclaration: function (specifiers, src) {
-            this.type = Syntax.ImportDeclaration;
-            this.specifiers = specifiers;
-            this.source = src;
-            this.finish();
-            return this;
-        },
-
-        finishYieldExpression: function (argument, delegate) {
-            this.type = Syntax.YieldExpression;
-            this.argument = argument;
-            this.delegate = delegate;
-            this.finish();
-            return this;
-        }
-    };
-
-
-    function recordError(error) {
-        var e, existing;
-
-        for (e = 0; e < extra.errors.length; e++) {
-            existing = extra.errors[e];
-            // Prevent duplicated error.
-            /* istanbul ignore next */
-            if (existing.index === error.index && existing.message === error.message) {
-                return;
-            }
-        }
-
-        extra.errors.push(error);
-    }
-
-    function constructError(msg, column) {
-        var error = new Error(msg);
-        try {
-            throw error;
-        } catch (base) {
-            /* istanbul ignore else */
-            if (Object.create && Object.defineProperty) {
-                error = Object.create(base);
-                Object.defineProperty(error, 'column', { value: column });
-            }
-        } finally {
-            return error;
-        }
-    }
-
-    function createError(line, pos, description) {
-        var msg, column, error;
-
-        msg = 'Line ' + line + ': ' + description;
-        column = pos - (scanning ? lineStart : lastLineStart) + 1;
-        error = constructError(msg, column);
-        error.lineNumber = line;
-        error.description = description;
-        error.index = pos;
-        return error;
-    }
-
-    // Throw an exception
-
-    function throwError(messageFormat) {
-        var args, msg;
-
-        args = Array.prototype.slice.call(arguments, 1);
-        msg = messageFormat.replace(/%(\d)/g,
-            function (whole, idx) {
-                assert(idx < args.length, 'Message reference must be in range');
-                return args[idx];
-            }
-        );
-
-        throw createError(lastLineNumber, lastIndex, msg);
-    }
-
-    function tolerateError(messageFormat) {
-        var args, msg, error;
-
-        args = Array.prototype.slice.call(arguments, 1);
-        /* istanbul ignore next */
-        msg = messageFormat.replace(/%(\d)/g,
-            function (whole, idx) {
-                assert(idx < args.length, 'Message reference must be in range');
-                return args[idx];
-            }
-        );
-
-        error = createError(lineNumber, lastIndex, msg);
-        if (extra.errors) {
-            recordError(error);
-        } else {
-            throw error;
-        }
-    }
-
-    // Throw an exception because of the token.
-
-    function unexpectedTokenError(token, message) {
-        var value, msg = message || Messages.UnexpectedToken;
-
-        if (token) {
-            if (!message) {
-                msg = (token.type === Token.EOF) ? Messages.UnexpectedEOS :
-                    (token.type === Token.Identifier) ? Messages.UnexpectedIdentifier :
-                    (token.type === Token.NumericLiteral) ? Messages.UnexpectedNumber :
-                    (token.type === Token.StringLiteral) ? Messages.UnexpectedString :
-                    (token.type === Token.Template) ? Messages.UnexpectedTemplate :
-                    Messages.UnexpectedToken;
-
-                if (token.type === Token.Keyword) {
-                    if (isFutureReservedWord(token.value)) {
-                        msg = Messages.UnexpectedReserved;
-                    } else if (strict && isStrictModeReservedWord(token.value)) {
-                        msg = Messages.StrictReservedWord;
-                    }
-                }
-            }
-
-            value = (token.type === Token.Template) ? token.value.raw : token.value;
-        } else {
-            value = 'ILLEGAL';
-        }
-
-        msg = msg.replace('%0', value);
-
-        return (token && typeof token.lineNumber === 'number') ?
-            createError(token.lineNumber, token.start, msg) :
-            createError(scanning ? lineNumber : lastLineNumber, scanning ? index : lastIndex, msg);
-    }
-
-    function throwUnexpectedToken(token, message) {
-        throw unexpectedTokenError(token, message);
-    }
-
-    function tolerateUnexpectedToken(token, message) {
-        var error = unexpectedTokenError(token, message);
-        if (extra.errors) {
-            recordError(error);
-        } else {
-            throw error;
-        }
-    }
-
-    // Expect the next token to match the specified punctuator.
-    // If not, an exception will be thrown.
-
-    function expect(value) {
-        var token = lex();
-        if (token.type !== Token.Punctuator || token.value !== value) {
-            throwUnexpectedToken(token);
-        }
-    }
-
-    /**
-     * @name expectCommaSeparator
-     * @description Quietly expect a comma when in tolerant mode, otherwise delegates
-     * to <code>expect(value)</code>
-     * @since 2.0
-     */
-    function expectCommaSeparator() {
-        var token;
-
-        if (extra.errors) {
-            token = lookahead;
-            if (token.type === Token.Punctuator && token.value === ',') {
-                lex();
-            } else if (token.type === Token.Punctuator && token.value === ';') {
-                lex();
-                tolerateUnexpectedToken(token);
-            } else {
-                tolerateUnexpectedToken(token, Messages.UnexpectedToken);
-            }
-        } else {
-            expect(',');
-        }
-    }
-
-    // Expect the next token to match the specified keyword.
-    // If not, an exception will be thrown.
-
-    function expectKeyword(keyword) {
-        var token = lex();
-        if (token.type !== Token.Keyword || token.value !== keyword) {
-            throwUnexpectedToken(token);
-        }
-    }
-
-    // Return true if the next token matches the specified punctuator.
-
-    function match(value) {
-        return lookahead.type === Token.Punctuator && lookahead.value === value;
-    }
-
-    // Return true if the next token matches the specified keyword
-
-    function matchKeyword(keyword) {
-        return lookahead.type === Token.Keyword && lookahead.value === keyword;
-    }
-
-    // Return true if the next token matches the specified contextual keyword
-    // (where an identifier is sometimes a keyword depending on the context)
-
-    function matchContextualKeyword(keyword) {
-        return lookahead.type === Token.Identifier && lookahead.value === keyword;
-    }
-
-    // Return true if the next token is an assignment operator
-
-    function matchAssign() {
-        var op;
-
-        if (lookahead.type !== Token.Punctuator) {
-            return false;
-        }
-        op = lookahead.value;
-        return op === '=' ||
-            op === '*=' ||
-            op === '/=' ||
-            op === '%=' ||
-            op === '+=' ||
-            op === '-=' ||
-            op === '<<=' ||
-            op === '>>=' ||
-            op === '>>>=' ||
-            op === '&=' ||
-            op === '^=' ||
-            op === '|=';
-    }
-
-    function consumeSemicolon() {
-        // Catch the very common case first: immediately a semicolon (U+003B).
-        if (source.charCodeAt(startIndex) === 0x3B || match(';')) {
-            lex();
-            return;
-        }
-
-        if (hasLineTerminator) {
-            return;
-        }
-
-        // FIXME(ikarienator): this is seemingly an issue in the previous location info convention.
-        lastIndex = startIndex;
-        lastLineNumber = startLineNumber;
-        lastLineStart = startLineStart;
-
-        if (lookahead.type !== Token.EOF && !match('}')) {
-            throwUnexpectedToken(lookahead);
-        }
-    }
-
-    // Cover grammar support.
-    //
-    // When an assignment expression position starts with an left parenthesis, the determination of the type
-    // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead)
-    // or the first comma. This situation also defers the determination of all the expressions nested in the pair.
-    //
-    // There are three productions that can be parsed in a parentheses pair that needs to be determined
-    // after the outermost pair is closed. They are:
-    //
-    //   1. AssignmentExpression
-    //   2. BindingElements
-    //   3. AssignmentTargets
-    //
-    // In order to avoid exponential backtracking, we use two flags to denote if the production can be
-    // binding element or assignment target.
-    //
-    // The three productions have the relationship:
-    //
-    //   BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression
-    //
-    // with a single exception that CoverInitializedName when used directly in an Expression, generates
-    // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the
-    // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair.
-    //
-    // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not
-    // effect the current flags. This means the production the parser parses is only used as an expression. Therefore
-    // the CoverInitializedName check is conducted.
-    //
-    // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates
-    // the flags outside of the parser. This means the production the parser parses is used as a part of a potential
-    // pattern. The CoverInitializedName check is deferred.
-    function isolateCoverGrammar(parser) {
-        var oldIsBindingElement = isBindingElement,
-            oldIsAssignmentTarget = isAssignmentTarget,
-            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,
-            result;
-        isBindingElement = true;
-        isAssignmentTarget = true;
-        firstCoverInitializedNameError = null;
-        result = parser();
-        if (firstCoverInitializedNameError !== null) {
-            throwUnexpectedToken(firstCoverInitializedNameError);
-        }
-        isBindingElement = oldIsBindingElement;
-        isAssignmentTarget = oldIsAssignmentTarget;
-        firstCoverInitializedNameError = oldFirstCoverInitializedNameError;
-        return result;
-    }
-
-    function inheritCoverGrammar(parser) {
-        var oldIsBindingElement = isBindingElement,
-            oldIsAssignmentTarget = isAssignmentTarget,
-            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,
-            result;
-        isBindingElement = true;
-        isAssignmentTarget = true;
-        firstCoverInitializedNameError = null;
-        result = parser();
-        isBindingElement = isBindingElement && oldIsBindingElement;
-        isAssignmentTarget = isAssignmentTarget && oldIsAssignmentTarget;
-        firstCoverInitializedNameError = oldFirstCoverInitializedNameError || firstCoverInitializedNameError;
-        return result;
-    }
-
-    // ECMA-262 13.3.3 Destructuring Binding Patterns
-
-    function parseArrayPattern(params, kind) {
-        var node = new Node(), elements = [], rest, restNode;
-        expect('[');
-
-        while (!match(']')) {
-            if (match(',')) {
-                lex();
-                elements.push(null);
-            } else {
-                if (match('...')) {
-                    restNode = new Node();
-                    lex();
-                    params.push(lookahead);
-                    rest = parseVariableIdentifier(kind);
-                    elements.push(restNode.finishRestElement(rest));
-                    break;
-                } else {
-                    elements.push(parsePatternWithDefault(params, kind));
-                }
-                if (!match(']')) {
-                    expect(',');
-                }
-            }
-
-        }
-
-        expect(']');
-
-        return node.finishArrayPattern(elements);
-    }
-
-    function parsePropertyPattern(params, kind) {
-        var node = new Node(), key, keyToken, computed = match('['), init;
-        if (lookahead.type === Token.Identifier) {
-            keyToken = lookahead;
-            key = parseVariableIdentifier();
-            if (match('=')) {
-                params.push(keyToken);
-                lex();
-                init = parseAssignmentExpression();
-
-                return node.finishProperty(
-                    'init', key, false,
-                    new WrappingNode(keyToken).finishAssignmentPattern(key, init), false, false);
-            } else if (!match(':')) {
-                params.push(keyToken);
-                return node.finishProperty('init', key, false, key, false, true);
-            }
-        } else {
-            key = parseObjectPropertyKey();
-        }
-        expect(':');
-        init = parsePatternWithDefault(params, kind);
-        return node.finishProperty('init', key, computed, init, false, false);
-    }
-
-    function parseObjectPattern(params, kind) {
-        var node = new Node(), properties = [];
-
-        expect('{');
-
-        while (!match('}')) {
-            properties.push(parsePropertyPattern(params, kind));
-            if (!match('}')) {
-                expect(',');
-            }
-        }
-
-        lex();
-
-        return node.finishObjectPattern(properties);
-    }
-
-    function parsePattern(params, kind) {
-        if (match('[')) {
-            return parseArrayPattern(params, kind);
-        } else if (match('{')) {
-            return parseObjectPattern(params, kind);
-        } else if (matchKeyword('let')) {
-            if (kind === 'const' || kind === 'let') {
-                tolerateUnexpectedToken(lookahead, Messages.UnexpectedToken);
-            }
-        }
-
-        params.push(lookahead);
-        return parseVariableIdentifier(kind);
-    }
-
-    function parsePatternWithDefault(params, kind) {
-        var startToken = lookahead, pattern, previousAllowYield, right;
-        pattern = parsePattern(params, kind);
-        if (match('=')) {
-            lex();
-            previousAllowYield = state.allowYield;
-            state.allowYield = true;
-            right = isolateCoverGrammar(parseAssignmentExpression);
-            state.allowYield = previousAllowYield;
-            pattern = new WrappingNode(startToken).finishAssignmentPattern(pattern, right);
-        }
-        return pattern;
-    }
-
-    // ECMA-262 12.2.5 Array Initializer
-
-    function parseArrayInitializer() {
-        var elements = [], node = new Node(), restSpread;
-
-        expect('[');
-
-        while (!match(']')) {
-            if (match(',')) {
-                lex();
-                elements.push(null);
-            } else if (match('...')) {
-                restSpread = new Node();
-                lex();
-                restSpread.finishSpreadElement(inheritCoverGrammar(parseAssignmentExpression));
-
-                if (!match(']')) {
-                    isAssignmentTarget = isBindingElement = false;
-                    expect(',');
-                }
-                elements.push(restSpread);
-            } else {
-                elements.push(inheritCoverGrammar(parseAssignmentExpression));
-
-                if (!match(']')) {
-                    expect(',');
-                }
-            }
-        }
-
-        lex();
-
-        return node.finishArrayExpression(elements);
-    }
-
-    // ECMA-262 12.2.6 Object Initializer
-
-    function parsePropertyFunction(node, paramInfo, isGenerator) {
-        var previousStrict, body;
-
-        isAssignmentTarget = isBindingElement = false;
-
-        previousStrict = strict;
-        body = isolateCoverGrammar(parseFunctionSourceElements);
-
-        if (strict && paramInfo.firstRestricted) {
-            tolerateUnexpectedToken(paramInfo.firstRestricted, paramInfo.message);
-        }
-        if (strict && paramInfo.stricted) {
-            tolerateUnexpectedToken(paramInfo.stricted, paramInfo.message);
-        }
-
-        strict = previousStrict;
-        return node.finishFunctionExpression(null, paramInfo.params, paramInfo.defaults, body, isGenerator);
-    }
-
-    function parsePropertyMethodFunction() {
-        var params, method, node = new Node(),
-            previousAllowYield = state.allowYield;
-
-        state.allowYield = false;
-        params = parseParams();
-        state.allowYield = previousAllowYield;
-
-        state.allowYield = false;
-        method = parsePropertyFunction(node, params, false);
-        state.allowYield = previousAllowYield;
-
-        return method;
-    }
-
-    function parseObjectPropertyKey() {
-        var token, node = new Node(), expr;
-
-        token = lex();
-
-        // Note: This function is called only from parseObjectProperty(), where
-        // EOF and Punctuator tokens are already filtered out.
-
-        switch (token.type) {
-        case Token.StringLiteral:
-        case Token.NumericLiteral:
-            if (strict && token.octal) {
-                tolerateUnexpectedToken(token, Messages.StrictOctalLiteral);
-            }
-            return node.finishLiteral(token);
-        case Token.Identifier:
-        case Token.BooleanLiteral:
-        case Token.NullLiteral:
-        case Token.Keyword:
-            return node.finishIdentifier(token.value);
-        case Token.Punctuator:
-            if (token.value === '[') {
-                expr = isolateCoverGrammar(parseAssignmentExpression);
-                expect(']');
-                return expr;
-            }
-            break;
-        }
-        throwUnexpectedToken(token);
-    }
-
-    function lookaheadPropertyName() {
-        switch (lookahead.type) {
-        case Token.Identifier:
-        case Token.StringLiteral:
-        case Token.BooleanLiteral:
-        case Token.NullLiteral:
-        case Token.NumericLiteral:
-        case Token.Keyword:
-            return true;
-        case Token.Punctuator:
-            return lookahead.value === '[';
-        }
-        return false;
-    }
-
-    // This function is to try to parse a MethodDefinition as defined in 14.3. But in the case of object literals,
-    // it might be called at a position where there is in fact a short hand identifier pattern or a data property.
-    // This can only be determined after we consumed up to the left parentheses.
-    //
-    // In order to avoid back tracking, it returns `null` if the position is not a MethodDefinition and the caller
-    // is responsible to visit other options.
-    function tryParseMethodDefinition(token, key, computed, node) {
-        var value, options, methodNode, params,
-            previousAllowYield = state.allowYield;
-
-        if (token.type === Token.Identifier) {
-            // check for `get` and `set`;
-
-            if (token.value === 'get' && lookaheadPropertyName()) {
-                computed = match('[');
-                key = parseObjectPropertyKey();
-                methodNode = new Node();
-                expect('(');
-                expect(')');
-
-                state.allowYield = false;
-                value = parsePropertyFunction(methodNode, {
-                    params: [],
-                    defaults: [],
-                    stricted: null,
-                    firstRestricted: null,
-                    message: null
-                }, false);
-                state.allowYield = previousAllowYield;
-
-                return node.finishProperty('get', key, computed, value, false, false);
-            } else if (token.value === 'set' && lookaheadPropertyName()) {
-                computed = match('[');
-                key = parseObjectPropertyKey();
-                methodNode = new Node();
-                expect('(');
-
-                options = {
-                    params: [],
-                    defaultCount: 0,
-                    defaults: [],
-                    firstRestricted: null,
-                    paramSet: {}
-                };
-                if (match(')')) {
-                    tolerateUnexpectedToken(lookahead);
-                } else {
-                    state.allowYield = false;
-                    parseParam(options);
-                    state.allowYield = previousAllowYield;
-                    if (options.defaultCount === 0) {
-                        options.defaults = [];
-                    }
-                }
-                expect(')');
-
-                state.allowYield = false;
-                value = parsePropertyFunction(methodNode, options, false);
-                state.allowYield = previousAllowYield;
-
-                return node.finishProperty('set', key, computed, value, false, false);
-            }
-        } else if (token.type === Token.Punctuator && token.value === '*' && lookaheadPropertyName()) {
-            computed = match('[');
-            key = parseObjectPropertyKey();
-            methodNode = new Node();
-
-            state.allowYield = true;
-            params = parseParams();
-            state.allowYield = previousAllowYield;
-
-            state.allowYield = false;
-            value = parsePropertyFunction(methodNode, params, true);
-            state.allowYield = previousAllowYield;
-
-            return node.finishProperty('init', key, computed, value, true, false);
-        }
-
-        if (key && match('(')) {
-            value = parsePropertyMethodFunction();
-            return node.finishProperty('init', key, computed, value, true, false);
-        }
-
-        // Not a MethodDefinition.
-        return null;
-    }
-
-    function parseObjectProperty(hasProto) {
-        var token = lookahead, node = new Node(), computed, key, maybeMethod, proto, value;
-
-        computed = match('[');
-        if (match('*')) {
-            lex();
-        } else {
-            key = parseObjectPropertyKey();
-        }
-        maybeMethod = tryParseMethodDefinition(token, key, computed, node);
-        if (maybeMethod) {
-            return maybeMethod;
-        }
-
-        if (!key) {
-            throwUnexpectedToken(lookahead);
-        }
-
-        // Check for duplicated __proto__
-        if (!computed) {
-            proto = (key.type === Syntax.Identifier && key.name === '__proto__') ||
-                (key.type === Syntax.Literal && key.value === '__proto__');
-            if (hasProto.value && proto) {
-                tolerateError(Messages.DuplicateProtoProperty);
-            }
-            hasProto.value |= proto;
-        }
-
-        if (match(':')) {
-            lex();
-            value = inheritCoverGrammar(parseAssignmentExpression);
-            return node.finishProperty('init', key, computed, value, false, false);
-        }
-
-        if (token.type === Token.Identifier) {
-            if (match('=')) {
-                firstCoverInitializedNameError = lookahead;
-                lex();
-                value = isolateCoverGrammar(parseAssignmentExpression);
-                return node.finishProperty('init', key, computed,
-                    new WrappingNode(token).finishAssignmentPattern(key, value), false, true);
-            }
-            return node.finishProperty('init', key, computed, key, false, true);
-        }
-
-        throwUnexpectedToken(lookahead);
-    }
-
-    function parseObjectInitializer() {
-        var properties = [], hasProto = {value: false}, node = new Node();
-
-        expect('{');
-
-        while (!match('}')) {
-            properties.push(parseObjectProperty(hasProto));
-
-            if (!match('}')) {
-                expectCommaSeparator();
-            }
-        }
-
-        expect('}');
-
-        return node.finishObjectExpression(properties);
-    }
-
-    function reinterpretExpressionAsPattern(expr) {
-        var i;
-        switch (expr.type) {
-        case Syntax.Identifier:
-        case Syntax.MemberExpression:
-        case Syntax.RestElement:
-        case Syntax.AssignmentPattern:
-            break;
-        case Syntax.SpreadElement:
-            expr.type = Syntax.RestElement;
-            reinterpretExpressionAsPattern(expr.argument);
-            break;
-        case Syntax.ArrayExpression:
-            expr.type = Syntax.ArrayPattern;
-            for (i = 0; i < expr.elements.length; i++) {
-                if (expr.elements[i] !== null) {
-                    reinterpretExpressionAsPattern(expr.elements[i]);
-                }
-            }
-            break;
-        case Syntax.ObjectExpression:
-            expr.type = Syntax.ObjectPattern;
-            for (i = 0; i < expr.properties.length; i++) {
-                reinterpretExpressionAsPattern(expr.properties[i].value);
-            }
-            break;
-        case Syntax.AssignmentExpression:
-            expr.type = Syntax.AssignmentPattern;
-            reinterpretExpressionAsPattern(expr.left);
-            break;
-        default:
-            // Allow other node type for tolerant parsing.
-            break;
-        }
-    }
-
-    // ECMA-262 12.2.9 Template Literals
-
-    function parseTemplateElement(option) {
-        var node, token;
-
-        if (lookahead.type !== Token.Template || (option.head && !lookahead.head)) {
-            throwUnexpectedToken();
-        }
-
-        node = new Node();
-        token = lex();
-
-        return node.finishTemplateElement({ raw: token.value.raw, cooked: token.value.cooked }, token.tail);
-    }
-
-    function parseTemplateLiteral() {
-        var quasi, quasis, expressions, node = new Node();
-
-        quasi = parseTemplateElement({ head: true });
-        quasis = [quasi];
-        expressions = [];
-
-        while (!quasi.tail) {
-            expressions.push(parseExpression());
-            quasi = parseTemplateElement({ head: false });
-            quasis.push(quasi);
-        }
-
-        return node.finishTemplateLiteral(quasis, expressions);
-    }
-
-    // ECMA-262 12.2.10 The Grouping Operator
-
-    function parseGroupExpression() {
-        var expr, expressions, startToken, i, params = [];
-
-        expect('(');
-
-        if (match(')')) {
-            lex();
-            if (!match('=>')) {
-                expect('=>');
-            }
-            return {
-                type: PlaceHolders.ArrowParameterPlaceHolder,
-                params: [],
-                rawParams: []
-            };
-        }
-
-        startToken = lookahead;
-        if (match('...')) {
-            expr = parseRestElement(params);
-            expect(')');
-            if (!match('=>')) {
-                expect('=>');
-            }
-            return {
-                type: PlaceHolders.ArrowParameterPlaceHolder,
-                params: [expr]
-            };
-        }
-
-        isBindingElement = true;
-        expr = inheritCoverGrammar(parseAssignmentExpression);
-
-        if (match(',')) {
-            isAssignmentTarget = false;
-            expressions = [expr];
-
-            while (startIndex < length) {
-                if (!match(',')) {
-                    break;
-                }
-                lex();
-
-                if (match('...')) {
-                    if (!isBindingElement) {
-                        throwUnexpectedToken(lookahead);
-                    }
-                    expressions.push(parseRestElement(params));
-                    expect(')');
-                    if (!match('=>')) {
-                        expect('=>');
-                    }
-                    isBindingElement = false;
-                    for (i = 0; i < expressions.length; i++) {
-                        reinterpretExpressionAsPattern(expressions[i]);
-                    }
-                    return {
-                        type: PlaceHolders.ArrowParameterPlaceHolder,
-                        params: expressions
-                    };
-                }
-
-                expressions.push(inheritCoverGrammar(parseAssignmentExpression));
-            }
-
-            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);
-        }
-
-
-        expect(')');
-
-        if (match('=>')) {
-            if (expr.type === Syntax.Identifier && expr.name === 'yield') {
-                return {
-                    type: PlaceHolders.ArrowParameterPlaceHolder,
-                    params: [expr]
-                };
-            }
-
-            if (!isBindingElement) {
-                throwUnexpectedToken(lookahead);
-            }
-
-            if (expr.type === Syntax.SequenceExpression) {
-                for (i = 0; i < expr.expressions.length; i++) {
-                    reinterpretExpressionAsPattern(expr.expressions[i]);
-                }
-            } else {
-                reinterpretExpressionAsPattern(expr);
-            }
-
-            expr = {
-                type: PlaceHolders.ArrowParameterPlaceHolder,
-                params: expr.type === Syntax.SequenceExpression ? expr.expressions : [expr]
-            };
-        }
-        isBindingElement = false;
-        return expr;
-    }
-
-
-    // ECMA-262 12.2 Primary Expressions
-
-    function parsePrimaryExpression() {
-        var type, token, expr, node;
-
-        if (match('(')) {
-            isBindingElement = false;
-            return inheritCoverGrammar(parseGroupExpression);
-        }
-
-        if (match('[')) {
-            return inheritCoverGrammar(parseArrayInitializer);
-        }
-
-        if (match('{')) {
-            return inheritCoverGrammar(parseObjectInitializer);
-        }
-
-        type = lookahead.type;
-        node = new Node();
-
-        if (type === Token.Identifier) {
-            if (state.sourceType === 'module' && lookahead.value === 'await') {
-                tolerateUnexpectedToken(lookahead);
-            }
-            expr = node.finishIdentifier(lex().value);
-        } else if (type === Token.StringLiteral || type === Token.NumericLiteral) {
-            isAssignmentTarget = isBindingElement = false;
-            if (strict && lookahead.octal) {
-                tolerateUnexpectedToken(lookahead, Messages.StrictOctalLiteral);
-            }
-            expr = node.finishLiteral(lex());
-        } else if (type === Token.Keyword) {
-            if (!strict && state.allowYield && matchKeyword('yield')) {
-                return parseNonComputedProperty();
-            }
-            isAssignmentTarget = isBindingElement = false;
-            if (matchKeyword('function')) {
-                return parseFunctionExpression();
-            }
-            if (matchKeyword('this')) {
-                lex();
-                return node.finishThisExpression();
-            }
-            if (matchKeyword('class')) {
-                return parseClassExpression();
-            }
-            if (!strict && matchKeyword('let')) {
-                return node.finishIdentifier(lex().value);
-            }
-            throwUnexpectedToken(lex());
-        } else if (type === Token.BooleanLiteral) {
-            isAssignmentTarget = isBindingElement = false;
-            token = lex();
-            token.value = (token.value === 'true');
-            expr = node.finishLiteral(token);
-        } else if (type === Token.NullLiteral) {
-            isAssignmentTarget = isBindingElement = false;
-            token = lex();
-            token.value = null;
-            expr = node.finishLiteral(token);
-        } else if (match('/') || match('/=')) {
-            isAssignmentTarget = isBindingElement = false;
-            index = startIndex;
-
-            if (typeof extra.tokens !== 'undefined') {
-                token = collectRegex();
-            } else {
-                token = scanRegExp();
-            }
-            lex();
-            expr = node.finishLiteral(token);
-        } else if (type === Token.Template) {
-            expr = parseTemplateLiteral();
-        } else {
-            throwUnexpectedToken(lex());
-        }
-
-        return expr;
-    }
-
-    // ECMA-262 12.3 Left-Hand-Side Expressions
-
-    function parseArguments() {
-        var args = [], expr;
-
-        expect('(');
-
-        if (!match(')')) {
-            while (startIndex < length) {
-                if (match('...')) {
-                    expr = new Node();
-                    lex();
-                    expr.finishSpreadElement(isolateCoverGrammar(parseAssignmentExpression));
-                } else {
-                    expr = isolateCoverGrammar(parseAssignmentExpression);
-                }
-                args.push(expr);
-                if (match(')')) {
-                    break;
-                }
-                expectCommaSeparator();
-            }
-        }
-
-        expect(')');
-
-        return args;
-    }
-
-    function parseNonComputedProperty() {
-        var token, node = new Node();
-
-        token = lex();
-
-        if (!isIdentifierName(token)) {
-            throwUnexpectedToken(token);
-        }
-
-        return node.finishIdentifier(token.value);
-    }
-
-    function parseNonComputedMember() {
-        expect('.');
-
-        return parseNonComputedProperty();
-    }
-
-    function parseComputedMember() {
-        var expr;
-
-        expect('[');
-
-        expr = isolateCoverGrammar(parseExpression);
-
-        expect(']');
-
-        return expr;
-    }
-
-    // ECMA-262 12.3.3 The new Operator
-
-    function parseNewExpression() {
-        var callee, args, node = new Node();
-
-        expectKeyword('new');
-
-        if (match('.')) {
-            lex();
-            if (lookahead.type === Token.Identifier && lookahead.value === 'target') {
-                if (state.inFunctionBody) {
-                    lex();
-                    return node.finishMetaProperty('new', 'target');
-                }
-            }
-            throwUnexpectedToken(lookahead);
-        }
-
-        callee = isolateCoverGrammar(parseLeftHandSideExpression);
-        args = match('(') ? parseArguments() : [];
-
-        isAssignmentTarget = isBindingElement = false;
-
-        return node.finishNewExpression(callee, args);
-    }
-
-    // ECMA-262 12.3.4 Function Calls
-
-    function parseLeftHandSideExpressionAllowCall() {
-        var quasi, expr, args, property, startToken, previousAllowIn = state.allowIn;
-
-        startToken = lookahead;
-        state.allowIn = true;
-
-        if (matchKeyword('super') && state.inFunctionBody) {
-            expr = new Node();
-            lex();
-            expr = expr.finishSuper();
-            if (!match('(') && !match('.') && !match('[')) {
-                throwUnexpectedToken(lookahead);
-            }
-        } else {
-            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);
-        }
-
-        for (;;) {
-            if (match('.')) {
-                isBindingElement = false;
-                isAssignmentTarget = true;
-                property = parseNonComputedMember();
-                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);
-            } else if (match('(')) {
-                isBindingElement = false;
-                isAssignmentTarget = false;
-                args = parseArguments();
-                expr = new WrappingNode(startToken).finishCallExpression(expr, args);
-            } else if (match('[')) {
-                isBindingElement = false;
-                isAssignmentTarget = true;
-                property = parseComputedMember();
-                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);
-            } else if (lookahead.type === Token.Template && lookahead.head) {
-                quasi = parseTemplateLiteral();
-                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);
-            } else {
-                break;
-            }
-        }
-        state.allowIn = previousAllowIn;
-
-        return expr;
-    }
-
-    // ECMA-262 12.3 Left-Hand-Side Expressions
-
-    function parseLeftHandSideExpression() {
-        var quasi, expr, property, startToken;
-        assert(state.allowIn, 'callee of new expression always allow in keyword.');
-
-        startToken = lookahead;
-
-        if (matchKeyword('super') && state.inFunctionBody) {
-            expr = new Node();
-            lex();
-            expr = expr.finishSuper();
-            if (!match('[') && !match('.')) {
-                throwUnexpectedToken(lookahead);
-            }
-        } else {
-            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);
-        }
-
-        for (;;) {
-            if (match('[')) {
-                isBindingElement = false;
-                isAssignmentTarget = true;
-                property = parseComputedMember();
-                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);
-            } else if (match('.')) {
-                isBindingElement = false;
-                isAssignmentTarget = true;
-                property = parseNonComputedMember();
-                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);
-            } else if (lookahead.type === Token.Template && lookahead.head) {
-                quasi = parseTemplateLiteral();
-                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);
-            } else {
-                break;
-            }
-        }
-        return expr;
-    }
-
-    // ECMA-262 12.4 Postfix Expressions
-
-    function parsePostfixExpression() {
-        var expr, token, startToken = lookahead;
-
-        expr = inheritCoverGrammar(parseLeftHandSideExpressionAllowCall);
-
-        if (!hasLineTerminator && lookahead.type === Token.Punctuator) {
-            if (match('++') || match('--')) {
-                // ECMA-262 11.3.1, 11.3.2
-                if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {
-                    tolerateError(Messages.StrictLHSPostfix);
-                }
-
-                if (!isAssignmentTarget) {
-                    tolerateError(Messages.InvalidLHSInAssignment);
-                }
-
-                isAssignmentTarget = isBindingElement = false;
-
-                token = lex();
-                expr = new WrappingNode(startToken).finishPostfixExpression(token.value, expr);
-            }
-        }
-
-        return expr;
-    }
-
-    // ECMA-262 12.5 Unary Operators
-
-    function parseUnaryExpression() {
-        var token, expr, startToken;
-
-        if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) {
-            expr = parsePostfixExpression();
-        } else if (match('++') || match('--')) {
-            startToken = lookahead;
-            token = lex();
-            expr = inheritCoverGrammar(parseUnaryExpression);
-            // ECMA-262 11.4.4, 11.4.5
-            if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {
-                tolerateError(Messages.StrictLHSPrefix);
-            }
-
-            if (!isAssignmentTarget) {
-                tolerateError(Messages.InvalidLHSInAssignment);
-            }
-            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);
-            isAssignmentTarget = isBindingElement = false;
-        } else if (match('+') || match('-') || match('~') || match('!')) {
-            startToken = lookahead;
-            token = lex();
-            expr = inheritCoverGrammar(parseUnaryExpression);
-            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);
-            isAssignmentTarget = isBindingElement = false;
-        } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {
-            startToken = lookahead;
-            token = lex();
-            expr = inheritCoverGrammar(parseUnaryExpression);
-            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);
-            if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) {
-                tolerateError(Messages.StrictDelete);
-            }
-            isAssignmentTarget = isBindingElement = false;
-        } else {
-            expr = parsePostfixExpression();
-        }
-
-        return expr;
-    }
-
-    function binaryPrecedence(token, allowIn) {
-        var prec = 0;
-
-        if (token.type !== Token.Punctuator && token.type !== Token.Keyword) {
-            return 0;
-        }
-
-        switch (token.value) {
-        case '||':
-            prec = 1;
-            break;
-
-        case '&&':
-            prec = 2;
-            break;
-
-        case '|':
-            prec = 3;
-            break;
-
-        case '^':
-            prec = 4;
-            break;
-
-        case '&':
-            prec = 5;
-            break;
-
-        case '==':
-        case '!=':
-        case '===':
-        case '!==':
-            prec = 6;
-            break;
-
-        case '<':
-        case '>':
-        case '<=':
-        case '>=':
-        case 'instanceof':
-            prec = 7;
-            break;
-
-        case 'in':
-            prec = allowIn ? 7 : 0;
-            break;
-
-        case '<<':
-        case '>>':
-        case '>>>':
-            prec = 8;
-            break;
-
-        case '+':
-        case '-':
-            prec = 9;
-            break;
-
-        case '*':
-        case '/':
-        case '%':
-            prec = 11;
-            break;
-
-        default:
-            break;
-        }
-
-        return prec;
-    }
-
-    // ECMA-262 12.6 Multiplicative Operators
-    // ECMA-262 12.7 Additive Operators
-    // ECMA-262 12.8 Bitwise Shift Operators
-    // ECMA-262 12.9 Relational Operators
-    // ECMA-262 12.10 Equality Operators
-    // ECMA-262 12.11 Binary Bitwise Operators
-    // ECMA-262 12.12 Binary Logical Operators
-
-    function parseBinaryExpression() {
-        var marker, markers, expr, token, prec, stack, right, operator, left, i;
-
-        marker = lookahead;
-        left = inheritCoverGrammar(parseUnaryExpression);
-
-        token = lookahead;
-        prec = binaryPrecedence(token, state.allowIn);
-        if (prec === 0) {
-            return left;
-        }
-        isAssignmentTarget = isBindingElement = false;
-        token.prec = prec;
-        lex();
-
-        markers = [marker, lookahead];
-        right = isolateCoverGrammar(parseUnaryExpression);
-
-        stack = [left, token, right];
-
-        while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 0) {
-
-            // Reduce: make a binary expression from the three topmost entries.
-            while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) {
-                right = stack.pop();
-                operator = stack.pop().value;
-                left = stack.pop();
-                markers.pop();
-                expr = new WrappingNode(markers[markers.length - 1]).finishBinaryExpression(operator, left, right);
-                stack.push(expr);
-            }
-
-            // Shift.
-            token = lex();
-            token.prec = prec;
-            stack.push(token);
-            markers.push(lookahead);
-            expr = isolateCoverGrammar(parseUnaryExpression);
-            stack.push(expr);
-        }
-
-        // Final reduce to clean-up the stack.
-        i = stack.length - 1;
-        expr = stack[i];
-        markers.pop();
-        while (i > 1) {
-            expr = new WrappingNode(markers.pop()).finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr);
-            i -= 2;
-        }
-
-        return expr;
-    }
-
-
-    // ECMA-262 12.13 Conditional Operator
-
-    function parseConditionalExpression() {
-        var expr, previousAllowIn, consequent, alternate, startToken;
-
-        startToken = lookahead;
-
-        expr = inheritCoverGrammar(parseBinaryExpression);
-        if (match('?')) {
-            lex();
-            previousAllowIn = state.allowIn;
-            state.allowIn = true;
-            consequent = isolateCoverGrammar(parseAssignmentExpression);
-            state.allowIn = previousAllowIn;
-            expect(':');
-            alternate = isolateCoverGrammar(parseAssignmentExpression);
-
-            expr = new WrappingNode(startToken).finishConditionalExpression(expr, consequent, alternate);
-            isAssignmentTarget = isBindingElement = false;
-        }
-
-        return expr;
-    }
-
-    // ECMA-262 14.2 Arrow Function Definitions
-
-    function parseConciseBody() {
-        if (match('{')) {
-            return parseFunctionSourceElements();
-        }
-        return isolateCoverGrammar(parseAssignmentExpression);
-    }
-
-    function checkPatternParam(options, param) {
-        var i;
-        switch (param.type) {
-        case Syntax.Identifier:
-            validateParam(options, param, param.name);
-            break;
-        case Syntax.RestElement:
-            checkPatternParam(options, param.argument);
-            break;
-        case Syntax.AssignmentPattern:
-            checkPatternParam(options, param.left);
-            break;
-        case Syntax.ArrayPattern:
-            for (i = 0; i < param.elements.length; i++) {
-                if (param.elements[i] !== null) {
-                    checkPatternParam(options, param.elements[i]);
-                }
-            }
-            break;
-        case Syntax.YieldExpression:
-            break;
-        default:
-            assert(param.type === Syntax.ObjectPattern, 'Invalid type');
-            for (i = 0; i < param.properties.length; i++) {
-                checkPatternParam(options, param.properties[i].value);
-            }
-            break;
-        }
-    }
-    function reinterpretAsCoverFormalsList(expr) {
-        var i, len, param, params, defaults, defaultCount, options, token;
-
-        defaults = [];
-        defaultCount = 0;
-        params = [expr];
-
-        switch (expr.type) {
-        case Syntax.Identifier:
-            break;
-        case PlaceHolders.ArrowParameterPlaceHolder:
-            params = expr.params;
-            break;
-        default:
-            return null;
-        }
-
-        options = {
-            paramSet: {}
-        };
-
-        for (i = 0, len = params.length; i < len; i += 1) {
-            param = params[i];
-            switch (param.type) {
-            case Syntax.AssignmentPattern:
-                params[i] = param.left;
-                if (param.right.type === Syntax.YieldExpression) {
-                    if (param.right.argument) {
-                        throwUnexpectedToken(lookahead);
-                    }
-                    param.right.type = Syntax.Identifier;
-                    param.right.name = 'yield';
-                    delete param.right.argument;
-                    delete param.right.delegate;
-                }
-                defaults.push(param.right);
-                ++defaultCount;
-                checkPatternParam(options, param.left);
-                break;
-            default:
-                checkPatternParam(options, param);
-                params[i] = param;
-                defaults.push(null);
-                break;
-            }
-        }
-
-        if (strict || !state.allowYield) {
-            for (i = 0, len = params.length; i < len; i += 1) {
-                param = params[i];
-                if (param.type === Syntax.YieldExpression) {
-                    throwUnexpectedToken(lookahead);
-                }
-            }
-        }
-
-        if (options.message === Messages.StrictParamDupe) {
-            token = strict ? options.stricted : options.firstRestricted;
-            throwUnexpectedToken(token, options.message);
-        }
-
-        if (defaultCount === 0) {
-            defaults = [];
-        }
-
-        return {
-            params: params,
-            defaults: defaults,
-            stricted: options.stricted,
-            firstRestricted: options.firstRestricted,
-            message: options.message
-        };
-    }
-
-    function parseArrowFunctionExpression(options, node) {
-        var previousStrict, previousAllowYield, body;
-
-        if (hasLineTerminator) {
-            tolerateUnexpectedToken(lookahead);
-        }
-        expect('=>');
-
-        previousStrict = strict;
-        previousAllowYield = state.allowYield;
-        state.allowYield = true;
-
-        body = parseConciseBody();
-
-        if (strict && options.firstRestricted) {
-            throwUnexpectedToken(options.firstRestricted, options.message);
-        }
-        if (strict && options.stricted) {
-            tolerateUnexpectedToken(options.stricted, options.message);
-        }
-
-        strict = previousStrict;
-        state.allowYield = previousAllowYield;
-
-        return node.finishArrowFunctionExpression(options.params, options.defaults, body, body.type !== Syntax.BlockStatement);
-    }
-
-    // ECMA-262 14.4 Yield expression
-
-    function parseYieldExpression() {
-        var argument, expr, delegate, previousAllowYield;
-
-        argument = null;
-        expr = new Node();
-
-        expectKeyword('yield');
-
-        if (!hasLineTerminator) {
-            previousAllowYield = state.allowYield;
-            state.allowYield = false;
-            delegate = match('*');
-            if (delegate) {
-                lex();
-                argument = parseAssignmentExpression();
-            } else {
-                if (!match(';') && !match('}') && !match(')') && lookahead.type !== Token.EOF) {
-                    argument = parseAssignmentExpression();
-                }
-            }
-            state.allowYield = previousAllowYield;
-        }
-
-        return expr.finishYieldExpression(argument, delegate);
-    }
-
-    // ECMA-262 12.14 Assignment Operators
-
-    function parseAssignmentExpression() {
-        var token, expr, right, list, startToken;
-
-        startToken = lookahead;
-        token = lookahead;
-
-        if (!state.allowYield && matchKeyword('yield')) {
-            return parseYieldExpression();
-        }
-
-        expr = parseConditionalExpression();
-
-        if (expr.type === PlaceHolders.ArrowParameterPlaceHolder || match('=>')) {
-            isAssignmentTarget = isBindingElement = false;
-            list = reinterpretAsCoverFormalsList(expr);
-
-            if (list) {
-                firstCoverInitializedNameError = null;
-                return parseArrowFunctionExpression(list, new WrappingNode(startToken));
-            }
-
-            return expr;
-        }
-
-        if (matchAssign()) {
-            if (!isAssignmentTarget) {
-                tolerateError(Messages.InvalidLHSInAssignment);
-            }
-
-            // ECMA-262 12.1.1
-            if (strict && expr.type === Syntax.Identifier) {
-                if (isRestrictedWord(expr.name)) {
-                    tolerateUnexpectedToken(token, Messages.StrictLHSAssignment);
-                }
-                if (isStrictModeReservedWord(expr.name)) {
-                    tolerateUnexpectedToken(token, Messages.StrictReservedWord);
-                }
-            }
-
-            if (!match('=')) {
-                isAssignmentTarget = isBindingElement = false;
-            } else {
-                reinterpretExpressionAsPattern(expr);
-            }
-
-            token = lex();
-            right = isolateCoverGrammar(parseAssignmentExpression);
-            expr = new WrappingNode(startToken).finishAssignmentExpression(token.value, expr, right);
-            firstCoverInitializedNameError = null;
-        }
-
-        return expr;
-    }
-
-    // ECMA-262 12.15 Comma Operator
-
-    function parseExpression() {
-        var expr, startToken = lookahead, expressions;
-
-        expr = isolateCoverGrammar(parseAssignmentExpression);
-
-        if (match(',')) {
-            expressions = [expr];
-
-            while (startIndex < length) {
-                if (!match(',')) {
-                    break;
-                }
-                lex();
-                expressions.push(isolateCoverGrammar(parseAssignmentExpression));
-            }
-
-            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);
-        }
-
-        return expr;
-    }
-
-    // ECMA-262 13.2 Block
-
-    function parseStatementListItem() {
-        if (lookahead.type === Token.Keyword) {
-            switch (lookahead.value) {
-            case 'export':
-                if (state.sourceType !== 'module') {
-                    tolerateUnexpectedToken(lookahead, Messages.IllegalExportDeclaration);
-                }
-                return parseExportDeclaration();
-            case 'import':
-                if (state.sourceType !== 'module') {
-                    tolerateUnexpectedToken(lookahead, Messages.IllegalImportDeclaration);
-                }
-                return parseImportDeclaration();
-            case 'const':
-                return parseLexicalDeclaration({inFor: false});
-            case 'function':
-                return parseFunctionDeclaration(new Node());
-            case 'class':
-                return parseClassDeclaration();
-            }
-        }
-
-        if (matchKeyword('let') && isLexicalDeclaration()) {
-            return parseLexicalDeclaration({inFor: false});
-        }
-
-        return parseStatement();
-    }
-
-    function parseStatementList() {
-        var list = [];
-        while (startIndex < length) {
-            if (match('}')) {
-                break;
-            }
-            list.push(parseStatementListItem());
-        }
-
-        return list;
-    }
-
-    function parseBlock() {
-        var block, node = new Node();
-
-        expect('{');
-
-        block = parseStatementList();
-
-        expect('}');
-
-        return node.finishBlockStatement(block);
-    }
-
-    // ECMA-262 13.3.2 Variable Statement
-
-    function parseVariableIdentifier(kind) {
-        var token, node = new Node();
-
-        token = lex();
-
-        if (token.type === Token.Keyword && token.value === 'yield') {
-            if (strict) {
-                tolerateUnexpectedToken(token, Messages.StrictReservedWord);
-            } if (!state.allowYield) {
-                throwUnexpectedToken(token);
-            }
-        } else if (token.type !== Token.Identifier) {
-            if (strict && token.type === Token.Keyword && isStrictModeReservedWord(token.value)) {
-                tolerateUnexpectedToken(token, Messages.StrictReservedWord);
-            } else {
-                if (strict || token.value !== 'let' || kind !== 'var') {
-                    throwUnexpectedToken(token);
-                }
-            }
-        } else if (state.sourceType === 'module' && token.type === Token.Identifier && token.value === 'await') {
-            tolerateUnexpectedToken(token);
-        }
-
-        return node.finishIdentifier(token.value);
-    }
-
-    function parseVariableDeclaration(options) {
-        var init = null, id, node = new Node(), params = [];
-
-        id = parsePattern(params, 'var');
-
-        // ECMA-262 12.2.1
-        if (strict && isRestrictedWord(id.name)) {
-            tolerateError(Messages.StrictVarName);
-        }
-
-        if (match('=')) {
-            lex();
-            init = isolateCoverGrammar(parseAssignmentExpression);
-        } else if (id.type !== Syntax.Identifier && !options.inFor) {
-            expect('=');
-        }
-
-        return node.finishVariableDeclarator(id, init);
-    }
-
-    function parseVariableDeclarationList(options) {
-        var list = [];
-
-        do {
-            list.push(parseVariableDeclaration({ inFor: options.inFor }));
-            if (!match(',')) {
-                break;
-            }
-            lex();
-        } while (startIndex < length);
-
-        return list;
-    }
-
-    function parseVariableStatement(node) {
-        var declarations;
-
-        expectKeyword('var');
-
-        declarations = parseVariableDeclarationList({ inFor: false });
-
-        consumeSemicolon();
-
-        return node.finishVariableDeclaration(declarations);
-    }
-
-    // ECMA-262 13.3.1 Let and Const Declarations
-
-    function parseLexicalBinding(kind, options) {
-        var init = null, id, node = new Node(), params = [];
-
-        id = parsePattern(params, kind);
-
-        // ECMA-262 12.2.1
-        if (strict && id.type === Syntax.Identifier && isRestrictedWord(id.name)) {
-            tolerateError(Messages.StrictVarName);
-        }
-
-        if (kind === 'const') {
-            if (!matchKeyword('in') && !matchContextualKeyword('of')) {
-                expect('=');
-                init = isolateCoverGrammar(parseAssignmentExpression);
-            }
-        } else if ((!options.inFor && id.type !== Syntax.Identifier) || match('=')) {
-            expect('=');
-            init = isolateCoverGrammar(parseAssignmentExpression);
-        }
-
-        return node.finishVariableDeclarator(id, init);
-    }
-
-    function parseBindingList(kind, options) {
-        var list = [];
-
-        do {
-            list.push(parseLexicalBinding(kind, options));
-            if (!match(',')) {
-                break;
-            }
-            lex();
-        } while (startIndex < length);
-
-        return list;
-    }
-
-
-    function tokenizerState() {
-        return {
-            index: index,
-            lineNumber: lineNumber,
-            lineStart: lineStart,
-            hasLineTerminator: hasLineTerminator,
-            lastIndex: lastIndex,
-            lastLineNumber: lastLineNumber,
-            lastLineStart: lastLineStart,
-            startIndex: startIndex,
-            startLineNumber: startLineNumber,
-            startLineStart: startLineStart,
-            lookahead: lookahead,
-            tokenCount: extra.tokens ? extra.tokens.length : 0
-        };
-    }
-
-    function resetTokenizerState(ts) {
-        index = ts.index;
-        lineNumber = ts.lineNumber;
-        lineStart = ts.lineStart;
-        hasLineTerminator = ts.hasLineTerminator;
-        lastIndex = ts.lastIndex;
-        lastLineNumber = ts.lastLineNumber;
-        lastLineStart = ts.lastLineStart;
-        startIndex = ts.startIndex;
-        startLineNumber = ts.startLineNumber;
-        startLineStart = ts.startLineStart;
-        lookahead = ts.lookahead;
-        if (extra.tokens) {
-            extra.tokens.splice(ts.tokenCount, extra.tokens.length);
-        }
-    }
-
-    function isLexicalDeclaration() {
-        var lexical, ts;
-
-        ts = tokenizerState();
-
-        lex();
-        lexical = (lookahead.type === Token.Identifier) || match('[') || match('{') ||
-            matchKeyword('let') || matchKeyword('yield');
-
-        resetTokenizerState(ts);
-
-        return lexical;
-    }
-
-    function parseLexicalDeclaration(options) {
-        var kind, declarations, node = new Node();
-
-        kind = lex().value;
-        assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const');
-
-        declarations = parseBindingList(kind, options);
-
-        consumeSemicolon();
-
-        return node.finishLexicalDeclaration(declarations, kind);
-    }
-
-    function parseRestElement(params) {
-        var param, node = new Node();
-
-        lex();
-
-        if (match('{')) {
-            throwError(Messages.ObjectPatternAsRestParameter);
-        }
-
-        params.push(lookahead);
-
-        param = parseVariableIdentifier();
-
-        if (match('=')) {
-            throwError(Messages.DefaultRestParameter);
-        }
-
-        if (!match(')')) {
-            throwError(Messages.ParameterAfterRestParameter);
-        }
-
-        return node.finishRestElement(param);
-    }
-
-    // ECMA-262 13.4 Empty Statement
-
-    function parseEmptyStatement(node) {
-        expect(';');
-        return node.finishEmptyStatement();
-    }
-
-    // ECMA-262 12.4 Expression Statement
-
-    function parseExpressionStatement(node) {
-        var expr = parseExpression();
-        consumeSemicolon();
-        return node.finishExpressionStatement(expr);
-    }
-
-    // ECMA-262 13.6 If statement
-
-    function parseIfStatement(node) {
-        var test, consequent, alternate;
-
-        expectKeyword('if');
-
-        expect('(');
-
-        test = parseExpression();
-
-        expect(')');
-
-        consequent = parseStatement();
-
-        if (matchKeyword('else')) {
-            lex();
-            alternate = parseStatement();
-        } else {
-            alternate = null;
-        }
-
-        return node.finishIfStatement(test, consequent, alternate);
-    }
-
-    // ECMA-262 13.7 Iteration Statements
-
-    function parseDoWhileStatement(node) {
-        var body, test, oldInIteration;
-
-        expectKeyword('do');
-
-        oldInIteration = state.inIteration;
-        state.inIteration = true;
-
-        body = parseStatement();
-
-        state.inIteration = oldInIteration;
-
-        expectKeyword('while');
-
-        expect('(');
-
-        test = parseExpression();
-
-        expect(')');
-
-        if (match(';')) {
-            lex();
-        }
-
-        return node.finishDoWhileStatement(body, test);
-    }
-
-    function parseWhileStatement(node) {
-        var test, body, oldInIteration;
-
-        expectKeyword('while');
-
-        expect('(');
-
-        test = parseExpression();
-
-        expect(')');
-
-        oldInIteration = state.inIteration;
-        state.inIteration = true;
-
-        body = parseStatement();
-
-        state.inIteration = oldInIteration;
-
-        return node.finishWhileStatement(test, body);
-    }
-
-    function parseForStatement(node) {
-        var init, forIn, initSeq, initStartToken, test, update, left, right, kind, declarations,
-            body, oldInIteration, previousAllowIn = state.allowIn;
-
-        init = test = update = null;
-        forIn = true;
-
-        expectKeyword('for');
-
-        expect('(');
-
-        if (match(';')) {
-            lex();
-        } else {
-            if (matchKeyword('var')) {
-                init = new Node();
-                lex();
-
-                state.allowIn = false;
-                declarations = parseVariableDeclarationList({ inFor: true });
-                state.allowIn = previousAllowIn;
-
-                if (declarations.length === 1 && matchKeyword('in')) {
-                    init = init.finishVariableDeclaration(declarations);
-                    lex();
-                    left = init;
-                    right = parseExpression();
-                    init = null;
-                } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {
-                    init = init.finishVariableDeclaration(declarations);
-                    lex();
-                    left = init;
-                    right = parseAssignmentExpression();
-                    init = null;
-                    forIn = false;
-                } else {
-                    init = init.finishVariableDeclaration(declarations);
-                    expect(';');
-                }
-            } else if (matchKeyword('const') || matchKeyword('let')) {
-                init = new Node();
-                kind = lex().value;
-
-                if (!strict && lookahead.value === 'in') {
-                    init = init.finishIdentifier(kind);
-                    lex();
-                    left = init;
-                    right = parseExpression();
-                    init = null;
-                } else {
-                    state.allowIn = false;
-                    declarations = parseBindingList(kind, {inFor: true});
-                    state.allowIn = previousAllowIn;
-
-                    if (declarations.length === 1 && declarations[0].init === null && matchKeyword('in')) {
-                        init = init.finishLexicalDeclaration(declarations, kind);
-                        lex();
-                        left = init;
-                        right = parseExpression();
-                        init = null;
-                    } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {
-                        init = init.finishLexicalDeclaration(declarations, kind);
-                        lex();
-                        left = init;
-                        right = parseAssignmentExpression();
-                        init = null;
-                        forIn = false;
-                    } else {
-                        consumeSemicolon();
-                        init = init.finishLexicalDeclaration(declarations, kind);
-                    }
-                }
-            } else {
-                initStartToken = lookahead;
-                state.allowIn = false;
-                init = inheritCoverGrammar(parseAssignmentExpression);
-                state.allowIn = previousAllowIn;
-
-                if (matchKeyword('in')) {
-                    if (!isAssignmentTarget) {
-                        tolerateError(Messages.InvalidLHSInForIn);
-                    }
-
-                    lex();
-                    reinterpretExpressionAsPattern(init);
-                    left = init;
-                    right = parseExpression();
-                    init = null;
-                } else if (matchContextualKeyword('of')) {
-                    if (!isAssignmentTarget) {
-                        tolerateError(Messages.InvalidLHSInForLoop);
-                    }
-
-                    lex();
-                    reinterpretExpressionAsPattern(init);
-                    left = init;
-                    right = parseAssignmentExpression();
-                    init = null;
-                    forIn = false;
-                } else {
-                    if (match(',')) {
-                        initSeq = [init];
-                        while (match(',')) {
-                            lex();
-                            initSeq.push(isolateCoverGrammar(parseAssignmentExpression));
-                        }
-                        init = new WrappingNode(initStartToken).finishSequenceExpression(initSeq);
-                    }
-                    expect(';');
-                }
-            }
-        }
-
-        if (typeof left === 'undefined') {
-
-            if (!match(';')) {
-                test = parseExpression();
-            }
-            expect(';');
-
-            if (!match(')')) {
-                update = parseExpression();
-            }
-        }
-
-        expect(')');
-
-        oldInIteration = state.inIteration;
-        state.inIteration = true;
-
-        body = isolateCoverGrammar(parseStatement);
-
-        state.inIteration = oldInIteration;
-
-        return (typeof left === 'undefined') ?
-                node.finishForStatement(init, test, update, body) :
-                forIn ? node.finishForInStatement(left, right, body) :
-                    node.finishForOfStatement(left, right, body);
-    }
-
-    // ECMA-262 13.8 The continue statement
-
-    function parseContinueStatement(node) {
-        var label = null, key;
-
-        expectKeyword('continue');
-
-        // Optimize the most common form: 'continue;'.
-        if (source.charCodeAt(startIndex) === 0x3B) {
-            lex();
-
-            if (!state.inIteration) {
-                throwError(Messages.IllegalContinue);
-            }
-
-            return node.finishContinueStatement(null);
-        }
-
-        if (hasLineTerminator) {
-            if (!state.inIteration) {
-                throwError(Messages.IllegalContinue);
-            }
-
-            return node.finishContinueStatement(null);
-        }
-
-        if (lookahead.type === Token.Identifier) {
-            label = parseVariableIdentifier();
-
-            key = '$' + label.name;
-            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {
-                throwError(Messages.UnknownLabel, label.name);
-            }
-        }
-
-        consumeSemicolon();
-
-        if (label === null && !state.inIteration) {
-            throwError(Messages.IllegalContinue);
-        }
-
-        return node.finishContinueStatement(label);
-    }
-
-    // ECMA-262 13.9 The break statement
-
-    function parseBreakStatement(node) {
-        var label = null, key;
-
-        expectKeyword('break');
-
-        // Catch the very common case first: immediately a semicolon (U+003B).
-        if (source.charCodeAt(lastIndex) === 0x3B) {
-            lex();
-
-            if (!(state.inIteration || state.inSwitch)) {
-                throwError(Messages.IllegalBreak);
-            }
-
-            return node.finishBreakStatement(null);
-        }
-
-        if (hasLineTerminator) {
-            if (!(state.inIteration || state.inSwitch)) {
-                throwError(Messages.IllegalBreak);
-            }
-        } else if (lookahead.type === Token.Identifier) {
-            label = parseVariableIdentifier();
-
-            key = '$' + label.name;
-            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {
-                throwError(Messages.UnknownLabel, label.name);
-            }
-        }
-
-        consumeSemicolon();
-
-        if (label === null && !(state.inIteration || state.inSwitch)) {
-            throwError(Messages.IllegalBreak);
-        }
-
-        return node.finishBreakStatement(label);
-    }
-
-    // ECMA-262 13.10 The return statement
-
-    function parseReturnStatement(node) {
-        var argument = null;
-
-        expectKeyword('return');
-
-        if (!state.inFunctionBody) {
-            tolerateError(Messages.IllegalReturn);
-        }
-
-        // 'return' followed by a space and an identifier is very common.
-        if (source.charCodeAt(lastIndex) === 0x20) {
-            if (isIdentifierStart(source.charCodeAt(lastIndex + 1))) {
-                argument = parseExpression();
-                consumeSemicolon();
-                return node.finishReturnStatement(argument);
-            }
-        }
-
-        if (hasLineTerminator) {
-            // HACK
-            return node.finishReturnStatement(null);
-        }
-
-        if (!match(';')) {
-            if (!match('}') && lookahead.type !== Token.EOF) {
-                argument = parseExpression();
-            }
-        }
-
-        consumeSemicolon();
-
-        return node.finishReturnStatement(argument);
-    }
-
-    // ECMA-262 13.11 The with statement
-
-    function parseWithStatement(node) {
-        var object, body;
-
-        if (strict) {
-            tolerateError(Messages.StrictModeWith);
-        }
-
-        expectKeyword('with');
-
-        expect('(');
-
-        object = parseExpression();
-
-        expect(')');
-
-        body = parseStatement();
-
-        return node.finishWithStatement(object, body);
-    }
-
-    // ECMA-262 13.12 The switch statement
-
-    function parseSwitchCase() {
-        var test, consequent = [], statement, node = new Node();
-
-        if (matchKeyword('default')) {
-            lex();
-            test = null;
-        } else {
-            expectKeyword('case');
-            test = parseExpression();
-        }
-        expect(':');
-
-        while (startIndex < length) {
-            if (match('}') || matchKeyword('default') || matchKeyword('case')) {
-                break;
-            }
-            statement = parseStatementListItem();
-            consequent.push(statement);
-        }
-
-        return node.finishSwitchCase(test, consequent);
-    }
-
-    function parseSwitchStatement(node) {
-        var discriminant, cases, clause, oldInSwitch, defaultFound;
-
-        expectKeyword('switch');
-
-        expect('(');
-
-        discriminant = parseExpression();
-
-        expect(')');
-
-        expect('{');
-
-        cases = [];
-
-        if (match('}')) {
-            lex();
-            return node.finishSwitchStatement(discriminant, cases);
-        }
-
-        oldInSwitch = state.inSwitch;
-        state.inSwitch = true;
-        defaultFound = false;
-
-        while (startIndex < length) {
-            if (match('}')) {
-                break;
-            }
-            clause = parseSwitchCase();
-            if (clause.test === null) {
-                if (defaultFound) {
-                    throwError(Messages.MultipleDefaultsInSwitch);
-                }
-                defaultFound = true;
-            }
-            cases.push(clause);
-        }
-
-        state.inSwitch = oldInSwitch;
-
-        expect('}');
-
-        return node.finishSwitchStatement(discriminant, cases);
-    }
-
-    // ECMA-262 13.14 The throw statement
-
-    function parseThrowStatement(node) {
-        var argument;
-
-        expectKeyword('throw');
-
-        if (hasLineTerminator) {
-            throwError(Messages.NewlineAfterThrow);
-        }
-
-        argument = parseExpression();
-
-        consumeSemicolon();
-
-        return node.finishThrowStatement(argument);
-    }
-
-    // ECMA-262 13.15 The try statement
-
-    function parseCatchClause() {
-        var param, params = [], paramMap = {}, key, i, body, node = new Node();
-
-        expectKeyword('catch');
-
-        expect('(');
-        if (match(')')) {
-            throwUnexpectedToken(lookahead);
-        }
-
-        param = parsePattern(params);
-        for (i = 0; i < params.length; i++) {
-            key = '$' + params[i].value;
-            if (Object.prototype.hasOwnProperty.call(paramMap, key)) {
-                tolerateError(Messages.DuplicateBinding, params[i].value);
-            }
-            paramMap[key] = true;
-        }
-
-        // ECMA-262 12.14.1
-        if (strict && isRestrictedWord(param.name)) {
-            tolerateError(Messages.StrictCatchVariable);
-        }
-
-        expect(')');
-        body = parseBlock();
-        return node.finishCatchClause(param, body);
-    }
-
-    function parseTryStatement(node) {
-        var block, handler = null, finalizer = null;
-
-        expectKeyword('try');
-
-        block = parseBlock();
-
-        if (matchKeyword('catch')) {
-            handler = parseCatchClause();
-        }
-
-        if (matchKeyword('finally')) {
-            lex();
-            finalizer = parseBlock();
-        }
-
-        if (!handler && !finalizer) {
-            throwError(Messages.NoCatchOrFinally);
-        }
-
-        return node.finishTryStatement(block, handler, finalizer);
-    }
-
-    // ECMA-262 13.16 The debugger statement
-
-    function parseDebuggerStatement(node) {
-        expectKeyword('debugger');
-
-        consumeSemicolon();
-
-        return node.finishDebuggerStatement();
-    }
-
-    // 13 Statements
-
-    function parseStatement() {
-        var type = lookahead.type,
-            expr,
-            labeledBody,
-            key,
-            node;
-
-        if (type === Token.EOF) {
-            throwUnexpectedToken(lookahead);
-        }
-
-        if (type === Token.Punctuator && lookahead.value === '{') {
-            return parseBlock();
-        }
-        isAssignmentTarget = isBindingElement = true;
-        node = new Node();
-
-        if (type === Token.Punctuator) {
-            switch (lookahead.value) {
-            case ';':
-                return parseEmptyStatement(node);
-            case '(':
-                return parseExpressionStatement(node);
-            default:
-                break;
-            }
-        } else if (type === Token.Keyword) {
-            switch (lookahead.value) {
-            case 'break':
-                return parseBreakStatement(node);
-            case 'continue':
-                return parseContinueStatement(node);
-            case 'debugger':
-                return parseDebuggerStatement(node);
-            case 'do':
-                return parseDoWhileStatement(node);
-            case 'for':
-                return parseForStatement(node);
-            case 'function':
-                return parseFunctionDeclaration(node);
-            case 'if':
-                return parseIfStatement(node);
-            case 'return':
-                return parseReturnStatement(node);
-            case 'switch':
-                return parseSwitchStatement(node);
-            case 'throw':
-                return parseThrowStatement(node);
-            case 'try':
-                return parseTryStatement(node);
-            case 'var':
-                return parseVariableStatement(node);
-            case 'while':
-                return parseWhileStatement(node);
-            case 'with':
-                return parseWithStatement(node);
-            default:
-                break;
-            }
-        }
-
-        expr = parseExpression();
-
-        // ECMA-262 12.12 Labelled Statements
-        if ((expr.type === Syntax.Identifier) && match(':')) {
-            lex();
-
-            key = '$' + expr.name;
-            if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) {
-                throwError(Messages.Redeclaration, 'Label', expr.name);
-            }
-
-            state.labelSet[key] = true;
-            labeledBody = parseStatement();
-            delete state.labelSet[key];
-            return node.finishLabeledStatement(expr, labeledBody);
-        }
-
-        consumeSemicolon();
-
-        return node.finishExpressionStatement(expr);
-    }
-
-    // ECMA-262 14.1 Function Definition
-
-    function parseFunctionSourceElements() {
-        var statement, body = [], token, directive, firstRestricted,
-            oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody, oldParenthesisCount,
-            node = new Node();
-
-        expect('{');
-
-        while (startIndex < length) {
-            if (lookahead.type !== Token.StringLiteral) {
-                break;
-            }
-            token = lookahead;
-
-            statement = parseStatementListItem();
-            body.push(statement);
-            if (statement.expression.type !== Syntax.Literal) {
-                // this is not directive
-                break;
-            }
-            directive = source.slice(token.start + 1, token.end - 1);
-            if (directive === 'use strict') {
-                strict = true;
-                if (firstRestricted) {
-                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);
-                }
-            } else {
-                if (!firstRestricted && token.octal) {
-                    firstRestricted = token;
-                }
-            }
-        }
-
-        oldLabelSet = state.labelSet;
-        oldInIteration = state.inIteration;
-        oldInSwitch = state.inSwitch;
-        oldInFunctionBody = state.inFunctionBody;
-        oldParenthesisCount = state.parenthesizedCount;
-
-        state.labelSet = {};
-        state.inIteration = false;
-        state.inSwitch = false;
-        state.inFunctionBody = true;
-        state.parenthesizedCount = 0;
-
-        while (startIndex < length) {
-            if (match('}')) {
-                break;
-            }
-            body.push(parseStatementListItem());
-        }
-
-        expect('}');
-
-        state.labelSet = oldLabelSet;
-        state.inIteration = oldInIteration;
-        state.inSwitch = oldInSwitch;
-        state.inFunctionBody = oldInFunctionBody;
-        state.parenthesizedCount = oldParenthesisCount;
-
-        return node.finishBlockStatement(body);
-    }
-
-    function validateParam(options, param, name) {
-        var key = '$' + name;
-        if (strict) {
-            if (isRestrictedWord(name)) {
-                options.stricted = param;
-                options.message = Messages.StrictParamName;
-            }
-            if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {
-                options.stricted = param;
-                options.message = Messages.StrictParamDupe;
-            }
-        } else if (!options.firstRestricted) {
-            if (isRestrictedWord(name)) {
-                options.firstRestricted = param;
-                options.message = Messages.StrictParamName;
-            } else if (isStrictModeReservedWord(name)) {
-                options.firstRestricted = param;
-                options.message = Messages.StrictReservedWord;
-            } else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {
-                options.stricted = param;
-                options.message = Messages.StrictParamDupe;
-            }
-        }
-        options.paramSet[key] = true;
-    }
-
-    function parseParam(options) {
-        var token, param, params = [], i, def;
-
-        token = lookahead;
-        if (token.value === '...') {
-            param = parseRestElement(params);
-            validateParam(options, param.argument, param.argument.name);
-            options.params.push(param);
-            options.defaults.push(null);
-            return false;
-        }
-
-        param = parsePatternWithDefault(params);
-        for (i = 0; i < params.length; i++) {
-            validateParam(options, params[i], params[i].value);
-        }
-
-        if (param.type === Syntax.AssignmentPattern) {
-            def = param.right;
-            param = param.left;
-            ++options.defaultCount;
-        }
-
-        options.params.push(param);
-        options.defaults.push(def);
-
-        return !match(')');
-    }
-
-    function parseParams(firstRestricted) {
-        var options;
-
-        options = {
-            params: [],
-            defaultCount: 0,
-            defaults: [],
-            firstRestricted: firstRestricted
-        };
-
-        expect('(');
-
-        if (!match(')')) {
-            options.paramSet = {};
-            while (startIndex < length) {
-                if (!parseParam(options)) {
-                    break;
-                }
-                expect(',');
-            }
-        }
-
-        expect(')');
-
-        if (options.defaultCount === 0) {
-            options.defaults = [];
-        }
-
-        return {
-            params: options.params,
-            defaults: options.defaults,
-            stricted: options.stricted,
-            firstRestricted: options.firstRestricted,
-            message: options.message
-        };
-    }
-
-    function parseFunctionDeclaration(node, identifierIsOptional) {
-        var id = null, params = [], defaults = [], body, token, stricted, tmp, firstRestricted, message, previousStrict,
-            isGenerator, previousAllowYield;
-
-        previousAllowYield = state.allowYield;
-
-        expectKeyword('function');
-
-        isGenerator = match('*');
-        if (isGenerator) {
-            lex();
-        }
-
-        if (!identifierIsOptional || !match('(')) {
-            token = lookahead;
-            id = parseVariableIdentifier();
-            if (strict) {
-                if (isRestrictedWord(token.value)) {
-                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);
-                }
-            } else {
-                if (isRestrictedWord(token.value)) {
-                    firstRestricted = token;
-                    message = Messages.StrictFunctionName;
-                } else if (isStrictModeReservedWord(token.value)) {
-                    firstRestricted = token;
-                    message = Messages.StrictReservedWord;
-                }
-            }
-        }
-
-        state.allowYield = !isGenerator;
-        tmp = parseParams(firstRestricted);
-        params = tmp.params;
-        defaults = tmp.defaults;
-        stricted = tmp.stricted;
-        firstRestricted = tmp.firstRestricted;
-        if (tmp.message) {
-            message = tmp.message;
-        }
-
-
-        previousStrict = strict;
-        body = parseFunctionSourceElements();
-        if (strict && firstRestricted) {
-            throwUnexpectedToken(firstRestricted, message);
-        }
-        if (strict && stricted) {
-            tolerateUnexpectedToken(stricted, message);
-        }
-
-        strict = previousStrict;
-        state.allowYield = previousAllowYield;
-
-        return node.finishFunctionDeclaration(id, params, defaults, body, isGenerator);
-    }
-
-    function parseFunctionExpression() {
-        var token, id = null, stricted, firstRestricted, message, tmp,
-            params = [], defaults = [], body, previousStrict, node = new Node(),
-            isGenerator, previousAllowYield;
-
-        previousAllowYield = state.allowYield;
-
-        expectKeyword('function');
-
-        isGenerator = match('*');
-        if (isGenerator) {
-            lex();
-        }
-
-        state.allowYield = !isGenerator;
-        if (!match('(')) {
-            token = lookahead;
-            id = (!strict && !isGenerator && matchKeyword('yield')) ? parseNonComputedProperty() : parseVariableIdentifier();
-            if (strict) {
-                if (isRestrictedWord(token.value)) {
-                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);
-                }
-            } else {
-                if (isRestrictedWord(token.value)) {
-                    firstRestricted = token;
-                    message = Messages.StrictFunctionName;
-                } else if (isStrictModeReservedWord(token.value)) {
-                    firstRestricted = token;
-                    message = Messages.StrictReservedWord;
-                }
-            }
-        }
-
-        tmp = parseParams(firstRestricted);
-        params = tmp.params;
-        defaults = tmp.defaults;
-        stricted = tmp.stricted;
-        firstRestricted = tmp.firstRestricted;
-        if (tmp.message) {
-            message = tmp.message;
-        }
-
-        previousStrict = strict;
-        body = parseFunctionSourceElements();
-        if (strict && firstRestricted) {
-            throwUnexpectedToken(firstRestricted, message);
-        }
-        if (strict && stricted) {
-            tolerateUnexpectedToken(stricted, message);
-        }
-        strict = previousStrict;
-        state.allowYield = previousAllowYield;
-
-        return node.finishFunctionExpression(id, params, defaults, body, isGenerator);
-    }
-
-    // ECMA-262 14.5 Class Definitions
-
-    function parseClassBody() {
-        var classBody, token, isStatic, hasConstructor = false, body, method, computed, key;
-
-        classBody = new Node();
-
-        expect('{');
-        body = [];
-        while (!match('}')) {
-            if (match(';')) {
-                lex();
-            } else {
-                method = new Node();
-                token = lookahead;
-                isStatic = false;
-                computed = match('[');
-                if (match('*')) {
-                    lex();
-                } else {
-                    key = parseObjectPropertyKey();
-                    if (key.name === 'static' && (lookaheadPropertyName() || match('*'))) {
-                        token = lookahead;
-                        isStatic = true;
-                        computed = match('[');
-                        if (match('*')) {
-                            lex();
-                        } else {
-                            key = parseObjectPropertyKey();
-                        }
-                    }
-                }
-                method = tryParseMethodDefinition(token, key, computed, method);
-                if (method) {
-                    method['static'] = isStatic; // jscs:ignore requireDotNotation
-                    if (method.kind === 'init') {
-                        method.kind = 'method';
-                    }
-                    if (!isStatic) {
-                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'constructor') {
-                            if (method.kind !== 'method' || !method.method || method.value.generator) {
-                                throwUnexpectedToken(token, Messages.ConstructorSpecialMethod);
-                            }
-                            if (hasConstructor) {
-                                throwUnexpectedToken(token, Messages.DuplicateConstructor);
-                            } else {
-                                hasConstructor = true;
-                            }
-                            method.kind = 'constructor';
-                        }
-                    } else {
-                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'prototype') {
-                            throwUnexpectedToken(token, Messages.StaticPrototype);
-                        }
-                    }
-                    method.type = Syntax.MethodDefinition;
-                    delete method.method;
-                    delete method.shorthand;
-                    body.push(method);
-                } else {
-                    throwUnexpectedToken(lookahead);
-                }
-            }
-        }
-        lex();
-        return classBody.finishClassBody(body);
-    }
-
-    function parseClassDeclaration(identifierIsOptional) {
-        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;
-        strict = true;
-
-        expectKeyword('class');
-
-        if (!identifierIsOptional || lookahead.type === Token.Identifier) {
-            id = parseVariableIdentifier();
-        }
-
-        if (matchKeyword('extends')) {
-            lex();
-            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);
-        }
-        classBody = parseClassBody();
-        strict = previousStrict;
-
-        return classNode.finishClassDeclaration(id, superClass, classBody);
-    }
-
-    function parseClassExpression() {
-        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;
-        strict = true;
-
-        expectKeyword('class');
-
-        if (lookahead.type === Token.Identifier) {
-            id = parseVariableIdentifier();
-        }
-
-        if (matchKeyword('extends')) {
-            lex();
-            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);
-        }
-        classBody = parseClassBody();
-        strict = previousStrict;
-
-        return classNode.finishClassExpression(id, superClass, classBody);
-    }
-
-    // ECMA-262 15.2 Modules
-
-    function parseModuleSpecifier() {
-        var node = new Node();
-
-        if (lookahead.type !== Token.StringLiteral) {
-            throwError(Messages.InvalidModuleSpecifier);
-        }
-        return node.finishLiteral(lex());
-    }
-
-    // ECMA-262 15.2.3 Exports
-
-    function parseExportSpecifier() {
-        var exported, local, node = new Node(), def;
-        if (matchKeyword('default')) {
-            // export {default} from 'something';
-            def = new Node();
-            lex();
-            local = def.finishIdentifier('default');
-        } else {
-            local = parseVariableIdentifier();
-        }
-        if (matchContextualKeyword('as')) {
-            lex();
-            exported = parseNonComputedProperty();
-        }
-        return node.finishExportSpecifier(local, exported);
-    }
-
-    function parseExportNamedDeclaration(node) {
-        var declaration = null,
-            isExportFromIdentifier,
-            src = null, specifiers = [];
-
-        // non-default export
-        if (lookahead.type === Token.Keyword) {
-            // covers:
-            // export var f = 1;
-            switch (lookahead.value) {
-                case 'let':
-                case 'const':
-                    declaration = parseLexicalDeclaration({inFor: false});
-                    return node.finishExportNamedDeclaration(declaration, specifiers, null);
-                case 'var':
-                case 'class':
-                case 'function':
-                    declaration = parseStatementListItem();
-                    return node.finishExportNamedDeclaration(declaration, specifiers, null);
-            }
-        }
-
-        expect('{');
-        while (!match('}')) {
-            isExportFromIdentifier = isExportFromIdentifier || matchKeyword('default');
-            specifiers.push(parseExportSpecifier());
-            if (!match('}')) {
-                expect(',');
-                if (match('}')) {
-                    break;
-                }
-            }
-        }
-        expect('}');
-
-        if (matchContextualKeyword('from')) {
-            // covering:
-            // export {default} from 'foo';
-            // export {foo} from 'foo';
-            lex();
-            src = parseModuleSpecifier();
-            consumeSemicolon();
-        } else if (isExportFromIdentifier) {
-            // covering:
-            // export {default}; // missing fromClause
-            throwError(lookahead.value ?
-                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);
-        } else {
-            // cover
-            // export {foo};
-            consumeSemicolon();
-        }
-        return node.finishExportNamedDeclaration(declaration, specifiers, src);
-    }
-
-    function parseExportDefaultDeclaration(node) {
-        var declaration = null,
-            expression = null;
-
-        // covers:
-        // export default ...
-        expectKeyword('default');
-
-        if (matchKeyword('function')) {
-            // covers:
-            // export default function foo () {}
-            // export default function () {}
-            declaration = parseFunctionDeclaration(new Node(), true);
-            return node.finishExportDefaultDeclaration(declaration);
-        }
-        if (matchKeyword('class')) {
-            declaration = parseClassDeclaration(true);
-            return node.finishExportDefaultDeclaration(declaration);
-        }
-
-        if (matchContextualKeyword('from')) {
-            throwError(Messages.UnexpectedToken, lookahead.value);
-        }
-
-        // covers:
-        // export default {};
-        // export default [];
-        // export default (1 + 2);
-        if (match('{')) {
-            expression = parseObjectInitializer();
-        } else if (match('[')) {
-            expression = parseArrayInitializer();
-        } else {
-            expression = parseAssignmentExpression();
-        }
-        consumeSemicolon();
-        return node.finishExportDefaultDeclaration(expression);
-    }
-
-    function parseExportAllDeclaration(node) {
-        var src;
-
-        // covers:
-        // export * from 'foo';
-        expect('*');
-        if (!matchContextualKeyword('from')) {
-            throwError(lookahead.value ?
-                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);
-        }
-        lex();
-        src = parseModuleSpecifier();
-        consumeSemicolon();
-
-        return node.finishExportAllDeclaration(src);
-    }
-
-    function parseExportDeclaration() {
-        var node = new Node();
-        if (state.inFunctionBody) {
-            throwError(Messages.IllegalExportDeclaration);
-        }
-
-        expectKeyword('export');
-
-        if (matchKeyword('default')) {
-            return parseExportDefaultDeclaration(node);
-        }
-        if (match('*')) {
-            return parseExportAllDeclaration(node);
-        }
-        return parseExportNamedDeclaration(node);
-    }
-
-    // ECMA-262 15.2.2 Imports
-
-    function parseImportSpecifier() {
-        // import {<foo as bar>} ...;
-        var local, imported, node = new Node();
-
-        imported = parseNonComputedProperty();
-        if (matchContextualKeyword('as')) {
-            lex();
-            local = parseVariableIdentifier();
-        }
-
-        return node.finishImportSpecifier(local, imported);
-    }
-
-    function parseNamedImports() {
-        var specifiers = [];
-        // {foo, bar as bas}
-        expect('{');
-        while (!match('}')) {
-            specifiers.push(parseImportSpecifier());
-            if (!match('}')) {
-                expect(',');
-                if (match('}')) {
-                    break;
-                }
-            }
-        }
-        expect('}');
-        return specifiers;
-    }
-
-    function parseImportDefaultSpecifier() {
-        // import <foo> ...;
-        var local, node = new Node();
-
-        local = parseNonComputedProperty();
-
-        return node.finishImportDefaultSpecifier(local);
-    }
-
-    function parseImportNamespaceSpecifier() {
-        // import <* as foo> ...;
-        var local, node = new Node();
-
-        expect('*');
-        if (!matchContextualKeyword('as')) {
-            throwError(Messages.NoAsAfterImportNamespace);
-        }
-        lex();
-        local = parseNonComputedProperty();
-
-        return node.finishImportNamespaceSpecifier(local);
-    }
-
-    function parseImportDeclaration() {
-        var specifiers = [], src, node = new Node();
-
-        if (state.inFunctionBody) {
-            throwError(Messages.IllegalImportDeclaration);
-        }
-
-        expectKeyword('import');
-
-        if (lookahead.type === Token.StringLiteral) {
-            // import 'foo';
-            src = parseModuleSpecifier();
-        } else {
-
-            if (match('{')) {
-                // import {bar}
-                specifiers = specifiers.concat(parseNamedImports());
-            } else if (match('*')) {
-                // import * as foo
-                specifiers.push(parseImportNamespaceSpecifier());
-            } else if (isIdentifierName(lookahead) && !matchKeyword('default')) {
-                // import foo
-                specifiers.push(parseImportDefaultSpecifier());
-                if (match(',')) {
-                    lex();
-                    if (match('*')) {
-                        // import foo, * as foo
-                        specifiers.push(parseImportNamespaceSpecifier());
-                    } else if (match('{')) {
-                        // import foo, {bar}
-                        specifiers = specifiers.concat(parseNamedImports());
-                    } else {
-                        throwUnexpectedToken(lookahead);
-                    }
-                }
-            } else {
-                throwUnexpectedToken(lex());
-            }
-
-            if (!matchContextualKeyword('from')) {
-                throwError(lookahead.value ?
-                        Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);
-            }
-            lex();
-            src = parseModuleSpecifier();
-        }
-
-        consumeSemicolon();
-        return node.finishImportDeclaration(specifiers, src);
-    }
-
-    // ECMA-262 15.1 Scripts
-
-    function parseScriptBody() {
-        var statement, body = [], token, directive, firstRestricted;
-
-        while (startIndex < length) {
-            token = lookahead;
-            if (token.type !== Token.StringLiteral) {
-                break;
-            }
-
-            statement = parseStatementListItem();
-            body.push(statement);
-            if (statement.expression.type !== Syntax.Literal) {
-                // this is not directive
-                break;
-            }
-            directive = source.slice(token.start + 1, token.end - 1);
-            if (directive === 'use strict') {
-                strict = true;
-                if (firstRestricted) {
-                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);
-                }
-            } else {
-                if (!firstRestricted && token.octal) {
-                    firstRestricted = token;
-                }
-            }
-        }
-
-        while (startIndex < length) {
-            statement = parseStatementListItem();
-            /* istanbul ignore if */
-            if (typeof statement === 'undefined') {
-                break;
-            }
-            body.push(statement);
-        }
-        return body;
-    }
-
-    function parseProgram() {
-        var body, node;
-
-        peek();
-        node = new Node();
-
-        body = parseScriptBody();
-        return node.finishProgram(body, state.sourceType);
-    }
-
-    function filterTokenLocation() {
-        var i, entry, token, tokens = [];
-
-        for (i = 0; i < extra.tokens.length; ++i) {
-            entry = extra.tokens[i];
-            token = {
-                type: entry.type,
-                value: entry.value
-            };
-            if (entry.regex) {
-                token.regex = {
-                    pattern: entry.regex.pattern,
-                    flags: entry.regex.flags
-                };
-            }
-            if (extra.range) {
-                token.range = entry.range;
-            }
-            if (extra.loc) {
-                token.loc = entry.loc;
-            }
-            tokens.push(token);
-        }
-
-        extra.tokens = tokens;
-    }
-
-    function tokenize(code, options, delegate) {
-        var toString,
-            tokens;
-
-        toString = String;
-        if (typeof code !== 'string' && !(code instanceof String)) {
-            code = toString(code);
-        }
-
-        source = code;
-        index = 0;
-        lineNumber = (source.length > 0) ? 1 : 0;
-        lineStart = 0;
-        startIndex = index;
-        startLineNumber = lineNumber;
-        startLineStart = lineStart;
-        length = source.length;
-        lookahead = null;
-        state = {
-            allowIn: true,
-            allowYield: true,
-            labelSet: {},
-            inFunctionBody: false,
-            inIteration: false,
-            inSwitch: false,
-            lastCommentStart: -1,
-            curlyStack: []
-        };
-
-        extra = {};
-
-        // Options matching.
-        options = options || {};
-
-        // Of course we collect tokens here.
-        options.tokens = true;
-        extra.tokens = [];
-        extra.tokenValues = [];
-        extra.tokenize = true;
-        extra.delegate = delegate;
-
-        // The following two fields are necessary to compute the Regex tokens.
-        extra.openParenToken = -1;
-        extra.openCurlyToken = -1;
-
-        extra.range = (typeof options.range === 'boolean') && options.range;
-        extra.loc = (typeof options.loc === 'boolean') && options.loc;
-
-        if (typeof options.comment === 'boolean' && options.comment) {
-            extra.comments = [];
-        }
-        if (typeof options.tolerant === 'boolean' && options.tolerant) {
-            extra.errors = [];
-        }
-
-        try {
-            peek();
-            if (lookahead.type === Token.EOF) {
-                return extra.tokens;
-            }
-
-            lex();
-            while (lookahead.type !== Token.EOF) {
-                try {
-                    lex();
-                } catch (lexError) {
-                    if (extra.errors) {
-                        recordError(lexError);
-                        // We have to break on the first error
-                        // to avoid infinite loops.
-                        break;
-                    } else {
-                        throw lexError;
-                    }
-                }
-            }
-
-            tokens = extra.tokens;
-            if (typeof extra.errors !== 'undefined') {
-                tokens.errors = extra.errors;
-            }
-        } catch (e) {
-            throw e;
-        } finally {
-            extra = {};
-        }
-        return tokens;
-    }
-
-    function parse(code, options) {
-        var program, toString;
-
-        toString = String;
-        if (typeof code !== 'string' && !(code instanceof String)) {
-            code = toString(code);
-        }
-
-        source = code;
-        index = 0;
-        lineNumber = (source.length > 0) ? 1 : 0;
-        lineStart = 0;
-        startIndex = index;
-        startLineNumber = lineNumber;
-        startLineStart = lineStart;
-        length = source.length;
-        lookahead = null;
-        state = {
-            allowIn: true,
-            allowYield: true,
-            labelSet: {},
-            inFunctionBody: false,
-            inIteration: false,
-            inSwitch: false,
-            lastCommentStart: -1,
-            curlyStack: [],
-            sourceType: 'script'
-        };
-        strict = false;
-
-        extra = {};
-        if (typeof options !== 'undefined') {
-            extra.range = (typeof options.range === 'boolean') && options.range;
-            extra.loc = (typeof options.loc === 'boolean') && options.loc;
-            extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment;
-
-            if (extra.loc && options.source !== null && options.source !== undefined) {
-                extra.source = toString(options.source);
-            }
-
-            if (typeof options.tokens === 'boolean' && options.tokens) {
-                extra.tokens = [];
-            }
-            if (typeof options.comment === 'boolean' && options.comment) {
-                extra.comments = [];
-            }
-            if (typeof options.tolerant === 'boolean' && options.tolerant) {
-                extra.errors = [];
-            }
-            if (extra.attachComment) {
-                extra.range = true;
-                extra.comments = [];
-                extra.bottomRightStack = [];
-                extra.trailingComments = [];
-                extra.leadingComments = [];
-            }
-            if (options.sourceType === 'module') {
-                // very restrictive condition for now
-                state.sourceType = options.sourceType;
-                strict = true;
-            }
-        }
-
-        try {
-            program = parseProgram();
-            if (typeof extra.comments !== 'undefined') {
-                program.comments = extra.comments;
-            }
-            if (typeof extra.tokens !== 'undefined') {
-                filterTokenLocation();
-                program.tokens = extra.tokens;
-            }
-            if (typeof extra.errors !== 'undefined') {
-                program.errors = extra.errors;
-            }
-        } catch (e) {
-            throw e;
-        } finally {
-            extra = {};
-        }
-
-        return program;
-    }
-
-    // Sync with *.json manifests.
-    exports.version = '2.7.0';
-
-    exports.tokenize = tokenize;
-
-    exports.parse = parse;
-
-    // Deep copy.
-    /* istanbul ignore next */
-    exports.Syntax = (function () {
-        var name, types = {};
-
-        if (typeof Object.create === 'function') {
-            types = Object.create(null);
-        }
-
-        for (name in Syntax) {
-            if (Syntax.hasOwnProperty(name)) {
-                types[name] = Syntax[name];
-            }
-        }
-
-        if (typeof Object.freeze === 'function') {
-            Object.freeze(types);
-        }
-
-        return types;
-    }());
-
-}));
-/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/features/org.eclipse.wst.jsdt.feature/feature.xml b/features/org.eclipse.wst.jsdt.feature/feature.xml
index cc28e4899..093267ee5 100644
--- a/features/org.eclipse.wst.jsdt.feature/feature.xml
+++ b/features/org.eclipse.wst.jsdt.feature/feature.xml
@@ -32,13 +32,6 @@
          unpack="false"/>

 

    <plugin

-         id="org.eclipse.wst.jsdt.nashorn.extension"

-         download-size="0"

-         install-size="0"

-         version="0.0.0"

-         unpack="false"/>

-

-   <plugin

          id="org.eclipse.wst.jsdt.manipulation"

          download-size="0"

          install-size="0"

diff --git a/pom.xml b/pom.xml
index 12b748d6f..77d1eb3d7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -36,7 +36,6 @@
     <module>nodejs</module>
     <module>docs</module>
     <module>tests</module>
-    <module>nashorn</module>
     <module>features</module>
   </modules>