/*******************************************************************************
 * Copyright (c) 2000, 2012 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *     Stephan Herrmann - Contributions for
 *     							bug 319201 - [null] no warning when unboxing SingleNameReference causes NPE
 *     							bug 349326 - [1.7] new warning for missing try-with-resources
 *								bug 186342 - [compiler][null] Using annotations for null checking
 *								bug 368546 - [compiler][resource] Avoid remaining false positives found when compiling the Eclipse SDK
 *								bug 370639 - [compiler][resource] restore the default for resource leak warnings
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;

import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.codegen.CodeStream;
import org.eclipse.jdt.internal.compiler.codegen.Opcodes;
import org.eclipse.jdt.internal.compiler.flow.FlowContext;
import org.eclipse.jdt.internal.compiler.flow.FlowInfo;
import org.eclipse.jdt.internal.compiler.impl.Constant;
import org.eclipse.jdt.internal.compiler.lookup.Binding;
import org.eclipse.jdt.internal.compiler.lookup.BlockScope;
import org.eclipse.jdt.internal.compiler.lookup.ExtraCompilerModifiers;
import org.eclipse.jdt.internal.compiler.lookup.LocalTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.MethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.ParameterizedTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.ProblemMethodBinding;
import org.eclipse.jdt.internal.compiler.lookup.ProblemReasons;
import org.eclipse.jdt.internal.compiler.lookup.ProblemReferenceBinding;
import org.eclipse.jdt.internal.compiler.lookup.RawTypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding;
import org.eclipse.jdt.internal.compiler.lookup.TagBits;
import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
import org.eclipse.jdt.internal.compiler.lookup.TypeConstants;
import org.eclipse.jdt.internal.compiler.lookup.TypeIds;

/**
 * Variation on allocation, where can optionally be specified any of:
 * - leading enclosing instance
 * - trailing anonymous type
 * - generic type arguments for generic constructor invocation
 */
public class QualifiedAllocationExpression extends AllocationExpression {

	//qualification may be on both side
	public Expression enclosingInstance;
	public TypeDeclaration anonymousType;

	public QualifiedAllocationExpression() {
		// for subtypes
	}

	public QualifiedAllocationExpression(TypeDeclaration anonymousType) {
		this.anonymousType = anonymousType;
		anonymousType.allocation = this;
	}

	public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
		// analyse the enclosing instance
		if (this.enclosingInstance != null) {
			flowInfo = this.enclosingInstance.analyseCode(currentScope, flowContext, flowInfo);
		} else {
			if (this.binding.declaringClass.superclass().isMemberType() && !this.binding.declaringClass.superclass().isStatic()) {
				// creating an anonymous type of a non-static member type without an enclosing instance of parent type
				currentScope.resetEnclosingMethodStaticFlag();
			}
		}

		// check captured variables are initialized in current context (26134)
		checkCapturedLocalInitializationIfNecessary(
			(ReferenceBinding)(this.anonymousType == null
				? this.binding.declaringClass.erasure()
				: this.binding.declaringClass.superclass().erasure()),
			currentScope,
			flowInfo);

		// process arguments
		if (this.arguments != null) {
			boolean analyseResources = currentScope.compilerOptions().analyseResourceLeaks;
			for (int i = 0, count = this.arguments.length; i < count; i++) {
				if (analyseResources) {
					// if argument is an AutoCloseable insert info that it *may* be closed (by the target method, i.e.)
					flowInfo = FakedTrackingVariable.markPassedToOutside(currentScope, this.arguments[i], flowInfo, false);
				}
				flowInfo = this.arguments[i].analyseCode(currentScope, flowContext, flowInfo);
				if ((this.arguments[i].implicitConversion & TypeIds.UNBOXING) != 0) {
					this.arguments[i].checkNPE(currentScope, flowContext, flowInfo);
				}
			}
			analyseArguments(currentScope, flowContext, flowInfo, this.binding, this.arguments);
		}

		// analyse the anonymous nested type
		if (this.anonymousType != null) {
			flowInfo = this.anonymousType.analyseCode(currentScope, flowContext, flowInfo);
		}

		// record some dependency information for exception types
		ReferenceBinding[] thrownExceptions;
		if (((thrownExceptions = this.binding.thrownExceptions).length) != 0) {
			if ((this.bits & ASTNode.Unchecked) != 0 && this.genericTypeArguments == null) {
				// https://bugs.eclipse.org/bugs/show_bug.cgi?id=277643, align with javac on JLS 15.12.2.6
				thrownExceptions = currentScope.environment().convertToRawTypes(this.binding.thrownExceptions, true, true);
			}			
			// check exception handling
			flowContext.checkExceptionHandlers(
				thrownExceptions,
				this,
				flowInfo.unconditionalCopy(),
				currentScope);
		}

		// after having analysed exceptions above start tracking newly allocated resource:
		if (currentScope.compilerOptions().analyseResourceLeaks && FakedTrackingVariable.isAnyCloseable(this.resolvedType)) {
			FakedTrackingVariable.analyseCloseableAllocation(currentScope, flowInfo, this);
		}

		manageEnclosingInstanceAccessIfNecessary(currentScope, flowInfo);
		manageSyntheticAccessIfNecessary(currentScope, flowInfo);
		return flowInfo;
	}

	public Expression enclosingInstance() {

		return this.enclosingInstance;
	}

	public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
		if (!valueRequired)
			currentScope.problemReporter().unusedObjectAllocation(this);
		int pc = codeStream.position;
		MethodBinding codegenBinding = this.binding.original();
		ReferenceBinding allocatedType = codegenBinding.declaringClass;
		codeStream.new_(allocatedType);
		boolean isUnboxing = (this.implicitConversion & TypeIds.UNBOXING) != 0;
		if (valueRequired || isUnboxing) {
			codeStream.dup();
		}
		// better highlight for allocation: display the type individually
		if (this.type != null) { // null for enum constant body
			codeStream.recordPositionsFrom(pc, this.type.sourceStart);
		} else {
			// push enum constant name and ordinal
			codeStream.ldc(String.valueOf(this.enumConstant.name));
			codeStream.generateInlinedValue(this.enumConstant.binding.id);
		}
		// handling innerclass instance allocation - enclosing instance arguments
		if (allocatedType.isNestedType()) {
			codeStream.generateSyntheticEnclosingInstanceValues(
				currentScope,
				allocatedType,
				enclosingInstance(),
				this);
		}
		// generate the arguments for constructor
		generateArguments(this.binding, this.arguments, currentScope, codeStream);
		// handling innerclass instance allocation - outer local arguments
		if (allocatedType.isNestedType()) {
			codeStream.generateSyntheticOuterArgumentValues(
				currentScope,
				allocatedType,
				this);
		}

		// invoke constructor
		if (this.syntheticAccessor == null) {
			codeStream.invoke(Opcodes.OPC_invokespecial, codegenBinding, null /* default declaringClass */);
		} else {
			// synthetic accessor got some extra arguments appended to its signature, which need values
			for (int i = 0,
				max = this.syntheticAccessor.parameters.length - codegenBinding.parameters.length;
				i < max;
				i++) {
				codeStream.aconst_null();
			}
			codeStream.invoke(Opcodes.OPC_invokespecial, this.syntheticAccessor, null /* default declaringClass */);
		}
		if (valueRequired) {
			codeStream.generateImplicitConversion(this.implicitConversion);
		} else if (isUnboxing) {
			// conversion only generated if unboxing
			codeStream.generateImplicitConversion(this.implicitConversion);
			switch (postConversionType(currentScope).id) {
				case T_long :
				case T_double :
					codeStream.pop2();
					break;
				default :
					codeStream.pop();
			}
		}
		codeStream.recordPositionsFrom(pc, this.sourceStart);

		if (this.anonymousType != null) {
			this.anonymousType.generateCode(currentScope, codeStream);
		}
	}

	public boolean isSuperAccess() {

		// necessary to lookup super constructor of anonymous type
		return this.anonymousType != null;
	}

	/* Inner emulation consists in either recording a dependency
	 * link only, or performing one level of propagation.
	 *
	 * Dependency mechanism is used whenever dealing with source target
	 * types, since by the time we reach them, we might not yet know their
	 * exact need.
	 */
	public void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo) {
		if ((flowInfo.tagBits & FlowInfo.UNREACHABLE_OR_DEAD) == 0)	{
		ReferenceBinding allocatedTypeErasure = (ReferenceBinding) this.binding.declaringClass.erasure();

		// perform some extra emulation work in case there is some and we are inside a local type only
		if (allocatedTypeErasure.isNestedType()
			&& currentScope.enclosingSourceType().isLocalType()) {

			if (allocatedTypeErasure.isLocalType()) {
				((LocalTypeBinding) allocatedTypeErasure).addInnerEmulationDependent(currentScope, this.enclosingInstance != null);
			} else {
				// locally propagate, since we already now the desired shape for sure
				currentScope.propagateInnerEmulation(allocatedTypeErasure, this.enclosingInstance != null);
			}
		}
		}
	}

	public StringBuffer printExpression(int indent, StringBuffer output) {
		if (this.enclosingInstance != null)
			this.enclosingInstance.printExpression(0, output).append('.');
		super.printExpression(0, output);
		if (this.anonymousType != null) {
			this.anonymousType.print(indent, output);
		}
		return output;
	}

	public TypeBinding resolveType(BlockScope scope) {
		// added for code assist...cannot occur with 'normal' code
		if (this.anonymousType == null && this.enclosingInstance == null) {
			return super.resolveType(scope);
		}

		// Propagate the type checking to the arguments, and checks if the constructor is defined.
		// ClassInstanceCreationExpression ::= Primary '.' 'new' SimpleName '(' ArgumentListopt ')' ClassBodyopt
		// ClassInstanceCreationExpression ::= Name '.' 'new' SimpleName '(' ArgumentListopt ')' ClassBodyopt

		this.constant = Constant.NotAConstant;
		TypeBinding enclosingInstanceType = null;
		ReferenceBinding enclosingInstanceReference = null;
		TypeBinding receiverType = null;
		boolean hasError = false;
		boolean enclosingInstanceContainsCast = false;
		boolean argsContainCast = false;

		if (this.enclosingInstance != null) {
			if (this.enclosingInstance instanceof CastExpression) {
				this.enclosingInstance.bits |= ASTNode.DisableUnnecessaryCastCheck; // will check later on
				enclosingInstanceContainsCast = true;
			}
			if ((enclosingInstanceType = this.enclosingInstance.resolveType(scope)) == null){
				hasError = true;
			} else if (enclosingInstanceType.isBaseType() || enclosingInstanceType.isArrayType()) {
				scope.problemReporter().illegalPrimitiveOrArrayTypeForEnclosingInstance(
					enclosingInstanceType,
					this.enclosingInstance);
				hasError = true;
			} else if (this.type instanceof QualifiedTypeReference) {
				scope.problemReporter().illegalUsageOfQualifiedTypeReference((QualifiedTypeReference)this.type);
				hasError = true;
			} else if (!(enclosingInstanceReference = (ReferenceBinding) enclosingInstanceType).canBeSeenBy(scope)) {
				// https://bugs.eclipse.org/bugs/show_bug.cgi?id=317212
				enclosingInstanceType = new ProblemReferenceBinding(
							enclosingInstanceReference.compoundName,
							enclosingInstanceReference,
							ProblemReasons.NotVisible);
				scope.problemReporter().invalidType(this.enclosingInstance, enclosingInstanceType);
				hasError = true;
			} else {
				receiverType = ((SingleTypeReference) this.type).resolveTypeEnclosing(scope, (ReferenceBinding) enclosingInstanceType);
				if (receiverType != null && enclosingInstanceContainsCast) {
					CastExpression.checkNeedForEnclosingInstanceCast(scope, this.enclosingInstance, enclosingInstanceType, receiverType);
				}
			}
		} else {
			if (this.type == null) {
				// initialization of an enum constant
				receiverType = scope.enclosingSourceType();
			} else {
				receiverType = this.type.resolveType(scope, true /* check bounds*/);
				checkParameterizedAllocation: {
					if (receiverType == null || !receiverType.isValidBinding()) break checkParameterizedAllocation;
					if (this.type instanceof ParameterizedQualifiedTypeReference) { // disallow new X<String>.Y<Integer>()
						ReferenceBinding currentType = (ReferenceBinding)receiverType;
						do {
							// isStatic() is answering true for toplevel types
							if ((currentType.modifiers & ClassFileConstants.AccStatic) != 0) break checkParameterizedAllocation;
							if (currentType.isRawType()) break checkParameterizedAllocation;
						} while ((currentType = currentType.enclosingType())!= null);
						ParameterizedQualifiedTypeReference qRef = (ParameterizedQualifiedTypeReference) this.type;
						for (int i = qRef.typeArguments.length - 2; i >= 0; i--) {
							if (qRef.typeArguments[i] != null) {
								scope.problemReporter().illegalQualifiedParameterizedTypeAllocation(this.type, receiverType);
								break;
							}
						}
					}
				}
			}
		}
		if (receiverType == null || !receiverType.isValidBinding()) {
			hasError = true;
		}

		// resolve type arguments (for generic constructor call)
		final boolean isDiamond = this.type != null && (this.type.bits & ASTNode.IsDiamond) != 0;
		if (this.typeArguments != null) {
			int length = this.typeArguments.length;
			boolean argHasError = scope.compilerOptions().sourceLevel < ClassFileConstants.JDK1_5;
			this.genericTypeArguments = new TypeBinding[length];
			for (int i = 0; i < length; i++) {
				TypeReference typeReference = this.typeArguments[i];
				if ((this.genericTypeArguments[i] = typeReference.resolveType(scope, true /* check bounds*/)) == null) {
					argHasError = true;
				}
				if (argHasError && typeReference instanceof Wildcard) {
					scope.problemReporter().illegalUsageOfWildcard(typeReference);
				}
			}
			if (isDiamond) {
				scope.problemReporter().diamondNotWithExplicitTypeArguments(this.typeArguments);
				return null;
			}
			if (argHasError) {
				if (this.arguments != null) { // still attempt to resolve arguments
					for (int i = 0, max = this.arguments.length; i < max; i++) {
						this.arguments[i].resolveType(scope);
					}
				}
				return null;
			}
		}

		// will check for null after args are resolved
		TypeBinding[] argumentTypes = Binding.NO_PARAMETERS;
		if (this.arguments != null) {
			int length = this.arguments.length;
			argumentTypes = new TypeBinding[length];
			for (int i = 0; i < length; i++) {
				Expression argument = this.arguments[i];
				if (argument instanceof CastExpression) {
					argument.bits |= ASTNode.DisableUnnecessaryCastCheck; // will check later on
					argsContainCast = true;
				}
				if ((argumentTypes[i] = argument.resolveType(scope)) == null){
					hasError = true;
				}
			}
		}

		// limit of fault-tolerance
		if (hasError) {
			/* https://bugs.eclipse.org/bugs/show_bug.cgi?id=345359, if arguments have errors, completely bail out in the <> case.
			   No meaningful type resolution is possible since inference of the elided types is fully tied to argument types. Do
			   not return the partially resolved type.
			 */
			if (isDiamond) {
				return null; // not the partially cooked this.resolvedType
			}
			if (receiverType instanceof ReferenceBinding) {
				ReferenceBinding referenceReceiver = (ReferenceBinding) receiverType;
				if (receiverType.isValidBinding()) {
					// record a best guess, for clients who need hint about possible contructor match
					int length = this.arguments  == null ? 0 : this.arguments.length;
					TypeBinding[] pseudoArgs = new TypeBinding[length];
					for (int i = length; --i >= 0;) {
						pseudoArgs[i] = argumentTypes[i] == null ? TypeBinding.NULL : argumentTypes[i]; // replace args with errors with null type
					}
					this.binding = scope.findMethod(referenceReceiver, TypeConstants.INIT, pseudoArgs, this);
					if (this.binding != null && !this.binding.isValidBinding()) {
						MethodBinding closestMatch = ((ProblemMethodBinding)this.binding).closestMatch;
						// record the closest match, for clients who may still need hint about possible method match
						if (closestMatch != null) {
							if (closestMatch.original().typeVariables != Binding.NO_TYPE_VARIABLES) { // generic method
								// shouldn't return generic method outside its context, rather convert it to raw method (175409)
								closestMatch = scope.environment().createParameterizedGenericMethod(closestMatch.original(), (RawTypeBinding)null);
							}
							this.binding = closestMatch;
							MethodBinding closestMatchOriginal = closestMatch.original();
							if (closestMatchOriginal.isOrEnclosedByPrivateType() && !scope.isDefinedInMethod(closestMatchOriginal)) {
								// ignore cases where method is used from within inside itself (e.g. direct recursions)
								closestMatchOriginal.modifiers |= ExtraCompilerModifiers.AccLocallyUsed;
							}
						}
					}
				}
				if (this.anonymousType != null) {
					// insert anonymous type in scope (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=210070)
					scope.addAnonymousType(this.anonymousType, referenceReceiver);
					this.anonymousType.resolve(scope);
					return this.resolvedType = this.anonymousType.binding;
				}
			}
			return this.resolvedType = receiverType;
		}
		if (this.anonymousType == null) {
			// qualified allocation with no anonymous type
			if (!receiverType.canBeInstantiated()) {
				scope.problemReporter().cannotInstantiate(this.type, receiverType);
				return this.resolvedType = receiverType;
			}
			if (isDiamond) {
				TypeBinding [] inferredTypes = inferElidedTypes(((ParameterizedTypeBinding) receiverType).genericType(), receiverType.enclosingType(), argumentTypes, scope);
				if (inferredTypes == null) {
					scope.problemReporter().cannotInferElidedTypes(this);
					return this.resolvedType = null;
				}
				receiverType = this.type.resolvedType = scope.environment().createParameterizedType(((ParameterizedTypeBinding) receiverType).genericType(), inferredTypes, ((ParameterizedTypeBinding) receiverType).enclosingType());
			}
			ReferenceBinding allocationType = (ReferenceBinding) receiverType;
			if ((this.binding = scope.getConstructor(allocationType, argumentTypes, this)).isValidBinding()) {
				if (isMethodUseDeprecated(this.binding, scope, true)) {
					scope.problemReporter().deprecatedMethod(this.binding, this);
				}
				if (checkInvocationArguments(scope, null, allocationType, this.binding, this.arguments, argumentTypes, argsContainCast, this)) {
					this.bits |= ASTNode.Unchecked;
				}
				if (this.typeArguments != null && this.binding.original().typeVariables == Binding.NO_TYPE_VARIABLES) {
					scope.problemReporter().unnecessaryTypeArgumentsForMethodInvocation(this.binding, this.genericTypeArguments, this.typeArguments);
				}
			} else {
				if (this.binding.declaringClass == null) {
					this.binding.declaringClass = allocationType;
				}
				if (this.type != null && !this.type.resolvedType.isValidBinding()) {
					// problem already got signaled on type reference, do not report secondary problem
					return null;
				}
				scope.problemReporter().invalidConstructor(this, this.binding);
				return this.resolvedType = receiverType;
			}
			if ((this.binding.tagBits & TagBits.HasMissingType) != 0) {
				scope.problemReporter().missingTypeInConstructor(this, this.binding);
			}
			if (!isDiamond && receiverType.isParameterizedTypeWithActualArguments()) {
		 		checkTypeArgumentRedundancy((ParameterizedTypeBinding)receiverType, receiverType.enclosingType(), argumentTypes , scope);
		 	}
			// The enclosing instance must be compatible with the innermost enclosing type
			ReferenceBinding expectedType = this.binding.declaringClass.enclosingType();
			if (expectedType != enclosingInstanceType) // must call before computeConversion() and typeMismatchError()
				scope.compilationUnitScope().recordTypeConversion(expectedType, enclosingInstanceType);
			if (enclosingInstanceType.isCompatibleWith(expectedType) || scope.isBoxingCompatibleWith(enclosingInstanceType, expectedType)) {
				this.enclosingInstance.computeConversion(scope, expectedType, enclosingInstanceType);
				return this.resolvedType = receiverType;
			}
			scope.problemReporter().typeMismatchError(enclosingInstanceType, expectedType, this.enclosingInstance, null);
			return this.resolvedType = receiverType;
		} else {
			if (isDiamond) {
				scope.problemReporter().diamondNotWithAnoymousClasses(this.type);
				return null;
			}	
		}
		ReferenceBinding superType = (ReferenceBinding) receiverType;
		if (superType.isTypeVariable()) {
			superType = new ProblemReferenceBinding(new char[][]{superType.sourceName()}, superType, ProblemReasons.IllegalSuperTypeVariable);
			scope.problemReporter().invalidType(this, superType);
			return null;
		} else if (this.type != null && superType.isEnum()) { // tolerate enum constant body
			scope.problemReporter().cannotInstantiate(this.type, superType);
			return this.resolvedType = superType;
		}
		// anonymous type scenario
		// an anonymous class inherits from java.lang.Object when declared "after" an interface
		ReferenceBinding anonymousSuperclass = superType.isInterface() ? scope.getJavaLangObject() : superType;
		// insert anonymous type in scope
		scope.addAnonymousType(this.anonymousType, superType);
		this.anonymousType.resolve(scope);

		// find anonymous super constructor
		this.resolvedType = this.anonymousType.binding; // 1.2 change
		if ((this.resolvedType.tagBits & TagBits.HierarchyHasProblems) != 0) {
			return null; // stop secondary errors
		}
		MethodBinding inheritedBinding = scope.getConstructor(anonymousSuperclass, argumentTypes, this);
		if (!inheritedBinding.isValidBinding()) {
			if (inheritedBinding.declaringClass == null) {
				inheritedBinding.declaringClass = anonymousSuperclass;
			}
			if (this.type != null && !this.type.resolvedType.isValidBinding()) {
				// problem already got signaled on type reference, do not report secondary problem
				return null;
			}
			scope.problemReporter().invalidConstructor(this, inheritedBinding);
			return this.resolvedType;
		}
		if ((inheritedBinding.tagBits & TagBits.HasMissingType) != 0) {
			scope.problemReporter().missingTypeInConstructor(this, inheritedBinding);
		}
		if (this.enclosingInstance != null) {
			ReferenceBinding targetEnclosing = inheritedBinding.declaringClass.enclosingType();
			if (targetEnclosing == null) {
				scope.problemReporter().unnecessaryEnclosingInstanceSpecification(this.enclosingInstance, superType);
				return this.resolvedType;
			} else if (!enclosingInstanceType.isCompatibleWith(targetEnclosing) && !scope.isBoxingCompatibleWith(enclosingInstanceType, targetEnclosing)) {
				scope.problemReporter().typeMismatchError(enclosingInstanceType, targetEnclosing, this.enclosingInstance, null);
				return this.resolvedType;
			}
			this.enclosingInstance.computeConversion(scope, targetEnclosing, enclosingInstanceType);
		}
		if (this.arguments != null) {
			if (checkInvocationArguments(scope, null, anonymousSuperclass, inheritedBinding, this.arguments, argumentTypes, argsContainCast, this)) {
				this.bits |= ASTNode.Unchecked;
			}
		}
		if (this.typeArguments != null && inheritedBinding.original().typeVariables == Binding.NO_TYPE_VARIABLES) {
			scope.problemReporter().unnecessaryTypeArgumentsForMethodInvocation(inheritedBinding, this.genericTypeArguments, this.typeArguments);
		}
		// Update the anonymous inner class : superclass, interface
		this.binding = this.anonymousType.createDefaultConstructorWithBinding(inheritedBinding, 	(this.bits & ASTNode.Unchecked) != 0 && this.genericTypeArguments == null);
		return this.resolvedType;
	}

	public void traverse(ASTVisitor visitor, BlockScope scope) {
		if (visitor.visit(this, scope)) {
			if (this.enclosingInstance != null)
				this.enclosingInstance.traverse(visitor, scope);
			if (this.typeArguments != null) {
				for (int i = 0, typeArgumentsLength = this.typeArguments.length; i < typeArgumentsLength; i++) {
					this.typeArguments[i].traverse(visitor, scope);
				}
			}
			if (this.type != null) // case of enum constant
				this.type.traverse(visitor, scope);
			if (this.arguments != null) {
				int argumentsLength = this.arguments.length;
				for (int i = 0; i < argumentsLength; i++)
					this.arguments[i].traverse(visitor, scope);
			}
			if (this.anonymousType != null)
				this.anonymousType.traverse(visitor, scope);
		}
		visitor.endVisit(this, scope);
	}
}
