--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.compiler.ast;
+
+import org.eclipse.jdt.internal.compiler.ASTVisitor;
+import org.eclipse.jdt.internal.compiler.codegen.*;
+import org.eclipse.jdt.internal.compiler.flow.FlowContext;
+import org.eclipse.jdt.internal.compiler.flow.FlowInfo;
+import org.eclipse.jdt.internal.compiler.lookup.*;
+
+public class ThisReference extends Reference {
+
+ public static ThisReference implicitThis(){
+
+ ThisReference implicitThis = new ThisReference(0, 0);
+ implicitThis.bits |= IsImplicitThisMask;
+ return implicitThis;
+ }
+
+ public ThisReference(int sourceStart, int sourceEnd) {
+
+ this.sourceStart = sourceStart;
+ this.sourceEnd = sourceEnd;
+ }
+
+ /*
+ * @see Reference#analyseAssignment(...)
+ */
+ public FlowInfo analyseAssignment(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo, Assignment assignment, boolean isCompound) {
+
+ return flowInfo; // this cannot be assigned
+ }
+
+ public boolean checkAccess(MethodScope methodScope) {
+
+ // this/super cannot be used in constructor call
+ if (methodScope.isConstructorCall) {
+ methodScope.problemReporter().fieldsOrThisBeforeConstructorInvocation(this);
+ return false;
+ }
+
+ // static may not refer to this/super
+ if (methodScope.isStatic) {
+ methodScope.problemReporter().errorThisSuperInStatic(this);
+ return false;
+ }
+ return true;
+ }
+
+ /*
+ * @see Reference#generateAssignment(...)
+ */
+ public void generateAssignment(BlockScope currentScope, CodeStream codeStream, Assignment assignment, boolean valueRequired) {
+
+ // this cannot be assigned
+ }
+
+ public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
+
+ int pc = codeStream.position;
+ if (valueRequired)
+ codeStream.aload_0();
+ if ((this.bits & IsImplicitThisMask) == 0) codeStream.recordPositionsFrom(pc, this.sourceStart);
+ }
+
+ /*
+ * @see Reference#generateCompoundAssignment(...)
+ */
+ public void generateCompoundAssignment(BlockScope currentScope, CodeStream codeStream, Expression expression, int operator, int assignmentImplicitConversion, boolean valueRequired) {
+
+ // this cannot be assigned
+ }
+
+ /*
+ * @see org.eclipse.jdt.internal.compiler.ast.Reference#generatePostIncrement()
+ */
+ public void generatePostIncrement(BlockScope currentScope, CodeStream codeStream, CompoundAssignment postIncrement, boolean valueRequired) {
+
+ // this cannot be assigned
+ }
+
+ public boolean isImplicitThis() {
+
+ return (this.bits & IsImplicitThisMask) != 0;
+ }
+
+ public boolean isThis() {
+
+ return true ;
+ }
+
+ public StringBuffer printExpression(int indent, StringBuffer output){
+
+ if (this.isImplicitThis()) return output;
+ return output.append("this"); //$NON-NLS-1$
+ }
+
+ public TypeBinding resolveType(BlockScope scope) {
+
+ constant = NotAConstant;
+ if (!this.isImplicitThis() &&!checkAccess(scope.methodScope())) {
+ return null;
+ }
+ return this.resolvedType = scope.enclosingSourceType();
+ }
+
+ public void traverse(ASTVisitor visitor, BlockScope blockScope) {
+
+ visitor.visit(this, blockScope);
+ visitor.endVisit(this, blockScope);
+ }
+}