-/*******************************************************************************
- * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
- * All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Common Public License v0.5
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v05.html
+/***********************************************************************************************************************************
+ * Copyright (c) 2000, 2003 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
- ******************************************************************************/
+ * Contributors: IBM Corporation - initial API and implementation
+ **********************************************************************************************************************************/
package net.sourceforge.phpdt.internal.compiler.ast;
import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
-import net.sourceforge.phpdt.internal.compiler.codegen.*;
-import net.sourceforge.phpdt.internal.compiler.lookup.*;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
+import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
+import net.sourceforge.phpdt.internal.compiler.lookup.MethodScope;
+import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
public class ThisReference extends Reference {
-
- public static final ThisReference ThisImplicit = new ThisReference();
-
-/**
- * ThisReference constructor comment.
- */
-public ThisReference() {
- super();
-}
-public ThisReference(int s, int sourceEnd) {
- this();
- this.sourceStart = s ;
- this.sourceEnd = sourceEnd;
-}
-protected boolean checkAccess(MethodScope methodScope) {
- // this/super cannot be used in constructor call
- if (methodScope.isConstructorCall) {
- methodScope.problemReporter().fieldsOrThisBeforeConstructorInvocation(this);
- return false;
+
+ 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
+ // net.sourceforge.phpdt.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 TypeBinding resolveType(BlockScope scope) {
+
+ constant = NotAConstant;
+ if (!this.isImplicitThis() && !checkAccess(scope.methodScope()))
+ return null;
+ return this.resolvedType = scope.enclosingSourceType();
}
- // static may not refer to this/super
- if (methodScope.isStatic) {
- methodScope.problemReporter().errorThisSuperInStatic(this);
- return false;
+ public StringBuffer printExpression(int indent, StringBuffer output) {
+
+ if (this.isImplicitThis())
+ return output;
+ return output.append("this"); //$NON-NLS-1$
+ }
+
+ public String toStringExpression() {
+
+ if (this.isImplicitThis())
+ return ""; //$NON-NLS-1$
+ return "this"; //$NON-NLS-1$
+ }
+
+ public void traverse(IAbstractSyntaxTreeVisitor visitor,
+ BlockScope blockScope) {
+
+ visitor.visit(this, blockScope);
+ visitor.endVisit(this, blockScope);
}
- return true;
-}
-public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
- int pc = codeStream.position;
- if (valueRequired)
- codeStream.aload_0();
- codeStream.recordPositionsFrom(pc, this.sourceStart);
-}
-public boolean isThis() {
-
- return true ;
-}
-public TypeBinding resolveType(BlockScope scope) {
- // implicit this
- constant = NotAConstant;
- if (this != ThisImplicit && !checkAccess(scope.methodScope()))
- return null;
- return scope.enclosingSourceType();
-}
-public String toStringExpression(){
-
- if (this == ThisImplicit) return "" ; //$NON-NLS-1$
- return "this"; //$NON-NLS-1$
-}
-public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope blockScope) {
- visitor.visit(this, blockScope);
- visitor.endVisit(this, blockScope);
-}
-}
+}
\ No newline at end of file
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