first scanner /parser copied from the jdt java version

[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / compiler / ast / ThisReference.java

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/ThisReference.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/ThisReference.java
new file mode 100644 (file)
index 0000000..9ae61ea
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/ThisReference.java
@@ -0,0 +1,72 @@
+/*******************************************************************************
+ * 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
+ * 
+ * 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.*;
+
+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;
+       }
+
+       // static may not refer to this/super
+       if (methodScope.isStatic) {
+               methodScope.problemReporter().errorThisSuperInStatic(this);
+               return false;
+       }
+       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);
+}
+}