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

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/internal/compiler/ast/ThisReference.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/internal/compiler/ast/ThisReference.java
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+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/internal/compiler/ast/ThisReference.java
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+/*******************************************************************************
+ * 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
+ *******************************************************************************/
+package net.sourceforge.phpeclipse.internal.compiler.ast;
+
+import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
+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 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 TypeBinding resolveType(BlockScope scope) {
+       
+               constant = NotAConstant;
+               if (!this.isImplicitThis() && !checkAccess(scope.methodScope()))
+                       return null;
+               return this.resolvedType = scope.enclosingSourceType();
+       }
+
+       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);
+       }
+}