1) Moved net.sourceforge.phpeclipse.ui\src\net\sourceforge\phpdt back to net.sourcefo...
[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / compiler / ast / MessageSend.java
index fd761cc..0295099 100644 (file)
 /*******************************************************************************
- * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
+ * 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 v0.5 
+ * 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-v05.html
+ * http://www.eclipse.org/legal/cpl-v10.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.impl.*;
-import net.sourceforge.phpdt.internal.compiler.flow.*;
-import net.sourceforge.phpdt.internal.compiler.codegen.*;
-import net.sourceforge.phpdt.internal.compiler.lookup.*;
+import net.sourceforge.phpdt.internal.compiler.ASTVisitor;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
+import net.sourceforge.phpdt.internal.compiler.lookup.BindingIds;
+import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
+import net.sourceforge.phpdt.internal.compiler.lookup.InvocationSite;
+import net.sourceforge.phpdt.internal.compiler.lookup.MethodBinding;
+import net.sourceforge.phpdt.internal.compiler.lookup.ProblemMethodBinding;
+import net.sourceforge.phpdt.internal.compiler.lookup.ReferenceBinding;
+import net.sourceforge.phpdt.internal.compiler.lookup.SourceTypeBinding;
+import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
 
 public class MessageSend extends Expression implements InvocationSite {
-       public Expression receiver ;
-       public char[] selector ;
-       public Expression[] arguments ;
+       public Expression receiver;
+
+       public char[] selector;
+
+       public Expression[] arguments;
+
        public MethodBinding binding, codegenBinding;
 
-       public long nameSourcePosition ; //(start<<32)+end
+       public long nameSourcePosition; // (start<<32)+end
 
        MethodBinding syntheticAccessor;
 
        public TypeBinding receiverType, qualifyingType;
-       
-public MessageSend() {
-       
-}
-public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
 
-       flowInfo = receiver.analyseCode(currentScope, flowContext, flowInfo, !binding.isStatic()).unconditionalInits();
-       if (arguments != null) {
-               int length = arguments.length;
-               for (int i = 0; i < length; i++) {
-                       flowInfo = arguments[i].analyseCode(currentScope, flowContext, flowInfo).unconditionalInits();
-               }
-       }
-       ReferenceBinding[] thrownExceptions;
-       if ((thrownExceptions = binding.thrownExceptions) != NoExceptions) {
-               // must verify that exceptions potentially thrown by this expression are caught in the method
-               flowContext.checkExceptionHandlers(thrownExceptions, this, flowInfo, currentScope);
-       }
-       // if invoking through an enclosing instance, then must perform the field generation -- only if reachable
-       manageEnclosingInstanceAccessIfNecessary(currentScope);
-       manageSyntheticAccessIfNecessary(currentScope); 
-       return flowInfo;
-}
-/**
- * MessageSend code generation
- *
- * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
- * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
- * @param valueRequired boolean
- */ 
-public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
-
-       int pc = codeStream.position;
-
-       // generate receiver/enclosing instance access
-       boolean isStatic = codegenBinding.isStatic();
-       // outer access ?
-       if (!isStatic && ((bits & DepthMASK) != 0) && (receiver == ThisReference.ThisImplicit)){
-               // outer method can be reached through emulation if implicit access
-               Object[] path = currentScope.getExactEmulationPath(currentScope.enclosingSourceType().enclosingTypeAt((bits & DepthMASK) >> DepthSHIFT));
-               if (path == null) {
-                       // emulation was not possible (should not happen per construction)
-                       currentScope.problemReporter().needImplementation();
-               } else {
-                       codeStream.generateOuterAccess(path, this, currentScope);
-               }
-       } else {
-               receiver.generateCode(currentScope, codeStream, !isStatic);
-       }
-       // generate arguments
-       if (arguments != null){
-               for (int i = 0, max = arguments.length; i < max; i++){
-                       arguments[i].generateCode(currentScope, codeStream, true);
-               }
+       public MessageSend() {
+
        }
-       // actual message invocation
-       if (syntheticAccessor == null){
-               if (isStatic){
-                       codeStream.invokestatic(codegenBinding);
-               } else {
-                       if( (receiver.isSuper()) || codegenBinding.isPrivate()){
-                               codeStream.invokespecial(codegenBinding);
-                       } else {
-                               if (codegenBinding.declaringClass.isInterface()){
-                                       codeStream.invokeinterface(codegenBinding);
-                               } else {
-                                       codeStream.invokevirtual(codegenBinding);
-                               }
+
+       public FlowInfo analyseCode(BlockScope currentScope,
+                       FlowContext flowContext, FlowInfo flowInfo) {
+
+               flowInfo = receiver.analyseCode(currentScope, flowContext, flowInfo,
+                               !binding.isStatic()).unconditionalInits();
+               if (arguments != null) {
+                       int length = arguments.length;
+                       for (int i = 0; i < length; i++) {
+                               flowInfo = arguments[i].analyseCode(currentScope, flowContext,
+                                               flowInfo).unconditionalInits();
                        }
                }
-       } else {
-               codeStream.invokestatic(syntheticAccessor);
-       }
-       // operation on the returned value
-       if (valueRequired){
-               // implicit conversion if necessary
-               codeStream.generateImplicitConversion(implicitConversion);
-       } else {
-               // pop return value if any
-               switch(binding.returnType.id){
-                       case T_long :
-                       case T_double :
-                               codeStream.pop2();
-                               break;
-                       case T_void :
-                               break;
-                       default:
-                               codeStream.pop();
+               ReferenceBinding[] thrownExceptions;
+               if ((thrownExceptions = binding.thrownExceptions) != NoExceptions) {
+                       // must verify that exceptions potentially thrown by this expression
+                       // are caught in the method
+                       flowContext.checkExceptionHandlers(thrownExceptions, this,
+                                       flowInfo, currentScope);
                }
+               manageSyntheticAccessIfNecessary(currentScope);
+               return flowInfo;
        }
-       codeStream.recordPositionsFrom(pc, (int)(this.nameSourcePosition >>> 32)); // highlight selector
-}
-public boolean isSuperAccess() {       
-       return receiver.isSuper();
-}
-public boolean isTypeAccess() {        
-       return receiver != null && receiver.isTypeReference();
-}
-public void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope) {
-       if (((bits & DepthMASK) != 0) && !binding.isStatic() && (receiver == ThisReference.ThisImplicit)) {
-               ReferenceBinding compatibleType = currentScope.enclosingSourceType();
-               // the declaringClass of the target binding must be compatible with the enclosing
-               // type at <depth> levels outside
-               for (int i = 0, depth = (bits & DepthMASK) >> DepthSHIFT; i < depth; i++) {
-                       compatibleType = compatibleType.enclosingType();
-               }
-               currentScope.emulateOuterAccess((SourceTypeBinding) compatibleType, false); // request cascade of accesses
+
+       /**
+        * MessageSend code generation
+        * 
+        * @param currentScope
+        *            net.sourceforge.phpdt.internal.compiler.lookup.BlockScope
+        * @param codeStream
+        *            net.sourceforge.phpdt.internal.compiler.codegen.CodeStream
+        * @param valueRequired
+        *            boolean
+        */
+       // public void generateCode(BlockScope currentScope, CodeStream codeStream,
+       // boolean valueRequired) {
+       //
+       // int pc = codeStream.position;
+       //
+       // // generate receiver/enclosing instance access
+       // boolean isStatic = codegenBinding.isStatic();
+       // // outer access ?
+       // if (!isStatic && ((bits & DepthMASK) != 0) && receiver.isImplicitThis()){
+       // // outer method can be reached through emulation if implicit access
+       // ReferenceBinding targetType =
+       // currentScope.enclosingSourceType().enclosingTypeAt((bits & DepthMASK) >>
+       // DepthSHIFT);
+       // Object[] path = currentScope.getEmulationPath(targetType, true /*only
+       // exact match*/, false/*consider enclosing arg*/);
+       // codeStream.generateOuterAccess(path, this, targetType, currentScope);
+       // } else {
+       // receiver.generateCode(currentScope, codeStream, !isStatic);
+       // }
+       // // generate arguments
+       // if (arguments != null){
+       // for (int i = 0, max = arguments.length; i < max; i++){
+       // arguments[i].generateCode(currentScope, codeStream, true);
+       // }
+       // }
+       // // actual message invocation
+       // if (syntheticAccessor == null){
+       // if (isStatic){
+       // codeStream.invokestatic(codegenBinding);
+       // } else {
+       // if( (receiver.isSuper()) || codegenBinding.isPrivate()){
+       // codeStream.invokespecial(codegenBinding);
+       // } else {
+       // if (codegenBinding.declaringClass.isInterface()){
+       // codeStream.invokeinterface(codegenBinding);
+       // } else {
+       // codeStream.invokevirtual(codegenBinding);
+       // }
+       // }
+       // }
+       // } else {
+       // codeStream.invokestatic(syntheticAccessor);
+       // }
+       // // operation on the returned value
+       // if (valueRequired){
+       // // implicit conversion if necessary
+       // codeStream.generateImplicitConversion(implicitConversion);
+       // } else {
+       // // pop return value if any
+       // switch(binding.returnType.id){
+       // case T_long :
+       // case T_double :
+       // codeStream.pop2();
+       // break;
+       // case T_void :
+       // break;
+       // default:
+       // codeStream.pop();
+       // }
+       // }
+       // codeStream.recordPositionsFrom(pc, (int)(this.nameSourcePosition >>>
+       // 32)); // highlight selector
+       // }
+       public boolean isSuperAccess() {
+               return receiver.isSuper();
        }
-}
-public void manageSyntheticAccessIfNecessary(BlockScope currentScope){
 
-       if (binding.isPrivate()){
+       public boolean isTypeAccess() {
+               return receiver != null && receiver.isTypeReference();
+       }
 
-               // depth is set for both implicit and explicit access (see MethodBinding#canBeSeenBy)           
-               if (currentScope.enclosingSourceType() != binding.declaringClass){
-               
-                       syntheticAccessor = ((SourceTypeBinding)binding.declaringClass).addSyntheticMethod(binding);
-                       currentScope.problemReporter().needToEmulateMethodAccess(binding, this);
-                       return;
-               }
+       public void manageSyntheticAccessIfNecessary(BlockScope currentScope) {
 
-       } else if (receiver instanceof QualifiedSuperReference){ // qualified super
+               if (binding.isPrivate()) {
 
-               // qualified super need emulation always
-               SourceTypeBinding destinationType = (SourceTypeBinding)(((QualifiedSuperReference)receiver).currentCompatibleType);
-               syntheticAccessor = destinationType.addSyntheticMethod(binding);
-               currentScope.problemReporter().needToEmulateMethodAccess(binding, this);
-               return;
+                       // depth is set for both implicit and explicit access (see
+                       // MethodBinding#canBeSeenBy)
+                       if (currentScope.enclosingSourceType() != binding.declaringClass) {
 
-       } else if (binding.isProtected()){
+                               syntheticAccessor = ((SourceTypeBinding) binding.declaringClass)
+                                               .addSyntheticMethod(binding, isSuperAccess());
+                               currentScope.problemReporter().needToEmulateMethodAccess(
+                                               binding, this);
+                               return;
+                       }
 
-               SourceTypeBinding enclosingSourceType;
-               if (((bits & DepthMASK) != 0) 
-                               && binding.declaringClass.getPackage() 
-                                       != (enclosingSourceType = currentScope.enclosingSourceType()).getPackage()){
+               } else if (receiver instanceof QualifiedSuperReference) { // qualified
+                                                                                                                                       // super
 
-                       SourceTypeBinding currentCompatibleType = (SourceTypeBinding)enclosingSourceType.enclosingTypeAt((bits & DepthMASK) >> DepthSHIFT);
-                       syntheticAccessor = currentCompatibleType.addSyntheticMethod(binding);
-                       currentScope.problemReporter().needToEmulateMethodAccess(binding, this);
+                       // qualified super need emulation always
+                       SourceTypeBinding destinationType = (SourceTypeBinding) (((QualifiedSuperReference) receiver).currentCompatibleType);
+                       syntheticAccessor = destinationType.addSyntheticMethod(binding,
+                                       isSuperAccess());
+                       currentScope.problemReporter().needToEmulateMethodAccess(binding,
+                                       this);
                        return;
+
+               } else if (binding.isProtected()) {
+
+                       SourceTypeBinding enclosingSourceType;
+                       if (((bits & DepthMASK) != 0)
+                                       && binding.declaringClass.getPackage() != (enclosingSourceType = currentScope
+                                                       .enclosingSourceType()).getPackage()) {
+
+                               SourceTypeBinding currentCompatibleType = (SourceTypeBinding) enclosingSourceType
+                                               .enclosingTypeAt((bits & DepthMASK) >> DepthSHIFT);
+                               syntheticAccessor = currentCompatibleType.addSyntheticMethod(
+                                               binding, isSuperAccess());
+                               currentScope.problemReporter().needToEmulateMethodAccess(
+                                               binding, this);
+                               return;
+                       }
                }
+               // if the binding declaring class is not visible, need special action
+               // for runtime compatibility on 1.2 VMs : change the declaring class of
+               // the binding
+               // NOTE: from target 1.2 on, method's declaring class is touched if any
+               // different from receiver type
+               // and not from Object or implicit static method call.
+               // if (binding.declaringClass != this.qualifyingType
+               // && !this.qualifyingType.isArrayType()
+               // && ((currentScope.environment().options.targetJDK >=
+               // CompilerOptions.JDK1_2
+               // && (!receiver.isImplicitThis() || !binding.isStatic())
+               // && binding.declaringClass.id != T_Object) // no change for Object
+               // methods
+               // || !binding.declaringClass.canBeSeenBy(currentScope))) {
+               //
+               // this.codegenBinding =
+               // currentScope.enclosingSourceType().getUpdatedMethodBinding(binding,
+               // (ReferenceBinding) this.qualifyingType);
+               // }
        }
-       // if the binding declaring class is not visible, need special action
-       // for runtime compatibility on 1.2 VMs : change the declaring class of the binding
-       // NOTE: from 1.4 on, method's declaring class is touched if any different from receiver type
-       // and not from Object or implicit static method call.  
-       if (binding.declaringClass != this.qualifyingType
-               && !this.qualifyingType.isArrayType()
-               && ((currentScope.environment().options.complianceLevel >= CompilerOptions.JDK1_4
-                               && (receiver != ThisReference.ThisImplicit || !binding.isStatic())
-                               && binding.declaringClass.id != T_Object) // no change for Object methods
-                       || !binding.declaringClass.canBeSeenBy(currentScope))) {
-
-               this.codegenBinding = currentScope.enclosingSourceType().getUpdatedMethodBinding(binding, (ReferenceBinding) this.qualifyingType);
-       }
-}
 
-public TypeBinding resolveType(BlockScope scope) {
-       // Answer the signature return type
-       // Base type promotion
-
-       constant = NotAConstant;
-       this.qualifyingType = this.receiverType = receiver.resolveType(scope); 
-       
-       // will check for null after args are resolved
-       TypeBinding[] argumentTypes = NoParameters;
-       if (arguments != null) {
-               boolean argHasError = false; // typeChecks all arguments 
-               int length = arguments.length;
-               argumentTypes = new TypeBinding[length];
-               for (int i = 0; i < length; i++){
-                       if ((argumentTypes[i] = arguments[i].resolveType(scope)) == null){
-                               argHasError = true;
+       public StringBuffer printExpression(int indent, StringBuffer output) {
+
+               if (!receiver.isImplicitThis())
+                       receiver.printExpression(0, output).append('.');
+               output.append(selector).append('('); //$NON-NLS-1$
+               if (arguments != null) {
+                       for (int i = 0; i < arguments.length; i++) {
+                               if (i > 0)
+                                       output.append(", "); //$NON-NLS-1$
+                               arguments[i].printExpression(0, output);
                        }
                }
-               if (argHasError){
-                       MethodBinding closestMethod = null;
-                       if(receiverType instanceof ReferenceBinding) {
-                               // record any selector match, for clients who may still need hint about possible method match
-                               this.codegenBinding = this.binding = scope.findMethod((ReferenceBinding)receiverType, selector, new TypeBinding[]{}, this);
-                       }                       
-                       return null;
-               }
+               return output.append(')');
        }
-       if (this.receiverType == null)
-               return null;
 
-       // base type cannot receive any message
-       if (this.receiverType.isBaseType()) {
-               scope.problemReporter().errorNoMethodFor(this, this.receiverType, argumentTypes);
-               return null;
-       }
+       public TypeBinding resolveType(BlockScope scope) {
+               // Answer the signature return type
+               // Base type promotion
+
+               constant = NotAConstant;
+               this.qualifyingType = this.receiverType = receiver.resolveType(scope);
 
-       this.codegenBinding = this.binding = 
-               receiver == ThisReference.ThisImplicit
-                       ? scope.getImplicitMethod(selector, argumentTypes, this)
-                       : scope.getMethod(this.receiverType, selector, argumentTypes, this); 
-       if (!binding.isValidBinding()) {
-               if (binding.declaringClass == null) {
-                       if (this.receiverType instanceof ReferenceBinding) {
-                               binding.declaringClass = (ReferenceBinding) this.receiverType;
-                       } else { // really bad error ....
-                               scope.problemReporter().errorNoMethodFor(this, this.receiverType, argumentTypes);
+               // will check for null after args are resolved
+               TypeBinding[] argumentTypes = NoParameters;
+               if (arguments != null) {
+                       boolean argHasError = false; // typeChecks all arguments
+                       int length = arguments.length;
+                       argumentTypes = new TypeBinding[length];
+                       for (int i = 0; i < length; i++) {
+                               if ((argumentTypes[i] = arguments[i].resolveType(scope)) == null) {
+                                       argHasError = true;
+                               }
+                       }
+                       if (argHasError) {
+                               if (receiverType instanceof ReferenceBinding) {
+                                       // record any selector match, for clients who may still need
+                                       // hint about possible method match
+                                       this.codegenBinding = this.binding = scope.findMethod(
+                                                       (ReferenceBinding) receiverType, selector,
+                                                       new TypeBinding[] {}, this);
+                               }
                                return null;
                        }
                }
-               scope.problemReporter().invalidMethod(this, binding);
-               // record the closest match, for clients who may still need hint about possible method match
-               if (binding.problemId() == ProblemReasons.NotFound){
-                       this.codegenBinding = this.binding = ((ProblemMethodBinding)binding).closestMatch;
+               if (this.receiverType == null)
+                       return null;
+
+               // base type cannot receive any message
+               if (this.receiverType.isBaseType()) {
+                       scope.problemReporter().errorNoMethodFor(this, this.receiverType,
+                                       argumentTypes);
+                       return null;
                }
-               return null;
-       }
-       if (!binding.isStatic()) {
-               // the "receiver" must not be a type, i.e. a NameReference that the TC has bound to a Type
-               if (receiver instanceof NameReference) {
-                       if ((((NameReference) receiver).bits & BindingIds.TYPE) != 0) {
+
+               this.codegenBinding = this.binding = receiver.isImplicitThis() ? scope
+                               .getImplicitMethod(selector, argumentTypes, this) : scope
+                               .getMethod(this.receiverType, selector, argumentTypes, this);
+               if (!binding.isValidBinding()) {
+                       if (binding.declaringClass == null) {
+                               if (this.receiverType instanceof ReferenceBinding) {
+                                       binding.declaringClass = (ReferenceBinding) this.receiverType;
+                               } else {
+                                       scope.problemReporter().errorNoMethodFor(this,
+                                                       this.receiverType, argumentTypes);
+                                       return null;
+                               }
+                       }
+                       scope.problemReporter().invalidMethod(this, binding);
+                       // record the closest match, for clients who may still need hint
+                       // about possible method match
+                       if (binding instanceof ProblemMethodBinding) {
+                               MethodBinding closestMatch = ((ProblemMethodBinding) binding).closestMatch;
+                               if (closestMatch != null)
+                                       this.codegenBinding = this.binding = closestMatch;
+                       }
+                       return binding == null ? null : binding.returnType;
+               }
+               if (!binding.isStatic()) {
+                       // the "receiver" must not be a type, in other words, a
+                       // NameReference that the TC has bound to a Type
+                       if (receiver instanceof NameReference
+                                       && (((NameReference) receiver).bits & BindingIds.TYPE) != 0) {
                                scope.problemReporter().mustUseAStaticMethod(this, binding);
-                               return null;
+                       }
+               } else {
+                       // static message invoked through receiver? legal but unoptimal
+                       // (optional warning).
+                       if (!(receiver.isImplicitThis() || receiver.isSuper() || (receiver instanceof NameReference && (((NameReference) receiver).bits & BindingIds.TYPE) != 0))) {
+                               scope.problemReporter().unnecessaryReceiverForStaticMethod(
+                                               this, binding);
                        }
                }
-       }
-       if (arguments != null)
-               for (int i = 0; i < arguments.length; i++)
-                       arguments[i].implicitWidening(binding.parameters[i], argumentTypes[i]);
-
-       //-------message send that are known to fail at compile time-----------
-       if (binding.isAbstract()) {
-               if (receiver.isSuper()) {
-                       scope.problemReporter().cannotDireclyInvokeAbstractMethod(this, binding);
-                       return null;
+               if (arguments != null)
+                       for (int i = 0; i < arguments.length; i++)
+                               arguments[i].implicitWidening(binding.parameters[i],
+                                               argumentTypes[i]);
+
+               // -------message send that are known to fail at compile time-----------
+               if (binding.isAbstract()) {
+                       if (receiver.isSuper()) {
+                               scope.problemReporter().cannotDireclyInvokeAbstractMethod(this,
+                                               binding);
+                       }
+                       // abstract private methods cannot occur nor abstract
+                       // static............
                }
-               // abstract private methods cannot occur nor abstract static............
+               if (isMethodUseDeprecated(binding, scope))
+                       scope.problemReporter().deprecatedMethod(binding, this);
+
+               return this.resolvedType = binding.returnType;
        }
-       if (isMethodUseDeprecated(binding, scope))
-               scope.problemReporter().deprecatedMethod(binding, this);
 
-       return binding.returnType;
-}
-public void setActualReceiverType(ReferenceBinding receiverType) {
-       this.qualifyingType = receiverType;
-}
-public void setDepth(int depth) {
-       if (depth > 0) {
+       public void setActualReceiverType(ReferenceBinding receiverType) {
+               this.qualifyingType = receiverType;
+       }
+
+       public void setDepth(int depth) {
                bits &= ~DepthMASK; // flush previous depth if any
-               bits |= (depth & 0xFF) << DepthSHIFT; // encoded on 8 bits
+               if (depth > 0) {
+                       bits |= (depth & 0xFF) << DepthSHIFT; // encoded on 8 bits
+               }
        }
-}
-public void setFieldIndex(int depth) {
-       // ignore for here
-}
 
-public String toStringExpression(){
-       
-       String s = ""; //$NON-NLS-1$
-       if (receiver != ThisReference.ThisImplicit)
-               s = s + receiver.toStringExpression()+"."; //$NON-NLS-1$
-       s = s + new String(selector) + "(" ; //$NON-NLS-1$
-       if (arguments != null)
-               for (int i = 0; i < arguments.length ; i ++)
-               {       s = s + arguments[i].toStringExpression();
-                       if ( i != arguments.length -1 ) s = s + " , " ;};; //$NON-NLS-1$
-       s =s + ")" ; //$NON-NLS-1$
-       return s;
-}
+       public void setFieldIndex(int depth) {
+               // ignore for here
+       }
 
-public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope blockScope) {
-       if (visitor.visit(this, blockScope)) {
-               receiver.traverse(visitor, blockScope);
-               if (arguments != null) {
-                       int argumentsLength = arguments.length;
-                       for (int i = 0; i < argumentsLength; i++)
-                               arguments[i].traverse(visitor, blockScope);
+       public String toStringExpression() {
+
+               String s = ""; //$NON-NLS-1$
+               if (!receiver.isImplicitThis())
+                       s = s + receiver.toStringExpression() + "."; //$NON-NLS-1$
+               s = s + new String(selector) + "("; //$NON-NLS-1$
+               if (arguments != null)
+                       for (int i = 0; i < arguments.length; i++) {
+                               s = s + arguments[i].toStringExpression();
+                               if (i != arguments.length - 1)
+                                       s = s + " , ";};; //$NON-NLS-1$
+               s = s + ")"; //$NON-NLS-1$
+               return s;
+       }
+
+       public void traverse(ASTVisitor visitor, BlockScope blockScope) {
+               if (visitor.visit(this, blockScope)) {
+                       receiver.traverse(visitor, blockScope);
+                       if (arguments != null) {
+                               int argumentsLength = arguments.length;
+                               for (int i = 0; i < argumentsLength; i++)
+                                       arguments[i].traverse(visitor, blockScope);
+                       }
                }
+               visitor.endVisit(this, blockScope);
        }
-       visitor.endVisit(this, blockScope);
-}
 }