net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/Reference.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v0.5
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v05.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  ******************************************************************************/
  11 package net.sourceforge.phpdt.internal.compiler.ast;
  12
  13 import net.sourceforge.phpdt.internal.compiler.codegen.CodeStream;
  14 import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
  15 import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
  16 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  17 import net.sourceforge.phpdt.internal.compiler.lookup.FieldBinding;
  18 import net.sourceforge.phpdt.internal.compiler.lookup.MethodBinding;
  19 import net.sourceforge.phpdt.internal.compiler.problem.ShouldNotImplement;
  20 import net.sourceforge.phpdt.internal.compiler.util.Util;
  21
  22 public abstract class Reference extends Expression  {
  23 /**
  24  * BaseLevelReference constructor comment.
  25  */
  26 public Reference() {
  27         super();
  28 }
  29 public FlowInfo analyseAssignment(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo, Assignment assignment, boolean isCompound) {
  30         throw new ShouldNotImplement(Util.bind("ast.variableShouldProvide")); //$NON-NLS-1$
  31 }
  32 public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
  33         return flowInfo;
  34 }
  35 public FieldBinding fieldBinding() {
  36         //this method should be sent one FIELD-tagged references
  37         //  (ref.bits & BindingIds.FIELD != 0)()
  38         return null ;
  39 }
  40 public void fieldStore(CodeStream codeStream, FieldBinding fieldBinding, MethodBinding syntheticWriteAccessor, boolean valueRequired) {
  41
  42         if (fieldBinding.isStatic()) {
  43                 if (valueRequired) {
  44                         if ((fieldBinding.type == LongBinding) || (fieldBinding.type == DoubleBinding)) {
  45                                 codeStream.dup2();
  46                         } else {
  47                                 codeStream.dup();
  48                         }
  49                 }
  50                 if (syntheticWriteAccessor == null) {
  51                         codeStream.putstatic(fieldBinding);
  52                 } else {
  53                         codeStream.invokestatic(syntheticWriteAccessor);
  54                 }
  55         } else { // Stack:  [owner][new field value]  ---> [new field value][owner][new field value]
  56                 if (valueRequired) {
  57                         if ((fieldBinding.type == LongBinding) || (fieldBinding.type == DoubleBinding)) {
  58                                 codeStream.dup2_x1();
  59                         } else {
  60                                 codeStream.dup_x1();
  61                         }
  62                 }
  63                 if (syntheticWriteAccessor == null) {
  64                         codeStream.putfield(fieldBinding);
  65                 } else {
  66                         codeStream.invokestatic(syntheticWriteAccessor);
  67                 }
  68         }
  69 }
  70 public void generateAssignment(BlockScope currentScope, CodeStream codeStream, Assignment assignment, boolean valueRequired) {
  71         throw new ShouldNotImplement(Util.bind("ast.compoundPreShouldProvide")); //$NON-NLS-1$
  72 }
  73 public void generateCompoundAssignment(BlockScope currentScope, CodeStream codeStream, Expression expression, int operator, int assignmentImplicitConversion, boolean valueRequired) {
  74         throw new ShouldNotImplement(Util.bind("ast.compoundVariableShouldProvide")); //$NON-NLS-1$
  75 }
  76 public void generatePostIncrement(BlockScope currentScope, CodeStream codeStream, CompoundAssignment postIncrement, boolean valueRequired) {
  77         throw new ShouldNotImplement(Util.bind("ast.postIncrShouldProvide")); //$NON-NLS-1$
  78 }
  79 }