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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpeclipse.internal.compiler.ast;
  12
  13 import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
  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.impl.Constant;
  17 import net.sourceforge.phpdt.internal.compiler.lookup.ArrayBinding;
  18 import net.sourceforge.phpdt.internal.compiler.lookup.BaseTypeBinding;
  19 import net.sourceforge.phpdt.internal.compiler.lookup.FieldBinding;
  20 import net.sourceforge.phpdt.internal.compiler.lookup.MethodScope;
  21 import net.sourceforge.phpdt.internal.compiler.lookup.Scope;
  22 import net.sourceforge.phpdt.internal.compiler.lookup.SourceTypeBinding;
  23 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
  24
  25 public class FieldDeclaration extends AbstractVariableDeclaration {
  26         public FieldBinding binding;
  27         boolean hasBeenResolved = false;
  28
  29         //allows to retrieve both the "type" part of the declaration (part1)
  30         //and also the part that decribe the name and the init and optionally
  31         //some other dimension ! ....
  32         //public int[] a, b[] = X, c ;
  33         //for b that would give for
  34         // - part1 : public int[]
  35         // - part2 : b[] = X,
  36
  37         public int endPart1Position;
  38         public int endPart2Position;
  39
  40         public FieldDeclaration() {
  41         }
  42         public FieldDeclaration(
  43                         char[] name,
  44                         int sourceStart,
  45                         int sourceEnd) {
  46
  47                         this.name = name;
  48
  49                         //due to some declaration like
  50                         // int x, y = 3, z , x ;
  51                         //the sourceStart and the sourceEnd is ONLY on  the name
  52                         this.sourceStart = sourceStart;
  53                         this.sourceEnd = sourceEnd;
  54                 }
  55         public FieldDeclaration(
  56                 Expression initialization,
  57                 char[] name,
  58                 int sourceStart,
  59                 int sourceEnd) {
  60
  61                 this.initialization = initialization;
  62                 this.name = name;
  63
  64                 //due to some declaration like
  65                 // int x, y = 3, z , x ;
  66                 //the sourceStart and the sourceEnd is ONLY on  the name
  67                 this.sourceStart = sourceStart;
  68                 this.sourceEnd = sourceEnd;
  69         }
  70
  71         public FlowInfo analyseCode(
  72                 MethodScope initializationScope,
  73                 FlowContext flowContext,
  74                 FlowInfo flowInfo) {
  75
  76                 if (this.binding != null && this.binding.isPrivate() && !this.binding.isPrivateUsed()) {
  77                         if (!initializationScope.referenceCompilationUnit().compilationResult.hasSyntaxError()) {
  78                                 initializationScope.problemReporter().unusedPrivateField(this);
  79                         }
  80                 }
  81                 // cannot define static non-constant field inside nested class
  82                 if (binding != null
  83                         && binding.isValidBinding()
  84                         && binding.isStatic()
  85                         && binding.constant == NotAConstant
  86                         && binding.declaringClass.isNestedType()
  87                         && binding.declaringClass.isClass()
  88                         && !binding.declaringClass.isStatic()) {
  89                         initializationScope.problemReporter().unexpectedStaticModifierForField(
  90                                 (SourceTypeBinding) binding.declaringClass,
  91                                 this);
  92                 }
  93
  94                 if (initialization != null) {
  95                         flowInfo =
  96                                 initialization
  97                                         .analyseCode(initializationScope, flowContext, flowInfo)
  98                                         .unconditionalInits();
  99                         flowInfo.markAsDefinitelyAssigned(binding);
 100                 }
 101                 return flowInfo;
 102         }
 103
 104         /**
 105          * Code generation for a field declaration:
 106          *         standard assignment to a field
 107          *
 108          * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
 109          * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
 110          */
 111 //      public void generateCode(BlockScope currentScope, CodeStream codeStream) {
 112 //
 113 //              if ((bits & IsReachableMASK) == 0) {
 114 //                      return;
 115 //              }
 116 //              // do not generate initialization code if final and static (constant is then
 117 //              // recorded inside the field itself).
 118 //              int pc = codeStream.position;
 119 //              boolean isStatic;
 120 //              if (initialization != null
 121 //                      && !((isStatic = binding.isStatic()) && binding.constant != NotAConstant)) {
 122 //                      // non-static field, need receiver
 123 //                      if (!isStatic)
 124 //                              codeStream.aload_0();
 125 //                      // generate initialization value
 126 //                      initialization.generateCode(currentScope, codeStream, true);
 127 //                      // store into field
 128 //                      if (isStatic) {
 129 //                              codeStream.putstatic(binding);
 130 //                      } else {
 131 //                              codeStream.putfield(binding);
 132 //                      }
 133 //              }
 134 //              codeStream.recordPositionsFrom(pc, this.sourceStart);
 135 //      }
 136
 137         public TypeBinding getTypeBinding(Scope scope) {
 138
 139                 return type.getTypeBinding(scope);
 140         }
 141
 142         public boolean isField() {
 143
 144                 return true;
 145         }
 146
 147         public boolean isStatic() {
 148
 149                 if (binding != null)
 150                         return binding.isStatic();
 151                 return (modifiers & AccStatic) != 0;
 152         }
 153
 154         public String name() {
 155
 156                 return String.valueOf(name);
 157         }
 158
 159         public void resolve(MethodScope initializationScope) {
 160
 161                 // the two <constant = Constant.NotAConstant> could be regrouped into
 162                 // a single line but it is clearer to have two lines while the reason of their
 163                 // existence is not at all the same. See comment for the second one.
 164
 165                 //--------------------------------------------------------
 166                 if (!this.hasBeenResolved && binding != null && this.binding.isValidBinding()) {
 167
 168                         this.hasBeenResolved = true;
 169
 170                         if (isTypeUseDeprecated(this.binding.type, initializationScope))
 171                                 initializationScope.problemReporter().deprecatedType(this.binding.type, this.type);
 172
 173                         this.type.resolvedType = this.binding.type; // update binding for type reference
 174
 175                         // the resolution of the initialization hasn't been done
 176                         if (this.initialization == null) {
 177                                 this.binding.constant = Constant.NotAConstant;
 178                         } else {
 179                                 int previous = initializationScope.fieldDeclarationIndex;
 180                                 try {
 181                                         initializationScope.fieldDeclarationIndex = this.binding.id;
 182
 183                                         // break dead-lock cycles by forcing constant to NotAConstant
 184                                         this.binding.constant = Constant.NotAConstant;
 185
 186                                         TypeBinding typeBinding = this.binding.type;
 187                                         TypeBinding initializationTypeBinding;
 188
 189                                         if (initialization instanceof ArrayInitializer) {
 190
 191                                                 if ((initializationTypeBinding = this.initialization.resolveTypeExpecting(initializationScope, typeBinding)) != null) {
 192                                                         ((ArrayInitializer) this.initialization).binding = (ArrayBinding) initializationTypeBinding;
 193                                                         this.initialization.implicitWidening(typeBinding, initializationTypeBinding);
 194                                                 }
 195                                         } else if ((initializationTypeBinding = initialization.resolveType(initializationScope)) != null) {
 196
 197                                                 if (this.initialization.isConstantValueOfTypeAssignableToType(initializationTypeBinding, typeBinding)
 198                                                         || (typeBinding.isBaseType() && BaseTypeBinding.isWidening(typeBinding.id, initializationTypeBinding.id))) {
 199
 200                                                         this.initialization.implicitWidening(typeBinding, initializationTypeBinding);
 201
 202                                                 }       else if (initializationTypeBinding.isCompatibleWith(typeBinding)) {
 203                                                         this.initialization.implicitWidening(typeBinding, initializationTypeBinding);
 204
 205                                                 } else {
 206                                                         initializationScope.problemReporter().typeMismatchError(initializationTypeBinding, typeBinding, this);
 207                                                 }
 208                                                 if (this.binding.isFinal()){ // cast from constant actual type to variable type
 209                                                         this.binding.constant =
 210                                                                 this.initialization.constant.castTo(
 211                                                                         (this.binding.type.id << 4) + this.initialization.constant.typeID());
 212                                                 }
 213                                         } else {
 214                                                 this.binding.constant = NotAConstant;
 215                                         }
 216                                 } finally {
 217                                         initializationScope.fieldDeclarationIndex = previous;
 218                                         if (this.binding.constant == null)
 219                                                 this.binding.constant = Constant.NotAConstant;
 220                                 }
 221                         }
 222                 }
 223         }
 224
 225         public void traverse(IAbstractSyntaxTreeVisitor visitor, MethodScope scope) {
 226
 227                 if (visitor.visit(this, scope)) {
 228                         type.traverse(visitor, scope);
 229                         if (initialization != null)
 230                                 initialization.traverse(visitor, scope);
 231                 }
 232                 visitor.endVisit(this, scope);
 233         }
 234 }