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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.ASTVisitor;
  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.InvocationSite;
  18 import net.sourceforge.phpdt.internal.compiler.lookup.LocalTypeBinding;
  19 import net.sourceforge.phpdt.internal.compiler.lookup.MethodBinding;
  20 import net.sourceforge.phpdt.internal.compiler.lookup.MethodScope;
  21 import net.sourceforge.phpdt.internal.compiler.lookup.ReferenceBinding;
  22 import net.sourceforge.phpdt.internal.compiler.lookup.SourceTypeBinding;
  23 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
  24 import net.sourceforge.phpdt.internal.compiler.lookup.VariableBinding;
  25
  26 public class ExplicitConstructorCall
  27         extends Statement
  28         implements InvocationSite {
  29
  30         public Expression[] arguments;
  31         public Expression qualification;
  32         public MethodBinding binding;
  33
  34         public int accessMode;
  35
  36         public final static int ImplicitSuper = 1;
  37         public final static int Super = 2;
  38         public final static int This = 3;
  39
  40         public VariableBinding[][] implicitArguments;
  41         boolean discardEnclosingInstance;
  42
  43         MethodBinding syntheticAccessor;
  44
  45         public ExplicitConstructorCall(int accessMode) {
  46                 this.accessMode = accessMode;
  47         }
  48
  49         public FlowInfo analyseCode(
  50                 BlockScope currentScope,
  51                 FlowContext flowContext,
  52                 FlowInfo flowInfo) {
  53
  54                 // must verify that exceptions potentially thrown by this expression are caught in the method.
  55
  56                 try {
  57                         ((MethodScope) currentScope).isConstructorCall = true;
  58
  59                         // process enclosing instance
  60                         if (qualification != null) {
  61                                 flowInfo =
  62                                         qualification
  63                                                 .analyseCode(currentScope, flowContext, flowInfo)
  64                                                 .unconditionalInits();
  65                         }
  66                         // process arguments
  67                         if (arguments != null) {
  68                                 for (int i = 0, max = arguments.length; i < max; i++) {
  69                                         flowInfo =
  70                                                 arguments[i]
  71                                                         .analyseCode(currentScope, flowContext, flowInfo)
  72                                                         .unconditionalInits();
  73                                 }
  74                         }
  75
  76                         ReferenceBinding[] thrownExceptions;
  77                         if ((thrownExceptions = binding.thrownExceptions) != NoExceptions) {
  78                                 // check exceptions
  79                                 flowContext.checkExceptionHandlers(
  80                                         thrownExceptions,
  81                                         (accessMode == ImplicitSuper)
  82                                                 ? (ASTNode) currentScope.methodScope().referenceContext
  83                                                 : (ASTNode) this,
  84                                         flowInfo,
  85                                         currentScope);
  86                         }
  87                         manageEnclosingInstanceAccessIfNecessary(currentScope);
  88                         manageSyntheticAccessIfNecessary(currentScope);
  89                         return flowInfo;
  90                 } finally {
  91                         ((MethodScope) currentScope).isConstructorCall = false;
  92                 }
  93         }
  94
  95         /**
  96          * Constructor call code generation
  97          *
  98          * @param currentScope net.sourceforge.phpdt.internal.compiler.lookup.BlockScope
  99          * @param codeStream net.sourceforge.phpdt.internal.compiler.codegen.CodeStream
 100          */
 101 //      public void generateCode(BlockScope currentScope, CodeStream codeStream) {
 102 //
 103 //              if ((bits & IsReachableMASK) == 0) {
 104 //                      return;
 105 //              }
 106 //              try {
 107 //                      ((MethodScope) currentScope).isConstructorCall = true;
 108 //
 109 //                      int pc = codeStream.position;
 110 //                      codeStream.aload_0();
 111 //
 112 //                      // handling innerclass constructor invocation
 113 //                      ReferenceBinding targetType = binding.declaringClass;
 114 //                      // handling innerclass instance allocation - enclosing instance arguments
 115 //                      if (targetType.isNestedType()) {
 116 //                              codeStream.generateSyntheticEnclosingInstanceValues(
 117 //                                      currentScope,
 118 //                                      targetType,
 119 //                                      discardEnclosingInstance ? null : qualification,
 120 //                                      this);
 121 //                      }
 122 //                      // regular code gen
 123 //                      if (arguments != null) {
 124 //                              for (int i = 0, max = arguments.length; i < max; i++) {
 125 //                                      arguments[i].generateCode(currentScope, codeStream, true);
 126 //                              }
 127 //                      }
 128 //                      // handling innerclass instance allocation - outer local arguments
 129 //                      if (targetType.isNestedType()) {
 130 //                              codeStream.generateSyntheticOuterArgumentValues(
 131 //                                      currentScope,
 132 //                                      targetType,
 133 //                                      this);
 134 //                      }
 135 //                      if (syntheticAccessor != null) {
 136 //                              // synthetic accessor got some extra arguments appended to its signature, which need values
 137 //                              for (int i = 0,
 138 //                                      max = syntheticAccessor.parameters.length - binding.parameters.length;
 139 //                                      i < max;
 140 //                                      i++) {
 141 //                                      codeStream.aconst_null();
 142 //                              }
 143 //                              codeStream.invokespecial(syntheticAccessor);
 144 //                      } else {
 145 //                              codeStream.invokespecial(binding);
 146 //                      }
 147 //                      codeStream.recordPositionsFrom(pc, this.sourceStart);
 148 //              } finally {
 149 //                      ((MethodScope) currentScope).isConstructorCall = false;
 150 //              }
 151 //      }
 152
 153         public boolean isImplicitSuper() {
 154                 //return true if I'm of these compiler added statement super();
 155
 156                 return (accessMode == ImplicitSuper);
 157         }
 158
 159         public boolean isSuperAccess() {
 160
 161                 return accessMode != This;
 162         }
 163
 164         public boolean isTypeAccess() {
 165
 166                 return true;
 167         }
 168
 169         /* Inner emulation consists in either recording a dependency
 170          * link only, or performing one level of propagation.
 171          *
 172          * Dependency mechanism is used whenever dealing with source target
 173          * types, since by the time we reach them, we might not yet know their
 174          * exact need.
 175          */
 176         void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope) {
 177                 ReferenceBinding superType;
 178
 179                 // perform some emulation work in case there is some and we are inside a local type only
 180                 if ((superType = binding.declaringClass).isNestedType()
 181                         && currentScope.enclosingSourceType().isLocalType()) {
 182
 183                         if (superType.isLocalType()) {
 184                                 ((LocalTypeBinding) superType).addInnerEmulationDependent(currentScope, qualification != null);
 185                         } else {
 186                                 // locally propagate, since we already now the desired shape for sure
 187                                 currentScope.propagateInnerEmulation(superType, qualification != null);
 188                         }
 189                 }
 190         }
 191
 192         public void manageSyntheticAccessIfNecessary(BlockScope currentScope) {
 193
 194                 // perform some emulation work in case there is some and we are inside a local type only
 195                 if (binding.isPrivate() && (accessMode != This)) {
 196
 197 //                      if (currentScope
 198 //                              .environment()
 199 //                              .options
 200 //                              .isPrivateConstructorAccessChangingVisibility) {
 201 //                              binding.tagForClearingPrivateModifier();
 202 //                              // constructor will not be dumped as private, no emulation required thus
 203 //                      } else {
 204                                 syntheticAccessor =
 205                                         ((SourceTypeBinding) binding.declaringClass).addSyntheticMethod(binding, isSuperAccess());
 206                                 currentScope.problemReporter().needToEmulateMethodAccess(binding, this);
 207 //                      }
 208                 }
 209         }
 210
 211         public void resolve(BlockScope scope) {
 212                 // the return type should be void for a constructor.
 213                 // the test is made into getConstructor
 214
 215                 // mark the fact that we are in a constructor call.....
 216                 // unmark at all returns
 217                 try {
 218                         ((MethodScope) scope).isConstructorCall = true;
 219                         ReferenceBinding receiverType = scope.enclosingSourceType();
 220                         if (accessMode != This)
 221                                 receiverType = receiverType.superclass();
 222
 223                         if (receiverType == null) {
 224                                 return;
 225                         }
 226
 227                         // qualification should be from the type of the enclosingType
 228                         if (qualification != null) {
 229                                 if (accessMode != Super) {
 230                                         scope.problemReporter().unnecessaryEnclosingInstanceSpecification(
 231                                                 qualification,
 232                                                 receiverType);
 233                                 }
 234                                 ReferenceBinding enclosingType = receiverType.enclosingType();
 235                                 if (enclosingType == null) {
 236                                         scope.problemReporter().unnecessaryEnclosingInstanceSpecification(
 237                                                 qualification,
 238                                                 receiverType);
 239                                         discardEnclosingInstance = true;
 240                                 } else {
 241                                         TypeBinding qTb = qualification.resolveTypeExpecting(scope, enclosingType);
 242                                         qualification.implicitWidening(qTb, qTb);
 243                                 }
 244                         }
 245
 246                         // arguments buffering for the method lookup
 247                         TypeBinding[] argTypes = NoParameters;
 248                         if (arguments != null) {
 249                                 boolean argHasError = false; // typeChecks all arguments
 250                                 int length = arguments.length;
 251                                 argTypes = new TypeBinding[length];
 252                                 for (int i = 0; i < length; i++)
 253                                         if ((argTypes[i] = arguments[i].resolveType(scope)) == null)
 254                                                 argHasError = true;
 255                                 if (argHasError)
 256                                         return;
 257                         }
 258                         if ((binding = scope.getConstructor(receiverType, argTypes, this))
 259                                 .isValidBinding()) {
 260                                 if (isMethodUseDeprecated(binding, scope))
 261                                         scope.problemReporter().deprecatedMethod(binding, this);
 262
 263                                 // see for user-implicit widening conversion
 264                                 if (arguments != null) {
 265                                         int length = arguments.length;
 266                                         TypeBinding[] paramTypes = binding.parameters;
 267                                         for (int i = 0; i < length; i++)
 268                                                 arguments[i].implicitWidening(paramTypes[i], argTypes[i]);
 269                                 }
 270                                 if (binding.isPrivate()) {
 271                                         binding.modifiers |= AccPrivateUsed;
 272                                 }
 273                         } else {
 274                                 if (binding.declaringClass == null)
 275                                         binding.declaringClass = receiverType;
 276                                 scope.problemReporter().invalidConstructor(this, binding);
 277                         }
 278                 } finally {
 279                         ((MethodScope) scope).isConstructorCall = false;
 280                 }
 281         }
 282
 283         public void setActualReceiverType(ReferenceBinding receiverType) {
 284                 // ignored
 285         }
 286
 287         public void setDepth(int depth) {
 288                 // ignore for here
 289         }
 290
 291         public void setFieldIndex(int depth) {
 292                 // ignore for here
 293         }
 294         public StringBuffer printStatement(int indent, StringBuffer output) {
 295
 296                 printIndent(indent, output);
 297                 if (qualification != null) qualification.printExpression(0, output).append('.');
 298                 if (accessMode == This) {
 299                         output.append("this("); //$NON-NLS-1$
 300                 } else {
 301                         output.append("super("); //$NON-NLS-1$
 302                 }
 303                 if (arguments != null) {
 304                         for (int i = 0; i < arguments.length; i++) {
 305                                 if (i > 0) output.append(", "); //$NON-NLS-1$
 306                                 arguments[i].printExpression(0, output);
 307                         }
 308                 }
 309                 return output.append(");"); //$NON-NLS-1$
 310         }
 311         public String toString(int tab) {
 312
 313                 String s = tabString(tab);
 314                 if (qualification != null)
 315                         s = s + qualification.toStringExpression() + "."; //$NON-NLS-1$
 316                 if (accessMode == This) {
 317                         s = s + "this("; //$NON-NLS-1$
 318                 } else {
 319                         s = s + "super("; //$NON-NLS-1$
 320                 }
 321                 if (arguments != null)
 322                         for (int i = 0; i < arguments.length; i++) {
 323                                 s = s + arguments[i].toStringExpression();
 324                                 if (i != arguments.length - 1)
 325                                         s = s + ", "; //$NON-NLS-1$
 326                         }
 327                 s = s + ")"; //$NON-NLS-1$
 328                 return s;
 329         }
 330
 331         public void traverse(ASTVisitor visitor, BlockScope scope) {
 332
 333                 if (visitor.visit(this, scope)) {
 334                         if (qualification != null) {
 335                                 qualification.traverse(visitor, scope);
 336                         }
 337                         if (arguments != null) {
 338                                 int argumentLength = arguments.length;
 339                                 for (int i = 0; i < argumentLength; i++)
 340                                         arguments[i].traverse(visitor, scope);
 341                         }
 342                 }
 343                 visitor.endVisit(this, scope);
 344         }
 345 }