added h4 (====) gheader template
[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpeclipse / internal / compiler / ast / SingleNameReference.java
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.BlockScope;
18 import net.sourceforge.phpdt.internal.compiler.lookup.FieldBinding;
19 import net.sourceforge.phpdt.internal.compiler.lookup.LocalVariableBinding;
20 import net.sourceforge.phpdt.internal.compiler.lookup.MethodBinding;
21 import net.sourceforge.phpdt.internal.compiler.lookup.MethodScope;
22 import net.sourceforge.phpdt.internal.compiler.lookup.ProblemFieldBinding;
23 import net.sourceforge.phpdt.internal.compiler.lookup.ProblemReferenceBinding;
24 import net.sourceforge.phpdt.internal.compiler.lookup.ReferenceBinding;
25 import net.sourceforge.phpdt.internal.compiler.lookup.SourceTypeBinding;
26 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
27 import net.sourceforge.phpdt.internal.compiler.lookup.VariableBinding;
28
29 public class SingleNameReference extends NameReference implements OperatorIds {
30         public char[] token;
31
32         public MethodBinding[] syntheticAccessors; // [0]=read accessor [1]=write accessor
33         public static final int READ = 0;
34         public static final int WRITE = 1;
35         
36 public SingleNameReference(char[] source, long pos) {
37         super();
38         token = source;
39         sourceStart = (int) (pos >>> 32);
40         sourceEnd = (int) pos;
41 }
42 public FlowInfo analyseAssignment(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo, Assignment assignment, boolean isCompound) {
43
44         // compound assignment extra work
45         if (isCompound) { // check the variable part is initialized if blank final
46                 switch (bits & RestrictiveFlagMASK) {
47                         case FIELD : // reading a field
48                                 FieldBinding fieldBinding;
49                                 if ((fieldBinding = (FieldBinding) binding).isBlankFinal() 
50                                                 && currentScope.allowBlankFinalFieldAssignment(fieldBinding)) {
51                                         if (!flowInfo.isDefinitelyAssigned(fieldBinding)) {
52                                                 currentScope.problemReporter().uninitializedBlankFinalField(fieldBinding, this);
53                                         }
54                                 }
55                                 manageSyntheticReadAccessIfNecessary(currentScope);
56                                 break;
57                         case LOCAL : // reading a local variable
58                                 // check if assigning a final blank field
59                                 LocalVariableBinding localBinding;
60                                 if (!flowInfo.isDefinitelyAssigned(localBinding = (LocalVariableBinding) binding)) {
61                                         currentScope.problemReporter().uninitializedLocalVariable(localBinding, this);
62                                         // we could improve error msg here telling "cannot use compound assignment on final local variable"
63                                 }
64                                 if (flowInfo.isReachable()) {
65                                         localBinding.useFlag = LocalVariableBinding.USED;
66                                 } else if (localBinding.useFlag == LocalVariableBinding.UNUSED) {
67                                         localBinding.useFlag = LocalVariableBinding.FAKE_USED;
68                                 }
69                 }
70         }
71         if (assignment.expression != null) {
72                 flowInfo = assignment.expression.analyseCode(currentScope, flowContext, flowInfo).unconditionalInits();
73         }
74         switch (bits & RestrictiveFlagMASK) {
75                 case FIELD : // assigning to a field
76                         manageSyntheticWriteAccessIfNecessary(currentScope);
77
78                         // check if assigning a final field
79                         FieldBinding fieldBinding;
80                         if ((fieldBinding = (FieldBinding) binding).isFinal()) {
81                                 // inside a context where allowed
82                                 if (!isCompound && fieldBinding.isBlankFinal() && currentScope.allowBlankFinalFieldAssignment(fieldBinding)) {
83                                         if (flowInfo.isPotentiallyAssigned(fieldBinding)) {
84                                                 currentScope.problemReporter().duplicateInitializationOfBlankFinalField(fieldBinding, this);
85                                         } else {
86                                                 flowContext.recordSettingFinal(fieldBinding, this);                                             
87                                         }
88                                         flowInfo.markAsDefinitelyAssigned(fieldBinding);
89                                 } else {
90                                         currentScope.problemReporter().cannotAssignToFinalField(fieldBinding, this);
91                                 }
92                         }
93                         break;
94                 case LOCAL : // assigning to a local variable 
95                         LocalVariableBinding localBinding = (LocalVariableBinding) binding;
96                         if (!flowInfo.isDefinitelyAssigned(localBinding)){// for local variable debug attributes
97                                 bits |= FirstAssignmentToLocalMASK;
98                         } else {
99                                 bits &= ~FirstAssignmentToLocalMASK;
100                         }
101                         if (localBinding.isFinal()) {
102                                 if ((bits & DepthMASK) == 0) {
103                                         if (isCompound || !localBinding.isBlankFinal()){
104                                                 currentScope.problemReporter().cannotAssignToFinalLocal(localBinding, this);
105                                         } else if (flowInfo.isPotentiallyAssigned(localBinding)) {
106                                                 currentScope.problemReporter().duplicateInitializationOfFinalLocal(localBinding, this);
107                                         } else {
108                                                 flowContext.recordSettingFinal(localBinding, this);                                                             
109                                         }
110                                 } else {
111                                         currentScope.problemReporter().cannotAssignToFinalOuterLocal(localBinding, this);
112                                 }
113                         }
114                         flowInfo.markAsDefinitelyAssigned(localBinding);
115         }
116         manageEnclosingInstanceAccessIfNecessary(currentScope);
117         return flowInfo;
118 }
119 public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
120         return analyseCode(currentScope, flowContext, flowInfo, true);
121 }
122 public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo, boolean valueRequired) {
123
124         switch (bits & RestrictiveFlagMASK) {
125                 case FIELD : // reading a field
126                         if (valueRequired) {
127                                 manageSyntheticReadAccessIfNecessary(currentScope);
128                         }
129                         // check if reading a final blank field
130                         FieldBinding fieldBinding;
131                         if ((fieldBinding = (FieldBinding) binding).isBlankFinal() 
132                                         && currentScope.allowBlankFinalFieldAssignment(fieldBinding)) {
133                                 if (!flowInfo.isDefinitelyAssigned(fieldBinding)) {
134                                         currentScope.problemReporter().uninitializedBlankFinalField(fieldBinding, this);
135                                 }
136                         }
137                         break;
138                 case LOCAL : // reading a local variable
139                         LocalVariableBinding localBinding;
140                         if (!flowInfo.isDefinitelyAssigned(localBinding = (LocalVariableBinding) binding)) {
141                                 currentScope.problemReporter().uninitializedLocalVariable(localBinding, this);
142                         }
143                         if (flowInfo.isReachable()) {
144                                 localBinding.useFlag = LocalVariableBinding.USED;
145                         } else if (localBinding.useFlag == LocalVariableBinding.UNUSED) {
146                                 localBinding.useFlag = LocalVariableBinding.FAKE_USED;
147                         }
148         }
149         if (valueRequired) {
150                 manageEnclosingInstanceAccessIfNecessary(currentScope);
151         }
152         return flowInfo;
153 }
154 public TypeBinding checkFieldAccess(BlockScope scope) {
155
156         FieldBinding fieldBinding = (FieldBinding) binding;
157         
158         bits &= ~RestrictiveFlagMASK; // clear bits
159         bits |= FIELD;
160         if (!((FieldBinding) binding).isStatic()) {
161                 // must check for the static status....
162                 if (scope.methodScope().isStatic) {
163                         scope.problemReporter().staticFieldAccessToNonStaticVariable(this, fieldBinding);
164                         constant = NotAConstant;
165                         return fieldBinding.type;
166                 }
167         }
168         constant = FieldReference.getConstantFor(fieldBinding, this, true, scope);
169
170         if (isFieldUseDeprecated(fieldBinding, scope))
171                 scope.problemReporter().deprecatedField(fieldBinding, this);
172
173         MethodScope ms = scope.methodScope();
174         if ((this.bits & IsStrictlyAssignedMASK) == 0
175                 && ms.enclosingSourceType() == fieldBinding.declaringClass
176                 && ms.fieldDeclarationIndex != MethodScope.NotInFieldDecl
177                 && fieldBinding.id >= ms.fieldDeclarationIndex) {
178                 //if the field is static and ms is not .... then it is valid
179                 if (!fieldBinding.isStatic() || ms.isStatic)
180                         scope.problemReporter().forwardReference(this, 0, scope.enclosingSourceType());
181         }
182         //====================================================
183
184         return fieldBinding.type;
185
186 }
187 //public void generateAssignment(BlockScope currentScope, CodeStream codeStream, Assignment assignment, boolean valueRequired) {
188 //
189 //      // optimizing assignment like: i = i + 1 or i = 1 + i
190 //      if (assignment.expression.isCompactableOperation()) {
191 //              BinaryExpression operation = (BinaryExpression) assignment.expression;
192 //              SingleNameReference variableReference;
193 //              if ((operation.left instanceof SingleNameReference) && ((variableReference = (SingleNameReference) operation.left).binding == binding)) {
194 //                      // i = i + value, then use the variable on the right hand side, since it has the correct implicit conversion
195 //                      variableReference.generateCompoundAssignment(currentScope, codeStream, syntheticAccessors == null ? null : syntheticAccessors[WRITE], operation.right, (operation.bits & OperatorMASK) >> OperatorSHIFT, operation.left.implicitConversion /*should be equivalent to no conversion*/, valueRequired);
196 //                      return;
197 //              }
198 //              int operator = (operation.bits & OperatorMASK) >> OperatorSHIFT;
199 //              if ((operation.right instanceof SingleNameReference)
200 //                      && ((operator == PLUS) || (operator == MULTIPLY)) // only commutative operations
201 //                      && ((variableReference = (SingleNameReference) operation.right).binding == binding)
202 //                      && (operation.left.constant != NotAConstant) // exclude non constant expressions, since could have side-effect
203 //                      && ((operation.left.implicitConversion >> 4) != T_String) // exclude string concatenation which would occur backwards
204 //                      && ((operation.right.implicitConversion >> 4) != T_String)) { // exclude string concatenation which would occur backwards
205 //                      // i = value + i, then use the variable on the right hand side, since it has the correct implicit conversion
206 //                      variableReference.generateCompoundAssignment(currentScope, codeStream, syntheticAccessors == null ? null : syntheticAccessors[WRITE], operation.left, operator, operation.right.implicitConversion /*should be equivalent to no conversion*/, valueRequired);
207 //                      return;
208 //              }
209 //      }
210 //      switch (bits & RestrictiveFlagMASK) {
211 //              case FIELD : // assigning to a field
212 //                      FieldBinding fieldBinding;
213 //                      if (!(fieldBinding = (FieldBinding) this.codegenBinding).isStatic()) { // need a receiver?
214 //                              if ((bits & DepthMASK) != 0) {
215 //                                      ReferenceBinding targetType = currentScope.enclosingSourceType().enclosingTypeAt((bits & DepthMASK) >> DepthSHIFT);
216 //                                      Object[] emulationPath = currentScope.getEmulationPath(targetType, true /*only exact match*/, false/*consider enclosing arg*/);
217 //                                      codeStream.generateOuterAccess(emulationPath, this, targetType, currentScope);
218 //                              } else {
219 //                                      this.generateReceiver(codeStream);
220 //                              }
221 //                      }
222 //                      assignment.expression.generateCode(currentScope, codeStream, true);
223 //                      fieldStore(codeStream, fieldBinding, syntheticAccessors == null ? null : syntheticAccessors[WRITE], valueRequired);
224 //                      if (valueRequired) {
225 //                              codeStream.generateImplicitConversion(assignment.implicitConversion);
226 //                      }
227 //                      return;
228 //              case LOCAL : // assigning to a local variable
229 //                      LocalVariableBinding localBinding = (LocalVariableBinding) this.codegenBinding;
230 //                      if (localBinding.resolvedPosition != -1) {
231 //                              assignment.expression.generateCode(currentScope, codeStream, true);
232 //                      } else {
233 //                              if (assignment.expression.constant != NotAConstant) {
234 //                                      // assigning an unused local to a constant value = no actual assignment is necessary
235 //                                      if (valueRequired) {
236 //                                              codeStream.generateConstant(assignment.expression.constant, assignment.implicitConversion);
237 //                                      }
238 //                              } else {
239 //                                      assignment.expression.generateCode(currentScope, codeStream, true);
240 //                                      /* Even though the value may not be required, we force it to be produced, and discard it later
241 //                                      on if it was actually not necessary, so as to provide the same behavior as JDK1.2beta3. */
242 //                                      if (valueRequired) {
243 //                                              codeStream.generateImplicitConversion(assignment.implicitConversion); // implicit conversion
244 //                                      } else {
245 //                                              if ((localBinding.type == LongBinding) || (localBinding.type == DoubleBinding)) {
246 //                                                      codeStream.pop2();
247 //                                              } else {
248 //                                                      codeStream.pop();
249 //                                              }
250 //                                      }
251 //                              }
252 //                              return;
253 //                      }
254 //                      // 26903, need extra cast to store null in array local var      
255 //                      if (localBinding.type.isArrayType() 
256 //                              && (assignment.expression.resolvedType == NullBinding   // arrayLoc = null
257 //                                      || ((assignment.expression instanceof CastExpression)   // arrayLoc = (type[])null
258 //                                              && (((CastExpression)assignment.expression).innermostCastedExpression().resolvedType == NullBinding)))){
259 //                              codeStream.checkcast(localBinding.type); 
260 //                      }
261 //                      
262 //                      // normal local assignment (since cannot store in outer local which are final locations)
263 //                      codeStream.store(localBinding, valueRequired);
264 //                      if ((bits & FirstAssignmentToLocalMASK) != 0) { // for local variable debug attributes
265 //                              localBinding.recordInitializationStartPC(codeStream.position);
266 //                      }
267 //                      // implicit conversion
268 //                      if (valueRequired) {
269 //                              codeStream.generateImplicitConversion(assignment.implicitConversion);
270 //                      }
271 //      }
272 //}
273 //public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
274 //      int pc = codeStream.position;
275 //      if (constant != NotAConstant) {
276 //              if (valueRequired) {
277 //                      codeStream.generateConstant(constant, implicitConversion);
278 //              }
279 //      } else {
280 //              switch (bits & RestrictiveFlagMASK) {
281 //                      case FIELD : // reading a field
282 //                              FieldBinding fieldBinding;
283 //                              if (valueRequired) {
284 //                                      if ((fieldBinding = (FieldBinding) this.codegenBinding).constant == NotAConstant) { // directly use inlined value for constant fields
285 //                                              boolean isStatic;
286 //                                              if (!(isStatic = fieldBinding.isStatic())) {
287 //                                                      if ((bits & DepthMASK) != 0) {
288 //                                                              ReferenceBinding targetType = currentScope.enclosingSourceType().enclosingTypeAt((bits & DepthMASK) >> DepthSHIFT);
289 //                                                              Object[] emulationPath = currentScope.getEmulationPath(targetType, true /*only exact match*/, false/*consider enclosing arg*/);
290 //                                                              codeStream.generateOuterAccess(emulationPath, this, targetType, currentScope);
291 //                                                      } else {
292 //                                                              generateReceiver(codeStream);
293 //                                                      }
294 //                                              }
295 //                                              // managing private access                                                      
296 //                                              if ((syntheticAccessors == null) || (syntheticAccessors[READ] == null)) {
297 //                                                      if (isStatic) {
298 //                                                              codeStream.getstatic(fieldBinding);
299 //                                                      } else {
300 //                                                              codeStream.getfield(fieldBinding);
301 //                                                      }
302 //                                              } else {
303 //                                                      codeStream.invokestatic(syntheticAccessors[READ]);
304 //                                              }
305 //                                              codeStream.generateImplicitConversion(implicitConversion);
306 //                                      } else { // directly use the inlined value
307 //                                              codeStream.generateConstant(fieldBinding.constant, implicitConversion);
308 //                                      }
309 //                              }
310 //                              break;
311 //                      case LOCAL : // reading a local
312 //                              LocalVariableBinding localBinding = (LocalVariableBinding) this.codegenBinding;
313 //                              if (valueRequired) {
314 //                                      // outer local?
315 //                                      if ((bits & DepthMASK) != 0) {
316 //                                              // outer local can be reached either through a synthetic arg or a synthetic field
317 //                                              VariableBinding[] path = currentScope.getEmulationPath(localBinding);
318 //                                              codeStream.generateOuterAccess(path, this, localBinding, currentScope);
319 //                                      } else {
320 //                                              // regular local variable read
321 //                                              codeStream.load(localBinding);
322 //                                      }
323 //                                      codeStream.generateImplicitConversion(implicitConversion);
324 //                              }
325 //              }
326 //      }
327 //      codeStream.recordPositionsFrom(pc, this.sourceStart);
328 //}
329 ///*
330 // * Regular API for compound assignment, relies on the fact that there is only one reference to the
331 // * variable, which carries both synthetic read/write accessors.
332 // * The APIs with an extra argument is used whenever there are two references to the same variable which
333 // * are optimized in one access: e.g "a = a + 1" optimized into "a++".
334 // */
335 //public void generateCompoundAssignment(BlockScope currentScope, CodeStream codeStream, Expression expression, int operator, int assignmentImplicitConversion, boolean valueRequired) {
336 //
337 //      this.generateCompoundAssignment(
338 //              currentScope, 
339 //              codeStream, 
340 //              syntheticAccessors == null ? null : syntheticAccessors[WRITE],
341 //              expression,
342 //              operator, 
343 //              assignmentImplicitConversion, 
344 //              valueRequired);
345 //}
346 ///*
347 // * The APIs with an extra argument is used whenever there are two references to the same variable which
348 // * are optimized in one access: e.g "a = a + 1" optimized into "a++".
349 // */
350 //public void generateCompoundAssignment(BlockScope currentScope, CodeStream codeStream, MethodBinding writeAccessor, Expression expression, int operator, int assignmentImplicitConversion, boolean valueRequired) {
351 //      switch (bits & RestrictiveFlagMASK) {
352 //              case FIELD : // assigning to a field
353 //                      FieldBinding fieldBinding;
354 //                      if ((fieldBinding = (FieldBinding) this.codegenBinding).isStatic()) {
355 //                              if ((syntheticAccessors == null) || (syntheticAccessors[READ] == null)) {
356 //                                      codeStream.getstatic(fieldBinding);
357 //                              } else {
358 //                                      codeStream.invokestatic(syntheticAccessors[READ]);
359 //                              }
360 //                      } else {
361 //                              if ((bits & DepthMASK) != 0) {
362 //                                      ReferenceBinding targetType = currentScope.enclosingSourceType().enclosingTypeAt((bits & DepthMASK) >> DepthSHIFT);
363 //                                      Object[] emulationPath = currentScope.getEmulationPath(targetType, true /*only exact match*/, false/*consider enclosing arg*/);
364 //                                      codeStream.generateOuterAccess(emulationPath, this, targetType, currentScope);
365 //                              } else {
366 //                                      codeStream.aload_0();
367 //                              }
368 //                              codeStream.dup();
369 //                              if ((syntheticAccessors == null) || (syntheticAccessors[READ] == null)) {
370 //                                      codeStream.getfield(fieldBinding);
371 //                              } else {
372 //                                      codeStream.invokestatic(syntheticAccessors[READ]);
373 //                              }
374 //                      }
375 //                      break;
376 //              case LOCAL : // assigning to a local variable (cannot assign to outer local)
377 //                      LocalVariableBinding localBinding = (LocalVariableBinding) this.codegenBinding;
378 //                      Constant assignConstant;
379 //                      int increment;
380 //                      // using incr bytecode if possible
381 //                      switch (localBinding.type.id) {
382 //                              case T_String :
383 //                                      codeStream.generateStringAppend(currentScope, this, expression);
384 //                                      if (valueRequired) {
385 //                                              codeStream.dup();
386 //                                      }
387 //                                      codeStream.store(localBinding, false);
388 //                                      return;
389 //                              case T_int :
390 //                                      if (((assignConstant = expression.constant) != NotAConstant) 
391 //                                              && (assignConstant.typeID() != T_float) // only for integral types
392 //                                              && (assignConstant.typeID() != T_double)
393 //                                              && ((increment = assignConstant.intValue()) == (short) increment)) { // 16 bits value
394 //                                              switch (operator) {
395 //                                                      case PLUS :
396 //                                                              codeStream.iinc(localBinding.resolvedPosition, increment);
397 //                                                              if (valueRequired) {
398 //                                                                      codeStream.load(localBinding);
399 //                                                              }
400 //                                                              return;
401 //                                                      case MINUS :
402 //                                                              codeStream.iinc(localBinding.resolvedPosition, -increment);
403 //                                                              if (valueRequired) {
404 //                                                                      codeStream.load(localBinding);
405 //                                                              }
406 //                                                              return;
407 //                                              }
408 //                                      }
409 //                              default :
410 //                                      codeStream.load(localBinding);
411 //                      }
412 //      }
413 //      // perform the actual compound operation
414 //      int operationTypeID;
415 //      if ((operationTypeID = implicitConversion >> 4) == T_String || operationTypeID == T_Object) {
416 //              // we enter here if the single name reference is a field of type java.lang.String or if the type of the 
417 //              // operation is java.lang.Object
418 //              // For example: o = o + ""; // where the compiled type of o is java.lang.Object.
419 //              codeStream.generateStringAppend(currentScope, null, expression);
420 //      } else {
421 //              // promote the array reference to the suitable operation type
422 //              codeStream.generateImplicitConversion(implicitConversion);
423 //              // generate the increment value (will by itself  be promoted to the operation value)
424 //              if (expression == IntLiteral.One){ // prefix operation
425 //                      codeStream.generateConstant(expression.constant, implicitConversion);                   
426 //              } else {
427 //                      expression.generateCode(currentScope, codeStream, true);
428 //              }               
429 //              // perform the operation
430 //              codeStream.sendOperator(operator, operationTypeID);
431 //              // cast the value back to the array reference type
432 //              codeStream.generateImplicitConversion(assignmentImplicitConversion);
433 //      }
434 //      // store the result back into the variable
435 //      switch (bits & RestrictiveFlagMASK) {
436 //              case FIELD : // assigning to a field
437 //                      fieldStore(codeStream, (FieldBinding) this.codegenBinding, writeAccessor, valueRequired);
438 //                      return;
439 //              case LOCAL : // assigning to a local variable
440 //                      LocalVariableBinding localBinding = (LocalVariableBinding) this.codegenBinding;
441 //                      if (valueRequired) {
442 //                              if ((localBinding.type == LongBinding) || (localBinding.type == DoubleBinding)) {
443 //                                      codeStream.dup2();
444 //                              } else {
445 //                                      codeStream.dup();
446 //                              }
447 //                      }
448 //                      codeStream.store(localBinding, false);
449 //      }
450 //}
451 //public void generatePostIncrement(BlockScope currentScope, CodeStream codeStream, CompoundAssignment postIncrement, boolean valueRequired) {
452 //      switch (bits & RestrictiveFlagMASK) {
453 //              case FIELD : // assigning to a field
454 //                      FieldBinding fieldBinding;
455 //                      if ((fieldBinding = (FieldBinding) this.codegenBinding).isStatic()) {
456 //                              if ((syntheticAccessors == null) || (syntheticAccessors[READ] == null)) {
457 //                                      codeStream.getstatic(fieldBinding);
458 //                              } else {
459 //                                      codeStream.invokestatic(syntheticAccessors[READ]);
460 //                              }
461 //                      } else {
462 //                              if ((bits & DepthMASK) != 0) {
463 //                                      ReferenceBinding targetType = currentScope.enclosingSourceType().enclosingTypeAt((bits & DepthMASK) >> DepthSHIFT);
464 //                                      Object[] emulationPath = currentScope.getEmulationPath(targetType, true /*only exact match*/, false/*consider enclosing arg*/);
465 //                                      codeStream.generateOuterAccess(emulationPath, this, targetType, currentScope);
466 //                              } else {
467 //                                      codeStream.aload_0();
468 //                              }
469 //                              codeStream.dup();
470 //                              if ((syntheticAccessors == null) || (syntheticAccessors[READ] == null)) {
471 //                                      codeStream.getfield(fieldBinding);
472 //                              } else {
473 //                                      codeStream.invokestatic(syntheticAccessors[READ]);
474 //                              }
475 //                      }
476 //                      if (valueRequired) {
477 //                              if (fieldBinding.isStatic()) {
478 //                                      if ((fieldBinding.type == LongBinding) || (fieldBinding.type == DoubleBinding)) {
479 //                                              codeStream.dup2();
480 //                                      } else {
481 //                                              codeStream.dup();
482 //                                      }
483 //                              } else { // Stack:  [owner][old field value]  ---> [old field value][owner][old field value]
484 //                                      if ((fieldBinding.type == LongBinding) || (fieldBinding.type == DoubleBinding)) {
485 //                                              codeStream.dup2_x1();
486 //                                      } else {
487 //                                              codeStream.dup_x1();
488 //                                      }
489 //                              }
490 //                      }
491 //                      codeStream.generateConstant(postIncrement.expression.constant, implicitConversion);
492 //                      codeStream.sendOperator(postIncrement.operator, fieldBinding.type.id);
493 //                      codeStream.generateImplicitConversion(postIncrement.assignmentImplicitConversion);
494 //                      fieldStore(codeStream, fieldBinding, syntheticAccessors == null ? null : syntheticAccessors[WRITE], false);
495 //                      return;
496 //              case LOCAL : // assigning to a local variable
497 //                      LocalVariableBinding localBinding = (LocalVariableBinding) this.codegenBinding;
498 //                      // using incr bytecode if possible
499 //                      if (localBinding.type == IntBinding) {
500 //                              if (valueRequired) {
501 //                                      codeStream.load(localBinding);
502 //                              }
503 //                              if (postIncrement.operator == PLUS) {
504 //                                      codeStream.iinc(localBinding.resolvedPosition, 1);
505 //                              } else {
506 //                                      codeStream.iinc(localBinding.resolvedPosition, -1);
507 //                              }
508 //                      } else {
509 //                              codeStream.load(localBinding);
510 //                              if (valueRequired){
511 //                                      if ((localBinding.type == LongBinding) || (localBinding.type == DoubleBinding)) {
512 //                                              codeStream.dup2();
513 //                                      } else {
514 //                                              codeStream.dup();
515 //                                      }
516 //                              }
517 //                              codeStream.generateConstant(postIncrement.expression.constant, implicitConversion);
518 //                              codeStream.sendOperator(postIncrement.operator, localBinding.type.id);
519 //                              codeStream.generateImplicitConversion(postIncrement.assignmentImplicitConversion);
520 //
521 //                              codeStream.store(localBinding, false);
522 //                      }
523 //      }
524 //}
525 //public void generateReceiver(CodeStream codeStream) {
526 //      codeStream.aload_0();
527 //}
528 public void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope) {
529
530         //If inlinable field, forget the access emulation, the code gen will directly target it
531         if (((bits & DepthMASK) == 0) || (constant != NotAConstant)) return;
532
533         if ((bits & RestrictiveFlagMASK) == LOCAL) {
534                 currentScope.emulateOuterAccess((LocalVariableBinding) binding);
535         }
536 }
537 public void manageSyntheticReadAccessIfNecessary(BlockScope currentScope) {
538
539         //If inlinable field, forget the access emulation, the code gen will directly target it
540         if (constant != NotAConstant)
541                 return;
542
543         if ((bits & FIELD) != 0) {
544                 FieldBinding fieldBinding = (FieldBinding) binding;
545                 if (((bits & DepthMASK) != 0)
546                         && (fieldBinding.isPrivate() // private access
547                                 || (fieldBinding.isProtected() // implicit protected access
548                                                 && fieldBinding.declaringClass.getPackage() 
549                                                         != currentScope.enclosingSourceType().getPackage()))) {
550                         if (syntheticAccessors == null)
551                                 syntheticAccessors = new MethodBinding[2];
552                         syntheticAccessors[READ] = 
553                                 ((SourceTypeBinding)currentScope.enclosingSourceType().
554                                         enclosingTypeAt((bits & DepthMASK) >> DepthSHIFT)).
555                                                 addSyntheticMethod(fieldBinding, true);
556                         currentScope.problemReporter().needToEmulateFieldReadAccess(fieldBinding, this);
557                         return;
558                 }
559                 // if the binding declaring class is not visible, need special action
560                 // for runtime compatibility on 1.2 VMs : change the declaring class of the binding
561                 // NOTE: from target 1.2 on, field's declaring class is touched if any different from receiver type
562                 // and not from Object or implicit static field access. 
563 //              if (fieldBinding.declaringClass != this.actualReceiverType
564 //                      && !this.actualReceiverType.isArrayType()       
565 //                      && fieldBinding.declaringClass != null
566 //                      && fieldBinding.constant == NotAConstant
567 //                      && ((currentScope.environment().options.targetJDK >= CompilerOptions.JDK1_2 
568 //                                      && !fieldBinding.isStatic()
569 //                                      && fieldBinding.declaringClass.id != T_Object) // no change for Object fields (if there was any)
570 //                              || !fieldBinding.declaringClass.canBeSeenBy(currentScope))){
571 //                      this.codegenBinding = currentScope.enclosingSourceType().getUpdatedFieldBinding(fieldBinding, (ReferenceBinding)this.actualReceiverType);
572 //              }
573         }
574 }
575 public void manageSyntheticWriteAccessIfNecessary(BlockScope currentScope) {
576
577         if ((bits & FIELD) != 0) {
578                 FieldBinding fieldBinding = (FieldBinding) binding;
579                 if (((bits & DepthMASK) != 0) 
580                         && (fieldBinding.isPrivate() // private access
581                                 || (fieldBinding.isProtected() // implicit protected access
582                                                 && fieldBinding.declaringClass.getPackage() 
583                                                         != currentScope.enclosingSourceType().getPackage()))) {
584                         if (syntheticAccessors == null)
585                                 syntheticAccessors = new MethodBinding[2];
586                         syntheticAccessors[WRITE] = 
587                                 ((SourceTypeBinding)currentScope.enclosingSourceType().
588                                         enclosingTypeAt((bits & DepthMASK) >> DepthSHIFT)).
589                                                 addSyntheticMethod(fieldBinding, false);
590                         currentScope.problemReporter().needToEmulateFieldWriteAccess(fieldBinding, this);
591                         return;
592                 }
593                 // if the binding declaring class is not visible, need special action
594                 // for runtime compatibility on 1.2 VMs : change the declaring class of the binding
595                 // NOTE: from target 1.2 on, field's declaring class is touched if any different from receiver type
596                 // and not from Object or implicit static field access. 
597 //              if (fieldBinding.declaringClass != this.actualReceiverType
598 //                      && !this.actualReceiverType.isArrayType()       
599 //                      && fieldBinding.declaringClass != null
600 //                      && fieldBinding.constant == NotAConstant
601 //                      && ((currentScope.environment().options.targetJDK >= CompilerOptions.JDK1_2 
602 //                                      && !fieldBinding.isStatic()
603 //                                      && fieldBinding.declaringClass.id != T_Object) // no change for Object fields (if there was any)
604 //                              || !fieldBinding.declaringClass.canBeSeenBy(currentScope))){
605 //                      this.codegenBinding = currentScope.enclosingSourceType().getUpdatedFieldBinding(fieldBinding, (ReferenceBinding)this.actualReceiverType);
606 //              }
607         }
608 }
609 public TypeBinding reportError(BlockScope scope) {
610         //=====error cases=======
611         constant = Constant.NotAConstant;
612         if (binding instanceof ProblemFieldBinding) {
613                 scope.problemReporter().invalidField(this, (FieldBinding) binding);
614         } else if (binding instanceof ProblemReferenceBinding) {
615                 scope.problemReporter().invalidType(this, (TypeBinding) binding);
616         } else {
617                 scope.problemReporter().unresolvableReference(this, binding);
618         }
619         return null;
620 }
621 public TypeBinding resolveType(BlockScope scope) {
622         // for code gen, harm the restrictiveFlag       
623
624         this.actualReceiverType = this.receiverType = scope.enclosingSourceType();
625         
626         if ((this.codegenBinding = this.binding = scope.getBinding(token, bits & RestrictiveFlagMASK, this)).isValidBinding()) {
627                 switch (bits & RestrictiveFlagMASK) {
628                         case VARIABLE : // =========only variable============
629                         case VARIABLE | TYPE : //====both variable and type============
630                                 if (binding instanceof VariableBinding) {
631                                         VariableBinding variable = (VariableBinding) binding;
632                                         if (binding instanceof LocalVariableBinding) {
633                                                 bits &= ~RestrictiveFlagMASK;  // clear bits
634                                                 bits |= LOCAL;
635                                                 if ((this.bits & IsStrictlyAssignedMASK) == 0) {
636                                                         constant = variable.constant;
637                                                 } else {
638                                                         constant = NotAConstant;
639                                                 }
640                                                 if ((!variable.isFinal()) && ((bits & DepthMASK) != 0)) {
641                                                         scope.problemReporter().cannotReferToNonFinalOuterLocal((LocalVariableBinding)variable, this);
642                                                 }
643                                                 return this.resolvedType = variable.type;
644                                         }
645                                         // a field
646                                         return this.resolvedType = checkFieldAccess(scope);
647                                 }
648
649                                 // thus it was a type
650                                 bits &= ~RestrictiveFlagMASK;  // clear bits
651                                 bits |= TYPE;
652                         case TYPE : //========only type==============
653                                 constant = Constant.NotAConstant;
654                                 //deprecated test
655                                 if (isTypeUseDeprecated((TypeBinding) binding, scope))
656                                         scope.problemReporter().deprecatedType((TypeBinding) binding, this);
657                                 return this.resolvedType = (TypeBinding) binding;
658                 }
659         }
660
661         // error scenarii
662         return this.resolvedType = this.reportError(scope);
663 }
664 public String toStringExpression(){
665
666         return new String(token);}
667 public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) {
668         visitor.visit(this, scope);
669         visitor.endVisit(this, scope);
670 }
671 public String unboundReferenceErrorName(){
672
673         return new String(token);}
674 }