--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * 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-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.compiler.lookup;
+
+import org.eclipse.jdt.core.compiler.CharOperation;
+import org.eclipse.jdt.internal.compiler.ast.*;
+import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
+import org.eclipse.jdt.internal.compiler.codegen.CodeStream;
+import org.eclipse.jdt.internal.compiler.impl.Constant;
+import org.eclipse.jdt.internal.compiler.problem.ProblemReporter;
+
+public class BlockScope extends Scope {
+
+ // Local variable management
+ public LocalVariableBinding[] locals;
+ public int localIndex; // position for next variable
+ public int startIndex; // start position in this scope - for ordering scopes vs. variables
+ public int offset; // for variable allocation throughout scopes
+ public int maxOffset; // for variable allocation throughout scopes
+
+ // finally scopes must be shifted behind respective try&catch scope(s) so as to avoid
+ // collisions of secret variables (return address, save value).
+ public BlockScope[] shiftScopes;
+
+ public final static VariableBinding[] EmulationPathToImplicitThis = {};
+ public final static VariableBinding[] NoEnclosingInstanceInConstructorCall = {};
+ public final static VariableBinding[] NoEnclosingInstanceInStaticContext = {};
+
+ public Scope[] subscopes = new Scope[1]; // need access from code assist
+ public int subscopeCount = 0; // need access from code assist
+
+ // record the current case statement being processed (for entire switch case block).
+ public CaseStatement switchCase; // from 1.4 on, local types should not be accessed across switch case blocks (52221)
+
+ protected BlockScope(int kind, Scope parent) {
+
+ super(kind, parent);
+ }
+
+ public BlockScope(BlockScope parent) {
+
+ this(parent, true);
+ }
+
+ public BlockScope(BlockScope parent, boolean addToParentScope) {
+
+ this(BLOCK_SCOPE, parent);
+ locals = new LocalVariableBinding[5];
+ if (addToParentScope) parent.addSubscope(this);
+ this.startIndex = parent.localIndex;
+ }
+
+ public BlockScope(BlockScope parent, int variableCount) {
+
+ this(BLOCK_SCOPE, parent);
+ locals = new LocalVariableBinding[variableCount];
+ parent.addSubscope(this);
+ this.startIndex = parent.localIndex;
+ }
+
+ /* Create the class scope & binding for the anonymous type.
+ */
+ public final void addAnonymousType(
+ TypeDeclaration anonymousType,
+ ReferenceBinding superBinding) {
+
+ ClassScope anonymousClassScope = new ClassScope(this, anonymousType);
+ anonymousClassScope.buildAnonymousTypeBinding(
+ enclosingSourceType(),
+ superBinding);
+ }
+
+ /* Create the class scope & binding for the local type.
+ */
+ public final void addLocalType(TypeDeclaration localType) {
+
+ // check that the localType does not conflict with an enclosing type
+ ReferenceBinding type = enclosingSourceType();
+ do {
+ if (CharOperation.equals(type.sourceName, localType.name)) {
+ problemReporter().hidingEnclosingType(localType);
+ return;
+ }
+ type = type.enclosingType();
+ } while (type != null);
+
+ // check that the localType does not conflict with another sibling local type
+ Scope scope = this;
+ do {
+ if (((BlockScope) scope).findLocalType(localType.name) != null) {
+ problemReporter().duplicateNestedType(localType);
+ return;
+ }
+ } while ((scope = scope.parent) instanceof BlockScope);
+
+ ClassScope localTypeScope = new ClassScope(this, localType);
+ addSubscope(localTypeScope);
+ localTypeScope.buildLocalTypeBinding(enclosingSourceType());
+ }
+
+ /* Insert a local variable into a given scope, updating its position
+ * and checking there are not too many locals or arguments allocated.
+ */
+ public final void addLocalVariable(LocalVariableBinding binding) {
+
+ checkAndSetModifiersForVariable(binding);
+
+ // insert local in scope
+ if (localIndex == locals.length)
+ System.arraycopy(
+ locals,
+ 0,
+ (locals = new LocalVariableBinding[localIndex * 2]),
+ 0,
+ localIndex);
+ locals[localIndex++] = binding;
+
+ // update local variable binding
+ binding.declaringScope = this;
+ binding.id = this.outerMostMethodScope().analysisIndex++;
+ // share the outermost method scope analysisIndex
+ }
+
+ public void addSubscope(Scope childScope) {
+ if (subscopeCount == subscopes.length)
+ System.arraycopy(
+ subscopes,
+ 0,
+ (subscopes = new Scope[subscopeCount * 2]),
+ 0,
+ subscopeCount);
+ subscopes[subscopeCount++] = childScope;
+ }
+
+ /* Answer true if the receiver is suitable for assigning final blank fields.
+ *
+ * in other words, it is inside an initializer, a constructor or a clinit
+ */
+ public final boolean allowBlankFinalFieldAssignment(FieldBinding binding) {
+
+ if (enclosingSourceType() != binding.declaringClass)
+ return false;
+
+ MethodScope methodScope = methodScope();
+ if (methodScope.isStatic != binding.isStatic())
+ return false;
+ return methodScope.isInsideInitializer() // inside initializer
+ || ((AbstractMethodDeclaration) methodScope.referenceContext)
+ .isInitializationMethod(); // inside constructor or clinit
+ }
+ String basicToString(int tab) {
+ String newLine = "\n"; //$NON-NLS-1$
+ for (int i = tab; --i >= 0;)
+ newLine += "\t"; //$NON-NLS-1$
+
+ String s = newLine + "--- Block Scope ---"; //$NON-NLS-1$
+ newLine += "\t"; //$NON-NLS-1$
+ s += newLine + "locals:"; //$NON-NLS-1$
+ for (int i = 0; i < localIndex; i++)
+ s += newLine + "\t" + locals[i].toString(); //$NON-NLS-1$
+ s += newLine + "startIndex = " + startIndex; //$NON-NLS-1$
+ return s;
+ }
+
+ private void checkAndSetModifiersForVariable(LocalVariableBinding varBinding) {
+
+ int modifiers = varBinding.modifiers;
+ if ((modifiers & AccAlternateModifierProblem) != 0 && varBinding.declaration != null){
+ problemReporter().duplicateModifierForVariable(varBinding.declaration, this instanceof MethodScope);
+ }
+ int realModifiers = modifiers & AccJustFlag;
+
+ int unexpectedModifiers = ~AccFinal;
+ if ((realModifiers & unexpectedModifiers) != 0 && varBinding.declaration != null){
+ problemReporter().illegalModifierForVariable(varBinding.declaration, this instanceof MethodScope);
+ }
+ varBinding.modifiers = modifiers;
+ }
+
+ /* Compute variable positions in scopes given an initial position offset
+ * ignoring unused local variables.
+ *
+ * No argument is expected here (ilocal is the first non-argument local of the outermost scope)
+ * Arguments are managed by the MethodScope method
+ */
+ void computeLocalVariablePositions(int ilocal, int initOffset, CodeStream codeStream) {
+
+ this.offset = initOffset;
+ this.maxOffset = initOffset;
+
+ // local variable init
+ int maxLocals = this.localIndex;
+ boolean hasMoreVariables = ilocal < maxLocals;
+
+ // scope init
+ int iscope = 0, maxScopes = this.subscopeCount;
+ boolean hasMoreScopes = maxScopes > 0;
+
+ // iterate scopes and variables in parallel
+ while (hasMoreVariables || hasMoreScopes) {
+ if (hasMoreScopes
+ && (!hasMoreVariables || (subscopes[iscope].startIndex() <= ilocal))) {
+ // consider subscope first
+ if (subscopes[iscope] instanceof BlockScope) {
+ BlockScope subscope = (BlockScope) subscopes[iscope];
+ int subOffset = subscope.shiftScopes == null ? this.offset : subscope.maxShiftedOffset();
+ subscope.computeLocalVariablePositions(0, subOffset, codeStream);
+ if (subscope.maxOffset > this.maxOffset)
+ this.maxOffset = subscope.maxOffset;
+ }
+ hasMoreScopes = ++iscope < maxScopes;
+ } else {
+
+ // consider variable first
+ LocalVariableBinding local = locals[ilocal]; // if no local at all, will be locals[ilocal]==null
+
+ // check if variable is actually used, and may force it to be preserved
+ boolean generateCurrentLocalVar = (local.useFlag == LocalVariableBinding.USED && (local.constant == Constant.NotAConstant));
+
+ // do not report fake used variable
+ if (local.useFlag == LocalVariableBinding.UNUSED
+ && (local.declaration != null) // unused (and non secret) local
+ && ((local.declaration.bits & ASTNode.IsLocalDeclarationReachableMASK) != 0)) { // declaration is reachable
+
+ if (!(local.declaration instanceof Argument)) // do not report unused catch arguments
+ this.problemReporter().unusedLocalVariable(local.declaration);
+ }
+
+ // could be optimized out, but does need to preserve unread variables ?
+ if (!generateCurrentLocalVar) {
+ if (local.declaration != null && environment().options.preserveAllLocalVariables) {
+ generateCurrentLocalVar = true; // force it to be preserved in the generated code
+ local.useFlag = LocalVariableBinding.USED;
+ }
+ }
+
+ // allocate variable
+ if (generateCurrentLocalVar) {
+
+ if (local.declaration != null) {
+ codeStream.record(local); // record user-defined local variables for attribute generation
+ }
+ // assign variable position
+ local.resolvedPosition = this.offset;
+
+ if ((local.type == LongBinding) || (local.type == DoubleBinding)) {
+ this.offset += 2;
+ } else {
+ this.offset++;
+ }
+ if (this.offset > 0xFFFF) { // no more than 65535 words of locals
+ this.problemReporter().noMoreAvailableSpaceForLocal(
+ local,
+ local.declaration == null ? (ASTNode)this.methodScope().referenceContext : local.declaration);
+ }
+ } else {
+ local.resolvedPosition = -1; // not generated
+ }
+ hasMoreVariables = ++ilocal < maxLocals;
+ }
+ }
+ if (this.offset > this.maxOffset)
+ this.maxOffset = this.offset;
+ }
+
+ /*
+ * Record the suitable binding denoting a synthetic field or constructor argument,
+ * mapping to the actual outer local variable in the scope context.
+ * Note that this may not need any effect, in case the outer local variable does not
+ * need to be emulated and can directly be used as is (using its back pointer to its
+ * declaring scope).
+ */
+ public void emulateOuterAccess(LocalVariableBinding outerLocalVariable) {
+
+ MethodScope currentMethodScope;
+ if ((currentMethodScope = this.methodScope())
+ != outerLocalVariable.declaringScope.methodScope()) {
+ NestedTypeBinding currentType = (NestedTypeBinding) this.enclosingSourceType();
+
+ //do nothing for member types, pre emulation was performed already
+ if (!currentType.isLocalType()) {
+ return;
+ }
+ // must also add a synthetic field if we're not inside a constructor
+ if (!currentMethodScope.isInsideInitializerOrConstructor()) {
+ currentType.addSyntheticArgumentAndField(outerLocalVariable);
+ } else {
+ currentType.addSyntheticArgument(outerLocalVariable);
+ }
+ }
+ }
+
+ /* Note that it must never produce a direct access to the targetEnclosingType,
+ * but instead a field sequence (this$2.this$1.this$0) so as to handle such a test case:
+ *
+ * class XX {
+ * void foo() {
+ * class A {
+ * class B {
+ * class C {
+ * boolean foo() {
+ * return (Object) A.this == (Object) B.this;
+ * }
+ * }
+ * }
+ * }
+ * new A().new B().new C();
+ * }
+ * }
+ * where we only want to deal with ONE enclosing instance for C (could not figure out an A for C)
+ */
+ public final ReferenceBinding findLocalType(char[] name) {
+
+ long compliance = environment().options.complianceLevel;
+ for (int i = 0, length = subscopeCount; i < length; i++) {
+ if (subscopes[i] instanceof ClassScope) {
+ LocalTypeBinding sourceType = (LocalTypeBinding)((ClassScope) subscopes[i]).referenceContext.binding;
+ // from 1.4 on, local types should not be accessed across switch case blocks (52221)
+ if (compliance >= ClassFileConstants.JDK1_4 && sourceType.switchCase != this.switchCase) continue;
+ if (CharOperation.equals(sourceType.sourceName(), name))
+ return sourceType;
+ }
+ }
+ return null;
+ }
+
+ public LocalVariableBinding findVariable(char[] variable) {
+
+ int varLength = variable.length;
+ for (int i = 0, length = locals.length; i < length; i++) {
+ LocalVariableBinding local = locals[i];
+ if (local == null)
+ return null;
+ if (local.name.length == varLength && CharOperation.equals(local.name, variable))
+ return local;
+ }
+ return null;
+ }
+ /* API
+ * flag is a mask of the following values VARIABLE (= FIELD or LOCAL), TYPE.
+ * Only bindings corresponding to the mask will be answered.
+ *
+ * if the VARIABLE mask is set then
+ * If the first name provided is a field (or local) then the field (or local) is answered
+ * Otherwise, package names and type names are consumed until a field is found.
+ * In this case, the field is answered.
+ *
+ * if the TYPE mask is set,
+ * package names and type names are consumed until the end of the input.
+ * Only if all of the input is consumed is the type answered
+ *
+ * All other conditions are errors, and a problem binding is returned.
+ *
+ * NOTE: If a problem binding is returned, senders should extract the compound name
+ * from the binding & not assume the problem applies to the entire compoundName.
+ *
+ * The VARIABLE mask has precedence over the TYPE mask.
+ *
+ * InvocationSite implements
+ * isSuperAccess(); this is used to determine if the discovered field is visible.
+ * setFieldIndex(int); this is used to record the number of names that were consumed.
+ *
+ * For example, getBinding({"foo","y","q", VARIABLE, site) will answer
+ * the binding for the field or local named "foo" (or an error binding if none exists).
+ * In addition, setFieldIndex(1) will be sent to the invocation site.
+ * If a type named "foo" exists, it will not be detected (and an error binding will be answered)
+ *
+ * IMPORTANT NOTE: This method is written under the assumption that compoundName is longer than length 1.
+ */
+ public Binding getBinding(char[][] compoundName, int mask, InvocationSite invocationSite, boolean needResolve) {
+
+ Binding binding = getBinding(compoundName[0], mask | TYPE | PACKAGE, invocationSite, needResolve);
+ invocationSite.setFieldIndex(1);
+ if (binding instanceof VariableBinding) return binding;
+ compilationUnitScope().recordSimpleReference(compoundName[0]);
+ if (!binding.isValidBinding()) return binding;
+
+ int length = compoundName.length;
+ int currentIndex = 1;
+ foundType : if (binding instanceof PackageBinding) {
+ PackageBinding packageBinding = (PackageBinding) binding;
+ while (currentIndex < length) {
+ compilationUnitScope().recordReference(packageBinding.compoundName, compoundName[currentIndex]);
+ binding = packageBinding.getTypeOrPackage(compoundName[currentIndex++]);
+ invocationSite.setFieldIndex(currentIndex);
+ if (binding == null) {
+ if (currentIndex == length) {
+ // must be a type if its the last name, otherwise we have no idea if its a package or type
+ return new ProblemReferenceBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ NotFound);
+ }
+ return new ProblemBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ NotFound);
+ }
+ if (binding instanceof ReferenceBinding) {
+ if (!binding.isValidBinding())
+ return new ProblemReferenceBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ binding.problemId());
+ if (!((ReferenceBinding) binding).canBeSeenBy(this))
+ return new ProblemReferenceBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ (ReferenceBinding) binding,
+ NotVisible);
+ break foundType;
+ }
+ packageBinding = (PackageBinding) binding;
+ }
+
+ // It is illegal to request a PACKAGE from this method.
+ return new ProblemReferenceBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ NotFound);
+ }
+
+ // know binding is now a ReferenceBinding
+ while (currentIndex < length) {
+ ReferenceBinding typeBinding = (ReferenceBinding) binding;
+ char[] nextName = compoundName[currentIndex++];
+ invocationSite.setFieldIndex(currentIndex);
+ invocationSite.setActualReceiverType(typeBinding);
+ if ((mask & FIELD) != 0 && (binding = findField(typeBinding, nextName, invocationSite, true /*resolve*/)) != null) {
+ if (!binding.isValidBinding())
+ return new ProblemFieldBinding(
+ ((FieldBinding) binding).declaringClass,
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ binding.problemId());
+ break; // binding is now a field
+ }
+ if ((binding = findMemberType(nextName, typeBinding)) == null) {
+ if ((mask & FIELD) != 0) {
+ return new ProblemBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ typeBinding,
+ NotFound);
+ }
+ return new ProblemReferenceBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ typeBinding,
+ NotFound);
+ }
+ if (!binding.isValidBinding())
+ return new ProblemReferenceBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ binding.problemId());
+ }
+ if ((mask & FIELD) != 0 && (binding instanceof FieldBinding)) {
+ // was looking for a field and found a field
+ FieldBinding field = (FieldBinding) binding;
+ if (!field.isStatic())
+ return new ProblemFieldBinding(
+ field.declaringClass,
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ NonStaticReferenceInStaticContext);
+ return binding;
+ }
+ if ((mask & TYPE) != 0 && (binding instanceof ReferenceBinding)) {
+ // was looking for a type and found a type
+ return binding;
+ }
+
+ // handle the case when a field or type was asked for but we resolved the compoundName to a type or field
+ return new ProblemBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ NotFound);
+ }
+
+ // Added for code assist... NOT Public API
+ public final Binding getBinding(
+ char[][] compoundName,
+ InvocationSite invocationSite) {
+ int currentIndex = 0;
+ int length = compoundName.length;
+ Binding binding =
+ getBinding(
+ compoundName[currentIndex++],
+ VARIABLE | TYPE | PACKAGE,
+ invocationSite,
+ true /*resolve*/);
+ if (!binding.isValidBinding())
+ return binding;
+
+ foundType : if (binding instanceof PackageBinding) {
+ while (currentIndex < length) {
+ PackageBinding packageBinding = (PackageBinding) binding;
+ binding = packageBinding.getTypeOrPackage(compoundName[currentIndex++]);
+ if (binding == null) {
+ if (currentIndex == length) {
+ // must be a type if its the last name, otherwise we have no idea if its a package or type
+ return new ProblemReferenceBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ NotFound);
+ }
+ return new ProblemBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ NotFound);
+ }
+ if (binding instanceof ReferenceBinding) {
+ if (!binding.isValidBinding())
+ return new ProblemReferenceBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ binding.problemId());
+ if (!((ReferenceBinding) binding).canBeSeenBy(this))
+ return new ProblemReferenceBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ (ReferenceBinding) binding,
+ NotVisible);
+ break foundType;
+ }
+ }
+ return binding;
+ }
+
+ foundField : if (binding instanceof ReferenceBinding) {
+ while (currentIndex < length) {
+ ReferenceBinding typeBinding = (ReferenceBinding) binding;
+ char[] nextName = compoundName[currentIndex++];
+ if ((binding = findField(typeBinding, nextName, invocationSite, true /*resolve*/)) != null) {
+ if (!binding.isValidBinding())
+ return new ProblemFieldBinding(
+ ((FieldBinding) binding).declaringClass,
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ binding.problemId());
+ if (!((FieldBinding) binding).isStatic())
+ return new ProblemFieldBinding(
+ ((FieldBinding) binding).declaringClass,
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ NonStaticReferenceInStaticContext);
+ break foundField; // binding is now a field
+ }
+ if ((binding = findMemberType(nextName, typeBinding)) == null)
+ return new ProblemBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ typeBinding,
+ NotFound);
+ if (!binding.isValidBinding())
+ return new ProblemReferenceBinding(
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ binding.problemId());
+ }
+ return binding;
+ }
+
+ VariableBinding variableBinding = (VariableBinding) binding;
+ while (currentIndex < length) {
+ TypeBinding typeBinding = variableBinding.type;
+ if (typeBinding == null)
+ return new ProblemFieldBinding(
+ null,
+ CharOperation.subarray(compoundName, 0, currentIndex + 1),
+ NotFound);
+ variableBinding =
+ findField(typeBinding, compoundName[currentIndex++], invocationSite, true /*resolve*/);
+ if (variableBinding == null)
+ return new ProblemFieldBinding(
+ null,
+ CharOperation.subarray(compoundName, 0, currentIndex),
+ NotFound);
+ if (!variableBinding.isValidBinding())
+ return variableBinding;
+ }
+ return variableBinding;
+ }
+
+ /*
+ * This retrieves the argument that maps to an enclosing instance of the suitable type,
+ * if not found then answers nil -- do not create one
+ *
+ * #implicitThis : the implicit this will be ok
+ * #((arg) this$n) : available as a constructor arg
+ * #((arg) this$n ... this$p) : available as as a constructor arg + a sequence of fields
+ * #((fieldDescr) this$n ... this$p) : available as a sequence of fields
+ * nil : not found
+ *
+ * Note that this algorithm should answer the shortest possible sequence when
+ * shortcuts are available:
+ * this$0 . this$0 . this$0
+ * instead of
+ * this$2 . this$1 . this$0 . this$1 . this$0
+ * thus the code generation will be more compact and runtime faster
+ */
+ public VariableBinding[] getEmulationPath(LocalVariableBinding outerLocalVariable) {
+
+ MethodScope currentMethodScope = this.methodScope();
+ SourceTypeBinding sourceType = currentMethodScope.enclosingSourceType();
+
+ // identity check
+ if (currentMethodScope == outerLocalVariable.declaringScope.methodScope()) {
+ return new VariableBinding[] { outerLocalVariable };
+ // implicit this is good enough
+ }
+ // use synthetic constructor arguments if possible
+ if (currentMethodScope.isInsideInitializerOrConstructor()
+ && (sourceType.isNestedType())) {
+ SyntheticArgumentBinding syntheticArg;
+ if ((syntheticArg = ((NestedTypeBinding) sourceType).getSyntheticArgument(outerLocalVariable)) != null) {
+ return new VariableBinding[] { syntheticArg };
+ }
+ }
+ // use a synthetic field then
+ if (!currentMethodScope.isStatic) {
+ FieldBinding syntheticField;
+ if ((syntheticField = sourceType.getSyntheticField(outerLocalVariable)) != null) {
+ return new VariableBinding[] { syntheticField };
+ }
+ }
+ return null;
+ }
+
+ /*
+ * This retrieves the argument that maps to an enclosing instance of the suitable type,
+ * if not found then answers nil -- do not create one
+ *
+ * #implicitThis : the implicit this will be ok
+ * #((arg) this$n) : available as a constructor arg
+ * #((arg) this$n access$m... access$p) : available as as a constructor arg + a sequence of synthetic accessors to synthetic fields
+ * #((fieldDescr) this$n access#m... access$p) : available as a first synthetic field + a sequence of synthetic accessors to synthetic fields
+ * null : not found
+ * jls 15.9.2 + http://www.ergnosis.com/java-spec-report/java-language/jls-8.8.5.1-d.html
+ */
+ public Object[] getEmulationPath(
+ ReferenceBinding targetEnclosingType,
+ boolean onlyExactMatch,
+ boolean ignoreEnclosingArgInConstructorCall) {
+
+ MethodScope currentMethodScope = this.methodScope();
+ SourceTypeBinding sourceType = currentMethodScope.enclosingSourceType();
+
+ // use 'this' if possible
+ if (!currentMethodScope.isConstructorCall && !currentMethodScope.isStatic) {
+ if (sourceType == targetEnclosingType || (!onlyExactMatch && targetEnclosingType.isSuperclassOf(sourceType))) {
+ return EmulationPathToImplicitThis; // implicit this is good enough
+ }
+ }
+ if (!sourceType.isNestedType() || sourceType.isStatic()) { // no emulation from within non-inner types
+ if (currentMethodScope.isConstructorCall) {
+ return NoEnclosingInstanceInConstructorCall;
+ } else if (currentMethodScope.isStatic){
+ return NoEnclosingInstanceInStaticContext;
+ }
+ return null;
+ }
+ boolean insideConstructor = currentMethodScope.isInsideInitializerOrConstructor();
+ // use synthetic constructor arguments if possible
+ if (insideConstructor) {
+ SyntheticArgumentBinding syntheticArg;
+ if ((syntheticArg = ((NestedTypeBinding) sourceType).getSyntheticArgument(targetEnclosingType, onlyExactMatch)) != null) {
+ // reject allocation and super constructor call
+ if (ignoreEnclosingArgInConstructorCall
+ && currentMethodScope.isConstructorCall
+ && (sourceType == targetEnclosingType || (!onlyExactMatch && targetEnclosingType.isSuperclassOf(sourceType)))) {
+ return NoEnclosingInstanceInConstructorCall;
+ }
+ return new Object[] { syntheticArg };
+ }
+ }
+
+ // use a direct synthetic field then
+ if (currentMethodScope.isStatic) {
+ return NoEnclosingInstanceInStaticContext;
+ }
+ FieldBinding syntheticField = sourceType.getSyntheticField(targetEnclosingType, onlyExactMatch);
+ if (syntheticField != null) {
+ if (currentMethodScope.isConstructorCall){
+ return NoEnclosingInstanceInConstructorCall;
+ }
+ return new Object[] { syntheticField };
+ }
+ // could be reached through a sequence of enclosing instance link (nested members)
+ Object[] path = new Object[2]; // probably at least 2 of them
+ ReferenceBinding currentType = sourceType.enclosingType();
+ if (insideConstructor) {
+ path[0] = ((NestedTypeBinding) sourceType).getSyntheticArgument(currentType, onlyExactMatch);
+ } else {
+ if (currentMethodScope.isConstructorCall){
+ return NoEnclosingInstanceInConstructorCall;
+ }
+ path[0] = sourceType.getSyntheticField(currentType, onlyExactMatch);
+ }
+ if (path[0] != null) { // keep accumulating
+
+ int count = 1;
+ ReferenceBinding currentEnclosingType;
+ while ((currentEnclosingType = currentType.enclosingType()) != null) {
+
+ //done?
+ if (currentType == targetEnclosingType
+ || (!onlyExactMatch && targetEnclosingType.isSuperclassOf(currentType))) break;
+
+ if (currentMethodScope != null) {
+ currentMethodScope = currentMethodScope.enclosingMethodScope();
+ if (currentMethodScope != null && currentMethodScope.isConstructorCall){
+ return NoEnclosingInstanceInConstructorCall;
+ }
+ if (currentMethodScope != null && currentMethodScope.isStatic){
+ return NoEnclosingInstanceInStaticContext;
+ }
+ }
+
+ syntheticField = ((NestedTypeBinding) currentType).getSyntheticField(currentEnclosingType, onlyExactMatch);
+ if (syntheticField == null) break;
+
+ // append inside the path
+ if (count == path.length) {
+ System.arraycopy(path, 0, (path = new Object[count + 1]), 0, count);
+ }
+ // private access emulation is necessary since synthetic field is private
+ path[count++] = ((SourceTypeBinding) syntheticField.declaringClass).addSyntheticMethod(syntheticField, true);
+ currentType = currentEnclosingType;
+ }
+ if (currentType == targetEnclosingType
+ || (!onlyExactMatch && targetEnclosingType.isSuperclassOf(currentType))) {
+ return path;
+ }
+ }
+ return null;
+ }
+
+ /* Answer true if the variable name already exists within the receiver's scope.
+ */
+ public final boolean isDuplicateLocalVariable(char[] name) {
+ BlockScope current = this;
+ while (true) {
+ for (int i = 0; i < localIndex; i++) {
+ if (CharOperation.equals(name, current.locals[i].name))
+ return true;
+ }
+ if (current.kind != BLOCK_SCOPE) return false;
+ current = (BlockScope)current.parent;
+ }
+ }
+
+ public int maxShiftedOffset() {
+ int max = -1;
+ if (this.shiftScopes != null){
+ for (int i = 0, length = this.shiftScopes.length; i < length; i++){
+ int subMaxOffset = this.shiftScopes[i].maxOffset;
+ if (subMaxOffset > max) max = subMaxOffset;
+ }
+ }
+ return max;
+ }
+
+ /* Answer the problem reporter to use for raising new problems.
+ *
+ * Note that as a side-effect, this updates the current reference context
+ * (unit, type or method) in case the problem handler decides it is necessary
+ * to abort.
+ */
+ public ProblemReporter problemReporter() {
+
+ return outerMostMethodScope().problemReporter();
+ }
+
+ /*
+ * Code responsible to request some more emulation work inside the invocation type, so as to supply
+ * correct synthetic arguments to any allocation of the target type.
+ */
+ public void propagateInnerEmulation(ReferenceBinding targetType, boolean isEnclosingInstanceSupplied) {
+
+ // no need to propagate enclosing instances, they got eagerly allocated already.
+
+ SyntheticArgumentBinding[] syntheticArguments;
+ if ((syntheticArguments = targetType.syntheticOuterLocalVariables()) != null) {
+ for (int i = 0, max = syntheticArguments.length; i < max; i++) {
+ SyntheticArgumentBinding syntheticArg = syntheticArguments[i];
+ // need to filter out the one that could match a supplied enclosing instance
+ if (!(isEnclosingInstanceSupplied
+ && (syntheticArg.type == targetType.enclosingType()))) {
+ this.emulateOuterAccess(syntheticArg.actualOuterLocalVariable);
+ }
+ }
+ }
+ }
+
+ /* Answer the reference type of this scope.
+ *
+ * It is the nearest enclosing type of this scope.
+ */
+ public TypeDeclaration referenceType() {
+
+ return methodScope().referenceType();
+ }
+
+ /*
+ * Answer the index of this scope relatively to its parent.
+ * For method scope, answers -1 (not a classScope relative position)
+ */
+ public int scopeIndex() {
+ if (this instanceof MethodScope) return -1;
+ BlockScope parentScope = (BlockScope)parent;
+ Scope[] parentSubscopes = parentScope.subscopes;
+ for (int i = 0, max = parentScope.subscopeCount; i < max; i++) {
+ if (parentSubscopes[i] == this) return i;
+ }
+ return -1;
+ }
+
+ // start position in this scope - for ordering scopes vs. variables
+ int startIndex() {
+ return startIndex;
+ }
+
+ public String toString() {
+ return toString(0);
+ }
+
+ public String toString(int tab) {
+
+ String s = basicToString(tab);
+ for (int i = 0; i < subscopeCount; i++)
+ if (subscopes[i] instanceof BlockScope)
+ s += ((BlockScope) subscopes[i]).toString(tab + 1) + "\n"; //$NON-NLS-1$
+ return s;
+ }
+}
projects / org.ibex.tool.git / blobdiff