Attachment 2954 Details for Bug 29366 – BlockScope.java

BlockScope.java

BlockScope.java (text/plain), 54.78 KB, created by Philipe Mulet

on 2003-01-13 05:18:54 EST

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Creator: Philipe Mulet

Created: 2003-01-13 05:18:54 EST

Size: 54.78 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
> * All rights reserved. This program and the accompanying materials 
> * are made available under the terms of the Common Public License v0.5 
> * which accompanies this distribution, and is available at
> * http://www.eclipse.org/legal/cpl-v05.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.AbstractMethodDeclaration;
>import org.eclipse.jdt.internal.compiler.ast.Argument;
>import org.eclipse.jdt.internal.compiler.ast.AstNode;
>import org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration;
>import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
>import org.eclipse.jdt.internal.compiler.codegen.CodeStream;
>import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
>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[] EmulationPathToImplicitThisInConstructorCall = {};
>
>	public Scope[] subscopes = new Scope[1]; // need access from code assist
>	public int scopeIndex = 0; // need access from code assist
>
>	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);
>		localTypeScope.buildLocalTypeBinding(enclosingSourceType());
>		addSubscope(localTypeScope);
>	}
>
>	/* 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 (scopeIndex == subscopes.length)
>			System.arraycopy(
>				subscopes,
>				0,
>				(subscopes = new Scope[scopeIndex * 2]),
>				0,
>				scopeIndex);
>		subscopes[scopeIndex++] = childScope;
>	}
>
>	/* Answer true if the receiver is suitable for assigning final blank fields.
>	 *
>	 * i.e. 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.scopeIndex;
>		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;
>	}
>
>	/* Answer true if the variable name already exists within the receiver's scope.
>	 */
>	public final LocalVariableBinding duplicateName(char[] name) {
>		for (int i = 0; i < localIndex; i++)
>			if (CharOperation.equals(name, locals[i].name))
>				return locals[i];
>
>		if (this instanceof MethodScope)
>			return null;
>		else
>			return ((BlockScope) parent).duplicateName(name);
>	}
>
>	/*
>	 *	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);
>			}
>		}
>	}
>
>	/*
>	 * Record the suitable binding denoting a synthetic field or constructor argument,
>	 * mapping to a given actual enclosing instance type in the scope context.
>	 * Skip it if the enclosingType is actually the current scope's enclosing type.
>	 */
>
>	public void emulateOuterAccess(
>		ReferenceBinding targetEnclosingType,
>		boolean useDirectReference,
>		AstNode reference) {
>
>		ReferenceBinding currentType = enclosingSourceType();
>		if (currentType.isNestedType() && currentType != targetEnclosingType){
>
>			if (useDirectReference) {
>				// the target enclosing type is not in scope, we directly refer it
>				// must also add a synthetic field if we're not inside a constructor
>				NestedTypeBinding currentNestedType = (NestedTypeBinding) currentType;
>				if (methodScope().isInsideInitializerOrConstructor())
>					currentNestedType.addSyntheticArgument(targetEnclosingType);
>				else
>					currentNestedType.addSyntheticArgumentAndField(targetEnclosingType);
>					
>			} else { // indirect reference sequence
>				int depth = 0;
>				
>				// saturate all the way up until reaching compatible enclosing type
>				while (currentType.isLocalType()){
>					NestedTypeBinding currentNestedType = (NestedTypeBinding) currentType;
>					currentType = currentNestedType.enclosingType;
>					
>					if (depth == 0){
>						if (methodScope().isInsideInitializerOrConstructor()) {
>							// must also add a synthetic field if we're not inside a constructor
>							currentNestedType.addSyntheticArgument(currentType);
>						} else {
>							currentNestedType.addSyntheticArgumentAndField(currentType);
>						}					
>					} else if (currentNestedType == targetEnclosingType) {
>							break;
>					} else {
>						currentNestedType.addSyntheticArgumentAndField(currentType);
>					}
>					depth++;
>				}
>			}
>		}
>	}
>
>	/* 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) {
>
>		for (int i = 0, length = scopeIndex; i < length; i++) {
>			if (subscopes[i] instanceof ClassScope) {
>				SourceTypeBinding sourceType =
>					((ClassScope) subscopes[i]).referenceContext.binding;
>				if (CharOperation.equals(sourceType.sourceName(), name))
>					return sourceType;
>			}
>		}
>		return null;
>	}
>
>	public LocalVariableBinding findVariable(char[] variable) {
>
>		int variableLength = 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 == variableLength
>				&& CharOperation.prefixEquals(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) {
>
>		Binding binding = getBinding(compoundName[0], mask | TYPE | PACKAGE, invocationSite);
>		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);
>					else
>						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),
>							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 ((binding = findField(typeBinding, nextName, invocationSite)) != 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)
>				return new ProblemBinding(
>					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);
>		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);
>					else
>						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),
>							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)) != 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);
>			if (variableBinding == null)
>				return new ProblemFieldBinding(
>					null,
>					CharOperation.subarray(compoundName, 0, currentIndex),
>					NotFound);
>			if (!variableBinding.isValidBinding())
>				return variableBinding;
>		}
>		return variableBinding;
>	}
>
>	/* API
>     *	
>	 *	Answer the binding that corresponds to the argument name.
>	 *	flag is a mask of the following values VARIABLE (= FIELD or LOCAL), TYPE, PACKAGE.
>	 *	Only bindings corresponding to the mask can be answered.
>	 *
>	 *	For example, getBinding("foo", VARIABLE, site) will answer
>	 *	the binding for the field or local named "foo" (or an error binding if none exists).
>	 *	If a type named "foo" exists, it will not be detected (and an error binding will be answered)
>	 *
>	 *	The VARIABLE mask has precedence over the TYPE mask.
>	 *
>	 *	If the VARIABLE mask is not set, neither fields nor locals will be looked for.
>	 *
>	 *	InvocationSite implements:
>	 *		isSuperAccess(); this is used to determine if the discovered field is visible.
>	 *
>	 *	Limitations: cannot request FIELD independently of LOCAL, or vice versa
>	 */
>	public Binding getBinding(char[] name, int mask, InvocationSite invocationSite) {
>			
>		Binding binding = null;
>		FieldBinding problemField = null;
>		if ((mask & VARIABLE) != 0) {
>			if (this.kind == BLOCK_SCOPE || this.kind == METHOD_SCOPE) {
>				LocalVariableBinding variableBinding = findVariable(name);
>				// looks in this scope only
>				if (variableBinding != null) return variableBinding;
>			}
>
>			boolean insideStaticContext = false;
>			boolean insideConstructorCall = false;
>			if (this.kind == METHOD_SCOPE) {
>				MethodScope methodScope = (MethodScope) this;
>				insideStaticContext |= methodScope.isStatic;
>				insideConstructorCall |= methodScope.isConstructorCall;
>			}
>
>			FieldBinding foundField = null;
>			// can be a problem field which is answered if a valid field is not found
>			ProblemFieldBinding foundInsideProblem = null;
>			// inside Constructor call or inside static context
>			Scope scope = parent;
>			int depth = 0;
>			int foundDepth = 0;
>			ReferenceBinding foundActualReceiverType = null;
>			done : while (true) { // done when a COMPILATION_UNIT_SCOPE is found
>				switch (scope.kind) {
>					case METHOD_SCOPE :
>						MethodScope methodScope = (MethodScope) scope;
>						insideStaticContext |= methodScope.isStatic;
>						insideConstructorCall |= methodScope.isConstructorCall;
>						// Fall through... could duplicate the code below to save a cast - questionable optimization
>					case BLOCK_SCOPE :
>						LocalVariableBinding variableBinding = ((BlockScope) scope).findVariable(name);
>						// looks in this scope only
>						if (variableBinding != null) {
>							if (foundField != null && foundField.isValidBinding())
>								return new ProblemFieldBinding(
>									foundField.declaringClass,
>									name,
>									InheritedNameHidesEnclosingName);
>							if (depth > 0)
>								invocationSite.setDepth(depth);
>							return variableBinding;
>						}
>						break;
>					case CLASS_SCOPE :
>						ClassScope classScope = (ClassScope) scope;
>						SourceTypeBinding enclosingType = classScope.referenceContext.binding;
>						FieldBinding fieldBinding =
>							classScope.findField(enclosingType, name, invocationSite);
>						// Use next line instead if willing to enable protected access accross inner types
>						// FieldBinding fieldBinding = findField(enclosingType, name, invocationSite);
>						if (fieldBinding != null) { // skip it if we did not find anything
>							if (fieldBinding.problemId() == Ambiguous) {
>								if (foundField == null || foundField.problemId() == NotVisible)
>									// supercedes any potential InheritedNameHidesEnclosingName problem
>									return fieldBinding;
>								else
>									// make the user qualify the field, likely wants the first inherited field (javac generates an ambiguous error instead)
>									return new ProblemFieldBinding(
>										fieldBinding.declaringClass,
>										name,
>										InheritedNameHidesEnclosingName);
>							}
>
>							ProblemFieldBinding insideProblem = null;
>							if (fieldBinding.isValidBinding()) {
>								if (!fieldBinding.isStatic()) {
>									if (insideConstructorCall) {
>										insideProblem =
>											new ProblemFieldBinding(
>												fieldBinding.declaringClass,
>												name,
>												NonStaticReferenceInConstructorInvocation);
>									} else if (insideStaticContext) {
>										insideProblem =
>											new ProblemFieldBinding(
>												fieldBinding.declaringClass,
>												name,
>												NonStaticReferenceInStaticContext);
>									}
>								}
>								if (enclosingType == fieldBinding.declaringClass
>									|| environment().options.complianceLevel >= CompilerOptions.JDK1_4){
>									// found a valid field in the 'immediate' scope (ie. not inherited)
>									// OR in 1.4 mode (inherited shadows enclosing)
>									if (foundField == null) {
>										if (depth > 0){
>											invocationSite.setDepth(depth);
>											invocationSite.setActualReceiverType(enclosingType);
>										}
>										// return the fieldBinding if it is not declared in a superclass of the scope's binding (i.e. "inherited")
>										return insideProblem == null ? fieldBinding : insideProblem;
>									}
>									if (foundField.isValidBinding())
>										// if a valid field was found, complain when another is found in an 'immediate' enclosing type (ie. not inherited)
>										if (foundField.declaringClass != fieldBinding.declaringClass)
>											// ie. have we found the same field - do not trust field identity yet
>											return new ProblemFieldBinding(
>												fieldBinding.declaringClass,
>												name,
>												InheritedNameHidesEnclosingName);
>								}
>							}
>
>							if (foundField == null
>								|| (foundField.problemId() == NotVisible
>									&& fieldBinding.problemId() != NotVisible)) {
>								// only remember the fieldBinding if its the first one found or the previous one was not visible & fieldBinding is...
>								foundDepth = depth;
>								foundActualReceiverType = enclosingType;
>								foundInsideProblem = insideProblem;
>								foundField = fieldBinding;
>							}
>						}
>						depth++;
>						insideStaticContext |= enclosingType.isStatic();
>						// 1EX5I8Z - accessing outer fields within a constructor call is permitted
>						// in order to do so, we change the flag as we exit from the type, not the method
>						// itself, because the class scope is used to retrieve the fields.
>						MethodScope enclosingMethodScope = scope.methodScope();
>						insideConstructorCall =
>							enclosingMethodScope == null ? false : enclosingMethodScope.isConstructorCall;
>						break;
>					case COMPILATION_UNIT_SCOPE :
>						break done;
>				}
>				scope = scope.parent;
>			}
>
>			if (foundInsideProblem != null){
>				return foundInsideProblem;
>			}
>			if (foundField != null) {
>				if (foundField.isValidBinding()){
>					if (foundDepth > 0){
>						invocationSite.setDepth(foundDepth);
>						invocationSite.setActualReceiverType(foundActualReceiverType);
>					}
>					return foundField;
>				}
>				problemField = foundField;
>			}
>		}
>
>		// We did not find a local or instance variable.
>		if ((mask & TYPE) != 0) {
>			if ((binding = getBaseType(name)) != null)
>				return binding;
>			binding = getTypeOrPackage(name, (mask & PACKAGE) == 0 ? TYPE : TYPE | PACKAGE);
>			if (binding.isValidBinding() || mask == TYPE)
>				return binding;
>			// answer the problem type binding if we are only looking for a type
>		} else if ((mask & PACKAGE) != 0) {
>			compilationUnitScope().recordSimpleReference(name);
>			if ((binding = environment().getTopLevelPackage(name)) != null)
>				return binding;
>		}
>		if (problemField != null)
>			return problemField;
>		else
>			return new ProblemBinding(name, enclosingSourceType(), NotFound);
>	}
>	
>	/*
>	 * 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
>	 * 		nil 		 														: not found
>	 *
>	 */
>	public Object[] getCompatibleEmulationPath(ReferenceBinding targetEnclosingType) {
>
>		MethodScope currentMethodScope = this.methodScope();
>		SourceTypeBinding sourceType = currentMethodScope.enclosingSourceType();
>
>		// identity check
>		if (!currentMethodScope.isStatic 
>			&& (sourceType == targetEnclosingType
>				|| targetEnclosingType.isSuperclassOf(sourceType))) {
>			return EmulationPathToImplicitThis; // implicit this is good enough
>		}
>		if (!sourceType.isNestedType()
>			|| sourceType.isStatic()) { // no emulation from within non-inner types
>			return null;
>		}
>		boolean insideConstructor =
>			currentMethodScope.isInsideInitializerOrConstructor();
>		// use synthetic constructor arguments if possible
>		if (insideConstructor) {
>			SyntheticArgumentBinding syntheticArg;
>			if ((syntheticArg = ((NestedTypeBinding) sourceType).getSyntheticArgument(targetEnclosingType, this, false)) != null) {
>				return new Object[] { syntheticArg };
>			}
>		}
>
>		// use a direct synthetic field then
>		if (!currentMethodScope.isStatic) {
>			FieldBinding syntheticField;
>			if ((syntheticField = sourceType.getSyntheticField(targetEnclosingType, this, false)) != null) {
>				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((SourceTypeBinding) currentType, this, false);
>			} else {
>				path[0] =
>					sourceType.getSyntheticField((SourceTypeBinding) currentType, this, false);
>			}
>			if (path[0] != null) { // keep accumulating
>				int count = 1;
>				ReferenceBinding currentEnclosingType;
>				while ((currentEnclosingType = currentType.enclosingType()) != null) {
>					//done?
>					if (currentType == targetEnclosingType
>						|| targetEnclosingType.isSuperclassOf(currentType))
>						break;
>					syntheticField = ((NestedTypeBinding) currentType).getSyntheticField((SourceTypeBinding) currentEnclosingType, this, false);
>					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
>					|| targetEnclosingType.isSuperclassOf(currentType)) {
>					return path;
>				}
>			}
>		}
>		return null;
>	}
>
>	/* API
>	 *
>	 *	Answer the constructor binding that corresponds to receiverType, argumentTypes.
>	 *
>	 *	InvocationSite implements 
>	 *		isSuperAccess(); this is used to determine if the discovered constructor is visible.
>	 *
>	 *	If no visible constructor is discovered, an error binding is answered.
>	 */
>	public MethodBinding getConstructor(
>		ReferenceBinding receiverType,
>		TypeBinding[] argumentTypes,
>		InvocationSite invocationSite) {
>
>		compilationUnitScope().recordTypeReference(receiverType);
>		compilationUnitScope().recordTypeReferences(argumentTypes);
>		MethodBinding methodBinding = receiverType.getExactConstructor(argumentTypes);
>		if (methodBinding != null)
>			if (methodBinding.canBeSeenBy(invocationSite, this))
>				return methodBinding;
>
>		MethodBinding[] methods =
>			receiverType.getMethods(ConstructorDeclaration.ConstantPoolName);
>		if (methods == NoMethods)
>			return new ProblemMethodBinding(
>				ConstructorDeclaration.ConstantPoolName,
>				argumentTypes,
>				NotFound);
>
>		MethodBinding[] compatible = new MethodBinding[methods.length];
>		int compatibleIndex = 0;
>		for (int i = 0, length = methods.length; i < length; i++)
>			if (areParametersAssignable(methods[i].parameters, argumentTypes))
>				compatible[compatibleIndex++] = methods[i];
>		if (compatibleIndex == 0)
>			return new ProblemMethodBinding(
>				ConstructorDeclaration.ConstantPoolName,
>				argumentTypes,
>				NotFound);
>		// need a more descriptive error... cannot convert from X to Y
>
>		MethodBinding[] visible = new MethodBinding[compatibleIndex];
>		int visibleIndex = 0;
>		for (int i = 0; i < compatibleIndex; i++) {
>			MethodBinding method = compatible[i];
>			if (method.canBeSeenBy(invocationSite, this))
>				visible[visibleIndex++] = method;
>		}
>		if (visibleIndex == 1)
>			return visible[0];
>		if (visibleIndex == 0)
>			return new ProblemMethodBinding(
>				ConstructorDeclaration.ConstantPoolName,
>				argumentTypes,
>				NotVisible);
>		return mostSpecificClassMethodBinding(visible, visibleIndex);
>	}
>
>	/*
>	 * 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
>	 * 		nil 		 								: not found
>	 *
>	 *	EXACT MATCH VERSION - no type compatibility is performed
>	 */
>	public Object[] getExactEmulationPath(ReferenceBinding targetEnclosingType) {
>
>		MethodScope currentMethodScope = this.methodScope();
>		SourceTypeBinding sourceType = currentMethodScope.enclosingSourceType();
>
>		// identity check
>		if (!currentMethodScope.isStatic 
>			&& (sourceType == targetEnclosingType)) {
>			if (currentMethodScope.isConstructorCall) {
>				return EmulationPathToImplicitThisInConstructorCall;
>			}
>			return EmulationPathToImplicitThis; // implicit this is good enough
>		}
>		if (!sourceType.isNestedType()
>			|| sourceType.isStatic()) { // no emulation from within non-inner types
>			return null;
>		}
>
>		boolean insideConstructor =
>			currentMethodScope.isInsideInitializerOrConstructor();
>		// use synthetic constructor arguments if possible
>		if (insideConstructor) {
>			SyntheticArgumentBinding syntheticArg;
>			if ((syntheticArg = ((NestedTypeBinding) sourceType).getSyntheticArgument(targetEnclosingType, this, true)) != null) {
>				return new Object[] { syntheticArg };
>			}
>		}
>		// use a direct synthetic field then
>		if (!currentMethodScope.isStatic) {
>			FieldBinding syntheticField;
>			if ((syntheticField = sourceType.getSyntheticField(targetEnclosingType, this, true)) != null) {
>				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((SourceTypeBinding) currentType,	this, true);
>			} else {
>				path[0] =
>					sourceType.getSyntheticField((SourceTypeBinding) currentType, this, true);
>			}
>			if (path[0] != null) { // keep accumulating
>				int count = 1;
>				ReferenceBinding currentEnclosingType;
>				while ((currentEnclosingType = currentType.enclosingType()) != null) {
>
>					if (currentMethodScope != null) {
>						currentMethodScope = currentMethodScope.enclosingMethodScope();
>						if (currentMethodScope != null && currentMethodScope.isConstructorCall){
>							return new Object[] { new ProblemFieldBinding()//currentEnclosingType, new char[0], 0) };
>								break;
>						}
>					}
>					
>					//done?
>					if (currentType == targetEnclosingType)
>						break;
>					syntheticField =
>						((NestedTypeBinding) currentType).getSyntheticField(
>							(SourceTypeBinding) currentEnclosingType,
>							this,
>							true);
>					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) {
>					return path;
>				}
>			}
>		}
>		return null;
>	}
>
>	/* API
>     *	
>	 *	Answer the field binding that corresponds to fieldName.
>	 *	Start the lookup at the receiverType.
>	 *	InvocationSite implements
>	 *		isSuperAccess(); this is used to determine if the discovered field is visible.
>	 *	Only fields defined by the receiverType or its supertypes are answered;
>	 *	a field of an enclosing type will not be found using this API.
>	 *
>	 *	If no visible field is discovered, an error binding is answered.
>	 */
>	public FieldBinding getField(
>		TypeBinding receiverType,
>		char[] fieldName,
>		InvocationSite invocationSite) {
>
>		FieldBinding field = findField(receiverType, fieldName, invocationSite);
>		if (field == null)
>			return new ProblemFieldBinding(
>				receiverType instanceof ReferenceBinding
>					? (ReferenceBinding) receiverType
>					: null,
>				fieldName,
>				NotFound);
>		else
>			return field;
>	}
>
>	/* API
>     *	
>	 *	Answer the method binding that corresponds to selector, argumentTypes.
>	 *	Start the lookup at the enclosing type of the receiver.
>	 *	InvocationSite implements 
>	 *		isSuperAccess(); this is used to determine if the discovered method is visible.
>	 *		setDepth(int); this is used to record the depth of the discovered method
>	 *			relative to the enclosing type of the receiver. (If the method is defined
>	 *			in the enclosing type of the receiver, the depth is 0; in the next enclosing
>	 *			type, the depth is 1; and so on
>	 * 
>	 *	If no visible method is discovered, an error binding is answered.
>	 */
>	public MethodBinding getImplicitMethod(
>		char[] selector,
>		TypeBinding[] argumentTypes,
>		InvocationSite invocationSite) {
>
>		boolean insideStaticContext = false;
>		boolean insideConstructorCall = false;
>		MethodBinding foundMethod = null;
>		ProblemMethodBinding foundFuzzyProblem = null;
>		// the weird method lookup case (matches method name in scope, then arg types, then visibility)
>		ProblemMethodBinding foundInsideProblem = null;
>		// inside Constructor call or inside static context
>		Scope scope = this;
>		int depth = 0;
>		done : while (true) { // done when a COMPILATION_UNIT_SCOPE is found
>			switch (scope.kind) {
>				case METHOD_SCOPE :
>					MethodScope methodScope = (MethodScope) scope;
>					insideStaticContext |= methodScope.isStatic;
>					insideConstructorCall |= methodScope.isConstructorCall;
>					break;
>				case CLASS_SCOPE :
>					ClassScope classScope = (ClassScope) scope;
>					SourceTypeBinding receiverType = classScope.referenceContext.binding;
>					boolean isExactMatch = true;
>					// retrieve an exact visible match (if possible)
>					MethodBinding methodBinding =
>						(foundMethod == null)
>							? classScope.findExactMethod(
>								receiverType,
>								selector,
>								argumentTypes,
>								invocationSite)
>							: classScope.findExactMethod(
>								receiverType,
>								foundMethod.selector,
>								foundMethod.parameters,
>								invocationSite);
>					//						? findExactMethod(receiverType, selector, argumentTypes, invocationSite)
>					//						: findExactMethod(receiverType, foundMethod.selector, foundMethod.parameters, invocationSite);
>					if (methodBinding == null) {
>						// answers closest approximation, may not check argumentTypes or visibility
>						isExactMatch = false;
>						methodBinding =
>							classScope.findMethod(receiverType, selector, argumentTypes, invocationSite);
>						//					methodBinding = findMethod(receiverType, selector, argumentTypes, invocationSite);
>					}
>					if (methodBinding != null) { // skip it if we did not find anything
>						if (methodBinding.problemId() == Ambiguous) {
>							if (foundMethod == null || foundMethod.problemId() == NotVisible)
>								// supercedes any potential InheritedNameHidesEnclosingName problem
>								return methodBinding;
>							else
>								// make the user qualify the method, likely wants the first inherited method (javac generates an ambiguous error instead)
>								return new ProblemMethodBinding(
>									selector,
>									argumentTypes,
>									InheritedNameHidesEnclosingName);
>						}
>
>						ProblemMethodBinding fuzzyProblem = null;
>						ProblemMethodBinding insideProblem = null;
>						if (methodBinding.isValidBinding()) {
>							if (!isExactMatch) {
>								if (!areParametersAssignable(methodBinding.parameters, argumentTypes)) {
>									if (foundMethod == null || foundMethod.problemId() == NotVisible){
>										// inherited mismatch is reported directly, not looking at enclosing matches
>										return new ProblemMethodBinding(methodBinding, selector, argumentTypes, NotFound);
>									}
>									// make the user qualify the method, likely wants the first inherited method (javac generates an ambiguous error instead)
>									fuzzyProblem = new ProblemMethodBinding(selector, argumentTypes, InheritedNameHidesEnclosingName);
>
>								} else if (!methodBinding.canBeSeenBy(receiverType, invocationSite, classScope)) {
>									// using <classScope> instead of <this> for visibility check does grant all access to innerclass
>									fuzzyProblem =
>										new ProblemMethodBinding(
>											selector,
>											argumentTypes,
>											methodBinding.declaringClass,
>											NotVisible);
>								}
>							}
>							if (fuzzyProblem == null && !methodBinding.isStatic()) {
>								if (insideConstructorCall) {
>									insideProblem =
>										new ProblemMethodBinding(
>											methodBinding.selector,
>											methodBinding.parameters,
>											NonStaticReferenceInConstructorInvocation);
>								} else if (insideStaticContext) {
>									insideProblem =
>										new ProblemMethodBinding(
>											methodBinding.selector,
>											methodBinding.parameters,
>											NonStaticReferenceInStaticContext);
>								}
>							}
>							
>							if (receiverType == methodBinding.declaringClass
>								|| (receiverType.getMethods(selector)) != NoMethods
>								|| ((fuzzyProblem == null || fuzzyProblem.problemId() != NotVisible) && environment().options.complianceLevel >= CompilerOptions.JDK1_4)){
>								// found a valid method in the 'immediate' scope (ie. not inherited)
>								// OR the receiverType implemented a method with the correct name
>								// OR in 1.4 mode (inherited visible shadows enclosing)
>								if (foundMethod == null) {
>									if (depth > 0){
>										invocationSite.setDepth(depth);
>										invocationSite.setActualReceiverType(receiverType);
>									}
>									// return the methodBinding if it is not declared in a superclass of the scope's binding (i.e. "inherited")
>									if (fuzzyProblem != null)
>										return fuzzyProblem;
>									if (insideProblem != null)
>										return insideProblem;
>									return methodBinding;
>								}
>								// if a method was found, complain when another is found in an 'immediate' enclosing type (ie. not inherited)
>								// NOTE: Unlike fields, a non visible method hides a visible method
>								if (foundMethod.declaringClass != methodBinding.declaringClass)
>									// ie. have we found the same method - do not trust field identity yet
>									return new ProblemMethodBinding(
>										methodBinding.selector,
>										methodBinding.parameters,
>										InheritedNameHidesEnclosingName);
>							}
>						}
>
>						if (foundMethod == null
>							|| (foundMethod.problemId() == NotVisible
>								&& methodBinding.problemId() != NotVisible)) {
>							// only remember the methodBinding if its the first one found or the previous one was not visible & methodBinding is...
>							// remember that private methods are visible if defined directly by an enclosing class
>							if (depth > 0){
>								invocationSite.setDepth(depth);
>								invocationSite.setActualReceiverType(receiverType);
>							}
>							foundFuzzyProblem = fuzzyProblem;
>							foundInsideProblem = insideProblem;
>							if (fuzzyProblem == null)
>								foundMethod = methodBinding; // only keep it if no error was found
>						}
>					}
>					depth++;
>					insideStaticContext |= receiverType.isStatic();
>					// 1EX5I8Z - accessing outer fields within a constructor call is permitted
>					// in order to do so, we change the flag as we exit from the type, not the method
>					// itself, because the class scope is used to retrieve the fields.
>					MethodScope enclosingMethodScope = scope.methodScope();
>					insideConstructorCall =
>						enclosingMethodScope == null ? false : enclosingMethodScope.isConstructorCall;
>					break;
>				case COMPILATION_UNIT_SCOPE :
>					break done;
>			}
>			scope = scope.parent;
>		}
>
>		if (foundFuzzyProblem != null)
>			return foundFuzzyProblem;
>		if (foundInsideProblem != null)
>			return foundInsideProblem;
>		if (foundMethod != null)
>			return foundMethod;
>		return new ProblemMethodBinding(selector, argumentTypes, NotFound);
>	}
>
>	/* API
>     *	
>	 *	Answer the method binding that corresponds to selector, argumentTypes.
>	 *	Start the lookup at the receiverType.
>	 *	InvocationSite implements 
>	 *		isSuperAccess(); this is used to determine if the discovered method is visible.
>	 *
>	 *	Only methods defined by the receiverType or its supertypes are answered;
>	 *	use getImplicitMethod() to discover methods of enclosing types.
>	 *
>	 *	If no visible method is discovered, an error binding is answered.
>	 */
>	public MethodBinding getMethod(
>		TypeBinding receiverType,
>		char[] selector,
>		TypeBinding[] argumentTypes,
>		InvocationSite invocationSite) {
>
>		if (receiverType.isArrayType())
>			return findMethodForArray(
>				(ArrayBinding) receiverType,
>				selector,
>				argumentTypes,
>				invocationSite);
>		if (receiverType.isBaseType())
>			return new ProblemMethodBinding(selector, argumentTypes, NotFound);
>
>		ReferenceBinding currentType = (ReferenceBinding) receiverType;
>		if (!currentType.canBeSeenBy(this))
>			return new ProblemMethodBinding(selector, argumentTypes, ReceiverTypeNotVisible);
>
>		// retrieve an exact visible match (if possible)
>		MethodBinding methodBinding =
>			findExactMethod(currentType, selector, argumentTypes, invocationSite);
>		if (methodBinding != null)
>			return methodBinding;
>
>		// answers closest approximation, may not check argumentTypes or visibility
>		methodBinding =
>			findMethod(currentType, selector, argumentTypes, invocationSite);
>		if (methodBinding == null)
>			return new ProblemMethodBinding(selector, argumentTypes, NotFound);
>		if (methodBinding.isValidBinding()) {
>			if (!areParametersAssignable(methodBinding.parameters, argumentTypes))
>				return new ProblemMethodBinding(
>					methodBinding,
>					selector,
>					argumentTypes,
>					NotFound);
>			if (!methodBinding.canBeSeenBy(currentType, invocationSite, this))
>				return new ProblemMethodBinding(
>					selector,
>					argumentTypes,
>					methodBinding.declaringClass,
>					NotVisible);
>		}
>		return methodBinding;
>	}
>
>	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,
>		boolean useDirectReference,
>		AstNode reference) {
>
>		// perform some emulation work in case there is some and we are inside a local type only
>		// propage emulation of the enclosing instances
>		ReferenceBinding[] syntheticArgumentTypes;
>		if ((syntheticArgumentTypes = targetType.syntheticEnclosingInstanceTypes())
>			!= null) {
>			for (int i = 0, max = syntheticArgumentTypes.length; i < max; i++) {
>				ReferenceBinding syntheticArgType = syntheticArgumentTypes[i];
>				// need to filter out the one that could match a supplied enclosing instance
>				if (!(isEnclosingInstanceSupplied
>					&& (syntheticArgType == targetType.enclosingType()))) {
>					this.emulateOuterAccess(syntheticArgType, useDirectReference, reference);
>				}
>			}
>		}
>		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.
>	 *
>	 * i.e. the nearest enclosing type of this scope.
>	 */
>	public TypeDeclaration referenceType() {
>
>		return methodScope().referenceType();
>	}
>
>	// 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 < scopeIndex; i++)
>			if (subscopes[i] instanceof BlockScope)
>				s += ((BlockScope) subscopes[i]).toString(tab + 1) + "\n"; //$NON-NLS-1$
>		return s;
>	}
>}

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Attachments on bug 29366: 2954