My instances describe the behavior of other objects. I provide the minimum state necessary for compiling methods, and creating and running instances. Most objects are created as instances of the more fully supported subclass, Class, but I am a good starting point for providing instance-specific behavior (as in Metaclass).

	accessing
	compilerClass confirmRemovalOf: decompilerClass environment evaluatorClass format methodDict name parserClass sourceCodeTemplate subclassDefinerClass typeOfClass

	accessing class hierarchy
	allSelectorsUnderstood allSubclassesWithLevelDo:startingLevel: allSuperclasses superclass withAllSuperclasses

	accessing instances and variables
	allClassVarNames allInstVarNames allInstances allSharedPools allSubInstances classVarNames inspectAllInstances inspectSubInstances instVarNames instanceCount sharedPools someInstance subclassInstVarNames

accessing method dictionary

>> allSelectors changeRecordsAt: compiledMethodAt: compiledMethodAt:ifAbsent: compressedSourceCodeAt: firstCommentAt: firstPrecodeCommentFor: formalHeaderPartsFor: formalParametersAt: lookupSelector: methodHeaderFor: methodsDo: positionOfFirstCommentAt: precodeCommentOrInheritedCommentFor: rootStubInImageSegment: selectorAtMethod:setClass: selectors selectorsAndMethodsDo: selectorsDo: selectorsWithArgs: sourceCodeAt: sourceCodeAt:ifAbsent: sourceMethodAt: sourceMethodAt:ifAbsent: supermostPrecodeCommentFor:

	copying
	copy copyOfMethodDictionary deepCopy

	creating class hierarchy
	superclass:

	creating method dictionary
	addSelector:withMethod: compile: compile:notifying: compileAll compileAllFrom: compress decompile: defaultSelectorForMethod: methodDictionary methodDictionary: recompile: recompile:from: recompileChanges recompileNonResidentMethod:atSelector:from: removeSelector:

	enumerating
	allInstancesDo: allInstancesEverywhereDo: allSubInstancesDo: allSubclassesDo: allSubclassesDoGently: allSuperclassesDo: selectSubclasses: selectSuperclasses: withAllSubclassesDo: withAllSuperAndSubclassesDoGently: withAllSuperclassesDo:

	initialize-release
	forgetDoIts nonObsoleteClass obsolete superclass:methodDictionary:format:

	instance creation
	basicNew basicNew: initializedInstance new new:

	obsolete subclasses
	addObsoleteSubclass: obsoleteSubclasses

	printing
	defaultNameStemForInstances literalScannedAs:notifying: longPrintOn: printHierarchy printOn: printOnStream: storeLiteral:on:

	private
	becomeCompact becomeCompactSimplyAt: becomeUncompact flushCache indexIfCompact removeSelectorSimply:

	system startup
	shutDown shutDown: startUp startUp: startUpFrom:

	testing
	canZapMethodDictionary fullyImplementsVocabulary: implementsVocabulary: instSize instSpec isBehavior isBits isBytes isFixed isObsolete isPointers isVariable isWeak isWords shouldNotBeRedefined

	testing class hierarchy
	includesBehavior: inheritsFrom: kindOfSubclass

	testing method dictionary
	allUnsentMessages canUnderstand: classThatUnderstands: hasMethods includesSelector: scopeHas:ifTrue: thoroughWhichSelectorsReferTo:special:byte: whichClassIncludesSelector: whichSelectorsAccess: whichSelectorsReferTo: whichSelectorsReferTo:special:byte: whichSelectorsStoreInto:

	user interface
	allCallsOn: allLocalCallsOn: allUnreferencedInstanceVariables browse browseAllAccessesTo: browseAllCallsOn: browseAllStoresInto: crossReference unreferencedInstanceVariables withAllSubAndSuperclassesDo:

	testing
	canZapMethodDictionary

	Camp Smalltalk	top
	sunitAllSelectors
	sunitSelectors

	accessing	top
	compilerClass Answer a compiler class appropriate for source methods of this class.
	confirmRemovalOf: Determine if it is okay to remove the given selector. Answer 1 if it should be removed, 2 if it should be removed followed by a senders browse, and 3 if it should not be removed.
	decompilerClass Answer a decompiler class appropriate for compiled methods of this class.
	environment Return the environment in which the receiver is visible
	evaluatorClass Answer an evaluator class appropriate for evaluating expressions in the context of this class.
	format Answer an Integer that encodes the kinds and numbers of variables of instances of the receiver.
	methodDict
	name Answer a String that is the name of the receiver.
	parserClass Answer a parser class to use for parsing method headers.
	sourceCodeTemplate Answer an expression to be edited and evaluated in order to define methods in this class.
	subclassDefinerClass Answer an evaluator class appropriate for evaluating definitions of new subclasses of this class.
	typeOfClass Answer a symbol uniquely describing the type of the receiver

	accessing class hierarchy	top
	allSelectorsUnderstood Answer a list of all selectors understood by instances of the receiver
	allSubclassesWithLevelDo:startingLevel: Walk the tree of subclasses, giving the class and its level
	allSuperclasses Answer an OrderedCollection of the receiver's and the receiver's ancestor's superclasses. The first element is the receiver's immediate superclass, followed by its superclass; the last element is Object.
	superclass Answer the receiver's superclass, a Class.
	withAllSuperclasses Answer an OrderedCollection of the receiver and the receiver's superclasses. The first element is the receiver, followed by its superclass; the last element is Object.

	accessing instances and variables	top
	allClassVarNames Answer a Set of the names of the receiver's and the receiver's ancestor's class variables.
	allInstVarNames Answer an Array of the names of the receiver's instance variables. The Array ordering is the order in which the variables are stored and accessed by the interpreter.
	allInstances Answer a collection of all current instances of the receiver.
	allSharedPools Answer a Set of the names of the pools (Dictionaries) that the receiver and the receiver's ancestors share.
	allSubInstances Answer a list of all current instances of the receiver and all of its subclasses.
	classVarNames Answer a Set of the receiver's class variable names.
	inspectAllInstances Inpsect all instances of the receiver. 1/26/96 sw
	inspectSubInstances Inspect all instances of the receiver and all its subclasses. CAUTION - don't do this for something as generic as Object! 1/26/96 sw
	instVarNames Answer an Array of the instance variable names. Behaviors must make up fake local instance variable names because Behaviors have instance variables for the purpose of compiling methods, but these are not named instance variables.
	instanceCount Answer the number of instances of the receiver that are currently in use.
	sharedPools Answer a Set of the names of the pools (Dictionaries) that the receiver shares. 9/12/96 tk sharedPools have an order now
	someInstance Primitive. Answer the first instance in the enumeration of all instances of the receiver. Fails if there are none. Essential. See Object documentation whatIsAPrimitive.
	subclassInstVarNames Answer a Set of the names of the receiver's subclasses' instance variables.

	accessing method dictionary	top
	>> Answer the compiled method associated with the argument, selector (a Symbol), a message selector in the receiver's method dictionary. If the selector is not in the dictionary, create an error notification.
	allSelectors Answer a Set of all the message selectors that instances of the receiver can understand.
	changeRecordsAt: Return a list of ChangeRecords for all versions of the method at selector. Source code can be retrieved by sending string to any one. Return nil if the method is absent.
	compiledMethodAt: Answer the compiled method associated with the argument, selector (a Symbol), a message selector in the receiver's method dictionary. If the selector is not in the dictionary, create an error notification.
	compiledMethodAt:ifAbsent: Answer the compiled method associated with the argument, selector (a Symbol), a message selector in the receiver's method dictionary. If the selector is not in the dictionary, return the value of aBlock
	compressedSourceCodeAt: (Paragraph compressedSourceCodeAt: #displayLines:affectedRectangle:) size 721 1921 Paragraph selectors inject: 0 into: [:tot :sel | tot + (Paragraph compressedSourceCodeAt: sel) size] 13606 31450
	firstCommentAt: Answer a string representing the first comment in the method associated with selector. Return an empty string if the relevant source file is not available, or if the method's source code does not contain a comment. Not smart enough to bypass quotes in string constants, but does map doubled quote into a single quote.
	firstPrecodeCommentFor: If there is a comment in the source code at the given selector that preceeds the body of the method, return it here, else return nil
	formalHeaderPartsFor: popeye
	formalParametersAt: Return the names of the arguments used in this method.
	lookupSelector: Look up the given selector in my methodDictionary. Return the corresponding method if found. Otherwise chase the superclass chain and try again. Return nil if no method is found.
	methodHeaderFor: Answer the string corresponding to the method header for the given selector
	methodsDo: Evaluate aBlock for all the compiled methods in my method dictionary.
	positionOfFirstCommentAt: Answer the position in the source string associated with aSelector of the first comment therein, or an empty string if none
	precodeCommentOrInheritedCommentFor: Answer a string representing the first comment in the method associated with selector, considering however only comments that occur before the beginning of the actual code. If the version recorded in the receiver is uncommented, look up the inheritance chain. Return nil if none found.
	rootStubInImageSegment:
	selectorAtMethod:setClass: Answer both the message selector associated with the compiled method and the class in which that selector is defined.
	selectors Answer a Set of all the message selectors specified in the receiver's method dictionary.
	selectorsAndMethodsDo: Evaluate selectorBlock for all the message selectors in my method dictionary.
	selectorsDo: Evaluate selectorBlock for all the message selectors in my method dictionary.
	selectorsWithArgs: Return all selectors defined in this class that take this number of arguments. Could use String.keywords. Could see how compiler does this.
	sourceCodeAt:
	sourceCodeAt:ifAbsent:
	sourceMethodAt: Answer the paragraph corresponding to the source code for the argument.
	sourceMethodAt:ifAbsent: Answer the paragraph corresponding to the source code for the argument.
	supermostPrecodeCommentFor: Answer a string representing the precode comment in the most distant superclass's implementation of the selector. Return nil if none found.

	copying	top
	copy Answer a copy of the receiver without a list of subclasses.
	copyOfMethodDictionary Return a copy of the receiver's method dictionary
	deepCopy Classes should only be shallowCopied or made anew.

	creating class hierarchy	top
	superclass: Change the receiver's superclass to be aClass.

	creating method dictionary	top
	addSelector:withMethod: Add the message selector with the corresponding compiled method to the receiver's method dictionary.
	compile: Compile the argument, code, as source code in the context of the receiver. Create an error notification if the code can not be compiled. The argument is either a string or an object that converts to a string or a PositionableStream on an object that converts to a string.
	compile:notifying: Compile the argument, code, as source code in the context of the receiver and insEtall the result in the receiver's method dictionary. The second argument, requestor, is to be notified if an error occurs. The argument code is either a string or an object that converts to a string or a PositionableStream. This method also saves the source code.
	compileAll
	compileAllFrom: Compile all the methods in the receiver's method dictionary. This validates sourceCode and variable references and forces all methods to use the current bytecode set
	compress Compact the method dictionary of the receiver.
	decompile: Find the compiled code associated with the argument, selector, as a message selector in the receiver's method dictionary and decompile it. Answer the resulting source code as a string. Create an error notification if the selector is not in the receiver's method dictionary.
	defaultSelectorForMethod: Given a method, invent and answer an appropriate message selector (a Symbol), that is, one that will parse with the correct number of arguments.
	methodDictionary Convenience
	methodDictionary: Store the argument, aDictionary, as the method dictionary of the receiver.
	recompile: Compile the method associated with selector in the receiver's method dictionary.
	recompile:from: Compile the method associated with selector in the receiver's method dictionary.
	recompileChanges Compile all the methods that are in the changes file. This validates sourceCode and variable references and forces methods to use the current bytecode set
	recompileNonResidentMethod:atSelector:from: Recompile the method supplied in the context of this class.
	removeSelector: Assuming that the argument, selector (a Symbol), is a message selector in my method dictionary, remove it and its method.

	enumerating	top
	allInstancesDo: Evaluate the argument, aBlock, for each of the current instances of the receiver.
	allInstancesEverywhereDo: Evaluate the argument, aBlock, for each of the current instances of the receiver. Including those in ImageSegments that are out on the disk. Bring each in briefly.
	allSubInstancesDo: Evaluate the argument, aBlock, for each of the current instances of the receiver and all its subclasses.
	allSubclassesDo: Evaluate the argument, aBlock, for each of the receiver's subclasses.
	allSubclassesDoGently: Evaluate the argument, aBlock, for each of the receiver's subclasses.
	allSuperclassesDo: Evaluate the argument, aBlock, for each of the receiver's superclasses.
	selectSubclasses: Evaluate the argument, aBlock, with each of the receiver's (next level) subclasses as its argument. Collect into a Set only those subclasses for which aBlock evaluates to true. In addition, evaluate aBlock for the subclasses of each of these successful subclasses and collect into the set those for which aBlock evaluates true. Answer the resulting set.
	selectSuperclasses: Evaluate the argument, aBlock, with the receiver's superclasses as the argument. Collect into an OrderedCollection only those superclasses for which aBlock evaluates to true. In addition, evaluate aBlock for the superclasses of each of these successful superclasses and collect into the OrderedCollection ones for which aBlock evaluates to true. Answer the resulting OrderedCollection.
	withAllSubclassesDo: Evaluate the argument, aBlock, for the receiver and each of its subclasses.
	withAllSuperAndSubclassesDoGently:
	withAllSuperclassesDo: Evaluate the argument, aBlock, for each of the receiver's superclasses.

	initialize-release	top
	forgetDoIts get rid of old DoIt methods
	nonObsoleteClass Attempt to find and return the current version of this obsolete class
	obsolete Invalidate and recycle local messages, e.g., zap the method dictionary if can be done safely.
	superclass:methodDictionary:format: Basic initialization of the receiver. Must only be sent to a new instance; else we would need Object flushCache.

	instance creation	top
	basicNew Primitive. Answer an instance of the receiver (which is a class) with no indexable variables. Fail if the class is indexable. Essential. See Object documentation whatIsAPrimitive.
	basicNew: Primitive. Answer an instance of this class with the number of indexable variables specified by the argument, sizeRequested. Fail if this class is not indexable or if the argument is not a positive Integer, or if there is not enough memory available. Essential. See Object documentation whatIsAPrimitive.
	initializedInstance Answer an instance of the receiver which in some sense is initialized. In the case of Morphs, this will yield an instance that can be attached to the Hand after having received the same kind of basic initialization that would be obtained from an instance chosen from the 'new morph' menu. Return nil if the receiver is reluctant for some reason to return such a thing
	new Answer a new instance of the receiver (which is a class) with no indexable variables. Fail if the class is indexable.
	new: Answer an instance of this class with the number of indexable variables specified by the argument, sizeRequested.

	obsolete subclasses	top
	addObsoleteSubclass: Weakly remember that aClass was a subclass of the receiver and is now obsolete
	obsoleteSubclasses Return all the weakly remembered obsolete subclasses of the receiver

	printing	top
	defaultNameStemForInstances Answer a basis for external names for default instances of the receiver. For classees, the class-name itself is a good one.
	literalScannedAs:notifying: Postprocesses a literal scanned by Scanner scanToken (esp. xLitQuote). If scannedLiteral is not an association, answer it. Else, if it is of the form: nil->#NameOfMetaclass answer nil->theMetaclass, if any has that name, else report an error. Else, if it is of the form: #NameOfGlobalVariable->anythiEng answer the global, class, or pool association with that nameE, if any, else add it to Undeclared a answer the new Association.
	longPrintOn: Append to the argument, aStream, the names and values of all of the receiver's instance variables. But, not useful for a class with a method dictionary.
	printHierarchy Answer a description containing the names and instance variable names of all of the subclasses and superclasses of the receiver.
	printOn: Refer to the comment in Object|printOn:.
	printOnStream: Refer to the comment in Object|printOn:.
	storeLiteral:on: Store aCodeLiteral on aStream, changing an Association to ##GlobalName or ###MetaclassSoleInstanceName format if appropriate

	private	top
	becomeCompact Here are the restrictions on compact classes in order for export segments to work: A compact class index may not be reused. If a class was compact in a release of Squeak, no other class may use that index. The class might not be compact later, and there should be nil in its place in the array.
	becomeCompactSimplyAt: Make me compact, but don't update the instances. For importing segments.
	becomeUncompact
	flushCache Tell the interpreter to remove the contents of its method lookup cache, if it has one. Essential. See Object documentation whatIsAPrimitive.
	indexIfCompact If these 5 bits are non-zero, then instances of this class will be compact. It is crucial that there be an entry in Smalltalk compactClassesArray for any class so optimized. See the msgs becomeCompact and becomeUncompact.
	removeSelectorSimply: Assuming that the argument, selector (a Symbol), is a message selector in my method dictionary, remove it and its method.

	system startup	top
	shutDown This message is sent on system shutdown to registered classes
	shutDown: This message is sent on system shutdown to registered classes
	startUp This message is sent to registered classes when the system is coming up.
	startUp: This message is sent to registered classes when the system is coming up.
	startUpFrom: Override this when a per-instance startUp message needs to be sent. For example, to correct the order of 16-bit non-pointer data when it came from a different endian machine.

	testing	top
	canZapMethodDictionary Return true if it is safe to zap the method dictionary on #obsolete
	fullyImplementsVocabulary: Answer whether instances of the receiver respond to all the messages in aVocabulary
	implementsVocabulary: Answer whether instances of the receiver respond to the messages in aVocabulary.
	instSize Answer the number of named instance variables (as opposed to indexed variables) of the receiver.
	instSpec
	isBehavior Return true if the receiver is a behavior
	isBits Answer whether the receiver contains just bits (not pointers).
	isBytes Answer whether the receiver has 8-bit instance variables.
	isFixed Answer whether the receiver does not have a variable (indexable) part.
	isObsolete Return true if the receiver is obsolete.
	isPointers Answer whether the receiver contains just pointers (not bits).
	isVariable Answer whether the receiver has indexable variables.
	isWeak Answer whether the receiver has contains weak references.
	isWords Answer whether the receiver has 16-bit instance variables.
	shouldNotBeRedefined Return true if the receiver should not be redefined. The assumption is that compact classes, classes in Smalltalk specialObjects and Behaviors should not be redefined

	testing class hierarchy	top
	includesBehavior:
	inheritsFrom: Answer whether the argument, aClass, is on the receiver's superclass chain.
	kindOfSubclass Answer a String that is the keyword that describes the receiver's kind of subclass, either a regular subclass, a variableSubclass, a variableByteSubclass, a variableWordSubclass, or a weakSubclass.

	testing method dictionary	top
	allUnsentMessages Answer an array of all the messages defined by the receiver that are not sent anywhere in the system. 5/8/96 sw
	canUnderstand: Answer whether the receiver can respond to the message whose selector is the argument. The selector can be in the method dictionary of the receiver's class or any of its superclasses.
	classThatUnderstands: Answer the class that can respond to the message whose selector is the argument. The selector can be in the method dictionary of the receiver's class or any of its superclasses.
	hasMethods Answer whether the receiver has any methods in its method dictionary.
	includesSelector: Answer whether the message whose selector is the argument is in the method dictionary of the receiver's class.
	scopeHas:ifTrue: If the argument name is a variable known to the receiver, then evaluate the second argument, assocBlock.
	thoroughWhichSelectorsReferTo:special:byte: Answer a set of selectors whose methods access the argument as a literal. Dives into the compact literal notation, making it slow but thorough
	whichClassIncludesSelector: Answer the class on the receiver's superclass chain where the argument, aSymbol (a message selector), will be found. Answer nil if none found.
	whichSelectorsAccess: Answer a Set of selectors whose methods access the argument, instVarName, as a named instance variable.
	whichSelectorsReferTo: Answer a Set of selectors whose methods access the argument as a literal.
	whichSelectorsReferTo:special:byte: Answer a set of selectors whose methods access the argument as a literal.
	whichSelectorsStoreInto: Answer a Set of selectors whose methods access the argument, instVarName, as a named instance variable.

	user interface	top
	allCallsOn: Answer a SortedCollection of all the methods that call on aSymbol.
	allLocalCallsOn: Answer a SortedCollection of all the methods that call on aSymbol, anywhere in my class hierarchy.
	allUnreferencedInstanceVariables Return a list of the instance variables known to the receiver which are not referenced in the receiver or any of its subclasses OR superclasses
	browse
	browseAllAccessesTo: Collection browseAllAccessesTo: 'contents'.
	browseAllCallsOn: Create and schedule a Message Set browser for all the methods that call on aSymbol.
	browseAllStoresInto: Collection browseAllStoresInto: 'contents'.
	crossReference Answer an Array of arrays of size 2 whose first element is a message selector in the receiver's method dictionary and whose second element is a set of all message selectors in the method dictionary whose methods send a message with that selector. Subclasses are not included.
	unreferencedInstanceVariables Return a list of the instance variables defined in the receiver which are not referenced in the receiver or any of its subclasses. 2/26/96 sw
	withAllSubAndSuperclassesDo:

	class initialization	top
	flushObsoleteSubclasses Behavior flushObsoleteSubclasses
	initialize Behavior initialize
	initializeObsoleteSubclasses

	testing	top
	canZapMethodDictionary Return false since zapping the method dictionary of Behavior class or its subclasses will cause the system to fail.