Field Summary

Fields 

Modifiers	Name	Description
protected List<TypeCheckingExtension>	handlers	Registered delegate extensions consulted by this composite handler.

Inherited fields 

Fields inherited from class	Fields
class TypeCheckingExtension	typeCheckingVisitor

Constructor Summary

Constructors 

Constructor and description
DefaultTypeCheckingExtension(StaticTypeCheckingVisitor typeCheckingVisitor) Creates the default composite type-checking extension.

Methods Summary

Methods 

Type Params	Return Type	Name and description
	public boolean	addHandler(TypeCheckingExtension handler) Adds a delegate handler if it is not already registered.
	public void	afterMethodCall(MethodCall call) * Allows the extension to perform additional tasks after the type checker actually visits a method call. * Compared to a custom visitor, this method ensures that the node being visited is a node which would have * been visited by the type checker. This is in particular important for nodes which are marked with * TypeCheckingMode.SKIP. * Parameters: call - a method call, either a MethodCallExpression, StaticMethodCallExpression, or ConstructorCallExpression
	public void	afterVisitClass(ClassNode node) * Allows the extension to perform additional tasks after the type checker actually visited a class node. * Compared to a custom visitor, this method ensures that the node being visited is a node which would have * been visited by the type checker. This is in particular important for nodes which are marked with * TypeCheckingMode.SKIP. * Parameters: node - a class node
	public void	afterVisitMethod(MethodNode node) * Allows the extension to perform additional tasks after the type checker actually visited a method node. * Compared to a custom visitor, this method ensures that the node being visited is a node which would have * been visited by the type checker. This is in particular important for nodes which are marked with * TypeCheckingMode.SKIP. * Parameters: node - a method node
	public boolean	beforeMethodCall(MethodCall call) * Allows the extension to perform additional tasks before the type checker actually visits a method call. * Compared to a custom visitor, this method ensures that the node being visited is a node which would have * been visited by the type checker. This is in particular important for nodes which are marked with * TypeCheckingMode.SKIP. * * Parameters: call - a method call, either a MethodCallExpression, StaticMethodCallExpression, or ConstructorCallExpression * Returns: false if the type checker should visit the node, or true if this extension replaces what the * type checker would do with the method call.
	public boolean	beforeVisitClass(ClassNode node) * Allows the extension to perform additional tasks before the type checker actually visits a class node. * Compared to a custom visitor, this method ensures that the node being visited is a node which would have * been visited by the type checker. This is in particular important for nodes which are marked with * TypeCheckingMode.SKIP. * Parameters: node - a class node * Returns: false if the type checker should visit the node, or true if this extension replaces what the * type checker would do with the class.
	public boolean	beforeVisitMethod(MethodNode node) * Allows the extension to perform additional tasks before the type checker actually visits a method node. * Compared to a custom visitor, this method ensures that the node being visited is a node which would have * been visited by the type checker. This is in particular important for nodes which are marked with * TypeCheckingMode.SKIP. * Parameters: node - a method node * Returns: false if the type checker should visit the node, or true if this extension replaces what the * type checker would do with the method.
	public void	finish() * Subclasses should implement this method if they need to perform additional * checks after the type checker has finished its work. This is particularly * useful for situations where you need multiple passes. Some checks in that * case may be deferred to the end, using this method.
	public List<MethodNode>	handleAmbiguousMethods(List<MethodNode> nodes, Expression origin) * This method is called by the type checker before throwing an "ambiguous method" error, giving the chance * to the extension to select the method properly. This means that when this method is called, the "nodes" * parameter contains at least two methods. If the returned list still contains at least two methods, then the * type checker will throw an ambiguous method call error. If the returned method contains 1 element, then * the type checker will not throw any error. * * It is invalid to return an empty list. * * Parameters: nodes - the list of ambiguous methods * origin - the expression which originated the method selection process * Returns: a single element list of disambiguated selection, or more elements if still ambiguous. It is not allowed * to return an empty list.
	public boolean	handleIncompatibleAssignment(ClassNode lhsType, ClassNode rhsType, Expression assignmentExpression) * This method is called by the type checker when an assignment is not allowed by the type checker. * Extensions may override this method to allow such assignments where the type checker normally disallows * them. * * Parameters: lhsType - the type of the left hand side of the assignment, as found by the type checker * rhsType - the type of the right hand side of the assignment, as found by the type checker * assignmentExpression - the assignment expression which triggered this call * Returns: boolean false if the extension does not handle this assignment, true otherwise
	public boolean	handleIncompatibleReturnType(ReturnStatement returnStatement, ClassNode inferredReturnType) * Allows the extension to catch incompatible return types. This event is called whenever the type * checker finds that an inferred return type is incompatible with the declared return type of * a method. * * Parameters: returnStatement - the statement that triggered the error * inferredReturnType - the inferred return type for this statement * Returns: false if the extension doesn't handle the error, true otherwise
	public List<MethodNode>	handleMissingMethod(ClassNode receiver, String name, ArgumentListExpression argumentList, ClassNode[] argumentTypes, MethodCall call) * This method is called by the type checker when a method call cannot be resolved. Extensions * may override this method to handle missing methods and prevent the type checker from throwing an * error. * * * Parameters: receiver - the type of the receiver * name - the name of the called method * argumentList - the list of arguments of the call * argumentTypes - the types of the arguments of the call * call - the method call itself, if needed * Returns: an empty list if the extension cannot resolve the method, or a list of potential * methods if the extension finds candidates. This method must not return null.
	public boolean	handleUnresolvedAttribute(AttributeExpression aexp) * This method is called by the type checker when an attribute expression cannot * be resolved (for example, when an attribute doesn't exist). It gives the extension * a chance to resolve it. * * Parameters: aexp - the unresolved attribute * Returns: boolean false if this extension doesn't resolve the attribute, true * if it resolves the attribute.
	public boolean	handleUnresolvedProperty(PropertyExpression pexp) * This method is called by the type checker when a property expression cannot * be resolved (for example, when a property doesn't exist). It gives the extension * a chance to resolve it. * * Parameters: pexp - the unresolved property * Returns: boolean false if this extension doesn't resolve the property, true * if it resolves the property.
	public boolean	handleUnresolvedVariableExpression(VariableExpression vexp) * This method is called by the type checker when a variable expression cannot * be resolved. It gives the extension a chance to resolve it for the type * checker. * * Parameters: vexp - the unresolved variable extension * Returns: boolean false if the extension doesn't handle it, * true if the extension handles this variable.
	public void	onMethodSelection(Expression expression, MethodNode target) * Allows the extension to listen to method selection events. Given an expression, which may be a method * call expression, a static method call expression, a pre/postfix expression, ..., if a corresponding * method is found, this method is called. * Parameters: expression - the expression for which a corresponding method has been found * target - the method which has been chosen by the type checker
	public void	removeHandler(TypeCheckingExtension handler) Removes a delegate handler.
	public void	setup() * Subclasses should implement this method whenever they need to perform * special checks before the type checker starts working.

Inherited Methods Summary

Inherited Methods 

Methods inherited from class

Name

class TypeCheckingExtension

addStaticTypeError, afterMethodCall, afterVisitClass, afterVisitMethod, beforeMethodCall, beforeVisitClass, beforeVisitMethod, buildListType, buildMapType, classNodeFor, classNodeFor, existsProperty, existsProperty, extractStaticReceiver, finish, getArgumentTypes, getOptions, getTargetMethod, getType, handleAmbiguousMethods, handleIncompatibleAssignment, handleIncompatibleReturnType, handleMissingMethod, handleUnresolvedAttribute, handleUnresolvedProperty, handleUnresolvedVariableExpression, isStaticMethodCallOnClass, lookupClassNodeFor, onMethodSelection, parameterizedType, setOptions, setup, storeType