Package org.codehaus.groovy.transform.stc

# Class StaticTypeCheckingVisitor

java.lang.Object
org.codehaus.groovy.ast.CodeVisitorSupport
org.codehaus.groovy.ast.ClassCodeVisitorSupport
org.codehaus.groovy.transform.stc.StaticTypeCheckingVisitor

All Implemented Interfaces:
  `GroovyClassVisitor`, `GroovyCodeVisitor`, `ErrorCollecting`

Direct Known Subclasses:
  `StaticCompilationVisitor`

    public class StaticTypeCheckingVisitor
    extends ClassCodeVisitorSupport

The main class code visitor responsible for static type checking. It will perform various inspections like checking assignment types, type inference, ... Eventually, class nodes may be annotated with inferred type information.

- ## Nested Class Summary

  Nested Classes
  Modifier and Type | Class | Description
  --- | --- | ---
  `static class` | `StaticTypeCheckingVisitor.SignatureCodecFactory` |
  `protected class` | `StaticTypeCheckingVisitor.VariableExpressionTypeMemoizer` |

- ## Field Summary

  Fields
  Modifier and Type | Field | Description
  --- | --- | ---
  `static MethodNode` | `CLOSURE_CALL_NO_ARG` |
  `static MethodNode` | `CLOSURE_CALL_ONE_ARG` |
  `static MethodNode` | `CLOSURE_CALL_VARGS` |
  `protected static ClassNode` | `CLOSUREPARAMS_CLASSNODE` |
  `protected static Expression` | `CURRENT_SIGNATURE_PROTOCOL` |
  `protected static int` | `CURRENT_SIGNATURE_PROTOCOL_VERSION` |
  `protected FieldNode` | `currentField` |
  `protected PropertyNode` | `currentProperty` |
  `protected static ClassNode` | `DELEGATES_TO` |
  `protected static ClassNode` | `DELEGATES_TO_TARGET` |
  `protected static ClassNode` | `DGM_CLASSNODE` |
  `protected static java.util.List<MethodNode>` | `EMPTY_METHODNODE_LIST` |
  `protected static ClassNode` | `ENUMERATION_TYPE` |
  `protected static java.lang.Object` | `ERROR_COLLECTOR` |
  `protected DefaultTypeCheckingExtension` | `extension` |
  `static Statement` | `GENERATED_EMPTY_STATEMENT` |
  `protected static MethodNode` | `GET_DELEGATE` |
  `protected static MethodNode` | `GET_OWNER` |
  `protected static MethodNode` | `GET_THISOBJECT` |
  `protected static ClassNode` | `ITERABLE_TYPE` |
  `protected static ClassNode` | `LINKEDHASHMAP_CLASSNODE` | Deprecated.
  `protected static ClassNode` | `MAP_ENTRY_TYPE` |
  `protected static ClassNode` | `NAMED_PARAM_CLASSNODE` |
  `protected static ClassNode` | `NAMED_PARAMS_CLASSNODE` |
  `protected ReturnAdder` | `returnAdder` |
  `protected ReturnAdder.ReturnStatementListener` | `returnListener` |
  `protected static ClassNode` | `TYPECHECKED_CLASSNODE` |
  `protected static ClassNode[]` | `TYPECHECKING_ANNOTATIONS` |
  `protected static ClassNode` | `TYPECHECKING_INFO_NODE` |
  `protected TypeCheckingContext` | `typeCheckingContext` |

- ## Constructor Summary

  Constructors
  Constructor | Description
  --- | ---
  `StaticTypeCheckingVisitor​(SourceUnit source, ClassNode classNode)` |

- ## Method Summary

  Modifier and Type | Method | Description
  --- | --- | ---
  `protected void` | `addAmbiguousErrorMessage​(java.util.List<MethodNode> foundMethods, java.lang.String name, ClassNode[] args, Expression expr)` |
  `protected void` | `addAssignmentError​(ClassNode leftType, ClassNode rightType, Expression expression)` |
  `protected void` | `addCategoryMethodCallError​(Expression call)` |
  `protected void` | `addClosureReturnType​(ClassNode returnType)` |
  `void` | `addError​(java.lang.String msg, ASTNode expr)` |
  `protected void` | `addNoMatchingMethodError​(ClassNode receiver, java.lang.String name, ClassNode[] args, Expression call)` |
  `protected void` | `addReceivers​(java.util.List<Receiver<java.lang.String>> receivers, java.util.Collection<Receiver<java.lang.String>> owners, boolean implicitThis)` |
  `protected void` | `addStaticTypeError​(java.lang.String msg, ASTNode expr)` |
  `void` | `addTypeCheckingExtension​(TypeCheckingExtension extension)` |
  `protected void` | `addTypeCheckingInfoAnnotation​(MethodNode node)` |
  `protected void` | `addUnsupportedPreOrPostfixExpressionError​(Expression expression)` |
  `protected void` | `afterSwitchConditionExpressionVisited​(SwitchStatement statement)` |
  `protected boolean` | `areCategoryMethodCalls​(java.util.List<MethodNode> foundMethods, java.lang.String name, ClassNode[] args)` |
  `protected boolean` | `checkCast​(ClassNode targetType, Expression source)` |
  `protected void` | `checkClosureParameters​(Expression callArguments, ClassNode receiver)` | Deprecated. this method is unused, replaced with `DelegatesTo` inference.
  `protected void` | `checkForbiddenSpreadArgument​(ArgumentListExpression argumentList)` |
  `protected void` | `checkGroovyConstructorMap​(Expression receiver, ClassNode receiverType, MapExpression mapExpression)` |
  `protected void` | `checkGroovyStyleConstructor​(ClassNode node, ClassNode[] arguments)` | Deprecated. use `checkGroovyStyleConstructor(org.codehaus.groovy.ast.ClassNode, org.codehaus.groovy.ast.ClassNode[], org.codehaus.groovy.ast.ASTNode)` )}
  `protected MethodNode` | `checkGroovyStyleConstructor​(ClassNode node, ClassNode[] arguments, ASTNode origin)` | Checks that a constructor style expression is valid regarding the number of arguments and the argument types.
  `protected ClassNode` | `checkReturnType​(ReturnStatement statement)` |
  `protected void` | `collectAllInterfaceMethodsByName​(ClassNode type, java.lang.String name, java.util.List<MethodNode> methods)` | Deprecated.
  `protected boolean` | `existsProperty​(PropertyExpression pexp, boolean checkForReadOnly)` |
  `protected boolean` | `existsProperty​(PropertyExpression pexp, boolean readMode, ClassCodeVisitorSupport visitor)` | Checks whether a property exists on the receiver, or on any of the possible receiver classes (found in the temporary type information table)
  `static java.lang.String` | `extractPropertyNameFromMethodName​(java.lang.String prefix, java.lang.String methodName)` | Given a method name and a prefix, returns the name of the property that should be looked up, following the java beans rules.
  `protected java.lang.Object` | `extractTemporaryTypeInfoKey​(Expression expression)` | Computes the key to use for `TypeCheckingContext.temporaryIfBranchTypeInformation`.
  `protected static ClassNode[]` | `extractTypesFromParameters​(Parameter[] parameters)` |
  `protected ClassNode` | `findCurrentInstanceOfClass​(Expression expression, ClassNode type)` | A helper method which determines which receiver class should be used in error messages when a field or attribute is not found.
  `protected BinaryExpression` | `findInstanceOfNotReturnExpression​(IfStatement ifElse)` | Check IfStatement matched pattern : Object var1; if (!(var1 instanceOf Runnable)) { return } // Here var1 instance of Runnable
  `protected java.util.List<MethodNode>` | `findMethod​(ClassNode receiver, java.lang.String name, ClassNode... args)` |
  `protected MethodNode` | `findMethodOrFail​(Expression expr, ClassNode receiver, java.lang.String name, ClassNode... args)` |
  `protected java.util.List<MethodNode>` | `findMethodsWithGenerated​(ClassNode receiver, java.lang.String name)` | Returns methods defined for the specified receiver and adds "non-existing" methods that will be generated afterwards by the compiler; for example if a method is using default values and the class node isn't compiled yet.
  `protected BinaryExpression` | `findNotInstanceOfReturnExpression​(IfStatement ifElse)` | Check IfStatement matched pattern : Object var1; if (var1 !instanceOf Runnable) { return } // Here var1 instance of Runnable
  `protected static java.lang.String` | `formatArgumentList​(ClassNode[] nodes)` |
  `protected ClassNode[]` | `getArgumentTypes​(ArgumentListExpression args)` |
  `protected org.codehaus.groovy.transform.stc.DelegationMetadata` | `getDelegationMetadata​(ClosureExpression expression)` |
  `protected static ClassNode` | `getGroupOperationResultType​(ClassNode a, ClassNode b)` |
  `protected ClassNode` | `getInferredReturnType​(ASTNode node)` | Returns the inferred return type of a closure or method, if stored on the AST node.
  `protected ClassNode` | `getInferredReturnTypeFromWithClosureArgument​(Expression callArguments)` | In the case of a Object.with { ...
  `protected ClassNode` | `getOriginalDeclarationType​(Expression lhs)` |
  `protected ClassNode` | `getResultType​(ClassNode left, int op, ClassNode right, BinaryExpression expr)` |
  `protected SourceUnit` | `getSourceUnit()` |
  `protected java.util.List<ClassNode>` | `getTemporaryTypesForExpression​(Expression expression)` |
  `protected ClassNode` | `getType​(ASTNode exp)` |
  `protected ClassNode[]` | `getTypeCheckingAnnotations()` | Returns array of type checking annotations.
  `TypeCheckingContext` | `getTypeCheckingContext()` | Returns the current type checking context.
  `protected static boolean` | `hasRHSIncompleteGenericTypeInfo​(ClassNode inferredRightExpressionType)` | Deprecated.
  `protected void` | `inferClosureParameterTypes​(ClassNode receiver, Expression arguments, ClosureExpression expression, Parameter target, MethodNode method)` | Performs type inference on closure argument types whenever code like this is found: `foo.collect { it.toUpperCase() }`.
  `protected ClassNode` | `inferComponentType​(ClassNode containerType, ClassNode indexType)` |
  `protected void` | `inferDiamondType​(ConstructorCallExpression cce, ClassNode lType)` |
  `protected ClassNode` | `inferListExpressionType​(ListExpression list)` |
  `static ClassNode` | `inferLoopElementType​(ClassNode collectionType)` | Returns the inferred loop element type given a loop collection type.
  `protected ClassNode` | `inferMapExpressionType​(MapExpression map)` |
  `protected ClassNode` | `inferReturnTypeGenerics​(ClassNode receiver, MethodNode method, Expression arguments)` | If a method call returns a parameterized type, then perform additional inference on the return type, so that the type gets actual type arguments.
  `protected ClassNode` | `inferReturnTypeGenerics​(ClassNode receiver, MethodNode method, Expression arguments, GenericsType[] explicitTypeHints)` | If a method call returns a parameterized type, then perform additional inference on the return type, so that the type gets actual type arguments.
  `void` | `initialize()` |
  `protected static boolean` | `isClassInnerClassOrEqualTo​(ClassNode toBeChecked, ClassNode start)` |
  `protected boolean` | `isClosureCall​(java.lang.String name, Expression objectExpression, Expression arguments)` | Deprecated.
  `protected static boolean` | `isNullConstant​(Expression expression)` |
  `protected boolean` | `isSecondPassNeededForControlStructure​(java.util.Map<VariableExpression,​ClassNode> varOrigType, java.util.Map<VariableExpression,​java.util.List<ClassNode>> oldTracker)` |
  `boolean` | `isSkipMode​(AnnotatedNode node)` |
  `protected boolean` | `isSkippedInnerClass​(AnnotatedNode node)` | Tests if a node is an inner class node, and if it is, then checks if the enclosing method is skipped.
  `protected static boolean` | `isSuperExpression​(Expression expression)` |
  `protected static boolean` | `isThisExpression​(Expression expression)` |
  `protected java.util.List<Receiver<java.lang.String>>` | `makeOwnerList​(Expression objectExpression)` | Given an object expression (a message receiver expression), generate list of possible types.
  `void` | `performSecondPass()` |
  `protected java.util.Map<VariableExpression,​ClassNode>` | `popAssignmentTracking​(java.util.Map<VariableExpression,​java.util.List<ClassNode>> oldTracker)` |
  `protected static java.lang.String` | `prettyPrintMethodList​(java.util.List<MethodNode> nodes)` |
  `protected java.util.Map<VariableExpression,​java.util.List<ClassNode>>` | `pushAssignmentTracking()` |
  `protected void` | `pushInstanceOfTypeInfo​(Expression objectOfInstanceOf, Expression typeExpression)` | Stores information about types when [objectOfInstanceof instanceof typeExpression] is visited.
  `protected void` | `restoreVariableExpressionMetadata​(java.util.Map<VariableExpression,​java.util.Map<StaticTypesMarker,​java.lang.Object>> typesBeforeVisit)` |
  `protected void` | `saveVariableExpressionMetadata​(java.util.Set<VariableExpression> closureSharedExpressions, java.util.Map<VariableExpression,​java.util.Map<StaticTypesMarker,​java.lang.Object>> typesBeforeVisit)` |
  `void` | `setCompilationUnit​(CompilationUnit compilationUnit)` |
  `void` | `setMethodsToBeVisited​(java.util.Set<MethodNode> methodsToBeVisited)` |
  `protected boolean` | `shouldSkipClassNode​(ClassNode node)` |
  `protected boolean` | `shouldSkipMethodNode​(MethodNode node)` |
  `protected void` | `silentlyVisitMethodNode​(MethodNode directMethodCallCandidate)` | Visits a method call target, to infer the type.
  `protected void` | `startMethodInference​(MethodNode node, ErrorCollector collector)` |
  `protected ClassNode` | `storeInferredReturnType​(ASTNode node, ClassNode type)` | Stores the inferred return type of a closure or a method.
  `protected void` | `storeInferredTypeForPropertyExpression​(PropertyExpression pexp, ClassNode flatInferredType)` | Deprecated.
  `protected void` | `storeTargetMethod​(Expression call, MethodNode directMethodCallCandidate)` |
  `protected void` | `storeType​(Expression exp, ClassNode cn)` |
  `protected void` | `typeCheckAssignment​(BinaryExpression assignmentExpression, Expression leftExpression, ClassNode leftExpressionType, Expression rightExpression, ClassNode rightExpressionType)` |
  `protected void` | `typeCheckClosureCall​(Expression arguments, ClassNode[] argumentTypes, Parameter[] parameters)` |
  `protected MethodNode` | `typeCheckMapConstructor​(ConstructorCallExpression call, ClassNode receiver, Expression arguments)` |
  `protected boolean` | `typeCheckMethodsWithGenericsOrFail​(ClassNode receiver, ClassNode[] arguments, MethodNode candidateMethod, Expression location)` |
  `void` | `visitArrayExpression​(ArrayExpression expression)` |
  `void` | `visitAttributeExpression​(AttributeExpression expression)` |
  `void` | `visitBinaryExpression​(BinaryExpression expression)` |
  `void` | `visitBitwiseNegationExpression​(BitwiseNegationExpression expression)` |
  `void` | `visitBlockStatement​(BlockStatement block)` |
  `void` | `visitCaseStatement​(CaseStatement statement)` |
  `void` | `visitCastExpression​(CastExpression expression)` |
  `void` | `visitClass​(ClassNode node)` | Visit a ClassNode.
  `void` | `visitClassExpression​(ClassExpression expression)` |
  `void` | `visitClosingBlock​(BlockStatement block)` |
  `void` | `visitClosureExpression​(ClosureExpression expression)` |
  `void` | `visitConstructor​(ConstructorNode node)` | Visit a ConstructorNode.
  `void` | `visitConstructorCallExpression​(ConstructorCallExpression call)` |
  `protected void` | `visitConstructorOrMethod​(MethodNode node, boolean isConstructor)` |
  `void` | `visitExpressionStatement​(ExpressionStatement statement)` |
  `void` | `visitField​(FieldNode node)` | Visit a FieldNode.
  `void` | `visitForLoop​(ForStatement forLoop)` |
  `void` | `visitIfElse​(IfStatement ifElse)` |
  `protected void` | `visitInstanceofNot​(BinaryExpression be)` |
  `void` | `visitMethod​(MethodNode node)` | Visit a MethodNode.
  `protected void` | `visitMethodCallArguments​(ClassNode receiver, ArgumentListExpression arguments, boolean visitClosures, MethodNode selectedMethod)` |
  `void` | `visitMethodCallExpression​(MethodCallExpression call)` |
  `void` | `visitMethodPointerExpression​(MethodPointerExpression expression)` |
  `void` | `visitNotExpression​(NotExpression expression)` |
  `protected void` | `visitObjectInitializerStatements​(ClassNode node)` |
  `void` | `visitPostfixExpression​(PostfixExpression expression)` |
  `void` | `visitPrefixExpression​(PrefixExpression expression)` |
  `void` | `visitProperty​(PropertyNode node)` | Visit a PropertyNode.
  `void` | `visitPropertyExpression​(PropertyExpression expression)` |
  `void` | `visitRangeExpression​(RangeExpression expression)` |
  `void` | `visitReturnStatement​(ReturnStatement statement)` |
  `void` | `visitStaticMethodCallExpression​(StaticMethodCallExpression call)` |
  `void` | `visitSwitch​(SwitchStatement statement)` |
  `void` | `visitTernaryExpression​(TernaryExpression expression)` |
  `void` | `visitTryCatchFinally​(TryCatchStatement statement)` |
  `void` | `visitUnaryMinusExpression​(UnaryMinusExpression expression)` |
  `void` | `visitUnaryPlusExpression​(UnaryPlusExpression expression)` |
  `void` | `visitVariableExpression​(VariableExpression vexp)` |
  `void` | `visitWhileLoop​(WhileStatement loop)` |
  `protected static ClassNode` | `wrapTypeIfNecessary​(ClassNode type)` | Returns a wrapped type if, and only if, the provided class node is a primitive type.

  ### Methods inherited from class org.codehaus.groovy.ast.ClassCodeVisitorSupport

  `visitAnnotation, visitAnnotations, visitAssertStatement, visitBreakStatement, visitCatchStatement, visitClassCodeContainer, visitContinueStatement, visitDeclarationExpression, visitDoWhileLoop, visitImports, visitPackage, visitStatement, visitSynchronizedStatement, visitThrowStatement`

  ### Methods inherited from class org.codehaus.groovy.ast.CodeVisitorSupport

  `visitArgumentlistExpression, visitBooleanExpression, visitBytecodeExpression, visitClosureListExpression, visitConstantExpression, visitEmptyStatement, visitFieldExpression, visitGStringExpression, visitLambdaExpression, visitListExpression, visitMapEntryExpression, visitMapExpression, visitMethodReferenceExpression, visitShortTernaryExpression, visitSpreadExpression, visitSpreadMapExpression, visitTupleExpression`

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

  ### Methods inherited from interface org.codehaus.groovy.ast.GroovyCodeVisitor

  `visitEmptyExpression, visitListOfExpressions`

- ## Field Details

  - ### ERROR_COLLECTOR

    protected static final java.lang.Object ERROR_COLLECTOR

  - ### EMPTY_METHODNODE_LIST

    protected static final java.util.List<MethodNode> EMPTY_METHODNODE_LIST

  - ### TYPECHECKED_CLASSNODE

    protected static final ClassNode TYPECHECKED_CLASSNODE

  - ### TYPECHECKING_ANNOTATIONS

    protected static final ClassNode[] TYPECHECKING_ANNOTATIONS

  - ### TYPECHECKING_INFO_NODE

    protected static final ClassNode TYPECHECKING_INFO_NODE

  - ### DGM_CLASSNODE

    protected static final ClassNode DGM_CLASSNODE

  - ### CURRENT_SIGNATURE_PROTOCOL_VERSION

    protected static final int CURRENT_SIGNATURE_PROTOCOL_VERSION
    See Also:
      Constant Field Values

  - ### CURRENT_SIGNATURE_PROTOCOL

    protected static final Expression CURRENT_SIGNATURE_PROTOCOL

  - ### GET_DELEGATE

    protected static final MethodNode GET_DELEGATE

  - ### GET_OWNER

    protected static final MethodNode GET_OWNER

  - ### GET_THISOBJECT

    protected static final MethodNode GET_THISOBJECT

  - ### DELEGATES_TO

    protected static final ClassNode DELEGATES_TO

  - ### DELEGATES_TO_TARGET

    protected static final ClassNode DELEGATES_TO_TARGET

  - ### CLOSUREPARAMS_CLASSNODE

    protected static final ClassNode CLOSUREPARAMS_CLASSNODE

  - ### NAMED_PARAMS_CLASSNODE

    protected static final ClassNode NAMED_PARAMS_CLASSNODE

  - ### NAMED_PARAM_CLASSNODE

    protected static final ClassNode NAMED_PARAM_CLASSNODE

  - ### LINKEDHASHMAP_CLASSNODE

    @Deprecated protected static final ClassNode LINKEDHASHMAP_CLASSNODE
    Deprecated.

  - ### ENUMERATION_TYPE

    protected static final ClassNode ENUMERATION_TYPE

  - ### MAP_ENTRY_TYPE

    protected static final ClassNode MAP_ENTRY_TYPE

  - ### ITERABLE_TYPE

    protected static final ClassNode ITERABLE_TYPE

  - ### CLOSURE_CALL_NO_ARG

    public static final MethodNode CLOSURE_CALL_NO_ARG

  - ### CLOSURE_CALL_ONE_ARG

    public static final MethodNode CLOSURE_CALL_ONE_ARG

  - ### CLOSURE_CALL_VARGS

    public static final MethodNode CLOSURE_CALL_VARGS

  - ### GENERATED_EMPTY_STATEMENT

    public static final Statement GENERATED_EMPTY_STATEMENT

  - ### returnListener

    protected final ReturnAdder.ReturnStatementListener returnListener

  - ### returnAdder

    protected final ReturnAdder returnAdder

  - ### currentField

    protected FieldNode currentField

  - ### currentProperty

    protected PropertyNode currentProperty

  - ### extension

    protected DefaultTypeCheckingExtension extension

  - ### typeCheckingContext

    protected TypeCheckingContext typeCheckingContext

- ## Constructor Details

  - ### StaticTypeCheckingVisitor

    public StaticTypeCheckingVisitor​(SourceUnit source, ClassNode classNode)

- ## Method Details

  - ### getSourceUnit

    protected SourceUnit getSourceUnit()
    Specified by:
      `getSourceUnit` in class `ClassCodeVisitorSupport`

  - ### initialize

    public void initialize()

  - ### getTypeCheckingContext

    public TypeCheckingContext getTypeCheckingContext()
    Returns the current type checking context. The context is used internally by the type checker during type checking to store various state data.
    Returns:
      the type checking context

  - ### addTypeCheckingExtension

    public void addTypeCheckingExtension​(TypeCheckingExtension extension)

  - ### setCompilationUnit

    public void setCompilationUnit​(CompilationUnit compilationUnit)

  - ### visitClass

    public void visitClass​(ClassNode node)
    Description copied from interface: `GroovyClassVisitor`
    Visit a ClassNode.
    Specified by:
      `visitClass` in interface `GroovyClassVisitor`
    Overrides:
      `visitClass` in class `ClassCodeVisitorSupport`

  - ### getTypeCheckingAnnotations

    protected ClassNode[] getTypeCheckingAnnotations()
    Returns array of type checking annotations. Subclasses may override this method in order to provide additional types which must be looked up when checking if a method or a class node should be skipped.

    The default implementation returns `TypeChecked`.

  - ### shouldSkipClassNode

    protected boolean shouldSkipClassNode​(ClassNode node)

  - ### isSkipMode

    public boolean isSkipMode​(AnnotatedNode node)

  - ### isSkippedInnerClass

    protected boolean isSkippedInnerClass​(AnnotatedNode node)
    Tests if a node is an inner class node, and if it is, then checks if the enclosing method is skipped.
    Returns:
      true if the inner class node should be skipped

  - ### visitClassExpression

    public void visitClassExpression​(ClassExpression expression)
    Specified by:
      `visitClassExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitClassExpression` in class `CodeVisitorSupport`

  - ### visitVariableExpression

    public void visitVariableExpression​(VariableExpression vexp)
    Specified by:
      `visitVariableExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitVariableExpression` in class `CodeVisitorSupport`

  - ### visitPropertyExpression

    public void visitPropertyExpression​(PropertyExpression expression)
    Specified by:
      `visitPropertyExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitPropertyExpression` in class `CodeVisitorSupport`

  - ### visitAttributeExpression

    public void visitAttributeExpression​(AttributeExpression expression)
    Specified by:
      `visitAttributeExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitAttributeExpression` in class `CodeVisitorSupport`

  - ### visitRangeExpression

    public void visitRangeExpression​(RangeExpression expression)
    Specified by:
      `visitRangeExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitRangeExpression` in class `CodeVisitorSupport`

  - ### visitNotExpression

    public void visitNotExpression​(NotExpression expression)
    Specified by:
      `visitNotExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitNotExpression` in class `CodeVisitorSupport`

  - ### visitBinaryExpression

    public void visitBinaryExpression​(BinaryExpression expression)
    Specified by:
      `visitBinaryExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitBinaryExpression` in class `CodeVisitorSupport`

  - ### getOriginalDeclarationType

    protected ClassNode getOriginalDeclarationType​(Expression lhs)

  - ### inferDiamondType

    protected void inferDiamondType​(ConstructorCallExpression cce, ClassNode lType)

  - ### typeCheckAssignment

    protected void typeCheckAssignment​(BinaryExpression assignmentExpression, Expression leftExpression, ClassNode leftExpressionType, Expression rightExpression, ClassNode rightExpressionType)

  - ### checkGroovyConstructorMap

    protected void checkGroovyConstructorMap​(Expression receiver, ClassNode receiverType, MapExpression mapExpression)

  - ### hasRHSIncompleteGenericTypeInfo

    @Deprecated protected static boolean hasRHSIncompleteGenericTypeInfo​(ClassNode inferredRightExpressionType)
    Deprecated.

  - ### checkGroovyStyleConstructor

    @Deprecated protected void checkGroovyStyleConstructor​(ClassNode node, ClassNode[] arguments)
    Deprecated.
    use `checkGroovyStyleConstructor(org.codehaus.groovy.ast.ClassNode, org.codehaus.groovy.ast.ClassNode[], org.codehaus.groovy.ast.ASTNode)` )}
    Checks that a constructor style expression is valid regarding the number of arguments and the argument types.
    Parameters:
      `node` - the class node for which we will try to find a matching constructor
      `arguments` - the constructor arguments

  - ### checkGroovyStyleConstructor

    protected MethodNode checkGroovyStyleConstructor​(ClassNode node, ClassNode[] arguments, ASTNode origin)
    Checks that a constructor style expression is valid regarding the number of arguments and the argument types.
    Parameters:
      `node` - the class node for which we will try to find a matching constructor
      `arguments` - the constructor arguments

  - ### existsProperty

    protected boolean existsProperty​(PropertyExpression pexp, boolean checkForReadOnly)

  - ### existsProperty

    protected boolean existsProperty​(PropertyExpression pexp, boolean readMode, ClassCodeVisitorSupport visitor)
    Checks whether a property exists on the receiver, or on any of the possible receiver classes (found in the temporary type information table)
    Parameters:
      `pexp` - a property expression
      `readMode` - if true, look for property read, else for property set
      `visitor` - if not null, when the property node is found, visit it with the provided visitor
    Returns:
      true if the property is defined in any of the possible receiver classes

  - ### storeInferredTypeForPropertyExpression

    @Deprecated protected void storeInferredTypeForPropertyExpression​(PropertyExpression pexp, ClassNode flatInferredType)
    Deprecated.

  - ### visitProperty

    public void visitProperty​(PropertyNode node)
    Description copied from interface: `GroovyClassVisitor`
    Visit a PropertyNode.
    Specified by:
      `visitProperty` in interface `GroovyClassVisitor`
    Overrides:
      `visitProperty` in class `ClassCodeVisitorSupport`

  - ### visitField

    public void visitField​(FieldNode node)
    Description copied from interface: `GroovyClassVisitor`
    Visit a FieldNode.
    Specified by:
      `visitField` in interface `GroovyClassVisitor`
    Overrides:
      `visitField` in class `ClassCodeVisitorSupport`

  - ### visitForLoop

    public void visitForLoop​(ForStatement forLoop)
    Specified by:
      `visitForLoop` in interface `GroovyCodeVisitor`
    Overrides:
      `visitForLoop` in class `ClassCodeVisitorSupport`

  - ### inferLoopElementType

    public static ClassNode inferLoopElementType​(ClassNode collectionType)
    Returns the inferred loop element type given a loop collection type. Used, for example, to infer the element type of a `for (e in list)` loop.
    Parameters:
      `collectionType` - the type of the collection
    Returns:
      the inferred component type
    See Also:
      `inferComponentType(org.codehaus.groovy.ast.ClassNode, org.codehaus.groovy.ast.ClassNode)`

  - ### isSecondPassNeededForControlStructure

    protected boolean isSecondPassNeededForControlStructure​(java.util.Map<VariableExpression,​ClassNode> varOrigType, java.util.Map<VariableExpression,​java.util.List<ClassNode>> oldTracker)

  - ### visitWhileLoop

    public void visitWhileLoop​(WhileStatement loop)
    Specified by:
      `visitWhileLoop` in interface `GroovyCodeVisitor`
    Overrides:
      `visitWhileLoop` in class `ClassCodeVisitorSupport`

  - ### visitBitwiseNegationExpression

    public void visitBitwiseNegationExpression​(BitwiseNegationExpression expression)
    Specified by:
      `visitBitwiseNegationExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitBitwiseNegationExpression` in class `CodeVisitorSupport`

  - ### visitUnaryPlusExpression

    public void visitUnaryPlusExpression​(UnaryPlusExpression expression)
    Specified by:
      `visitUnaryPlusExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitUnaryPlusExpression` in class `CodeVisitorSupport`

  - ### visitUnaryMinusExpression

    public void visitUnaryMinusExpression​(UnaryMinusExpression expression)
    Specified by:
      `visitUnaryMinusExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitUnaryMinusExpression` in class `CodeVisitorSupport`

  - ### visitPostfixExpression

    public void visitPostfixExpression​(PostfixExpression expression)
    Specified by:
      `visitPostfixExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitPostfixExpression` in class `CodeVisitorSupport`

  - ### visitPrefixExpression

    public void visitPrefixExpression​(PrefixExpression expression)
    Specified by:
      `visitPrefixExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitPrefixExpression` in class `CodeVisitorSupport`

  - ### visitConstructorOrMethod

    protected void visitConstructorOrMethod​(MethodNode node, boolean isConstructor)
    Overrides:
      `visitConstructorOrMethod` in class `ClassCodeVisitorSupport`

  - ### visitExpressionStatement

    public void visitExpressionStatement​(ExpressionStatement statement)
    Specified by:
      `visitExpressionStatement` in interface `GroovyCodeVisitor`
    Overrides:
      `visitExpressionStatement` in class `ClassCodeVisitorSupport`

  - ### visitReturnStatement

    public void visitReturnStatement​(ReturnStatement statement)
    Specified by:
      `visitReturnStatement` in interface `GroovyCodeVisitor`
    Overrides:
      `visitReturnStatement` in class `ClassCodeVisitorSupport`

  - ### checkReturnType

    protected ClassNode checkReturnType​(ReturnStatement statement)

  - ### addClosureReturnType

    protected void addClosureReturnType​(ClassNode returnType)

  - ### visitConstructorCallExpression

    public void visitConstructorCallExpression​(ConstructorCallExpression call)
    Specified by:
      `visitConstructorCallExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitConstructorCallExpression` in class `CodeVisitorSupport`

  - ### typeCheckMapConstructor

    protected MethodNode typeCheckMapConstructor​(ConstructorCallExpression call, ClassNode receiver, Expression arguments)

  - ### getArgumentTypes

    protected ClassNode[] getArgumentTypes​(ArgumentListExpression args)

  - ### visitClosureExpression

    public void visitClosureExpression​(ClosureExpression expression)
    Specified by:
      `visitClosureExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitClosureExpression` in class `CodeVisitorSupport`

  - ### visitMethodPointerExpression

    public void visitMethodPointerExpression​(MethodPointerExpression expression)
    Specified by:
      `visitMethodPointerExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitMethodPointerExpression` in class `CodeVisitorSupport`

  - ### getDelegationMetadata

    protected org.codehaus.groovy.transform.stc.DelegationMetadata getDelegationMetadata​(ClosureExpression expression)

  - ### restoreVariableExpressionMetadata

    protected void restoreVariableExpressionMetadata​(java.util.Map<VariableExpression,​java.util.Map<StaticTypesMarker,​java.lang.Object>> typesBeforeVisit)

  - ### saveVariableExpressionMetadata

    protected void saveVariableExpressionMetadata​(java.util.Set<VariableExpression> closureSharedExpressions, java.util.Map<VariableExpression,​java.util.Map<StaticTypesMarker,​java.lang.Object>> typesBeforeVisit)

  - ### shouldSkipMethodNode

    protected boolean shouldSkipMethodNode​(MethodNode node)

  - ### visitMethod

    public void visitMethod​(MethodNode node)
    Description copied from interface: `GroovyClassVisitor`
    Visit a MethodNode.
    Specified by:
      `visitMethod` in interface `GroovyClassVisitor`
    Overrides:
      `visitMethod` in class `ClassCodeVisitorSupport`

  - ### visitConstructor

    public void visitConstructor​(ConstructorNode node)
    Description copied from interface: `GroovyClassVisitor`
    Visit a ConstructorNode.
    Specified by:
      `visitConstructor` in interface `GroovyClassVisitor`
    Overrides:
      `visitConstructor` in class `ClassCodeVisitorSupport`

  - ### startMethodInference

    protected void startMethodInference​(MethodNode node, ErrorCollector collector)

  - ### visitObjectInitializerStatements

    protected void visitObjectInitializerStatements​(ClassNode node)
    Overrides:
      `visitObjectInitializerStatements` in class `ClassCodeVisitorSupport`

  - ### addTypeCheckingInfoAnnotation

    protected void addTypeCheckingInfoAnnotation​(MethodNode node)

  - ### visitStaticMethodCallExpression

    public void visitStaticMethodCallExpression​(StaticMethodCallExpression call)
    Specified by:
      `visitStaticMethodCallExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitStaticMethodCallExpression` in class `CodeVisitorSupport`

  - ### checkClosureParameters

    @Deprecated protected void checkClosureParameters​(Expression callArguments, ClassNode receiver)
    Deprecated.
    this method is unused, replaced with `DelegatesTo` inference.

  - ### silentlyVisitMethodNode

    protected void silentlyVisitMethodNode​(MethodNode directMethodCallCandidate)
    Visits a method call target, to infer the type. Don't report errors right away, that will be done by a later visitMethod call.

  - ### visitMethodCallArguments

    protected void visitMethodCallArguments​(ClassNode receiver, ArgumentListExpression arguments, boolean visitClosures, MethodNode selectedMethod)

  - ### inferClosureParameterTypes

    protected void inferClosureParameterTypes​(ClassNode receiver, Expression arguments, ClosureExpression expression, Parameter target, MethodNode method)
    Performs type inference on closure argument types whenever code like this is found: `foo.collect { it.toUpperCase() }`.

    In this case the type checker tries to find if the `collect` method has its `Closure` argument annotated with `ClosureParams`. If so, then additional type inference can be performed and the type of `it` may be inferred.

    Parameters:
      `receiver` -
      `arguments` -
      `expression` - closure or lambda expression for which the argument types should be inferred
      `target` - parameter which may provide `ClosureParams` annotation or SAM type
      `method` - method that declares `target`

  - ### addReceivers

    protected void addReceivers​(java.util.List<Receiver<java.lang.String>> receivers, java.util.Collection<Receiver<java.lang.String>> owners, boolean implicitThis)

  - ### visitMethodCallExpression

    public void visitMethodCallExpression​(MethodCallExpression call)
    Specified by:
      `visitMethodCallExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitMethodCallExpression` in class `CodeVisitorSupport`

  - ### getInferredReturnTypeFromWithClosureArgument

    protected ClassNode getInferredReturnTypeFromWithClosureArgument​(Expression callArguments)
    In the case of a Object.with { ... } call, this method is supposed to retrieve the inferred closure return type.
    Parameters:
      `callArguments` - the argument list from the Object#with(Closure) call, ie. a single closure expression
    Returns:
      the inferred closure return type or null

  - ### makeOwnerList

    protected java.util.List<Receiver<java.lang.String>> makeOwnerList​(Expression objectExpression)
    Given an object expression (a message receiver expression), generate list of possible types.
    Parameters:
      `objectExpression` - the receiver expression
    Returns:
      the list of types the receiver may be

  - ### checkForbiddenSpreadArgument

    protected void checkForbiddenSpreadArgument​(ArgumentListExpression argumentList)

  - ### storeTargetMethod

    protected void storeTargetMethod​(Expression call, MethodNode directMethodCallCandidate)

  - ### isClosureCall

    @Deprecated protected boolean isClosureCall​(java.lang.String name, Expression objectExpression, Expression arguments)
    Deprecated.

  - ### typeCheckClosureCall

    protected void typeCheckClosureCall​(Expression arguments, ClassNode[] argumentTypes, Parameter[] parameters)

  - ### visitIfElse

    public void visitIfElse​(IfStatement ifElse)
    Specified by:
      `visitIfElse` in interface `GroovyCodeVisitor`
    Overrides:
      `visitIfElse` in class `ClassCodeVisitorSupport`

  - ### visitInstanceofNot

    protected void visitInstanceofNot​(BinaryExpression be)

  - ### visitBlockStatement

    public void visitBlockStatement​(BlockStatement block)
    Specified by:
      `visitBlockStatement` in interface `GroovyCodeVisitor`
    Overrides:
      `visitBlockStatement` in class `ClassCodeVisitorSupport`

  - ### visitClosingBlock

    public void visitClosingBlock​(BlockStatement block)

  - ### findInstanceOfNotReturnExpression

    protected BinaryExpression findInstanceOfNotReturnExpression​(IfStatement ifElse)
    Check IfStatement matched pattern : Object var1; if (!(var1 instanceOf Runnable)) { return } // Here var1 instance of Runnable

    Return expression , which contains instanceOf (without not) Return null, if not found

  - ### findNotInstanceOfReturnExpression

    protected BinaryExpression findNotInstanceOfReturnExpression​(IfStatement ifElse)
    Check IfStatement matched pattern : Object var1; if (var1 !instanceOf Runnable) { return } // Here var1 instance of Runnable

    Return expression , which contains instanceOf (without not) Return null, if not found

  - ### visitSwitch

    public void visitSwitch​(SwitchStatement statement)
    Specified by:
      `visitSwitch` in interface `GroovyCodeVisitor`
    Overrides:
      `visitSwitch` in class `ClassCodeVisitorSupport`

  - ### afterSwitchConditionExpressionVisited

    protected void afterSwitchConditionExpressionVisited​(SwitchStatement statement)
    Overrides:
      `afterSwitchConditionExpressionVisited` in class `CodeVisitorSupport`

  - ### visitCaseStatement

    public void visitCaseStatement​(CaseStatement statement)
    Specified by:
      `visitCaseStatement` in interface `GroovyCodeVisitor`
    Overrides:
      `visitCaseStatement` in class `ClassCodeVisitorSupport`

  - ### popAssignmentTracking

    protected java.util.Map<VariableExpression,​ClassNode> popAssignmentTracking​(java.util.Map<VariableExpression,​java.util.List<ClassNode>> oldTracker)

  - ### pushAssignmentTracking

    protected java.util.Map<VariableExpression,​java.util.List<ClassNode>> pushAssignmentTracking()

  - ### visitArrayExpression

    public void visitArrayExpression​(ArrayExpression expression)
    Specified by:
      `visitArrayExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitArrayExpression` in class `CodeVisitorSupport`

  - ### visitCastExpression

    public void visitCastExpression​(CastExpression expression)
    Specified by:
      `visitCastExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitCastExpression` in class `CodeVisitorSupport`

  - ### checkCast

    protected boolean checkCast​(ClassNode targetType, Expression source)

  - ### visitTernaryExpression

    public void visitTernaryExpression​(TernaryExpression expression)
    Specified by:
      `visitTernaryExpression` in interface `GroovyCodeVisitor`
    Overrides:
      `visitTernaryExpression` in class `CodeVisitorSupport`

  - ### visitTryCatchFinally

    public void visitTryCatchFinally​(TryCatchStatement statement)
    Specified by:
      `visitTryCatchFinally` in interface `GroovyCodeVisitor`
    Overrides:
      `visitTryCatchFinally` in class `ClassCodeVisitorSupport`

  - ### storeType

    protected void storeType​(Expression exp, ClassNode cn)

  - ### getResultType

    protected ClassNode getResultType​(ClassNode left, int op, ClassNode right, BinaryExpression expr)

  - ### getGroupOperationResultType

    protected static ClassNode getGroupOperationResultType​(ClassNode a, ClassNode b)

  - ### inferComponentType

    protected ClassNode inferComponentType​(ClassNode containerType, ClassNode indexType)

  - ### findMethodOrFail

    protected MethodNode findMethodOrFail​(Expression expr, ClassNode receiver, java.lang.String name, ClassNode... args)

  - ### prettyPrintMethodList

    protected static java.lang.String prettyPrintMethodList​(java.util.List<MethodNode> nodes)

  - ### areCategoryMethodCalls

    protected boolean areCategoryMethodCalls​(java.util.List<MethodNode> foundMethods, java.lang.String name, ClassNode[] args)

  - ### findMethodsWithGenerated

    protected java.util.List<MethodNode> findMethodsWithGenerated​(ClassNode receiver, java.lang.String name)
    Returns methods defined for the specified receiver and adds "non-existing" methods that will be generated afterwards by the compiler; for example if a method is using default values and the class node isn't compiled yet.
    Parameters:
      `receiver` - the receiver where to find methods
      `name` - the name of the methods to return
    Returns:
      the methods that are defined on the receiver completed with stubs for future methods

  - ### findMethod

    protected java.util.List<MethodNode> findMethod​(ClassNode receiver, java.lang.String name, ClassNode... args)

  - ### extractPropertyNameFromMethodName

    public static java.lang.String extractPropertyNameFromMethodName​(java.lang.String prefix, java.lang.String methodName)
    Given a method name and a prefix, returns the name of the property that should be looked up, following the java beans rules. For example, "getName" would return "name", while "getFullName" would return "fullName". If the prefix is not found, returns null.
    Parameters:
      `prefix` - the method name prefix ("get", "is", "set", ...)
      `methodName` - the method name
    Returns:
      a property name if the prefix is found and the method matches the java beans rules, null otherwise

  - ### collectAllInterfaceMethodsByName

    @Deprecated protected void collectAllInterfaceMethodsByName​(ClassNode type, java.lang.String name, java.util.List<MethodNode> methods)
    Deprecated.

  - ### getType

    protected ClassNode getType​(ASTNode exp)

  - ### storeInferredReturnType

    protected ClassNode storeInferredReturnType​(ASTNode node, ClassNode type)
    Stores the inferred return type of a closure or a method. We are using a separate key to store inferred return type because the inferred type of a closure is `Closure`, which is different from the inferred type of the code of the closure.
    Parameters:
      `node` - a `ClosureExpression` or a `MethodNode`
      `type` - the inferred return type of the code
    Returns:
      the old value of the inferred type

  - ### getInferredReturnType

    protected ClassNode getInferredReturnType​(ASTNode node)
    Returns the inferred return type of a closure or method, if stored on the AST node. This method doesn't perform any type inference by itself.
    Parameters:
      `node` - a `ClosureExpression` or `MethodNode`
    Returns:
      the expected return type

  - ### isNullConstant

    protected static boolean isNullConstant​(Expression expression)

  - ### isThisExpression

    protected static boolean isThisExpression​(Expression expression)

  - ### isSuperExpression

    protected static boolean isSuperExpression​(Expression expression)

  - ### inferListExpressionType

    protected ClassNode inferListExpressionType​(ListExpression list)

  - ### inferMapExpressionType

    protected ClassNode inferMapExpressionType​(MapExpression map)

  - ### inferReturnTypeGenerics

    protected ClassNode inferReturnTypeGenerics​(ClassNode receiver, MethodNode method, Expression arguments)
    If a method call returns a parameterized type, then perform additional inference on the return type, so that the type gets actual type arguments. For example, the method `Arrays.asList(T...)` is parameterized with `T`, which can be deduced type arguments or call arguments.
    Parameters:
      `method` - the method node
      `arguments` - the method call arguments
      `receiver` - the object expression type

  - ### inferReturnTypeGenerics

    protected ClassNode inferReturnTypeGenerics​(ClassNode receiver, MethodNode method, Expression arguments, GenericsType[] explicitTypeHints)
    If a method call returns a parameterized type, then perform additional inference on the return type, so that the type gets actual type arguments. For example, the method `Arrays.asList(T...)` is parameterized with `T`, which can be deduced type arguments or call arguments.
    Parameters:
      `method` - the method node
      `arguments` - the method call arguments
      `receiver` - the object expression type
      `explicitTypeHints` - type arguments (optional), for example `Collections.<String>emptyList()`

  - ### typeCheckMethodsWithGenericsOrFail

    protected boolean typeCheckMethodsWithGenericsOrFail​(ClassNode receiver, ClassNode[] arguments, MethodNode candidateMethod, Expression location)

  - ### formatArgumentList

    protected static java.lang.String formatArgumentList​(ClassNode[] nodes)

  - ### addError

    public void addError​(java.lang.String msg, ASTNode expr)
    Specified by:
      `addError` in interface `ErrorCollecting`
    Overrides:
      `addError` in class `ClassCodeVisitorSupport`

  - ### addStaticTypeError

    protected void addStaticTypeError​(java.lang.String msg, ASTNode expr)

  - ### addNoMatchingMethodError

    protected void addNoMatchingMethodError​(ClassNode receiver, java.lang.String name, ClassNode[] args, Expression call)

  - ### addAmbiguousErrorMessage

    protected void addAmbiguousErrorMessage​(java.util.List<MethodNode> foundMethods, java.lang.String name, ClassNode[] args, Expression expr)

  - ### addCategoryMethodCallError

    protected void addCategoryMethodCallError​(Expression call)

  - ### addAssignmentError

    protected void addAssignmentError​(ClassNode leftType, ClassNode rightType, Expression expression)

  - ### addUnsupportedPreOrPostfixExpressionError

    protected void addUnsupportedPreOrPostfixExpressionError​(Expression expression)

  - ### setMethodsToBeVisited

    public void setMethodsToBeVisited​(java.util.Set<MethodNode> methodsToBeVisited)

  - ### performSecondPass

    public void performSecondPass()

  - ### extractTypesFromParameters

    protected static ClassNode[] extractTypesFromParameters​(Parameter[] parameters)

  - ### wrapTypeIfNecessary

    protected static ClassNode wrapTypeIfNecessary​(ClassNode type)
    Returns a wrapped type if, and only if, the provided class node is a primitive type. This method differs from `ClassHelper.getWrapper(org.codehaus.groovy.ast.ClassNode)` as it will return the same instance if the provided type is not a generic type.
    Returns:
      the wrapped type

  - ### isClassInnerClassOrEqualTo

    protected static boolean isClassInnerClassOrEqualTo​(ClassNode toBeChecked, ClassNode start)

  - ### pushInstanceOfTypeInfo

    protected void pushInstanceOfTypeInfo​(Expression objectOfInstanceOf, Expression typeExpression)
    Stores information about types when [objectOfInstanceof instanceof typeExpression] is visited.
    Parameters:
      `objectOfInstanceOf` - the expression to be checked against instanceof
      `typeExpression` - the expression which represents the target type

  - ### extractTemporaryTypeInfoKey

    protected java.lang.Object extractTemporaryTypeInfoKey​(Expression expression)
    Computes the key to use for `TypeCheckingContext.temporaryIfBranchTypeInformation`.

  - ### findCurrentInstanceOfClass

    protected ClassNode findCurrentInstanceOfClass​(Expression expression, ClassNode type)
    A helper method which determines which receiver class should be used in error messages when a field or attribute is not found. The returned type class depends on whether we have temporary type information available (due to instanceof checks) and whether there is a single candidate in that case.
    Parameters:
      `expression` - the expression for which an unknown field has been found
      `type` - the type of the expression (used as fallback type)
    Returns:
      if temporary information is available and there's only one type, returns the temporary type class otherwise falls back to the provided type class.

  - ### getTemporaryTypesForExpression

    protected java.util.List<ClassNode> getTemporaryTypesForExpression​(Expression expression)