AstVisitor.class.ps1

using namespace System.Collections.Generic
using namespace System.Management.Automation.Language

#region AstVisitor
class PSPVisitor : ICustomAstVisitor,ICustomAstVisitor2
{
    [Profiler]$Profiler = $null
    PSPVisitor([Profiler]$profiler) {
        $this.Profiler = $profiler
    }
    [Object] VisitElement([object]$element) {
        if ($element -eq $null) {
            return $null
        }
        $res = $element.Visit($this)
        return $res
    }
    [Object] VisitElements([Object]$elements) {
            if ($elements -eq $null -or $elements.Count -eq 0)
            {
                return $null
            }
            $typeName = $elements.gettype().GenericTypeArguments.Fullname

            $newElements = New-Object -TypeName "System.Collections.Generic.List[$typeName]"
            foreach($element in $elements) {
                $visitedResult = $element.Visit($this)
                $newElements.add($visitedResult)
            }
            return $newElements 
    }
    [StatementAst[]] VisitStatements([object]$Statements)
    {
            $newStatements = [List[StatementAst]]::new()
            foreach ($statement in $statements)
            {
                [bool]$instrument = $statement -is [PipelineBaseAst]
                $extent = $statement.Extent
                if ($instrument)
                {
                    $expressionAstCollection = [List[ExpressionAst]]::new()
                    $constantExpression = [ConstantExpressionAst]::new($extent, $extent.StartLineNumber - 1)
                    $expressionAstCollection.Add($constantExpression)
                    $constantProfiler = [ConstantExpressionAst]::new($extent, $this.Profiler)
                    $constantStartline = [StringConstantExpressionAst]::new($extent, "StartLine", [StringConstantType]::BareWord)
                    $invokeMember = [InvokeMemberExpressionAst]::new(
                            $extent,
                            $constantProfiler,
                            $constantStartline,
                            $expressionAstCollection,
                            $false
                        )
                    $startLine = [CommandExpressionAst]::new(
                        $extent, 
                        $invokeMember, 
                        $null
                    )
                    $pipe = [PipelineAst]::new($extent, $startLine);
                    $newStatements.Add($pipe)
                }
                $newStatements.Add($this.VisitElement($statement))
                if ($instrument)
                {
                    $expressionAstCollection = [List[ExpressionAst]]::new()
                    $expressionAstCollection.Add([ConstantExpressionAst]::new($extent, $extent.StartLineNumber - 1))
                    $endLine = [CommandExpressionAst]::new(
                        $extent, 
                        [InvokeMemberExpressionAst]::new(
                            $extent,
                            [ConstantExpressionAst]::new($extent, $this.Profiler),
                            [StringConstantExpressionAst]::new($extent, "EndLine", [StringConstantType]::BareWord),
                            $expressionAstCollection, 
                            $false
                        ), 
                        $null
                    )
                    $pipe = [PipelineAst]::new($extent, $endLine)
                    $newStatements.add($pipe)
                }
            }
            return $newStatements
        }

    [object] VisitScriptBlock([ScriptBlockAst] $scriptBlockAst)
    {
        $newParamBlock = $this.VisitElement($scriptBlockAst.ParamBlock)
        $newBeginBlock = $this.VisitElement($scriptBlockAst.BeginBlock)
        $newProcessBlock = $this.VisitElement($scriptBlockAst.ProcessBlock)
        $newEndBlock = $this.VisitElement($scriptBlockAst.EndBlock)
        $newDynamicParamBlock = $this.VisitElement($scriptBlockAst.DynamicParamBlock)
        return [ScriptBlockAst]::new($scriptBlockAst.Extent, $newParamBlock, $newBeginBlock, $newProcessBlock, $newEndBlock, $newDynamicParamBlock)
    }


    [object] VisitNamedBlock([NamedBlockAst] $namedBlockAst)
    {
        $newTraps = $this.VisitElements($namedBlockAst.Traps)
        $newStatements = $this.VisitStatements($namedBlockAst.Statements)
        $statementBlock = [StatementBlockAst]::new($namedBlockAst.Extent,$newStatements,$newTraps)
        return [NamedBlockAst]::new($namedBlockAst.Extent, $namedBlockAst.BlockKind, $statementBlock, $namedBlockAst.Unnamed)
    }

    [object] VisitFunctionDefinition([FunctionDefinitionAst] $functionDefinitionAst)
    {
        $newBody = $this.VisitElement($functionDefinitionAst.Body)
        return [FunctionDefinitionAst]::new($functionDefinitionAst.Extent, $functionDefinitionAst.IsFilter,$functionDefinitionAst.IsWorkflow, $functionDefinitionAst.Name, $this.VisitElements($functionDefinitionAst.Parameters), $newBody);
    }

    [object] VisitStatementBlock([StatementBlockAst] $statementBlockAst)
    {
        $newStatements = $this.VisitStatements($statementBlockAst.Statements)
        $newTraps = $this.VisitElements($statementBlockAst.Traps)
        return [StatementBlockAst]::new($statementBlockAst.Extent, $newStatements, $newTraps)
    }

    [object] VisitIfStatement([IfStatementAst] $ifStmtAst)
    {
        [Tuple[PipelineBaseAst,StatementBlockAst][]]$newClauses = @(foreach($clause in $ifStmtAst.Clauses){
            $newClauseTest = [PipelineBaseAst]$this.VisitElement($clause.Item1)
            $newStatementBlock = [StatementBlockAst]$this.VisitElement($clause.Item2)
            [Tuple[PipelineBaseAst,StatementBlockAst]]::new($newClauseTest,$newStatementBlock)
        })
        $newElseClause = $this.VisitElement($ifStmtAst.ElseClause)
        return [IfStatementAst]::new($ifStmtAst.Extent, $newClauses, $newElseClause)
    }

    [object] VisitTrap([TrapStatementAst] $trapStatementAst)
    {
        return [TrapStatementAst]::new($trapStatementAst.Extent, $this.VisitElement($trapStatementAst.TrapType), $this.VisitElement($trapStatementAst.Body))
    }

    [object] VisitSwitchStatement([SwitchStatementAst] $switchStatementAst)
    {
        $newCondition = $this.VisitElement($switchStatementAst.Condition)
        $newClauses = [List[Tuple[ExpressionAst,StatementBlockAst]]]::new()
        $switchStatementAst.Clauses | ForEach-Object {
            $newClauseTest = $this.VisitElement($_.Item1)
            $newStatementBlock = $this.VisitElement($_.Item2)
            $newClauses.Add([Tuple[ExpressionAst,StatementBlockAst]]::new($newClauseTest,$newStatementBlock))
        }
        $newDefault = $this.VisitElement($switchStatementAst.Default)
        return [SwitchStatementAst]::new($switchStatementAst.Extent, $switchStatementAst.Label,$newCondition,$switchStatementAst.Flags, $newClauses, $newDefault)
    }

    [object] VisitDataStatement([DataStatementAst] $dataStatementAst)
    {
        $newBody = $this.VisitElement($dataStatementAst.Body)
        $newCommandsAllowed = $this.VisitElements($dataStatementAst.CommandsAllowed)
        return [DataStatementAst]::new($dataStatementAst.Extent, $dataStatementAst.Variable, $newCommandsAllowed, $newBody)
    }

    [object] VisitForEachStatement([ForEachStatementAst] $forEachStatementAst)
    {
        $newVariable = $this.VisitElement($forEachStatementAst.Variable)
        $newCondition = $this.VisitElement($forEachStatementAst.Condition)
        $newBody = $this.VisitElement($forEachStatementAst.Body)
        return [ForEachStatementAst]::new($forEachStatementAst.Extent, $forEachStatementAst.Label, [ForEachFlags]::None, $newVariable, $newCondition, $newBody)
    }

    [object] VisitDoWhileStatement([DoWhileStatementAst] $doWhileStatementAst)
    {
        $newCondition = $this.VisitElement($doWhileStatementAst.Condition)
        $newBody = $this.VisitElement($doWhileStatementAst.Body)
        return [DoWhileStatementAst]::new($doWhileStatementAst.Extent, $doWhileStatementAst.Label, $newCondition, $newBody)
    }

    [object] VisitForStatement([ForStatementAst] $forStatementAst)
    {
        $newInitializer = $this.VisitElement($forStatementAst.Initializer)
        $newCondition = $this.VisitElement($forStatementAst.Condition)
        $newIterator = $this.VisitElement($forStatementAst.Iterator)
        $newBody = $this.VisitElement($forStatementAst.Body)
        return [ForStatementAst]::new($forStatementAst.Extent, $forStatementAst.Label, $newInitializer, $newCondition, $newIterator, $newBody)
    }

    [object] VisitWhileStatement([WhileStatementAst] $whileStatementAst)
    {
        $newCondition = $this.VisitElement($whileStatementAst.Condition)
        $newBody = $this.VisitElement($whileStatementAst.Body)
        return [WhileStatementAst]::new($whileStatementAst.Extent, $whileStatementAst.Label, $newCondition, $newBody)
    }

    [object] VisitCatchClause([CatchClauseAst] $catchClauseAst)
    {
        $newBody = $this.VisitElement($catchClauseAst.Body)
        $newCatchTypes = $this.VisitElements($catchClauseAst.CatchTypes)
        return [CatchClauseAst]::new($catchClauseAst.Extent, $newCatchTypes, $newBody)
    }

    [object] VisitTryStatement([TryStatementAst] $tryStatementAst)
    {
        $newBody = $this.VisitElement($tryStatementAst.Body)
        $newCatchClauses = $this.VisitElements($tryStatementAst.CatchClauses)
        $newFinally = $this.VisitElement($tryStatementAst.Finally)
        return [TryStatementAst]::new($tryStatementAst.Extent, $newBody, $newCatchClauses, $newFinally)
    }

    [object] VisitDoUntilStatement([DoUntilStatementAst] $doUntilStatementAst)
    {
        $newCondition = $this.VisitElement($doUntilStatementAst.Condition)
        $newBody = $this.VisitElement($doUntilStatementAst.Body)
        return [DoUntilStatementAst]::new($doUntilStatementAst.Extent, $doUntilStatementAst.Label, $newCondition, $newBody)
    }

    [object] VisitParamBlock([ParamBlockAst] $paramBlockAst)
    {
        $newAttributes = $this.VisitElements($paramBlockAst.Attributes)
        $newParameters = $this.VisitElements($paramBlockAst.Parameters)
        return [ParamBlockAst]::new($paramBlockAst.Extent, $newAttributes, $newParameters)
    }

    [object] VisitErrorStatement([ErrorStatementAst] $errorStatementAst)
    {
        return $errorStatementAst
    }

    [object] VisitErrorExpression([ErrorExpressionAst] $errorExpressionAst)
    {
        return $errorExpressionAst
    }

    [object] VisitTypeConstraint([TypeConstraintAst] $typeConstraintAst)
    {
        return [TypeConstraintAst]::new($typeConstraintAst.Extent, $typeConstraintAst.TypeName)
    }

    [object] VisitAttribute([AttributeAst] $attributeAst)
    {
        $newPositionalArguments = $this.VisitElements($attributeAst.PositionalArguments)
        $newNamedArguments = $this.VisitElements($attributeAst.NamedArguments)
        return [AttributeAst]::new($attributeAst.Extent, $attributeAst.TypeName, $newPositionalArguments, $newNamedArguments)
    }

    [object] VisitNamedAttributeArgument([NamedAttributeArgumentAst] $namedAttributeArgumentAst)
    {
        $newArgument = $this.VisitElement($namedAttributeArgumentAst.Argument)
        return [NamedAttributeArgumentAst]::new($namedAttributeArgumentAst.Extent, $namedAttributeArgumentAst.ArgumentName, $newArgument,$namedAttributeArgumentAst.ExpressionOmitted)
    }

    [object] VisitParameter([ParameterAst] $parameterAst)
    {
        $newName = $this.VisitElement($parameterAst.Name)
        $newAttributes = $this.VisitElements($parameterAst.Attributes)
        $newDefaultValue = $this.VisitElement($parameterAst.DefaultValue)
        return [ParameterAst]::new($parameterAst.Extent, $newName, $newAttributes, $newDefaultValue)
    }

    [object] VisitBreakStatement([BreakStatementAst] $breakStatementAst)
    {
        $newLabel = $this.VisitElement($breakStatementAst.Label)
        return [BreakStatementAst]::new($breakStatementAst.Extent, $newLabel)
    }

    [object] VisitContinueStatement([ContinueStatementAst] $continueStatementAst)
    {
        $newLabel = $this.VisitElement($continueStatementAst.Label)
        return [ContinueStatementAst]::new($continueStatementAst.Extent, $newLabel)
    }

    [object] VisitReturnStatement([ReturnStatementAst] $returnStatementAst)
    {
        $newPipeline = $this.VisitElement($returnStatementAst.Pipeline)
        return [ReturnStatementAst]::new($returnStatementAst.Extent, $newPipeline)
    }

    [object] VisitExitStatement([ExitStatementAst] $exitStatementAst)
    {
        $newPipeline = $this.VisitElement($exitStatementAst.Pipeline)
        return [ExitStatementAst]::new($exitStatementAst.Extent, $newPipeline)
    }

    [object] VisitThrowStatement([ThrowStatementAst] $throwStatementAst)
    {
        $newPipeline = $this.VisitElement($throwStatementAst.Pipeline)
        return [ThrowStatementAst]::new($throwStatementAst.Extent, $newPipeline)
    }

    [object] VisitAssignmentStatement([AssignmentStatementAst] $assignmentStatementAst)
    {
        $newLeft = $this.VisitElement($assignmentStatementAst.Left)
        $newRight = $this.VisitElement($assignmentStatementAst.Right)
        return [AssignmentStatementAst]::new($assignmentStatementAst.Extent, $newLeft, $assignmentStatementAst.Operator,$newRight, $assignmentStatementAst.ErrorPosition)
    }

    [object] VisitPipeline([PipelineAst] $pipelineAst)
    {
        $newPipeElements = $this.VisitElements($pipelineAst.PipelineElements)
        return [PipelineAst]::new($pipelineAst.Extent, $newPipeElements)
    }

    [object] VisitCommand([CommandAst] $commandAst)
    {
        $newCommandElements = $this.VisitElements($commandAst.CommandElements)
        $newRedirections = $this.VisitElements($commandAst.Redirections)
        return [CommandAst]::new($commandAst.Extent, $newCommandElements, $commandAst.InvocationOperator, $newRedirections)
    }

    [object] VisitCommandExpression([CommandExpressionAst] $commandExpressionAst)
    {
        $newExpression = $this.VisitElement($commandExpressionAst.Expression)
        $newRedirections = $this.VisitElements($commandExpressionAst.Redirections)
        return [CommandExpressionAst]::new($commandExpressionAst.Extent, $newExpression, $newRedirections)
    }

    [object] VisitCommandParameter([CommandParameterAst] $commandParameterAst)
    {
        $newArgument = $this.VisitElement($commandParameterAst.Argument)
        return [CommandParameterAst]::new($commandParameterAst.Extent, $commandParameterAst.ParameterName, $newArgument, $commandParameterAst.ErrorPosition)
    }

    [object] VisitFileRedirection([FileRedirectionAst] $fileRedirectionAst)
    {
        $newFile = $this.VisitElement($fileRedirectionAst.Location)
        return [FileRedirectionAst]::new($fileRedirectionAst.Extent, $fileRedirectionAst.FromStream, $newFile, $fileRedirectionAst.Append)
    }

    [object] VisitMergingRedirection([MergingRedirectionAst] $mergingRedirectionAst)
    {
        return [MergingRedirectionAst]::new($mergingRedirectionAst.Extent, $mergingRedirectionAst.FromStream, $mergingRedirectionAst.ToStream)
    }

    [object] VisitBinaryExpression([BinaryExpressionAst] $binaryExpressionAst)
    {
        $newLeft = $this.VisitElement($binaryExpressionAst.Left)
        $newRight = $this.VisitElement($binaryExpressionAst.Right)
        return [BinaryExpressionAst]::new($binaryExpressionAst.Extent, $newLeft, $binaryExpressionAst.Operator, $newRight, $binaryExpressionAst.ErrorPosition)
    }

    [object] VisitUnaryExpression([UnaryExpressionAst] $unaryExpressionAst)
    {
        $newChild = $this.VisitElement($unaryExpressionAst.Child)
        return [UnaryExpressionAst]::new($unaryExpressionAst.Extent, $unaryExpressionAst.TokenKind, $newChild)
    }

    [object] VisitConvertExpression([ConvertExpressionAst] $convertExpressionAst)
    {
        $newChild = $this.VisitElement($convertExpressionAst.Child)
        $newTypeConstraint = $this.VisitElement($convertExpressionAst.Type)
        return [ConvertExpressionAst]::new($convertExpressionAst.Extent, $newTypeConstraint, $newChild)
    }

    [object] VisitTypeExpression([TypeExpressionAst] $typeExpressionAst)
    {
        return [TypeExpressionAst]::new($typeExpressionAst.Extent, $typeExpressionAst.TypeName)
    }

    [object] VisitConstantExpression([ConstantExpressionAst] $constantExpressionAst)
    {
        return [ConstantExpressionAst]::new($constantExpressionAst.Extent, $constantExpressionAst.Value)
    }

    [object] VisitStringConstantExpression([StringConstantExpressionAst] $stringConstantExpressionAst)
    {
        return [StringConstantExpressionAst]::new($stringConstantExpressionAst.Extent, $stringConstantExpressionAst.Value, $stringConstantExpressionAst.StringConstantType)
    }

    [object] VisitSubExpression([SubExpressionAst] $subExpressionAst)
    {
        $newStatementBlock = $this.VisitElement($subExpressionAst.SubExpression)
        return [SubExpressionAst]::new($subExpressionAst.Extent, $newStatementBlock)
    }

    [object] VisitUsingExpression([UsingExpressionAst] $usingExpressionAst)
    {
        $newUsingExpr = $this.VisitElement($usingExpressionAst.SubExpression)
        return [UsingExpressionAst]::new($usingExpressionAst.Extent, $newUsingExpr)
    }

    [object] VisitVariableExpression([VariableExpressionAst] $variableExpressionAst)
    {
        return [VariableExpressionAst]::new($variableExpressionAst.Extent, $variableExpressionAst.VariablePath.UserPath, $variableExpressionAst.Splatted)
    }

    [object] VisitMemberExpression([MemberExpressionAst] $memberExpressionAst)
    {
        $newExpr = $this.VisitElement($memberExpressionAst.Expression)
        $newMember = $this.VisitElement($memberExpressionAst.Member)
        return [MemberExpressionAst]::new($memberExpressionAst.Extent, $newExpr, $newMember, $memberExpressionAst.Static)
    }

    [object] VisitInvokeMemberExpression([InvokeMemberExpressionAst] $invokeMemberExpressionAst)
    {
        $newExpression = $this.VisitElement($invokeMemberExpressionAst.Expression)
        $newMethod = $this.VisitElement($invokeMemberExpressionAst.Member)
        $newArguments = $this.VisitElements($invokeMemberExpressionAst.Arguments)
        return [InvokeMemberExpressionAst]::new($invokeMemberExpressionAst.Extent, $newExpression, $newMethod, $newArguments, $invokeMemberExpressionAst.Static)
    }

    [object] VisitArrayExpression([ArrayExpressionAst] $arrayExpressionAst)
    {
        $newStatementBlock = $this.VisitElement($arrayExpressionAst.SubExpression)
        return [ArrayExpressionAst]::new($arrayExpressionAst.Extent, $newStatementBlock)
    }

    [object] VisitArrayLiteral([ArrayLiteralAst] $arrayLiteralAst)
    {
        $newArrayElements = $this.VisitElements($arrayLiteralAst.Elements)
        return [ArrayLiteralAst]::new($arrayLiteralAst.Extent, $newArrayElements)
    }

    [object] VisitHashtable([HashtableAst] $hashtableAst)
    {
        $newKeyValuePairs = [List[Tuple[ExpressionAst,StatementAst]]]::new()
        foreach ($keyValuePair in $hashtableAst.KeyValuePairs)
        {
            $newKey = $this.VisitElement($keyValuePair.Item1);
            $newValue = $this.VisitElement($keyValuePair.Item2);
            $newKeyValuePairs.Add([Tuple[ExpressionAst,StatementAst]]::new($newKey, $newValue)) # TODO NOT SURE
        }
        return [HashtableAst]::new($hashtableAst.Extent, $newKeyValuePairs)
    }

    [object] VisitScriptBlockExpression([ScriptBlockExpressionAst] $scriptBlockExpressionAst)
    {
        $newScriptBlock = $this.VisitElement($scriptBlockExpressionAst.ScriptBlock)
        return [ScriptBlockExpressionAst]::new($scriptBlockExpressionAst.Extent, $newScriptBlock)
    }

    [object] VisitParenExpression([ParenExpressionAst] $parenExpressionAst)
    {
        $newPipeline = $this.VisitElement($parenExpressionAst.Pipeline)
        return [ParenExpressionAst]::new($parenExpressionAst.Extent, $newPipeline)
    }

    [object] VisitExpandableStringExpression([ExpandableStringExpressionAst] $expandableStringExpressionAst)
    {
        return [ExpandableStringExpressionAst]::new($expandableStringExpressionAst.Extent,$expandableStringExpressionAst.Value,$expandableStringExpressionAst.StringConstantType)
    }

    [object] VisitIndexExpression([IndexExpressionAst] $indexExpressionAst)
    {
        $newTargetExpression = $this.VisitElement($indexExpressionAst.Target)
        $newIndexExpression = $this.VisitElement($indexExpressionAst.Index)
        return [IndexExpressionAst]::new($indexExpressionAst.Extent, $newTargetExpression, $newIndexExpression)
    }

    [object] VisitAttributedExpression([AttributedExpressionAst] $attributedExpressionAst)
    {
        $newAttribute = $this.VisitElement($attributedExpressionAst.Attribute)
        $newChild = $this.VisitElement($attributedExpressionAst.Child)
        return [AttributedExpressionAst]::new($attributedExpressionAst.Extent, $newAttribute, $newChild)
    }

    [object] VisitBlockStatement([BlockStatementAst] $blockStatementAst)
    {
        $newBody = $this.VisitElement($blockStatementAst.Body)
        return [BlockStatementAst]::new($blockStatementAst.Extent, $blockStatementAst.Kind, $newBody)
    }

    [object] VisitTypeDefinition([TypeDefinitionAst] $typeDefinitionAst)
    {
        $newAttributes = $this.VisitElements($typeDefinitionAst.Attributes)
        $newBaseTypes = $this.VisitElements($typeDefinitionAst.BaseTypes)
        $newMembers = $this.VisitElements($typeDefinitionAst.Members)

        return [TypeDefinitionAst]::new($typeDefinitionAst.Extent, $typeDefinitionAst.Name, $newAttributes, $newMembers, $typeDefinitionAst.TypeAttributes, $newBaseTypes)
    }

    [object] VisitPropertyMember([PropertyMemberAst] $propertyMemberAst)
    {
        $newPropertyType = $this.VisitElement($propertyMemberAst.PropertyType)
        $newAttributes = $this.VisitElements($propertyMemberAst.Attributes)
        $newInitValue = $this.VisitElement($propertyMemberAst.InitialValue)
        return [PropertyMemberAst]::new($propertyMemberAst.Extent, $propertyMemberAst.Name, $newPropertyType, $newAttributes, $propertyMemberAst.PropertyAttributes, $newInitValue)
    }

    [object] VisitFunctionMember([FunctionMemberAst] $functionMemberAst)
    {
        $newBody = $this.VisitElement($functionMemberAst.Body)
        $newParameters = $this.VisitElements($functionMemberAst.Parameters)
        $newFunctionDefinition = $this.VisitElement($functionMemberAst.Extent, $false, $false, $functionMemberAst.Name, $newParameters, $newBody)

        $newReturnType = $this.VisitElement($functionMemberAst.ReturnType)
        $newAttributes = $this.VisitElements($functionMemberAst.Attributes)
        return [FunctionMemberAst]::new($functionMemberAst.Extent, $newFunctionDefinition, $newReturnType, $newAttributes, $functionMemberAst.MethodAttributes)
    }

    [object] VisitBaseCtorInvokeMemberExpression([BaseCtorInvokeMemberExpressionAst] $baseCtorAst)
    {
        $newInvokeMemberExpression = $this.VisitInvokeMemberExpression($baseCtorAst)
        return [BaseCtorInvokeMemberExpressionAst]::new($baseCtorAst.Expression.Extent, $newInvokeMemberExpression.Extent, $newInvokeMemberExpression)
    }

    [object] VisitUsingStatement([UsingStatementAst] $usingStatementAst)
    {
        $newName = $this.VisitElement($usingStatementAst.Name)
        $newAlias = if($usingStatementAst.Alias -is [StringConstantExpressionAst]){
            $this.VisitElement($usingStatementAst.Alias)
        }

        switch($usingStatementAst.UsingStatementKind)
        {
            'Module' {
                if($usingStatementAst.ModuleSpecification -is [HashtableAst]){
                    $newModuleSpec = $this.VisitElement($usingStatementAst.ModuleSpecification)
                    if($newAlias){
                        return [UsingStatementAst]::new($usingStatementAst.Extent, $newName, $newModuleSpec)
                    }
                    return [UsingStatementAst]::new($usingStatementAst.Extent, $newModuleSpec)
                }
                if($newAlias){
                    return [UsingStatementAst]::new($usingStatementAst.Extent, $_, $newName, $newAlias)
                }
                return [UsingStatementAst]::new($usingStatementAst.Extent, $_, $newName)
            }

            default {
                if($newAlias){
                    return [UsingStatementAst]::new($usingStatementAst.Extent, $_, $newName, $newAlias)
                }
                return [UsingStatementAst]::new($usingStatementAst.Extent, $_, $newName)
            }
        }

        throw [System.NotImplementedException]::new()
    }

    [object] VisitConfigurationDefinition([ConfigurationDefinitionAst]$configDefinitionAst)
    {
        $newConfig = $this.VisitElement($configDefinitionAst.Body)
        $newInstanceName = $this.VisitElement($configDefinitionAst.InstanceName)
        return [ConfigurationDefinitionAst]::new($configDefinitionAst.Extent, $newConfig, $configDefinitionAst.ConfigurationType, $newInstanceName)
    }

    [object] VisitDynamicKeywordStatement([DynamicKeywordStatementAst]$dynamicKeywordAst)
    {
        $newElements = $this.VisitElements($dynamicKeywordAst.CommandElements)
        return [DynamicKeywordStatementAst]::new($dynamicKeywordAst.Extent, $newElements)
    }
}
#endregion