QilVisitor.cs

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namespace System.Xml.Xsl.Qil;
 
internal abstract class QilVisitor
{
    protected virtual QilNode VisitAssumeReference(QilNode expr)
    {
        if (expr is QilReference)
        {
            return VisitReference(expr);
        }
        return Visit(expr);
    }
 
    protected virtual QilNode VisitChildren(QilNode parent)
    {
        for (int i = 0; i < parent.Count; i++)
        {
            if (IsReference(parent, i))
            {
                VisitReference(parent[i]);
            }
            else
            {
                Visit(parent[i]);
            }
        }
        return parent;
    }
 
    protected virtual bool IsReference(QilNode parent, int childNum)
    {
        QilNode qilNode = parent[childNum];
        if (qilNode != null)
        {
            switch (qilNode.NodeType)
            {
            case QilNodeType.For:
            case QilNodeType.Let:
            case QilNodeType.Parameter:
                switch (parent.NodeType)
                {
                case QilNodeType.Loop:
                case QilNodeType.Filter:
                case QilNodeType.Sort:
                    return childNum == 1;
                case QilNodeType.GlobalVariableList:
                case QilNodeType.GlobalParameterList:
                case QilNodeType.FormalParameterList:
                    return false;
                default:
                    return true;
                }
            case QilNodeType.Function:
                return parent.NodeType == QilNodeType.Invoke;
            }
        }
        return false;
    }
 
    protected virtual QilNode Visit(QilNode n)
    {
        if (n == null)
        {
            return VisitNull();
        }
        return n.NodeType switch
        {
            QilNodeType.QilExpression => VisitQilExpression((QilExpression)n), 
            QilNodeType.FunctionList => VisitFunctionList((QilList)n), 
            QilNodeType.GlobalVariableList => VisitGlobalVariableList((QilList)n), 
            QilNodeType.GlobalParameterList => VisitGlobalParameterList((QilList)n), 
            QilNodeType.ActualParameterList => VisitActualParameterList((QilList)n), 
            QilNodeType.FormalParameterList => VisitFormalParameterList((QilList)n), 
            QilNodeType.SortKeyList => VisitSortKeyList((QilList)n), 
            QilNodeType.BranchList => VisitBranchList((QilList)n), 
            QilNodeType.OptimizeBarrier => VisitOptimizeBarrier((QilUnary)n), 
            QilNodeType.Unknown => VisitUnknown(n), 
            QilNodeType.DataSource => VisitDataSource((QilDataSource)n), 
            QilNodeType.Nop => VisitNop((QilUnary)n), 
            QilNodeType.Error => VisitError((QilUnary)n), 
            QilNodeType.Warning => VisitWarning((QilUnary)n), 
            QilNodeType.For => VisitFor((QilIterator)n), 
            QilNodeType.Let => VisitLet((QilIterator)n), 
            QilNodeType.Parameter => VisitParameter((QilParameter)n), 
            QilNodeType.PositionOf => VisitPositionOf((QilUnary)n), 
            QilNodeType.True => VisitTrue(n), 
            QilNodeType.False => VisitFalse(n), 
            QilNodeType.LiteralString => VisitLiteralString((QilLiteral)n), 
            QilNodeType.LiteralInt32 => VisitLiteralInt32((QilLiteral)n), 
            QilNodeType.LiteralInt64 => VisitLiteralInt64((QilLiteral)n), 
            QilNodeType.LiteralDouble => VisitLiteralDouble((QilLiteral)n), 
            QilNodeType.LiteralDecimal => VisitLiteralDecimal((QilLiteral)n), 
            QilNodeType.LiteralQName => VisitLiteralQName((QilName)n), 
            QilNodeType.LiteralType => VisitLiteralType((QilLiteral)n), 
            QilNodeType.LiteralObject => VisitLiteralObject((QilLiteral)n), 
            QilNodeType.And => VisitAnd((QilBinary)n), 
            QilNodeType.Or => VisitOr((QilBinary)n), 
            QilNodeType.Not => VisitNot((QilUnary)n), 
            QilNodeType.Conditional => VisitConditional((QilTernary)n), 
            QilNodeType.Choice => VisitChoice((QilChoice)n), 
            QilNodeType.Length => VisitLength((QilUnary)n), 
            QilNodeType.Sequence => VisitSequence((QilList)n), 
            QilNodeType.Union => VisitUnion((QilBinary)n), 
            QilNodeType.Intersection => VisitIntersection((QilBinary)n), 
            QilNodeType.Difference => VisitDifference((QilBinary)n), 
            QilNodeType.Average => VisitAverage((QilUnary)n), 
            QilNodeType.Sum => VisitSum((QilUnary)n), 
            QilNodeType.Minimum => VisitMinimum((QilUnary)n), 
            QilNodeType.Maximum => VisitMaximum((QilUnary)n), 
            QilNodeType.Negate => VisitNegate((QilUnary)n), 
            QilNodeType.Add => VisitAdd((QilBinary)n), 
            QilNodeType.Subtract => VisitSubtract((QilBinary)n), 
            QilNodeType.Multiply => VisitMultiply((QilBinary)n), 
            QilNodeType.Divide => VisitDivide((QilBinary)n), 
            QilNodeType.Modulo => VisitModulo((QilBinary)n), 
            QilNodeType.StrLength => VisitStrLength((QilUnary)n), 
            QilNodeType.StrConcat => VisitStrConcat((QilStrConcat)n), 
            QilNodeType.StrParseQName => VisitStrParseQName((QilBinary)n), 
            QilNodeType.Ne => VisitNe((QilBinary)n), 
            QilNodeType.Eq => VisitEq((QilBinary)n), 
            QilNodeType.Gt => VisitGt((QilBinary)n), 
            QilNodeType.Ge => VisitGe((QilBinary)n), 
            QilNodeType.Lt => VisitLt((QilBinary)n), 
            QilNodeType.Le => VisitLe((QilBinary)n), 
            QilNodeType.Is => VisitIs((QilBinary)n), 
            QilNodeType.After => VisitAfter((QilBinary)n), 
            QilNodeType.Before => VisitBefore((QilBinary)n), 
            QilNodeType.Loop => VisitLoop((QilLoop)n), 
            QilNodeType.Filter => VisitFilter((QilLoop)n), 
            QilNodeType.Sort => VisitSort((QilLoop)n), 
            QilNodeType.SortKey => VisitSortKey((QilSortKey)n), 
            QilNodeType.DocOrderDistinct => VisitDocOrderDistinct((QilUnary)n), 
            QilNodeType.Function => VisitFunction((QilFunction)n), 
            QilNodeType.Invoke => VisitInvoke((QilInvoke)n), 
            QilNodeType.Content => VisitContent((QilUnary)n), 
            QilNodeType.Attribute => VisitAttribute((QilBinary)n), 
            QilNodeType.Parent => VisitParent((QilUnary)n), 
            QilNodeType.Root => VisitRoot((QilUnary)n), 
            QilNodeType.XmlContext => VisitXmlContext(n), 
            QilNodeType.Descendant => VisitDescendant((QilUnary)n), 
            QilNodeType.DescendantOrSelf => VisitDescendantOrSelf((QilUnary)n), 
            QilNodeType.Ancestor => VisitAncestor((QilUnary)n), 
            QilNodeType.AncestorOrSelf => VisitAncestorOrSelf((QilUnary)n), 
            QilNodeType.Preceding => VisitPreceding((QilUnary)n), 
            QilNodeType.FollowingSibling => VisitFollowingSibling((QilUnary)n), 
            QilNodeType.PrecedingSibling => VisitPrecedingSibling((QilUnary)n), 
            QilNodeType.NodeRange => VisitNodeRange((QilBinary)n), 
            QilNodeType.Deref => VisitDeref((QilBinary)n), 
            QilNodeType.ElementCtor => VisitElementCtor((QilBinary)n), 
            QilNodeType.AttributeCtor => VisitAttributeCtor((QilBinary)n), 
            QilNodeType.CommentCtor => VisitCommentCtor((QilUnary)n), 
            QilNodeType.PICtor => VisitPICtor((QilBinary)n), 
            QilNodeType.TextCtor => VisitTextCtor((QilUnary)n), 
            QilNodeType.RawTextCtor => VisitRawTextCtor((QilUnary)n), 
            QilNodeType.DocumentCtor => VisitDocumentCtor((QilUnary)n), 
            QilNodeType.NamespaceDecl => VisitNamespaceDecl((QilBinary)n), 
            QilNodeType.RtfCtor => VisitRtfCtor((QilBinary)n), 
            QilNodeType.NameOf => VisitNameOf((QilUnary)n), 
            QilNodeType.LocalNameOf => VisitLocalNameOf((QilUnary)n), 
            QilNodeType.NamespaceUriOf => VisitNamespaceUriOf((QilUnary)n), 
            QilNodeType.PrefixOf => VisitPrefixOf((QilUnary)n), 
            QilNodeType.TypeAssert => VisitTypeAssert((QilTargetType)n), 
            QilNodeType.IsType => VisitIsType((QilTargetType)n), 
            QilNodeType.IsEmpty => VisitIsEmpty((QilUnary)n), 
            QilNodeType.XPathNodeValue => VisitXPathNodeValue((QilUnary)n), 
            QilNodeType.XPathFollowing => VisitXPathFollowing((QilUnary)n), 
            QilNodeType.XPathPreceding => VisitXPathPreceding((QilUnary)n), 
            QilNodeType.XPathNamespace => VisitXPathNamespace((QilUnary)n), 
            QilNodeType.XsltGenerateId => VisitXsltGenerateId((QilUnary)n), 
            QilNodeType.XsltInvokeLateBound => VisitXsltInvokeLateBound((QilInvokeLateBound)n), 
            QilNodeType.XsltInvokeEarlyBound => VisitXsltInvokeEarlyBound((QilInvokeEarlyBound)n), 
            QilNodeType.XsltCopy => VisitXsltCopy((QilBinary)n), 
            QilNodeType.XsltCopyOf => VisitXsltCopyOf((QilUnary)n), 
            QilNodeType.XsltConvert => VisitXsltConvert((QilTargetType)n), 
            _ => VisitUnknown(n), 
        };
    }
 
    protected virtual QilNode VisitReference(QilNode n)
    {
        if (n == null)
        {
            return VisitNull();
        }
        return n.NodeType switch
        {
            QilNodeType.For => VisitForReference((QilIterator)n), 
            QilNodeType.Let => VisitLetReference((QilIterator)n), 
            QilNodeType.Parameter => VisitParameterReference((QilParameter)n), 
            QilNodeType.Function => VisitFunctionReference((QilFunction)n), 
            _ => VisitUnknown(n), 
        };
    }
 
    protected virtual QilNode VisitNull()
    {
        return null;
    }
 
    protected virtual QilNode VisitQilExpression(QilExpression n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitFunctionList(QilList n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitGlobalVariableList(QilList n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitGlobalParameterList(QilList n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitActualParameterList(QilList n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitFormalParameterList(QilList n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitSortKeyList(QilList n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitBranchList(QilList n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitOptimizeBarrier(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitUnknown(QilNode n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitDataSource(QilDataSource n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitNop(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitError(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitWarning(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitFor(QilIterator n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitForReference(QilIterator n)
    {
        return n;
    }
 
    protected virtual QilNode VisitLet(QilIterator n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLetReference(QilIterator n)
    {
        return n;
    }
 
    protected virtual QilNode VisitParameter(QilParameter n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitParameterReference(QilParameter n)
    {
        return n;
    }
 
    protected virtual QilNode VisitPositionOf(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitTrue(QilNode n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitFalse(QilNode n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLiteralString(QilLiteral n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLiteralInt32(QilLiteral n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLiteralInt64(QilLiteral n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLiteralDouble(QilLiteral n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLiteralDecimal(QilLiteral n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLiteralQName(QilName n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLiteralType(QilLiteral n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLiteralObject(QilLiteral n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitAnd(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitOr(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitNot(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitConditional(QilTernary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitChoice(QilChoice n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLength(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitSequence(QilList n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitUnion(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitIntersection(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitDifference(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitAverage(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitSum(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitMinimum(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitMaximum(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitNegate(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitAdd(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitSubtract(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitMultiply(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitDivide(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitModulo(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitStrLength(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitStrConcat(QilStrConcat n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitStrParseQName(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitNe(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitEq(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitGt(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitGe(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLt(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLe(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitIs(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitAfter(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitBefore(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLoop(QilLoop n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitFilter(QilLoop n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitSort(QilLoop n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitSortKey(QilSortKey n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitDocOrderDistinct(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitFunction(QilFunction n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitFunctionReference(QilFunction n)
    {
        return n;
    }
 
    protected virtual QilNode VisitInvoke(QilInvoke n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitContent(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitAttribute(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitParent(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitRoot(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXmlContext(QilNode n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitDescendant(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitDescendantOrSelf(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitAncestor(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitAncestorOrSelf(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitPreceding(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitFollowingSibling(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitPrecedingSibling(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitNodeRange(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitDeref(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitElementCtor(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitAttributeCtor(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitCommentCtor(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitPICtor(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitTextCtor(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitRawTextCtor(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitDocumentCtor(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitNamespaceDecl(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitRtfCtor(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitNameOf(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitLocalNameOf(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitNamespaceUriOf(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitPrefixOf(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitTypeAssert(QilTargetType n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitIsType(QilTargetType n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitIsEmpty(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXPathNodeValue(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXPathFollowing(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXPathPreceding(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXPathNamespace(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXsltGenerateId(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXsltInvokeLateBound(QilInvokeLateBound n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXsltInvokeEarlyBound(QilInvokeEarlyBound n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXsltCopy(QilBinary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXsltCopyOf(QilUnary n)
    {
        return VisitChildren(n);
    }
 
    protected virtual QilNode VisitXsltConvert(QilTargetType n)
    {
        return VisitChildren(n);
    }
}