protected override QilNode VisitUnion(QilBinary local0) {
QilNode local1 = local0[0];
QilNode local2 = local0[1];
if (this[XmlILOptimization.FoldNone]) {
if ( (object) ( (local1).XmlType ) == (object) XmlQueryTypeFactory.None ) {
if (AllowReplace(XmlILOptimization.FoldNone, local0)) {
return Replace(XmlILOptimization.FoldNone, local0, VisitNop(f.Nop(local1)));
}
}
}
if (this[XmlILOptimization.FoldNone]) {
if ( (object) ( (local2).XmlType ) == (object) XmlQueryTypeFactory.None ) {
if (AllowReplace(XmlILOptimization.FoldNone, local0)) {
return Replace(XmlILOptimization.FoldNone, local0, VisitNop(f.Nop(local2)));
}
}
}
if (this[XmlILOptimization.EliminateUnion]) {
if (local2 == local1) {
if (AllowReplace(XmlILOptimization.EliminateUnion, local0)) {
return Replace(XmlILOptimization.EliminateUnion, local0, VisitDocOrderDistinct(f.DocOrderDistinct(local1)));
}
}
}
if (this[XmlILOptimization.EliminateUnion]) {
if (local1.NodeType == QilNodeType.Sequence) {
if ( (local1).Count == (0) ) {
if (AllowReplace(XmlILOptimization.EliminateUnion, local0)) {
return Replace(XmlILOptimization.EliminateUnion, local0, VisitDocOrderDistinct(f.DocOrderDistinct(local2)));
}
}
}
}
if (this[XmlILOptimization.EliminateUnion]) {
if (local2.NodeType == QilNodeType.Sequence) {
if ( (local2).Count == (0) ) {
if (AllowReplace(XmlILOptimization.EliminateUnion, local0)) {
return Replace(XmlILOptimization.EliminateUnion, local0, VisitDocOrderDistinct(f.DocOrderDistinct(local1)));
}
}
}
}
if (this[XmlILOptimization.EliminateUnion]) {
if (local1.NodeType == QilNodeType.XmlContext) {
if (local2.NodeType == QilNodeType.XmlContext) {
if (AllowReplace(XmlILOptimization.EliminateUnion, local0)) {
return Replace(XmlILOptimization.EliminateUnion, local0, local1);
}
}
}
}
if (this[XmlILOptimization.NormalizeUnion]) {
if ((!( IsDocOrderDistinct(local1) )) || (!( IsDocOrderDistinct(local2) ))) {
if (AllowReplace(XmlILOptimization.NormalizeUnion, local0)) {
return Replace(XmlILOptimization.NormalizeUnion, local0, VisitUnion(f.Union(VisitDocOrderDistinct(f.DocOrderDistinct(local1)), VisitDocOrderDistinct(f.DocOrderDistinct(local2)))));
}
}
}
if (this[XmlILOptimization.AnnotateUnion]) {
if (AllowReplace(XmlILOptimization.AnnotateUnion, local0)) {
OptimizerPatterns.Write((QilNode) (local0)).AddPattern(OptimizerPatternName.IsDocOrderDistinct); }
}
if (this[XmlILOptimization.AnnotateUnionContent]) {
if (( IsStepPattern(local1, QilNodeType.Content) ) || ( IsStepPattern(local1, QilNodeType.Union) )) {
if ((( IsStepPattern(local2, QilNodeType.Content) ) || ( IsStepPattern(local2, QilNodeType.Union) )) && ( ( OptimizerPatterns.Read((QilNode) (local1)).GetArgument(OptimizerPatternArgument.StepInput) ) == ( OptimizerPatterns.Read((QilNode) (local2)).GetArgument(OptimizerPatternArgument.StepInput) ) )) {
if (AllowReplace(XmlILOptimization.AnnotateUnionContent, local0)) {
AddStepPattern((QilNode) (local0), (QilNode) ( OptimizerPatterns.Read((QilNode) (local1)).GetArgument(OptimizerPatternArgument.StepInput) )); OptimizerPatterns.Write((QilNode) (local0)).AddPattern(OptimizerPatternName.SameDepth); }
}
}
}
return NoReplace(local0);
}