public virtual Differences VisitQueryPosition(QueryPosition position1, QueryPosition position2){
Differences differences = new Differences(position1, position2);
if (position1 == null || position2 == null){
if (position1 != position2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
QueryPosition changes = (QueryPosition)position2.Clone();
QueryPosition deletions = (QueryPosition)position2.Clone();
QueryPosition insertions = (QueryPosition)position2.Clone();
//position1.Context;
if (differences.NumberOfDifferences == 0){
differences.Changes = null;
differences.Deletions = null;
differences.Insertions = null;
}else{
differences.Changes = changes;
differences.Deletions = deletions;
differences.Insertions = insertions;
}
return differences;
}
public virtual Node VisitQueryPosition(QueryPosition position, QueryPosition changes, QueryPosition deletions, QueryPosition insertions){
this.UpdateSourceContext(position, changes);
if (position == null) return changes;
if (changes != null){
if (deletions == null || insertions == null)
Debug.Assert(false);
else{
}
}else if (deletions != null)
return null;
return position;
}
public override Node VisitQueryPosition(QueryPosition position){
this.hasContextReference = true;
return position;
}
public virtual Node VisitQueryPosition(QueryPosition position){
return position;
}
public override Node VisitQueryPosition(QueryPosition position){
if (position == null) return null;
return base.VisitQueryPosition((QueryPosition)position.Clone());
}
public virtual void VisitQueryPosition(QueryPosition position){
}
public virtual Node VisitQueryPosition(QueryPosition position1, QueryPosition position2){
return position1;
}
public override Node VisitQueryPosition(QueryPosition qp) {
if (qp.Context != null) {
if (qp.Context.Position == null && qp.Context.PreFilter != null && qp.Context.PostFilter != null) {
qp.Context.Position = this.NewClosureLocal(SystemTypes.Int32, this.currentMethod.Body.Scope);
qp.Context.PreFilter.Statements.Add(new AssignmentStatement(qp.Context.Position, Literal.Int32Zero));
BinaryExpression badd = new BinaryExpression(qp.Context.Position, Literal.Int32One, NodeType.Add);
badd.Type = SystemTypes.Int32;
qp.Context.PostFilter.Statements.Add(new AssignmentStatement(qp.Context.Position, badd));
}
return this.VisitExpression(qp.Context.Position);
}
return Literal.Int32Zero;
}
public override Node VisitQueryPosition(QueryPosition position) {
this.hasContextReference = true;
return this.Compose(position, this.GetComposer(position));
}
public override Node VisitQueryPosition(QueryPosition position)
{
this.hasContextReference = true;
return(this.Compose(position, this.GetComposer(position)));
}
public EventingVisitor(Action<QueryPosition> visitQueryPosition) { VisitedQueryPosition += visitQueryPosition; } public event Action<QueryPosition> VisitedQueryPosition; public override Node VisitQueryPosition(QueryPosition position) { if (VisitedQueryPosition != null) VisitedQueryPosition(position); return base.VisitQueryPosition(position); }
