public virtual Differences VisitQueryYielder(QueryYielder yielder1, QueryYielder yielder2){
Differences differences = new Differences(yielder1, yielder2);
if (yielder1 == null || yielder2 == null){
if (yielder1 != yielder2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
QueryYielder changes = (QueryYielder)yielder2.Clone();
QueryYielder deletions = (QueryYielder)yielder2.Clone();
QueryYielder insertions = (QueryYielder)yielder2.Clone();
// yielder1.Body;
// yielder1.Source;
// yielder1.State;
// yielder1.Target;
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 VisitQueryYielder(QueryYielder yielder, QueryYielder changes, QueryYielder deletions, QueryYielder insertions){
this.UpdateSourceContext(yielder, changes);
if (yielder == null) return changes;
if (changes != null){
if (deletions == null || insertions == null)
Debug.Assert(false);
else{
}
}else if (deletions != null)
return null;
return yielder;
}
public virtual void VisitQueryYielder(QueryYielder yielder){
if (yielder == null) return;
this.VisitExpression(yielder.Source);
this.VisitExpression(yielder.Target);
this.VisitBlock(yielder.Body);
}
public virtual Node VisitQueryYielder(QueryYielder yielder){
if (yielder == null) return null;
yielder.Source = this.VisitExpression(yielder.Source);
yielder.Target = this.VisitExpression(yielder.Target);
yielder.Body = this.VisitBlock(yielder.Body);
return yielder;
}
public override Node VisitQueryYielder(QueryYielder yielder){
if (yielder == null) return null;
return base.VisitQueryYielder((QueryYielder)yielder.Clone());
}
public virtual Node VisitQueryYielder(QueryYielder yielder1, QueryYielder yielder2){
if (yielder1 == null) return null;
if (yielder2 == null){
yielder1.Source = this.VisitExpression(yielder1.Source, null);
yielder1.Target = this.VisitExpression(yielder1.Target, null);
yielder1.Body = this.VisitBlock(yielder1.Body, null);
}else{
yielder1.Source = this.VisitExpression(yielder1.Source, yielder2.Source);
yielder1.Target = this.VisitExpression(yielder1.Target, yielder2.Target);
yielder1.Body = this.VisitBlock(yielder1.Body, yielder2.Body);
}
return yielder1;
}
public override Node VisitQueryYielder(QueryYielder qy) {
bool savedFoldQuery = this.foldQuery;
this.foldQuery = true;
Block feBlock = (Block) this.Visit(qy.Source);
this.foldQuery = false;
Yielder yielder = new Yielder(this.typeSystem, this.TypeViewer);
return this.Visit(yielder.YieldTo(feBlock, qy.Body, qy.Target, qy.State));
}
public virtual Statement BuildClosureForEach(Expression source, ref Expression target, out Block body, BlockScope scope) {
source = this.GetInnerExpression(source);
if (source is QueryExpression) {
QueryYielder yielder = new QueryYielder();
yielder.Source = source;
yielder.Body = body = new Block(new StatementList(1));
if (target == null) target = this.NewClosureLocal(this.typeSystem.GetStreamElementType(source, this.TypeViewer), scope);
yielder.Target = target;
yielder.State = this.NewClosureLocal(SystemTypes.Int32, scope);
return yielder;
}else{
if (target == null){
TypeNode elementType = this.typeSystem.GetStreamElementType(source, this.TypeViewer);
target = target = this.NewClosureLocal(elementType, scope);
}
Literal tmpSource = new Literal(null, source.Type);
ForEach fe = new ForEach(target.Type, target, tmpSource, new Block(new StatementList(1)));
fe.ScopeForTemporaryVariables = scope;
Checker checker = new Checker(null, this.typeSystem, null, null, null);
checker.currentType = this.typeSystem.currentType = (scope.CapturedForClosure ? scope.ClosureClass : this.currentMethod.DeclaringType);
checker.VisitForEach(fe);
Debug.Assert(fe.SourceEnumerable != null);
if (fe.SourceEnumerable != null){
Debug.Assert(fe.SourceEnumerable is CollectionEnumerator, "SourceEnumerable == "+fe.SourceEnumerable.GetType());
CollectionEnumerator ce = (CollectionEnumerator)fe.SourceEnumerable;
ce.Collection = source;
}
body = fe.Body;
return fe;
}
}
public EventingVisitor(Action<QueryYielder> visitQueryYielder) { VisitedQueryYielder += visitQueryYielder; } public event Action<QueryYielder> VisitedQueryYielder; public override Node VisitQueryYielder(QueryYielder yielder) { if (VisitedQueryYielder != null) VisitedQueryYielder(yielder); return base.VisitQueryYielder(yielder); }
