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;
}
}