static XmlILMethods()
{
StorageMethods = new Dictionary<Type, XmlILStorageMethods>();
StorageMethods[typeof(string)] = new XmlILStorageMethods(typeof(string));
StorageMethods[typeof(bool)] = new XmlILStorageMethods(typeof(bool));
StorageMethods[typeof(int)] = new XmlILStorageMethods(typeof(int));
StorageMethods[typeof(long)] = new XmlILStorageMethods(typeof(long));
StorageMethods[typeof(decimal)] = new XmlILStorageMethods(typeof(decimal));
StorageMethods[typeof(double)] = new XmlILStorageMethods(typeof(double));
StorageMethods[typeof(float)] = new XmlILStorageMethods(typeof(float));
StorageMethods[typeof(DateTime)] = new XmlILStorageMethods(typeof(DateTime));
StorageMethods[typeof(byte[])] = new XmlILStorageMethods(typeof(byte[]));
StorageMethods[typeof(XmlQualifiedName)] = new XmlILStorageMethods(typeof(XmlQualifiedName));
StorageMethods[typeof(TimeSpan)] = new XmlILStorageMethods(typeof(TimeSpan));
StorageMethods[typeof(XPathItem)] = new XmlILStorageMethods(typeof(XPathItem));
StorageMethods[typeof(XPathNavigator)] = new XmlILStorageMethods(typeof(XPathNavigator));
}
/// <summary>
/// Generate code for QilNodeType.Sum, QilNodeType.Average, QilNodeType.Minimum, and QilNodeType.Maximum.
/// </summary>
private QilNode CreateAggregator(QilUnary ndAgg, string aggName, XmlILStorageMethods methods, MethodInfo methAgg, MethodInfo methResult)
{
Label lblOnEnd = _helper.DefineLabel();
Type typAgg = methAgg.DeclaringType;
LocalBuilder locAgg;
// Aggregate agg;
// agg.Create();
locAgg = _helper.DeclareLocal(aggName, typAgg);
_helper.Emit(OpCodes.Ldloca, locAgg);
_helper.Call(methods.AggCreate);
// foreach (num in expr) {
StartNestedIterator(ndAgg.Child, lblOnEnd);
_helper.Emit(OpCodes.Ldloca, locAgg);
Visit(ndAgg.Child);
// agg.Aggregate(num);
_iterCurr.EnsureStackNoCache();
_iterCurr.EnsureItemStorageType(ndAgg.XmlType, GetItemStorageType(ndAgg));
_helper.Call(methAgg);
_helper.Emit(OpCodes.Ldloca, locAgg);
// }
_iterCurr.LoopToEnd(lblOnEnd);
// End nested iterator
EndNestedIterator(ndAgg.Child);
// If aggregate might be empty sequence, then generate code to handle this possibility
if (ndAgg.XmlType.MaybeEmpty)
{
// if (agg.IsEmpty) goto LabelNextCtxt;
_helper.Call(methods.AggIsEmpty);
_helper.Emit(OpCodes.Brtrue, _iterCurr.GetLabelNext());
_helper.Emit(OpCodes.Ldloca, locAgg);
}
// result = agg.Result;
_helper.Call(methResult);
_iterCurr.Storage = StorageDescriptor.Stack(GetItemStorageType(ndAgg), false);
return ndAgg;
}
