public override CodeNode VisitSkipAssignmentIfMissingValue(SkipAssignmentIfMissingValueNode node)
{
_Writer.WriteStartElement("SkipAssignmentIfMissingValue");
_Writer.WriteAttributeString("MissingValue", node.MissingValue.ToString());
_Writer.WriteAttributeString("Type", node.MissingValue.GetType().ToString());
_Writer.WriteEndElement();
return(node);
}
public override CodeNode VisitSkipAssignmentIfMissingValue(SkipAssignmentIfMissingValueNode node)
{
if (!_InFieldAssignment)
{
throw new InvalidOperationException("SkipAssignmentIfMissingValueNode must be in a FieldAssignmentNode");
}
ILGen.Ldloca(_FieldLocal);
ILGen.Ldc(node.MissingValue, node.MissingValue.GetType());
//BUG: Revisit this. The purpose of constrained is so you don't have to do different codegen for valuetype vs. reference type
if (_FieldLocal.LocalType.IsValueType)
{
ILGen.Box(_FieldLocal.LocalType);
}
ILGen.Constrained(_FieldLocal.LocalType);
// TODO: if (!node.AllowMissingValue) { do the next two lines... }
ILGen.Callvirt(typeof(object).GetMethod("Equals", typeof(object)));
ILGen.Brtrue(_SkipAssignmentLabel);
return(node);
}
public virtual CodeNode VisitSkipAssignmentIfMissingValue(SkipAssignmentIfMissingValueNode node)
{
return(node);
}