public void VisitSignalRef(SignalRef signalRef)
{
switch (signalRef.Prop)
{
case SignalRef.EReferencedProperty.Instance:
case SignalRef.EReferencedProperty.ChangedEvent:
{
Result = true;
SignalDescriptor sd = signalRef.Desc as SignalDescriptor;
if (sd != null)
{
switch (signalRef.Prop)
{
case SignalRef.EReferencedProperty.Instance:
ConstValue = sd.SignalInstance;
break;
case SignalRef.EReferencedProperty.ChangedEvent:
ConstValue = sd.SignalInstance.ChangedEvent;
break;
default:
throw new NotImplementedException();
}
}
}
break;
default:
Result = false;
break;
}
}
public static object DefaultEval(SignalRef signalRef, IEvaluator eval)
{
SignalDescriptor sd = signalRef.Desc as SignalDescriptor;
if (sd == null)
{
throw new BreakEvaluationException();
}
SignalBase sinst = sd.SignalInstance;
dynamic sobj = sinst;
if (signalRef.Indices != null && signalRef.Indices.Count() > 0)
{
foreach (Expression[] indices in signalRef.Indices)
{
object[] indexvs = indices.Select(x => x.Eval(eval)).ToArray();
Type[] indexts = indexvs.Select(x => x.GetType()).ToArray();
Type vtype = sobj.GetType();
PropertyInfo prop = vtype.GetProperty("Item", indexts);
if (prop == null)
{
throw new InvalidOperationException("Indexer property not found");
}
sobj = prop.GetValue(sobj, indexvs);
}
}
switch (signalRef.Prop)
{
case SignalRef.EReferencedProperty.ChangedEvent:
return(sobj.ChangedEvent);
case SignalRef.EReferencedProperty.Cur:
if (sinst.Context.State == DesignContext.ESimState.Simulation)
{
return(sobj.Cur);
}
else
{
return(sobj.InitialValue);
}
case SignalRef.EReferencedProperty.FallingEdge:
if (sinst.Context.State == DesignContext.ESimState.Simulation)
{
return(((In <StdLogic>)sobj).FallingEdge());
}
else
{
return(false);
}
case SignalRef.EReferencedProperty.RisingEdge:
if (sinst.Context.State == DesignContext.ESimState.Simulation)
{
return(((In <StdLogic>)sobj).RisingEdge());
}
else
{
return(false);
}
case SignalRef.EReferencedProperty.Instance:
return(sobj);
case SignalRef.EReferencedProperty.Next:
throw new InvalidOperationException();
case SignalRef.EReferencedProperty.Pre:
if (sinst.Context.State == DesignContext.ESimState.Simulation)
{
return(sobj.Pre);
}
else
{
return(sobj.InitialValue);
}
default:
throw new NotImplementedException();
}
}
