public object sub(object a, object b)
{
RTSRegister regA = a as RTSRegister;
if (regA == null)
{
return(null);
}
RTSRegister reg = b as RTSRegister;
if (reg != null && reg.Vars != null)
{
foreach (var v in reg.Vars.Keys)
{
regA.removeVar(v);
}
}
return(regA);
}
public object add(object a, object b)
{
RTSRegister regA = a as RTSRegister;
if (a != null && regA == null)
{
return(null);
}
RTSRegister reg = b as RTSRegister;
if (reg != null && reg.Vars != null)
{
if (regA == null)
{
regA = new RTSRegister();
}
foreach (var v in reg.Vars.Keys)
{
regA.addVar(v, reg.Vars[v]);
}
}
return(regA);
}