Re: [myhdl-list] Convertible records

[Christopher F. <chr...@gm...>]

On 9/2/2011 1:15 PM, Jan Langer wrote:
> Hi all,
>
> Am 02.09.2011 um 18:06 schrieb Christopher Felton:
>> How the conversion analyzer works now, it looks at free variables (not
>> sure what a free variable is) and checks the type.  If the type were
>> to
>> be any class (object) the converter has to do more work to determine
>> if
>> appropriate signals exist in the class.  If the converter can check
>> for
>> a particular type (base class) then it knows it has signals and can
>> extract.  Make sense?  Maybe the AST easily supports this and the base
>> class is not needed.
>
>
> maybe it would be a good idea to let the converter "ask" the class how
> it wants to be converted. In a very simple case something like:
>
> class SignalStruct:
> 	def __signals__(self):
> 		return self.a,self.b
>
> Jan
>


My thought was something like this:

   class SignalStruct(object):
      def __init__(self):
         pass

      def __signals__(self):
         return self.__dict__


   class MyBus(SignalStruct):
       def __init__(self):
           self.addr = Signal(intbv(0)[16:])
           self.data = Signal(intbv(0)[8:])


   bus = MyBus()
   bus.__signals__()
   # This will return the signal objects with the names, the function
   # can also inspect each of the dict elemets and make sure they are
   # the correct types.

At this point, I think (naively) this is a big chunk.  This private 
function (__signals__) will need to dig deeper for embedded 
SignalStructs etc.

.chris