Re: [myhdl-list] MEP : Signal Containers

[Jan D. <ja...@ja...>]

On 05/18/2012 09:57 PM, Christopher Felton wrote:

> The advantage of a class method over a function ... no advantage per se.
>    They both achieve the same thing in the similar manner.  But it gives
> the ability to use a method versus a function if someone wanted.

I think there has to be a much better reason than this to warrant
the effort to support this in conversion. There should be some feature
that many people find useful and that cannot reasonably done in
a different way. Conversion is complex enough as it is!

> We have had this conversation a couple times in the past.  The current
> solution is to have a method that returns the generators from the
> function, essentially wrapping a function in a /class method/.  By
> allowing the /class method/ to be directly convertible would remove the
> need to wrap a function.

I don't remember - can you provide simple examples? Is the issue only
related to the very top level, as I MEP 108  seems to suggest, or also
to intermediate hierarchical levels?

> MEP-108 is simple, its only intention is to enable a /class method/ the
> same as a function.  My best example of why you might want to do this is
> the following example, http://bit.ly/w95kOd.
>
> The /class method/ conversion and the /class attribute/ can be viewed as
> separate.  They can be used together but nothing says they have to be
> and the reason for the separate MEPs.  The idea of the /class
> attribute/, when it is a Signal (a.k.a  Signal container), basically
> helps manage namespace and organize collection of Signals.  The MEP-107
> for the attributes simply proposes to create a unique name for /class
> attribute/ when it is a Signal.
>
> If the example in the previous post (the wishbone) didn't illustrate how
> /class attributes/ could be used, either I am poorly explaining or we
> might have a misunderstanding what a /class attribute/ is.  I guess, I
> would refer you back to the internal bus examples I and Oscar provided.
/114/50122263/

I'm confused about terminology. When you talk about class attributes,
are you sure you don't mean instance attributes instead?

-- 
Jan Decaluwe - Resources bvba - http://www.jandecaluwe.com
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