Re: [YANG] so many naming scopes

On Wed, Jan 09, 2008 at 08:57:49AM -0800, Andy Bierman wrote:

> Now you bring up a new twist:
>
>    typedef typedef {
>      type string;
>    }
>
>    leaf leaf {
>      type typedef;
>    }
>
> IMO, there needs to be guidelines (in the form of SHOULD NOT text)
> that says not to use YANG keywords for identifiers and not
> to use the same values for typedefs, groupings, and object names,
> even though it is allowed.

Usage guidelines and "coding styles" are valuable. But they should not
be part of the language itself. The example above is not ambiguous and
easy to parse for a machine - even though it might look stupid to most
humans.

I do remember the fun I had when C++ came along with the 'new'
keyword. The namespaces we have in YANG help to avoid such problems so
that we can add keywords to YANG without risking to break something.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1, 28759 Bremen, Germany
Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>

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