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Date:	Tue, 26 Jan 2016 13:35:50 -0900
Message-ID:	<CAC4O8c9RDJc17XGo-H6DuN5h76RKhQmRNGpcn3DKBKUBP=PuCg@mail.gmail.com>
Subject:	Re: [geda-user] The nature of gEDA users
From:	"Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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On Tue, Jan 26, 2016 at 12:19 PM, John Doty <jpd AT noqsi DOT com> wrote:
>
> On Jan 26, 2016, at 2:02 PM, Stephan Böttcher <geda AT psjt DOT org> wrote:
>
>> But the first steps should not be "implement b/b vias" or "allow more
>> than one pair of outer layers".  It should be something like "expess
>> Elements and Vias as subclasses of generic containers that can include
>> anything".
>
> +1

So you guys actually want a more strongly typed system.  That's pretty
different from gschem, which uses attributes (duck types) for most
things.

Regarding making arbitrary containers, I'm not convinced its a good
idea.  Entire layouts serve much the same purpose and can easily be
copied about.  Admittedly I'm not convinced the other way either,
since I generally prefer types to attributes.  However, there's no
denying attributes are easier and can be added incrementally.  Type
hierarchies have the further disadvantage of being closed to user
extension in C (and effectively so in most other languages as well).

Britton

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