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Subject: Re: [geda-user] Can an attribute be attached to text for later inclusion in gnetlist backend?
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From: John Doty <jpd AT noqsi DOT com>
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Date: Tue, 6 Sep 2016 16:30:10 -0600
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On Sep 6, 2016, at 3:34 PM, Vladimir Zhbanov (vzhbanov AT gmail DOT com) [via =
geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote:

> Having been thinking before of
> all the ambiguous attribute names we have in geda where each
> gnetlist backend has its own vision on their use, now I think
> every one of them being non-compatible with others should have a
> different backend-specific name.

The way I do it in gnet-spice-noqsi is to have spice-specific attributes =
spice-prototype, spice-prolog, and spice-epilog. Those feed a simple =
macro expander that can *refer* to the old overloaded attribute names. =
There are built-in defaults for the spice-prototype attribute selected =
by the device attribute.
So, for example, the default prototype for device=3DRESISTOR is

R? %pinseq value@ model-name@ spice-args@ w=3D l=3D area=3D temp=3D=93

This does the following:

1. Insures the refdes starts with R.

2. Uses pinseq to order the connections, as in the past.

3. Uses the value attribute for the resistance, as in the past.

4. Picks up other optional attributes.

The user can override this with a spice-prototype attribute to get any =
output desired. This approach avoids getting in the way of other back =
ends, while most often doing the =93right thing=94 by default.

John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd AT noqsi DOT com



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