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From:	"Peter Clifton (petercjclifton AT googlemail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date:	Sun, 12 Feb 2017 12:02:19 +0000
Message-ID:	<CAJXU7q8Oa58Dx=PFvi-+-s-m=j9ze2R6rMSY4cBO-VF2Ev1uug@mail.gmail.com>
Subject:	Re: [geda-user] gschem gnetlist bug/feature
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Thanks,

It has been a while - and I had forgotten about the internal "graphical"
netlist.

Peter


On 12 Feb 2017 11:58, "Vladimir Zhbanov (vzhbanov AT gmail DOT com) [via
geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> wrote:

On Sat, Feb 11, 2017 at 09:46:04AM +0000, Peter Clifton (
petercjclifton AT googlemail DOT com) [via geda-user AT delorie DOT com] wrote:
...

> That seems somewhat counter to my recollection. I thought graphical=1
> caused a symbol to be ignored completely? (Has this changed, or my
> recollection faulty?)

Here
  http://wiki.geda-project.org/geda:gnetlist_scheme_primitives
you can find a "legacy" gnetlist function
 'gnetlist:graphical-objs-in-net-with-attrib-get-attrib'
which was in gnetlist for years. It is used in the drc2 backend:
  - for nc symbols to ensure pins connected to such symbols aren't
    reflected in netlists;
  - and to prevent checking "if pin is not driven" if it has the
    "DontCheckIfDriven" drc directive for those cases where the
    user wants to check if there is no connections of non-compatible
    pin-types and disable some pins from this check.

--
  Vladimir

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<div dir=3D"auto"><div>Thanks,<div dir=3D"auto"><br></div><div dir=3D"auto"=
>It has been a while - and I had forgotten about the internal &quot;graphic=
al&quot; netlist.</div><div dir=3D"auto"><br></div><div dir=3D"auto">Peter<=
/div><br><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On 12 Fe=
b 2017 11:58, &quot;Vladimir Zhbanov (<a href=3D"mailto:vzhbanov AT gmail DOT com"=
>vzhbanov AT gmail DOT com</a>) [via <a href=3D"mailto:geda-user AT delorie DOT com">geda=
-user AT delorie DOT com</a>]&quot; &lt;<a href=3D"mailto:geda-user AT delorie DOT com">g=
eda-user AT delorie DOT com</a>&gt; wrote:<br type=3D"attribution"><blockquote cla=
ss=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-=
left:1ex">On Sat, Feb 11, 2017 at 09:46:04AM +0000, Peter Clifton (<a href=
=3D"mailto:petercjclifton AT googlemail DOT com">petercjclifton AT googlemail DOT com</a>=
<wbr>) [via <a href=3D"mailto:geda-user AT delorie DOT com">geda-user AT delorie DOT com<=
/a>] wrote:<br>
...<br>
<div class=3D"quoted-text"><br>
&gt; That seems somewhat counter to my recollection. I thought graphical=3D=
1<br>
&gt; caused a symbol to be ignored completely? (Has this changed, or my<br>
&gt; recollection faulty?)<br>
<br>
</div>Here<br>
=C2=A0 <a href=3D"http://wiki.geda-project.org/geda:gnetlist_scheme_primiti=
ves" rel=3D"noreferrer" target=3D"_blank">http://wiki.geda-project.org/<wbr=
>geda:gnetlist_scheme_<wbr>primitives</a><br>
you can find a &quot;legacy&quot; gnetlist function<br>
=C2=A0&#39;gnetlist:graphical-objs-in-<wbr>net-with-attrib-get-attrib&#39;<=
br>
which was in gnetlist for years. It is used in the drc2 backend:<br>
=C2=A0 - for nc symbols to ensure pins connected to such symbols aren&#39;t=
<br>
=C2=A0 =C2=A0 reflected in netlists;<br>
=C2=A0 - and to prevent checking &quot;if pin is not driven&quot; if it has=
 the<br>
=C2=A0 =C2=A0 &quot;DontCheckIfDriven&quot; drc directive for those cases w=
here the<br>
=C2=A0 =C2=A0 user wants to check if there is no connections of non-compati=
ble<br>
=C2=A0 =C2=A0 pin-types and disable some pins from this check.<br>
<font color=3D"#888888"><br>
--<br>
=C2=A0 Vladimir<br>
</font></blockquote></div><br></div></div></div>

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