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From: Kai-Martin Knaak <kmk AT familieknaak DOT de>
Subject: Re: Objects of objects (was Re: [geda-user] The state of gEDA/gaf (Was gEDA/PCBs diversity, Was: Pin hole size))
Date: Thu, 01 Nov 2012 01:05:09 +0100
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John Doty wrote:

> On Oct 31, 2012, at 3:07 AM, Karl Hammar wrote:

For some reason, Karls post does not show in my reader...


>>> The idea that objects are composed of objects composed of objects,
>>> ... is missing.
>> ...
>>
>> This kind of recursion is missing from gschem also, or rather from
>> the sch/sym file formats.

You _can_ put symbols into symbols. You can even put schematics into 
symbols. My library at geda-symbols.org contains a section which 
contains some often needed modules as ready made "blocks". However, 
gschem would always treat this as a single symbol. There is no way to 
change its inner parts. To actually use these blocks, you have to add 
them with the option "include as individual objects".

Real recursion would involve symbols that contain themselves. This can 
only be meaningful if there is some kind of break condition. Infinite 
recursion works only in pure mathematics... Can you give an example of 
a use case where real recursion with a break condition would be 
useful?

---<)kaimartin(>---
-- 
Kai-Martin Knaak