Re: gEDA-user: Schematic Level DRC DIscussion

[Dave N6NZ <n6nz@xxxxxxxx>]

Seems to me that if there is a good guile API into the database, then a 
guile-based rule engine is the way to implement generalized DRC.  A DRC 
rule specification language can compile into a guile-based rule database 
that executes on the DRC engine.

-dave

Steve Meier wrote:
> Prolog yep once upon a time. From my view point there is already a
> sizable investment in scheme by the geda users and it seems good enough.
> I havn't time to do more then I already am and so I plan to finsh what i
> started. Others are of course more then free to rewrite or add a prolog
> layer or anything else they like.
> 
> Steve meier
> 
> 
> Dave N6NZ wrote:
>> Chris Albertson wrote:
>>   
>>> Have you looked at Prolog?  
>>>     
>> Yes, indeed.  Quite fluent at one time in the past.
>>
>> For DRC, I envision a language specific to the problem domain of 
>> specifying DRC rules.  It might compile into Prolog, or guile, or 
>> whatever, but the typical user is not going to want to learn Prolog 
>> simply to add a couple of in-house or technology-specific design rules 
>> to a rule database.
>>
>> Guile and Prolog serve the same purpose as assembly language.
>>
>> -dave
>>
>>
>>   
>>> People have written very complex programs in Prolog, several so called
>>> "expert systems" 
>>>     
>> People including me.  But a toy one, not a real one.  However, I did 
>> once have the dubious honor of managing a development project heavily 
>> invested in a major production application coded in Prolog.  We moved 
>> off the platform in the end for reasons of code maintainability, and 
>> secondarily performance.
>>
>>   
>>> and it would be a good way to implement features like
>>> autoplacement and autorouting.
>>>     
>> Perhaps, as long as your PC board was under 3 square inches and two 
>> layers, and you don't mind radically suboptimal results.  I'll pass.
>>
>>
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>>
>>   
> 
> 


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