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From: Chris Smith <space DOT dandy AT icloud DOT com>
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Subject: Re: [geda-user] FOSDEM
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Date: Sat, 07 Feb 2015 20:44:34 +0000
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> On 7 Feb 2015, at 14:19, John Doty <jpd AT noqsi DOT com> wrote:
> 
>> On Feb 7, 2015, at 1:45 AM, Chris Smith <space DOT dandy AT icloud DOT com> wrote:
>> 
>> So load the Lua library in your language of choice and go wild.
> 
> So, there’s a Lua library for sed? AWK? Forth? Mathematica?

It's just a text file and AWK and sed are text processors. Why would they need a library to help them? Textual manipulation makes sense for a lot of problems and I don't see anything that should make that any more difficult. However there are problems for which it is much more sensible to manipulate the data as a structured hierarchy of objects. That's where the use of Lua can help and where the library can be of benefit to those who don't want to roll their own parser.

There are three aspects to using Lua:

1) define the language features (execution, data, etc) that will be supported for each domain (configuration, schematics, symbols);
2) define how the data will be structured; and
3) define the 'coding style' (use of white space, etc) that will be used.

I don't see any problem with directing 2) and 3) such that they are conducive to line based processing.

> Free-form formats aren’t so easy with line-oriented tools. XML, of course, has the same problem. But we don’t have to reinvent the gEDA schematic/symbol format at all. Parsing is trivial.

Exactly. Parsing is trivial, and we still get to keep that.

Chris