Re: Empty headline titles unsupported: Bug?

[David Masterson]

Tom Gillespie <tgbugs@gmail.com> writes:

> Hi all,
>      Here is the 4th (or so) iteration of the grammar for titles that
> I think deals with most of the issues in this thread along with a
> bunch of nasty test cases. The previous attempts can be inspected in
> the git history, but long story short, it is extremely hard to find a
> grammar that follows the principle of least surprise and you have to
> use the tokenizer to ensure that the tags pattern always parses as
> such so that tags don't magically switch to being the title when you
> remove the rest of the contents of the title. The final example
> L1648-L1665 shows many of the things that should parse as tags and do
> with this tokenizer/grammar combination. The key to dealing with the
> ambiguity of empty title and tags vs something that looks like tags
> but parses as a title (which is surprising) is to use the tokenizer to
> greedily recognize tags at the end of the line. This ensures that the
> tags pattern at the end of the line always parses as tags and doesn't
> switch just because the title is empty. Happy to elaborate. Best,
> Tom
>
> https://github.com/tgbugs/laundry/blob/next/laundry/heading.rkt
> https://github.com/tgbugs/laundry/blob/971cf35683cd60156868c12b070c2dd9e19d8d06/laundry/tokenizer.rkt#L98-L140
>
> https://github.com/tgbugs/laundry/blob/971cf35683cd60156868c12b070c2dd9e19d8d06/laundry/test.rkt#L326-L367
> https://github.com/tgbugs/laundry/blob/971cf35683cd60156868c12b070c2dd9e19d8d06/laundry/test.rkt#L400-L558
> https://github.com/tgbugs/laundry/blob/971cf35683cd60156868c12b070c2dd9e19d8d06/laundry/test.rkt#L1298-L1369
> https://github.com/tgbugs/laundry/blob/971cf35683cd60156868c12b070c2dd9e19d8d06/laundry/test.rkt#L1371-L1419
> https://github.com/tgbugs/laundry/blob/971cf35683cd60156868c12b070c2dd9e19d8d06/laundry/test.rkt#L1648-L1665

This looks interesting, but I'm not yet familiar with racket & brag -= I
assume laundry doesn't produce any output from the input Org file other
than some form of "good" or "bad" signal.  True?

-- 
David Masterson