Re: Lua filters: Extensions with pandoc.read?

[Albert Krewinkel <albert+pandoc-9EawChwDxG8hFhg+JK9F0w@public.gmane.org>]

BPJ <melroch-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:

> Den tis 4 okt. 2022 11:52Albert Krewinkel <albert+pandoc-9EawChwDxG8hFhg+JK9F0w@public.gmane.org> skrev:
>>    -- absolute set of extensions
>>    { format = 'docx',
>>    , extensions = {'auto_identifiers', 'styles', 'citations'}
>>    }
>
> This `extensions` field would be identical to the `enable` field,
> wouldn't it, or would it mean that all default extensions not
> explicitly mentioned in it would be disabled? And what would happen if
> someone uses it together with `disable` and/or `enable`; which would
> be ignored, or would it be an error condition?

Mmmh, good point. My initial idea was to use the format's default
extension when no `extensions` field is given. But that's confusing,
because now omitting the `extensions` field can have multiple meanings
("fall back to reader options" or "use default extensions"), depending
on which other fields are set. Not a good interface.

Maybe extensions should be Lua objects with some convenient methods:

``` lua
{ format: 'markdown',
  extensions: pandoc.extensions.default('markdown'):disable{'smart'}
}
```

Bit more typing, but much cleaner.

> If the format can be a table as described I think it is better to
> always ignore the format/extension info in the ReaderOptions — and
> say so clearly in the documentation!

Yes, I think you are right.

> Also I assume that `pandoc.write()` would behave analogously?

Definitely, `read` and `write` should stay symmetric.

-- 
Albert Krewinkel
GPG: 8eed e3e2 e8c5 6f18 81fe  e836 388d c0b2 1f63 1124

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