Re: Markdown in JSON (was: Parse metadata in defaults files as Markdown?)

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

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

> how and when does `pandoc.json.decode()` parse its argument into AST
> elements?

Decoding to AST elements if possible is the default, but that can be
disabled by passing `false` as the second argument:

     > pandoc.json.decode('{"t":"Str", "c":"Hello"}')
     Str "Hello"
     > type(pandoc.json.decode('{"t":"Str", "c":"Hello"}'))
     userdata

     > pandoc.json.decode('{"t":"Str", "c":"Hello"}', false)
     table: 0xc742c60
     > type(pandoc.json.decode('{"t":"Str", "c":"Hello"}', false))
     table

The "how" is rather simple: the function tries to parse the input as
Inline, Block, Pandoc, Inlines, and Blocks, in that order. If one of
those attempts succeeds, then the respective AST element is returned.
Otherwise it falls back to returning the value as a plain Lua object.


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