I'm writing a filter which walks a table read from CSV, which are all read
in as literal strings by Pandoc, and parses them with pandoc.read. In order
to know which format to read the filter inspects a metadata field expecting
the value to be the one to pass as second argument to pandoc.read. However
there is easy way to validate that value before calling pandoc.read. To be
sure I could create a table mapping every name returned by
--list-input-formats to `true`, but it would seem that rather than every
filter which needs this information (and conversely output formats for
pandoc.write) maintaining its own lookup it would be better if the Lua API
provided it, either as a pair of functions returning true if their argument
is a valid format, or as (objects which act as) tables (sets) with valid
formats mapped to true, which is something I assume Pandoc already has
provision for internally. Does this seem like a good idea, or is my use
case with the filter taking this info from the user too unusual to warrant
this?

-- 
You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/CADAJKhCzFH-VpPV%3DsnQkrhi8g_aCXYu4RDp0ghw3Pd8VmCXjzA%40mail.gmail.com.