Hi, have you checked LTIN?
Lua Table Interop Notation ・ luvit/luvit Wiki
https://github.com/luvit/luvit/wiki/Lua-Table-Interop-Notation
Why aren't boolean values true and false accepted in LTIN?
In JSON they exist, and can be very useful.
Also, nil should be an acceptable value, although not completely necessary.
I suggest also to specify how to deal with NaN and +/- Inf numbers.
These are missing in JSON, and this is IMHO something very annoying.
--
-- Patrick Rapin
-- coauthor of "Le guide de Lua et ses applications", D-BookeR
