My primitive JSON decoder, which operates by lexically translating
a JSON code to a Lua table literal, now does three things:
1. Unicode codepoints translated, e.g. from \u00e9 to \u{00e9}.
2. List delimiters translated from […] to {…}.
3. Keys translated e.g. from "item": to ["item"]=.
local function json_decode (s)
s = s:gsub("\\u(%d%d%d%d)","\\u{%1}")
local function do_json_list(s,is_list)
if is_list then s = s:sub(2,-2) end
s = s:gsub("(%b[])()",do_json_list)
if is_list then s = '{' .. s ..'}' end
return s
end
local t = load('return '..do_json_list(s):gsub('("[%w_-]-"):','[%1]='))
if t then return t() else return s end
end
Please show me some sample JSON code that this decoder can't handle
properly.
I already know about:
1. Integer overflow. (Thanks, Sean!) --> won't happen
2. JSON null is not Lua nil. --> define a suitable global called 'null'
