Module:ArgRest/sandbox

local p = {}

function p.main(frame) -- Undo sanitization: local code = frame.args[1] or '' if code:match'nowiki' then code = mw.text.unstripNoWiki(code) else error(" missing from first parameter") end -- Angle brackets still remain santiized; unsanitize them local wikitext = code:gsub('&lt;', '<'):gsub('&gt;', '>') local secondParam = frame.args[2] local start = tonumber(secondParam:match('%d+')) -- Extract the first number from the second parameter local result = '' assert(secondParam, "second parameter missing") -- Helper for replaceTripleBraces: reads through "default" to find aliases and the actual default local function recurseOverBraces(str2, i)   	local alias, _, default = str2:match("([^{}<>|]+)(|?)(.*)") if _ == "" then default = nil end if default and default:match("") then return frame:getParent.args[alias:gsub("%d+", tostring(i))] or recurseOverBraces(default:match(""):sub(1, -2), i)   	else return frame:getParent.args[alias:gsub("%d+", tostring(i))] or default or "" end end local function replaceTripleBraces(str, i) -- extract corresponding arguments from the parent function. Since %b{} doesn't allow fine control, we must do a second search within the matched string local parameter, _, default = str:match("([^{}<>|]+)(|?)(.*)") if _ == "" then default = nil elseif default:match("") then default = recurseOverBraces(default:match(""):sub(1, -2), i)   	end return frame:getParent.args[parameter:gsub("%d+", tostring(i))] or default or "" end for i = start, math.huge do       -- Check if the parameter is defined. TODO: make this check for aliases if not frame:getParent.args[secondParam:gsub('%d+', tostring(i))] then break end -- local processed = wikitext:gsub("", function(a, b, c) return replaceTripleBraces(a, b, c, i) end) local processed = wikitext:gsub("%{%{(%b{})%}%}", function(a) return replaceTripleBraces(a:sub(1, -2), i) end) --matches everything in triple braces result = result .. processed end return frame:preprocess(result) end

return p