Module:Demo

local p = {}

--creates a frame object that cannot access any of the parent's args --unless a table containing a list keys of not to inherit is provided function disinherit(frame, onlyTheseKeys) local parent = frame:getParent or frame local orphan = parent:newChild{} orphan.getParent = parent.getParent --returns nil orphan.args = {} if onlyTheseKeys then local family = {parent, frame} for f = 1, 2 do			for k, v in pairs(family[f] and family[f].args or {}) do				orphan.args[k] = orphan.args[k] or v			end end parent.args = mw.clone(orphan.args) setmetatable(orphan.args, nil) for _, k in ipairs(onlyTheseKeys) do			rawset(orphan.args, k, nil) end end return orphan, parent end

function getSeparator(args, default) local br = tonumber(args.br) and (' '):rep(args.br) or args.br	local sep = args.sep or br or default return #sep > 0 and ' ' .. sep .. ' ' or sep end

function p.get(frame, arg, passArgs) local orphan, frame = disinherit(frame, passArgs and {arg or 1}) local code = frame.args[arg or 1] or '' if code:match'UNIQ%-%-nowiki' then code = mw.text.unstripNoWiki(code) :gsub('&lt;', '<') :gsub('&gt;', '>') :gsub('&quot;', '"')			-- Replace `&#125;%-` with `}-` because of some server quirk leading to			-- =mw.text.unstripNoWiki(mw.getCurrentFrame:preprocess(' }- '))			-- outputting `&#125;-` instead of `}-`, while it's ok with ` } - `			:gsub('&#125;%-', '}-')			-- The same with `-&#123;`			:gsub('%-&#123;', '-{')	end	local kill_categories = frame.args.demo_kill_categories or frame.args.nocat	return {		source = code,		output = orphan:preprocess(code):gsub(kill_categories and '%[%[Category.-%]%]' or , ),		frame = frame	} end

function p.main(frame, demoTable) local show = demoTable or p.get(frame) local args = show.frame.args if show[args.result_arg] then return show[args.result_arg] end local yesno = require('Module:Yesno') args.reverse = yesno(args.reverse, false) args.sep = getSeparator(args, '') local source = frame:extensionTag{ name = 'syntaxhighlight', args = { lang = 'wikitext', style = args.style },		content = show.source }	return args.reverse and show.output .. args.sep .. source or source .. args.sep .. show.output end

-- Alternate function to return an inline result function p.inline(frame, demoTable) local show = demoTable or p.get(frame) local args = show.frame.args if show[args.result_arg] then return show[args.result_arg] end local yesno = require('Module:Yesno') args.reverse = yesno(args.reverse, false) args.sep = getSeparator(args, args.reverse and '←' or '→') local source = frame:extensionTag{ name = 'syntaxhighlight', args = { lang = 'wikitext', inline = true, style = args.style },		content = show.source }	return args.reverse and show.output .. args.sep .. source or source .. args.sep .. show.output end

--passing of args into other module without preprocessing function p.module(frame) local orphan, frame = disinherit(frame, {		'demo_template',		'demo_module',		'demo_module_func',		'demo_main',		'demo_sep',		'demo_br',		'demo_result_arg',		'demo_kill_categories',		'nocat'	}) local template = frame.args.demo_template and 'Template:'..frame.args.demo_template local demoFunc = frame.args.demo_module_func or 'main\n' local demoModule = require('Module:' .. frame.args.demo_module)[demoFunc:match('^%s*(.-)%s*$')] frame.args.br, frame.args.result_arg = frame.args.demo_sep or frame.args.demo_br, frame.args.demo_result_arg local kill_categories = frame.args.demo_kill_categories or frame.args.nocat if demoModule then local named = {insert = function(self, ...) table.insert(self, ...) return self end} local source = {insert = named.insert, '{{', frame.args.demo_template or frame.args.demo_module, '\n'} if not template then source:insert(2, '#invoke:'):insert(4, '|'):insert(5, demoFunc) end local insertNamed = #source + 1 for k, v in pairs(orphan.args) do			local nan, insert = type(k) ~= 'number', {v} local target = nan and named or source target:insert'|' if nan then target:insert(k):insert'=':insert'\n' table.insert(insert, 1, #target) end target:insert(unpack(insert)) local nowiki = v:match('nowiki') if nowiki or v:match('') then orphan.args[k] = frame:preprocess(nowiki and mw.text.unstripNoWiki(v) or v)			end end source:insert'}}' table.insert(source, insertNamed, table.concat(named)) return p.main(orphan, {			source = table.concat(source), "<>'|=~",			output = tostring(demoModule(orphan)):gsub(kill_categories and '%[%[Category.-%]%]' or , ),			frame = frame		}) else return "ERROR: Invalid module function: "..demoFunc end end

return p