Module:A or an

local p = {} local words = mw.loadData('Module:A or an/words')

local lcVChars = 'aeiouà-æè-ïò-öø-üāăąēĕėęěĩīĭįıĳōŏőœũūŭůűų' local ucVvChars = 'AEFHILMNORSXÀ-ÆÈ-ÏÒ-ÖØĀĂĄĒĔĖĘĚĨĪĬĮıĲŌŎŐŒÑĤĦĹĻĽĿŁŃŅŇŊŔŖŘŚŜŞ'

local function findWord(s, t)	for i, v in ipairs(t) do if mw.ustring.find(s, '^' .. v .. '$') then return true end end end

function p._main(args) local s = args[1] and mw.text.trim(args[1]) local pron = 'a'	local ret = '' if s and s ~= '' then local origStr = s		s = mw.ustring.gsub(s, ']->', '') -- Remove HTML tags s = mw.ustring.gsub(s, '%[%[[^%|]+%|(..-)%]%]', '%1') -- Remove wikilinks		s = mw.ustring.gsub(mw.ustring.gsub(s, '%[%[', ), '%]%]', )		s = mw.ustring.gsub(s, '^["%$\'%(<%[%{¢-¥₠-₿]+', '') -- Strip some symbols at the beginning		s = mw.ustring.match(s, '^%.?[0-9%u%l]+') or s -- Extract the first word		if mw.ustring.find(s, '^[0-9]') then -- It begins with a number			s = mw.ustring.match(s, '^[0-9]+') -- Extract the number			if findWord(s, words.vNums) then -- '18' etc.				pron = 'an'			end		elseif mw.ustring.match(s, '^[0-9%u]+$') then -- It looks like an acronym			if mw.ustring.find(s, '^[' .. ucVvChars .. ']')				and not findWord(s, words.cvAcronyms) -- Exclude 'NASA' etc.				or findWord(s, words.vvAcronyms) -- 'UNRWA' etc.			then				pron = 'an'			end		else			s = mw.ustring.lower(s) -- Uncapitalize			if mw.ustring.find(s, '^['.. lcVChars .. ']') then -- It begins with a vowel				if not findWord(s, words.vcWords) -- Exclude 'euro' etc.					or findWord(s, words.vvWords) -- But not 'Euler' etc.				then					pron = 'an'				end			elseif args.variety and mw.ustring.lower(args.variety) == 'us' -- 'herb' etc.				and findWord(s, words.cvWordsUS)				or findWord(s, words.cvWords) -- 'hour' etc.			then				pron = 'an'			end		end		ret = pron .. ' ' .. origStr	end	return ret end

function p.main(frame) return p._main(frame:getParent.args) end

return p