yesno

-- Function allowing for consistent treatment of boolean-like wikitext input. -- It works similarly to the template {{yesno}}.  return function (val, default, emptyDefault) -- If your wiki uses non-ascii characters for any of "yes", "no", etc., you -- should replace "val:lower()" with "mw.ustring.lower(val)" in the -- following line. val = type(val) == 'string' and val:lower() or val if val == nil then return nil elseif val == true  or val == 'yes' or val == 'y' or val == 'oui' or val == 'o' or val == 'true' or tonumber(val) == 1 then return true elseif val == false or val == 'no' or val == 'n' or val == 'non' or val == 'false' or tonumber(val) == 0 then return false elseif emptyDefault ~= nil and type(val) == 'string' and val:match( '^%s*$' ) then return emptyDefault else return default end end