Module:Yesno

local p = {}

function p.yesno(frame)

-- defaults local retvals = { yes  = "yes", no   = "", ["¬"] = ""   }

-- Allow arguments to override defaults. -- 'any' tracks the presence of any arguments at all. local args = frame.args local any = false for k,v in pairs(args) do       any = true retvals[k] = v   end -- If there are no arguments, try and get them from the parent frame. if any == false then local pframe = frame:getParent args = pframe.args for k,v in pairs(args) do           any = true retvals[k] = v       end end

val = args[1]

-- First deal with the case if val is nil, then deal with other cases. if val == nil then return retvals['¬'] end

val = val:lower         -- Coerce to blank if nil; make lowercase. val = val:match'^%s*(.*%S)' or '' -- Trim whitespace.

if val == '' then return retvals['blank'] or retvals['no'] elseif val == 'n' or val == 'no' or val == '0' then return retvals['no'] elseif val == 'y' or val == 'yes' or val == '1' or retvals['def'] == nil then return retvals['yes'] else return retvals['def'] end end

return p