Module:Yesno

-- Function allowing for consistent treatment of boolean-like wikitext input.

-- It works similarly to the template {{yesno}}.

return function (val, default)

-- 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 == 'true'

or val == 't'

or val == 'on'

or tonumber(val) == 1

then

return true

elseif val == false

or val == 'no'

or val == 'n'

or val == 'false'

or val == 'f'

or val == 'off'

or tonumber(val) == 0

then

return false

else

return default

end