Editing Module:Yesno

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-- Function allowing for consistent treatment of boolean-like wikitext input.
local p = {}
-- It works similarly to the template {{yesno}}.
 
function p.yesno( frame )
return function (val, default)
-- If your wiki uses non-ascii characters for any of "yes", "no", etc., you
    local retvals = {
-- should replace "val:lower()" with "mw.ustring.lower(val)" in the
        yes  = "yes",
-- following line.
        no    = "",
val = type(val) == 'string' and val:lower() or val
        ["¬"] = ""
if val == nil then
    }
return nil
elseif val == true
    local any = false
or val == 'yes'
    for k,v in pairs( frame.args ) do
or val == 'y'
        any = true
or val == 'true'
        retvals[k] = v
or val == 't'
    end
or val == 'on'
or tonumber(val) == 1
    val = frame.args[1]
then
return true
    if (val == nil and not any) or val == '¬' then
elseif val == false
        return retvals['¬']
or val == 'no'
    end
or val == 'n'
or val == 'false'
    val = (val or ''):lower()
or val == 'f'
    val = val:match'^%s*(.*%S)' or ''
or val == 'off'
or tonumber(val) == 0
    if val == '' then
then
        return retvals['blank'] ~= nil and retvals['blank'] or retvals['no']
return false
    elseif val == 'n' or val == 'no' or val == '0' then
else
        return retvals['no']
return default
    elseif val == 'y' or val == 'yes' or val == '1' or retvals['def'] == nil then
end
        return retvals['yes']
    else
        return retvals['def']
    end
end
end
return p
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