Module:If empty: Difference between revisions
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meta>Jackmcbarn add comment |
meta>Jackmcbarn add a tracking category to any pages that use this behavior |
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Line 6: | Line 6: | ||
-- For backwards compatibility reasons, the first 9 parameters can be unset instead of being blank, | -- For backwards compatibility reasons, the first 9 parameters can be unset instead of being blank, | ||
-- even though there's really no legitimate use case for this. At some point, this will be removed. | -- even though there's really no legitimate use case for this. At some point, this will be removed. | ||
for i = 1, | local lowestNil = math.huge | ||
for i = 9,1,-1 do | |||
if args[i] == nil then | if args[i] == nil then | ||
args[i] = '' | args[i] = '' | ||
lowestNil = i | |||
end | end | ||
end | end | ||
for | for k,v in ipairs(args) do | ||
if v ~= '' then | if v ~= '' then | ||
if lowestNil < k then | |||
-- If any uses of this template depend on the behavior above, add them to a tracking category. | |||
-- This is a rather fragile, convoluted, hacky way to do it, but it ensures that this module's output won't be modified | |||
-- by it. | |||
frame:extensionTag('ref', '[[Category:Instances of Template:If_empty missing arguments]]', {group = 'TrackingCategory'}) | |||
frame:extensionTag('references', '', {group = 'TrackingCategory'}) | |||
end | |||
return v | return v | ||
end | end |
Revision as of 21:37, 23 December 2014
Documentation for this module may be created at Module:If empty/doc
local p = {}
function p.main(frame)
local args = require('Module:Arguments').getArgs(frame, {wrappers = 'Template:If empty', removeBlanks = false})
-- For backwards compatibility reasons, the first 9 parameters can be unset instead of being blank,
-- even though there's really no legitimate use case for this. At some point, this will be removed.
local lowestNil = math.huge
for i = 9,1,-1 do
if args[i] == nil then
args[i] = ''
lowestNil = i
end
end
for k,v in ipairs(args) do
if v ~= '' then
if lowestNil < k then
-- If any uses of this template depend on the behavior above, add them to a tracking category.
-- This is a rather fragile, convoluted, hacky way to do it, but it ensures that this module's output won't be modified
-- by it.
frame:extensionTag('ref', '[[Category:Instances of Template:If_empty missing arguments]]', {group = 'TrackingCategory'})
frame:extensionTag('references', '', {group = 'TrackingCategory'})
end
return v
end
end
end
return p