Difference between revisions of "Module:If empty"

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blackwiki>Jackmcbarn
(actually, only the first 8 need this check)
blackwiki>Jackmcbarn
(use Lua per protected edit request)
Line 1: Line 1:
local p = {}
+
<includeonly>{{#invoke:If empty|main}}</includeonly><noinclude>{{Documentation}}</noinclude>
 
 
function p.main(frame)
 
local args = require('Module:Arguments').getArgs(frame, {wrappers = 'Template:If empty', removeBlanks = false})
 
 
 
-- For backwards compatibility reasons, the first 8 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 = 8,1,-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
 

Revision as of 21:57, 23 December 2014

50px Module documentation[view] [edit] [history] [purge]

This module supports Template:If empty.

Tracking/maintenance category