Difference between revisions of "Module:If empty"

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m (1 revision imported)
(update from sandbox, per Template talk:If empty#Backcompat)
Line 4: Line 4:
 
local args = require('Module:Arguments').getArgs(frame, {wrappers = 'Template:If empty', removeBlanks = false})
 
local args = require('Module:Arguments').getArgs(frame, {wrappers = 'Template:If empty', removeBlanks = false})
   
  +
local lastk = 0
-- 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
 
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
  +
lastk = k
 
end
 
end
  +
 
end
 
end
   

Revision as of 04:38, 6 May 2022

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})

	local lastk = 0
	for k,v in ipairs(args) do
		if v ~= '' then
			return v
		end
		lastk = k
	end

end

return p