Difference between revisions of "Module:If empty"
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m (1 revision imported) |
(update from sandbox, per Template talk:If empty#Backcompat) |
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| 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}) |
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| + | local lastk = 0 |
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| − | -- For backwards compatibility reasons, the first 8 parameters can be unset instead of being blank, |
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| − | -- even though there's really no legitimate use case for this. At some point, this will be removed. |
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| − | local lowestNil = math.huge |
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| − | for i = 8,1,-1 do |
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| − | if args[i] == nil then |
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| − | args[i] = '' |
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| − | lowestNil = i |
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| − | end |
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| − | end |
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| − | |||
for k,v in ipairs(args) do |
for k,v in ipairs(args) do |
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if v ~= '' then |
if v ~= '' then |
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| − | if lowestNil < k then |
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| − | -- If any uses of this template depend on the behavior above, add them to a tracking category. |
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| − | -- This is a rather fragile, convoluted, hacky way to do it, but it ensures that this module's output won't be modified |
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| − | -- by it. |
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| − | frame:extensionTag('ref', '[[Category:Instances of Template:If_empty missing arguments]]', {group = 'TrackingCategory'}) |
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| − | frame:extensionTag('references', '', {group = 'TrackingCategory'}) |
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| − | end |
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return v |
return v |
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end |
end |
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| + | lastk = k |
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end |
end |
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| + | |||
end |
end |
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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