Module:Tmpl
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Documentation for this module may be created at Module:Tmpl/doc
-- This is a helper module for {{tmpl}}
require('strict')
-- The trailing `[^0-9]?` ensures that `$10` doesn't potentially change
-- from being treated as `${1}0` to being treated as `${10}`
-- if the number of supported parameters is ever expanded:
local PATTERN = "%$([1-9])[^0-9]?"
local this = {}
function this.renderTmpl(frame)
local args = frame.args
local pargs = (frame:getParent() or {}).args
local input = pargs[0] or ''
local result = {}
local prevPos = 1
do
local startPos, _, k
while true do
startPos, _, k = string.find(input, PATTERN, prevPos)
if (not startPos) then break end
table.insert(result, string.sub(input, prevPos, startPos - 1))
local n = tonumber(k)
local r = pargs[n]
if (r) then
table.insert(result, r)
else
table.insert(result, '$' .. n)
end
prevPos = startPos + #k + 1
end
end
table.insert(result, string.sub(input, prevPos))
return table.concat(result)
end
return this