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2025-11-04T17:47:19Z

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wikt>SurjectionBot: (bot) slight optimization to 5.2 compat: prefer unpack to table.unpack

2025-04-24T12:26:46Z

(bot) slight optimization to 5.2 compat: prefer unpack to table.unpack

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-- Prevent substitution.
if mw.isSubsting() then
return require("Module:unsubst")
end

local export = {}

local m_template_parser = require("Module:template parser")

local display_parameter = m_template_parser.displayParameter
local process_params = require("Module:parameters").process
local template_link = m_template_parser.templateLink
local unpack = unpack or table.unpack -- Lua 5.2 compatibility
local wikitag_link = m_template_parser.wikitagLink

local function get_offset_template_args(frame)
-- Process parameters with the return_unknown flag set. `title` contains
-- the title at key 1; everything else goes in `args`.
local title, args = process_params(frame:getParent().args, {
[1] = {required = true, allow_empty = true, no_trim = true}
}, true)
title = title[1]
-- Shift all implicit arguments down by 1. Non-sequential numbered
-- parameters don't get shifted; however, this offset means that if the
-- input contains (e.g.) {{tl|l|en|3=alt}}, representing {{l|en|3=alt}},
-- the parameter at 3= is instead treated as sequential by this module,
-- because it's indistinguishable from {{tl|l|en|alt}}, which represents
-- {{l|en|alt}}. On the other hand, {{tl|l|en|4=tr}} is handled correctly,
-- because there's still a gap before 4=.
-- Unfortunately, there's no way to know the original input, so
-- there's no clear way to fix this; the only difference is that explicit
-- parameters have whitespace trimmed from their values while implicit ones
-- don't, but we can't assume that every input with no whitespace was given
-- with explicit numbering.
-- This also causes bigger problems for any parser functions which treat
-- their inputs as arrays, or in some other nonstandard way (e.g.
-- {{#IF:foo|bar=baz|qux}} treats "bar=baz" as parameter 1). Without
-- knowing the original input, these can't be reconstructed accurately.
-- The way around this is to use <nowiki> tags in the input, since this
-- module won't unstrip them by design.
local i = 2
repeat
local arg = args[i]
args[i - 1] = arg
i = i + 1
until arg == nil
return title, args
end

function export.template_link_t(frame)
local iargs = process_params(frame.args, {
["annotate"] = true,
["nolink"] = {type = "boolean"},
})
-- iargs.annotate allows a template to specify the title, so the input
-- arguments will match the output.
local title = iargs.annotate
if title then
return template_link(title, frame:getParent().args, iargs.nolink)
end
-- Otherwise, get template arguments offset by 1.
local args
title, args = get_offset_template_args(frame)
return template_link(title, args, iargs.nolink)
end

function export.template_demo_t(frame)
local title, args = get_offset_template_args(frame)
return template_link(title, args) .. " ⇒<br style=\"line-height: 200%;\" />" .. frame:expandTemplate{title = title, args = args}
end

function export.parameter_t(frame)
return display_parameter(unpack(process_params(frame:getParent().args, {
[1] = {required = true, allow_empty = true, no_trim = true},
[2] = {allow_empty = true, no_trim = true},
})))
end

function export.wikitag_link_t(frame)
return wikitag_link(process_params(frame:getParent().args, {
[1] = {required = true, allow_empty = true, no_trim = true}
})[1])
end

return export

Module:template parser/templates - Revision history

Sware: 1 revision imported

wikt>SurjectionBot: (bot) slight optimization to 5.2 compat: prefer unpack to table.unpack