“Module:StringTools”的意思、由来-开放百科全书

词条

Module:StringTools

释义

local p = {}

--[=[

Similar to gmatch, but it returns the count of the match in addition to the

list of captures, something like ipairs().

If the pattern doesn't contain any captures, the whole match is returned.

Invoke thus:

for i, whole_match in require("Module:string").imatch(text, pattern) do

[ do something with i and whole_match ]

end

for i, capture1[, capture2[, capture3[, ...]]] in require("Module:string").imatch(text, pattern) do

[ do something with i and capture1 ]

end

]=]

function p.imatch(text, pattern, start, plain)

local i = 0

local pos = start or 0

if not mw.ustring.find(pattern, "%b()") then

pattern = "(" .. pattern .. ")"

end

return function()

i = i + 1

local return_values = { mw.ustring.find(text, pattern, pos, plain) }

local j = return_values[2]

if #return_values > 0 then

pos = j + 1

-- Skip the first two returned values, which are the indices of the

-- whole match.

return i, unpack(return_values, 3)

else

return nil, nil

end

return p

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