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Module:string/patternEscape - Revision history
2026-04-21T18:21:46Z
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2026-04-21T11:22:50Z
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https://linguifex.com/w/index.php?title=Module:string/patternEscape&diff=494885&oldid=prev
wikt>Theknightwho at 21:20, 21 May 2025
2025-05-21T21:20:25Z
<p></p>
<p><b>New page</b></p><div>local gsub = string.gsub<br />
<br />
local chars<br />
local function get_chars()<br />
chars, get_chars = {<br />
["\000"] = "%z", ["$"] = "%$", ["%"] = "%%", ["("] = "%(", [")"] = "%)",<br />
["*"] = "%*", ["+"] = "%+", ["-"] = "%-", ["."] = "%.", ["?"] = "%?",<br />
["["] = "%[", ["]"] = "%]", ["^"] = "%^",<br />
}, nil<br />
return chars<br />
end<br />
<br />
--[==[Escapes the magic characters used in a pattern: {$%()*+-.?[]^}, and converts the null character to {%z}. For example, {"^$()%.[]*+-?\0"} becomes {"%^%$%(%)%%%.%[%]%*%+%-%?%z"}. This is necessary when constructing a pattern involving arbitrary text (e.g. from user input).]==]<br />
return function(str)<br />
return (gsub(str, "[%z$%%()*+%-.?[%]^]", chars or get_chars()))<br />
end</div>
wikt>Theknightwho