Module:string utilities
- De neikommende dokumintaasje stiet op Module:string utilities/dokumintaasje. [bewurkje]
Oernommen fan en:Module:string utilities.
local module_name = "string_utilities" local export = {} local format_escapes = { ["op"] = "{", ["cl"] = "}", } function export.format(str, tbl) return (string.gsub(str, "{(\\?)((\\?)[^{}]*)}", function (p1, name, p2) if #p1 + #p2 == 1 then return format_escapes[name] or error(module_name .. ".format: unrecognized escape sequence '{\\" .. name .. "}'") else return tbl[name] or error(module_name .. ".format: '" .. name .. "' not found in table") end end)) end -- Reimplementation of mw.ustring.split() that includes any capturing -- groups in the splitting pattern. This works like Python's re.split() -- function, except that it has Lua's behavior when the split pattern -- is empty (i.e. advancing by one character at a time; Python returns the -- whole remainder of the string). function export.capturing_split(str, pattern) local ret = {} -- (.-) corresponds to (.*?) in Python or Perl; () captures the -- current position after matching. pattern = "(.-)" .. pattern .. "()" local start = 1 while true do -- Did we reach the end of the string? if start > #str then table.insert(ret, "") return ret end -- match() returns all captures as multiple return values; -- we need to insert into a table to get them all. local captures = {mw.ustring.match(str, pattern, start)} -- If no match, add the remainder of the string. if #captures == 0 then table.insert(ret, mw.ustring.sub(str, start)) return ret end local newstart = table.remove(captures) -- Special case: If we don't advance by any characters, then advance -- by one character; this avoids an infinite loop, and makes splitting -- by an empty string work the way mw.ustring.split() does. If we -- reach the end of the string this way, return immediately, so we -- don't get a final empty string. if newstart == start then table.insert(ret, mw.ustring.sub(str, start, start)) table.remove(captures, 1) start = start + 1 if start > #str then return ret end else table.insert(ret, table.remove(captures, 1)) start = newstart end -- Insert any captures from the splitting pattern. for _, x in ipairs(captures) do table.insert(ret, x) end end end return export