contrib/libs/lua/common/stdlib.lua


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function range(i, j)
   local function rangeGenerator()
      while i < j do
         coroutine.yield(i)
         i = i + 1
      end
   end

   return coroutine.wrap(rangeGenerator)
end

-- cross-platform file rename
function rename(src, dest)
    os.remove(dest)
    return os.rename(src, dest)
end