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-- reads luac listings and reports global variable usage
-- lines where a global is written to are marked with "*"
-- typical usage: luac -p -l file.lua | lua globals.lua | sort | lua table.lua
while 1 do
local s=io.read()
if s==nil then break end
local ok,_,l,op,g=string.find(s,"%[%-?(%d*)%]%s*([GS])ETGLOBAL.-;%s+(.*)$")
if ok then
if op=="S" then op="*" else op="" end
io.write(g,"\t",l,op,"\n")
end
end