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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