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local verboselvl = 0
local mk_out = function (stream, threshold, newlinep)
local out = io.stdout
if stream == "err" or stream == "stderr" then out = io.stderr end
return function (...)
if verboselvl >= threshold then
local ok, msg = pcall (stringformat, ...)
if ok then
out:write (msg)
if newlinep == true then out:write "\n" end
---else silently ignore
end
end
end
end
local set_verbosity = function (n) verboselvl = n end
return
{ println = mk_out ("stdout", 0, true)
, errorln = mk_out ("stderr", 0, true)
, noiseln = mk_out ("stderr", 1, true)
, debugln = mk_out ("stderr", 2, true)
, set_verbosity = set_verbosity
}
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