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local utils = {}
function utils.setupvalue(func, name, newvalue, quiet)
local uidx = 0
repeat
uidx = uidx + 1
local uname, value = debug.getupvalue(func, uidx)
if uname == name then
debug.setupvalue(func, uidx, newvalue)
return value -- previous one
end
until uname == nil
if not quiet then
error(string.format('unknown upvalue <%s>', name))
end
end
function utils.getupvalue(func, name, quiet)
local uidx = 0
repeat
uidx = uidx + 1
local uname, value = debug.getupvalue(func, uidx)
if uname == name then
return value
end
until uname == nil
if not quiet then
error(string.format('unknown upvalue <%s>', name))
end
end
function utils.duptable(tbl)
local dup = {}
for k,v in pairs(tbl) do
dup[k] = v
end
return dup
end
return utils
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