Am 03.05.2014 18:37 schröbte Karel Tuma:
I know, I know, it is evil thing to do and I agree it is bad idea for
regular code. But hear me out:
local weak = setmetatable({}, {__mode="v"})
local resmt = {A}
function resmt.__gc(v)
print("resurrecting")
-- note that re-requesting finalizer is explicit like this
weak.x = setmetatable(v, resmt)
end
weak.x = setmetatable({}, resmt)
for i=1,10 do
collectgarbage()
end
assert(weak.x)
HTH, Philipp