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omus/gist:21d00be0977d295d6edd94c8c908c308

Created September 20, 2017 20:48
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gistfile1.txt
Ts = sort!(Base.uniontypes(Base.BitInteger), by=T->(!(T<:Signed),sizeof(T)));
for (i, T) in enumerate(Ts), (j, S) in enumerate(Ts)
i < j || continue
(T <: Signed) ⊻ (S <: Signed) || continue
P = promote_type(T, S)
@printf "%-7s + %-7s => %-7s\n" T S P
end
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