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Add hash for SparsePoly #1691

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Add hash for SparsePoly #1691

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8 changes: 8 additions & 0 deletions src/generic/SparsePoly.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,14 @@
#
###############################################################################

function Base.hash(a::SparsePoly, h::UInt)
b = 0x679c879b67bb8385%UInt
for i in 1:length(a)
b = xor(b, hash(a.exps[i], hash(a.coeffs[i], h)))
end
return b

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src/generic/SparsePoly.jl#L37-L42 

Added lines #L37 - L42 were not covered by tests
end

function coeff(x::SparsePoly, i::Int)
i < 0 && throw(DomainError(i, "cannot get the i-th coefficient with i < 0"))
return x.coeffs[i + 1]
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