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Fix partitions(0), closes #143 #192

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Fix partitions(0), closes #143 #192

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6 changes: 5 additions & 1 deletion src/partitions.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,11 @@ end
Base.length(p::IntegerPartitions) = npartitions(p.n)
Base.eltype(p::IntegerPartitions) = Vector{Int}

function Base.iterate(p::IntegerPartitions, xs = Int[])
function Base.iterate(p::IntegerPartitions, xs = nothing)
if xs === nothing
p.n == 0 && return Int[], Int[]
xs = Int[]
end
length(xs) == p.n && return
xs = nextpartition(p.n,xs)
(xs, xs)
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2 changes: 1 addition & 1 deletion test/partitions.jl
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
@testset "partitions" begin

@testset "partitions(n::Integer)" begin
@test_broken collect(partitions(0)) == [[]]
@test collect(partitions(0)) == [[]]
@test collect(partitions(1)) == [[1]]
@test collect(partitions(2)) == [[2], [1, 1]]
@test collect(partitions(3)) == [[3], [2, 1], [1, 1, 1]]
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