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Replace Nsymbol calls or add guards in fusion tree iteration #515

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Replace Nsymbol calls or add guards in fusion tree iteration #515

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5 changes: 3 additions & 2 deletions src/fusiontrees/iterator.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,7 @@ _fusiondim(iters::NTuple{1}, c::I) where {I <: Sector} = Int(c ∈ iters[1])
function _fusiondim(iters::NTuple{2}, c::I) where {I <: Sector}
d = 0
for a in iters[1], b in iters[2]
c ∈ a ⊗ b || continue
d += Int(Nsymbol(a, b, c))
end
return d
Expand Down Expand Up @@ -104,7 +105,7 @@ function _fusiontree_iterate(uncoupledsectors::NTuple{2}, c::I) where {I <: Sect
nextout1 = iterate(outiter1)
nextout1 === nothing && return nothing
a, outstate1 = nextout1
while Nsymbol(a, b, c) == 0
while c ∉ a ⊗ b
nextout1 = iterate(outiter1, outstate1)
if isnothing(nextout1)
nextout2 = iterate(outiter2, outstate2)
Expand Down Expand Up @@ -133,7 +134,7 @@ function _fusiontree_iterate(uncoupledsectors::NTuple{2}, c::I, out, lines, vert
nextout1 = iterate(outiter1)
end
a, outstate1 = nextout1
while Nsymbol(a, b, c) == 0
while c ∉ a ⊗ b
nextout1 = iterate(outiter1, outstate1)
if isnothing(nextout1)
nextout2 = iterate(outiter2, outstate2)
Expand Down
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