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make nzpairs(::ConstraintMatrix) type stable

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This commit is contained in:
Marek Kaluba 2023-04-04 23:15:40 +02:00
parent 132802feeb
commit 3f2be20152
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1 changed files with 11 additions and 8 deletions
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19
src/constraint_matrix.jl
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@ -83,26 +83,29 @@ Base.@propagate_inbounds function Base.getindex(
return pos - neg
end
struct NZPairsIter{T}
m::ConstraintMatrix{T}
struct NZPairsIter{T,I}
m::ConstraintMatrix{T,I}
end
Base.eltype(::Type{NZPairsIter{T}}) where {T} = Pair{Int,T}
Base.IteratorSize(::Type{<:NZPairsIter}) = Base.SizeUnknown()
# TODO: iterate over (idx=>val) pairs combining vals
function Base.iterate(itr::NZPairsIter, state::Tuple{Int,Int} = (1, 1))
function Base.iterate(
itr::NZPairsIter,
state::Tuple{Int,Nothing} = (1, nothing),
)
k = iterate(itr.m.pos, state[1])
isnothing(k) && return iterate(itr, state[2])
isnothing(k) && return iterate(itr, (nothing, 1))
idx, st = k
return idx => itr.m.val, (st, 1)
return idx => itr.m.val, (st, nothing)
end
function Base.iterate(itr::NZPairsIter, state::Int)
k = iterate(itr.m.neg, state[1])
function Base.iterate(itr::NZPairsIter, state::Tuple{Nothing,Int})
k = iterate(itr.m.neg, state[2])
isnothing(k) && return nothing
idx, st = k
return idx => -itr.m.val, st
return idx => -itr.m.val, (nothing, st)
end
"""