Skip to content

fix: fix comparison involving NaN #178

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Aug 14, 2025
Merged

fix: fix comparison involving NaN #178

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
4cddccd
fix: fix comparison involving `NaN`
AayushSabharwal Aug 8, 2025
2b9ca2b
test: add allocation tests to NaN equality checking
AayushSabharwal Aug 9, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 6 additions & 3 deletions src/comp.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -58,25 +58,28 @@ end
(==)(x::MonomialVector, mv::AbstractVector) = x == monomial_vector(mv)

# Comparison of Term
function (==)(p::Polynomial{V,M}, q::Polynomial{V,M}) where {V,M}
function _compare(p::Polynomial{V,M}, q::Polynomial{V,M}, comparator) where {V,M}
# terms should be sorted and without zeros
if MP.nterms(p) != MP.nterms(q)
return false
end
for i in eachindex(p.a)
if p.x[i] != q.x[i]
if !comparator(p.x[i], q.x[i])
# There should not be zero terms
@assert p.a[i] != 0
@assert q.a[i] != 0
return false
end
if p.a[i] != q.a[i]
if !comparator(p.a[i], q.a[i])
return false
end
end
return true
end

(==)(p::Polynomial{V, M}, q::Polynomial{V, M}) where {V, M} = _compare(p, q, (==))
Base.isequal(p::Polynomial{V, M}, q::Polynomial{V, M}) where {V, M} = _compare(p, q, isequal)

function Base.isapprox(
p::Polynomial{V,M,S},
q::Polynomial{V,M,T};
Expand Down
14 changes: 14 additions & 0 deletions test/comp.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -97,3 +97,17 @@ end
_test_monomials([x, y], 1:2, [y, x, y^2, x * y, x^2])
_test_monomials([x, y], [0, 1, 3], [1, y, x, y^3, x*y^2, x^2*y, x^3])
end

@testset "Comparison with NaN" begin
@polyvar p
poly1 = NaN + p
poly2 = NaN + p
@test poly1 != poly2
@test (@allocated poly1 != poly2) == 0
@test poly1 != poly1
@test (@allocated poly1 != poly1) == 0
@test isequal(poly1, poly2)
@test (@allocated isequal(poly1, poly2)) == 0
@test isequal(poly1, poly1)
@test (@allocated isequal(poly1, poly1)) == 0
end
Loading