From aaca9e5856d2f143ae2edf971108c2613ceca068 Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <4643818-rmlarsen1@users.noreply.gitlab.com>
Date: Thu, 26 Feb 2026 11:23:53 -0800
Subject: [PATCH] Add missing const qualifiers in Eigen/src/Core/

libeigen/eigen!2220

Co-authored-by: Rasmus Munk Larsen <rmlarsen@gmail.com>
---
 Eigen/src/Core/CoreIterators.h | 2 +-
 Eigen/src/Core/FindCoeff.h     | 8 ++++----
 Eigen/src/Core/Map.h           | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/Eigen/src/Core/CoreIterators.h b/Eigen/src/Core/CoreIterators.h
index f62cf238e..314372686 100644
--- a/Eigen/src/Core/CoreIterators.h
+++ b/Eigen/src/Core/CoreIterators.h
@@ -57,7 +57,7 @@ class InnerIterator {
     m_iter.operator+=(i);
     return *this;
   }
-  EIGEN_STRONG_INLINE InnerIterator operator+(Index i) {
+  EIGEN_STRONG_INLINE InnerIterator operator+(Index i) const {
     InnerIterator result(*this);
     result += i;
     return result;
diff --git a/Eigen/src/Core/FindCoeff.h b/Eigen/src/Core/FindCoeff.h
index 0102e8af3..1c07260ba 100644
--- a/Eigen/src/Core/FindCoeff.h
+++ b/Eigen/src/Core/FindCoeff.h
@@ -34,11 +34,11 @@ struct max_coeff_functor {
 
 template <typename Scalar>
 struct max_coeff_functor<Scalar, PropagateNaN, false> {
-  EIGEN_DEVICE_FUNC inline Scalar compareCoeff(const Scalar& incumbent, const Scalar& candidate) {
+  EIGEN_DEVICE_FUNC inline Scalar compareCoeff(const Scalar& incumbent, const Scalar& candidate) const {
     return (candidate > incumbent) || ((candidate != candidate) && (incumbent == incumbent));
   }
   template <typename Packet>
-  EIGEN_DEVICE_FUNC inline Packet comparePacket(const Packet& incumbent, const Packet& candidate) {
+  EIGEN_DEVICE_FUNC inline Packet comparePacket(const Packet& incumbent, const Packet& candidate) const {
     return pandnot(pcmp_lt_or_nan(incumbent, candidate), pisnan(incumbent));
   }
   template <typename Packet>
@@ -79,11 +79,11 @@ struct min_coeff_functor {
 
 template <typename Scalar>
 struct min_coeff_functor<Scalar, PropagateNaN, false> {
-  EIGEN_DEVICE_FUNC inline Scalar compareCoeff(const Scalar& incumbent, const Scalar& candidate) {
+  EIGEN_DEVICE_FUNC inline Scalar compareCoeff(const Scalar& incumbent, const Scalar& candidate) const {
     return (candidate < incumbent) || ((candidate != candidate) && (incumbent == incumbent));
   }
   template <typename Packet>
-  EIGEN_DEVICE_FUNC inline Packet comparePacket(const Packet& incumbent, const Packet& candidate) {
+  EIGEN_DEVICE_FUNC inline Packet comparePacket(const Packet& incumbent, const Packet& candidate) const {
     return pandnot(pcmp_lt_or_nan(candidate, incumbent), pisnan(incumbent));
   }
   template <typename Packet>
diff --git a/Eigen/src/Core/Map.h b/Eigen/src/Core/Map.h
index 52a8eca53..33b62c202 100644
--- a/Eigen/src/Core/Map.h
+++ b/Eigen/src/Core/Map.h
@@ -100,7 +100,7 @@ class Map : public MapBase<Map<PlainObjectType, MapOptions, StrideType> > {
 
   typedef typename Base::PointerType PointerType;
   typedef PointerType PointerArgType;
-  EIGEN_DEVICE_FUNC constexpr inline PointerType cast_to_pointer_type(PointerArgType ptr) { return ptr; }
+  EIGEN_DEVICE_FUNC constexpr inline PointerType cast_to_pointer_type(PointerArgType ptr) const { return ptr; }
 
   EIGEN_DEVICE_FUNC constexpr Index innerStride() const {
     return StrideType::InnerStrideAtCompileTime != 0 ? m_stride.inner() : 1;