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PiperOrigin-RevId: 813192026
Change-Id: I6205d1bf30a2d04d5d21043120d0d3c4348025d6

Eigen/src/SparseCore/SparseCompressedBase.h

diff --git a/Eigen/src/SparseCore/SparseCompressedBase.h b/Eigen/src/SparseCore/SparseCompressedBase.h
index c168283..05c49e5 100644
--- a/Eigen/src/SparseCore/SparseCompressedBase.h
+++ b/Eigen/src/SparseCore/SparseCompressedBase.h
@@ -455,7 +455,6 @@
     m_data = other.m_data;
     return *this;
   }
-
   inline CompressedStorageIterator operator+(difference_type offset) const {
     return CompressedStorageIterator(m_index + offset, m_data);
   }
@@ -480,7 +479,9 @@
     return *this;
   }
   inline reference operator*() const { return reference(m_data.keyPtr() + m_index, m_data.valuePtr() + m_index); }
-
+  inline reference operator[](int index) {
+    return *(*this + index);
+  }
 #define MAKE_COMP(OP) \
   inline bool operator OP(const CompressedStorageIterator& other) const { return m_index OP other.m_index; }
   MAKE_COMP(<)