Function swap

include/Eigen/src/SparseCore/SparseVector.h:277–280

Swaps the values of \c *this and \a other. * Overloaded for performance: this version performs a \em shallow swap by swapping pointers and attributes only. * \sa SparseMatrixBase::swap() */

   * \sa SparseMatrixBase::swap()
   */
  inline void swap(SparseVector& other) {
    std::swap(m_size, other.m_size);
    m_data.swap(other.m_data);
  }
  friend EIGEN_DEVICE_FUNC void swap(SparseVector& a, SparseVector& b) { a.swap(b); }

  template <int OtherOptions>