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Add support for C++23 multidimensional subscript operator

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I'm not sure where to put tests for this, assuming they're needed. They also wouldn't run in CI anyway since CI only exercises the C++17 codepaths.

See merge request libeigen/eigen!2053
This commit is contained in:
Tyler Veness
2025-11-04 07:03:04 +00:00
committed by Rasmus Munk Larsen
parent b6fcddccfc
commit f95b4698fc
6 changed files with 47 additions and 1 deletions
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9
Eigen/src/Geometry/Transform.h
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@@ -365,6 +365,15 @@ class Transform {
* \sa MatrixBase::operator(Index,Index) */
EIGEN_DEVICE_FUNC inline Scalar& operator()(Index row, Index col) { return m_matrix(row, col); }
#if __cpp_multidimensional_subscript >= 202110L
/** shortcut for m_matrix(row,col);
* \sa MatrixBase::operator(Index,Index) const */
EIGEN_DEVICE_FUNC inline Scalar operator[](Index row, Index col) const { return m_matrix[row, col]; }
/** shortcut for m_matrix(row,col);
* \sa MatrixBase::operator(Index,Index) */
EIGEN_DEVICE_FUNC inline Scalar& operator[](Index row, Index col) { return m_matrix[row, col]; }
#endif
/** \returns a read-only expression of the transformation matrix */
EIGEN_DEVICE_FUNC inline const MatrixType& matrix() const { return m_matrix; }
/** \returns a writable expression of the transformation matrix */