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Selectively add constexpr to Core expression template scaffolding

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libeigen/eigen!2184

Closes #3041

Co-authored-by: Rasmus Munk Larsen <rmlarsen@gmail.com>
This commit is contained in:
Rasmus Munk Larsen
2026-02-24 19:59:10 -08:00
parent 34092d2788
commit 61895c5978
70 changed files with 986 additions and 841 deletions
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22
Eigen/src/Core/Diagonal.h
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@@ -71,14 +71,14 @@ class Diagonal : public internal::dense_xpr_base<Diagonal<MatrixType, DiagIndex_
typedef typename internal::dense_xpr_base<Diagonal>::type Base;
EIGEN_DENSE_PUBLIC_INTERFACE(Diagonal)
EIGEN_DEVICE_FUNC explicit inline Diagonal(MatrixType& matrix, Index a_index = DiagIndex)
EIGEN_DEVICE_FUNC constexpr explicit inline Diagonal(MatrixType& matrix, Index a_index = DiagIndex)
: m_matrix(matrix), m_index(a_index) {
eigen_assert(a_index <= m_matrix.cols() && -a_index <= m_matrix.rows());
}
EIGEN_INHERIT_ASSIGNMENT_OPERATORS(Diagonal)
EIGEN_DEVICE_FUNC inline Index rows() const {
EIGEN_DEVICE_FUNC constexpr inline Index rows() const {
return m_index.value() < 0 ? numext::mini<Index>(m_matrix.cols(), m_matrix.rows() + m_index.value())
: numext::mini<Index>(m_matrix.rows(), m_matrix.cols() - m_index.value());
}
@@ -124,11 +124,12 @@ class Diagonal : public internal::dense_xpr_base<Diagonal<MatrixType, DiagIndex_
return m_matrix.coeff(idx + rowOffset(), idx + colOffset());
}
EIGEN_DEVICE_FUNC inline const internal::remove_all_t<typename MatrixType::Nested>& nestedExpression() const {
EIGEN_DEVICE_FUNC constexpr inline const internal::remove_all_t<typename MatrixType::Nested>& nestedExpression()
const {
return m_matrix;
}
EIGEN_DEVICE_FUNC inline Index index() const { return m_index.value(); }
EIGEN_DEVICE_FUNC constexpr inline Index index() const { return m_index.value(); }
protected:
typename internal::ref_selector<MatrixType>::non_const_type m_matrix;
@@ -157,13 +158,13 @@ class Diagonal : public internal::dense_xpr_base<Diagonal<MatrixType, DiagIndex_
*
* \sa class Diagonal */
template <typename Derived>
EIGEN_DEVICE_FUNC inline typename MatrixBase<Derived>::DiagonalReturnType MatrixBase<Derived>::diagonal() {
EIGEN_DEVICE_FUNC constexpr typename MatrixBase<Derived>::DiagonalReturnType MatrixBase<Derived>::diagonal() {
return DiagonalReturnType(derived());
}
/** This is the const version of diagonal(). */
template <typename Derived>
EIGEN_DEVICE_FUNC inline const typename MatrixBase<Derived>::ConstDiagonalReturnType MatrixBase<Derived>::diagonal()
EIGEN_DEVICE_FUNC constexpr const typename MatrixBase<Derived>::ConstDiagonalReturnType MatrixBase<Derived>::diagonal()
const {
return ConstDiagonalReturnType(derived());
}
@@ -180,13 +181,14 @@ EIGEN_DEVICE_FUNC inline const typename MatrixBase<Derived>::ConstDiagonalReturn
*
* \sa MatrixBase::diagonal(), class Diagonal */
template <typename Derived>
EIGEN_DEVICE_FUNC inline Diagonal<Derived, DynamicIndex> MatrixBase<Derived>::diagonal(Index index) {
EIGEN_DEVICE_FUNC constexpr Diagonal<Derived, DynamicIndex> MatrixBase<Derived>::diagonal(Index index) {
return Diagonal<Derived, DynamicIndex>(derived(), index);
}
/** This is the const version of diagonal(Index). */
template <typename Derived>
EIGEN_DEVICE_FUNC inline const Diagonal<const Derived, DynamicIndex> MatrixBase<Derived>::diagonal(Index index) const {
EIGEN_DEVICE_FUNC constexpr const Diagonal<const Derived, DynamicIndex> MatrixBase<Derived>::diagonal(
Index index) const {
return Diagonal<const Derived, DynamicIndex>(derived(), index);
}
@@ -203,14 +205,14 @@ EIGEN_DEVICE_FUNC inline const Diagonal<const Derived, DynamicIndex> MatrixBase<
* \sa MatrixBase::diagonal(), class Diagonal */
template <typename Derived>
template <int Index_>
EIGEN_DEVICE_FUNC inline Diagonal<Derived, Index_> MatrixBase<Derived>::diagonal() {
EIGEN_DEVICE_FUNC constexpr Diagonal<Derived, Index_> MatrixBase<Derived>::diagonal() {
return Diagonal<Derived, Index_>(derived());
}
/** This is the const version of diagonal<int>(). */
template <typename Derived>
template <int Index_>
EIGEN_DEVICE_FUNC inline const Diagonal<const Derived, Index_> MatrixBase<Derived>::diagonal() const {
EIGEN_DEVICE_FUNC constexpr const Diagonal<const Derived, Index_> MatrixBase<Derived>::diagonal() const {
return Diagonal<const Derived, Index_>(derived());
}