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much better workaround for empty struct (the previous one caused GCC 4.3 to generate wrong code leading to segfaults)

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This commit is contained in:
Gael Guennebaud 2009-12-18 17:08:59 +01:00
parent 945cbc3bc6
commit 9d54783036
5 changed files with 53 additions and 34 deletions
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12
Eigen/src/Array/Functors.h
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@ -56,7 +56,8 @@ struct ei_functor_traits<ei_scalar_add_op<Scalar> >
* *
* \sa class CwiseUnaryOp, Cwise::sqrt() * \sa class CwiseUnaryOp, Cwise::sqrt()
*/ */
template<typename Scalar> struct ei_scalar_sqrt_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_sqrt_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_sqrt_op)
inline const Scalar operator() (const Scalar& a) const { return ei_sqrt(a); } inline const Scalar operator() (const Scalar& a) const { return ei_sqrt(a); }
typedef typename ei_packet_traits<Scalar>::type Packet; typedef typename ei_packet_traits<Scalar>::type Packet;
inline Packet packetOp(const Packet& a) const { return ei_psqrt(a); } inline Packet packetOp(const Packet& a) const { return ei_psqrt(a); }
@ -77,7 +78,8 @@ struct ei_functor_traits<ei_scalar_sqrt_op<Scalar> >
* *
* \sa class CwiseUnaryOp, Cwise::cos() * \sa class CwiseUnaryOp, Cwise::cos()
*/ */
template<typename Scalar> struct ei_scalar_cos_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_cos_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_cos_op)
inline Scalar operator() (const Scalar& a) const { return ei_cos(a); } inline Scalar operator() (const Scalar& a) const { return ei_cos(a); }
typedef typename ei_packet_traits<Scalar>::type Packet; typedef typename ei_packet_traits<Scalar>::type Packet;
inline Packet packetOp(const Packet& a) const { return ei_pcos(a); } inline Packet packetOp(const Packet& a) const { return ei_pcos(a); }
@ -99,7 +101,8 @@ struct ei_functor_traits<ei_scalar_cos_op<Scalar> >
* *
* \sa class CwiseUnaryOp, Cwise::sin() * \sa class CwiseUnaryOp, Cwise::sin()
*/ */
template<typename Scalar> struct ei_scalar_sin_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_sin_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_sin_op)
inline const Scalar operator() (const Scalar& a) const { return ei_sin(a); } inline const Scalar operator() (const Scalar& a) const { return ei_sin(a); }
typedef typename ei_packet_traits<Scalar>::type Packet; typedef typename ei_packet_traits<Scalar>::type Packet;
inline Packet packetOp(const Packet& a) const { return ei_psin(a); } inline Packet packetOp(const Packet& a) const { return ei_psin(a); }
@ -143,6 +146,7 @@ struct ei_functor_traits<ei_scalar_pow_op<Scalar> >
*/ */
template<typename Scalar> template<typename Scalar>
struct ei_scalar_inverse_op { struct ei_scalar_inverse_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_inverse_op)
inline Scalar operator() (const Scalar& a) const { return Scalar(1)/a; } inline Scalar operator() (const Scalar& a) const { return Scalar(1)/a; }
template<typename PacketScalar> template<typename PacketScalar>
inline const PacketScalar packetOp(const PacketScalar& a) const inline const PacketScalar packetOp(const PacketScalar& a) const
@ -162,6 +166,7 @@ struct ei_functor_traits<ei_scalar_inverse_op<Scalar> >
*/ */
template<typename Scalar> template<typename Scalar>
struct ei_scalar_square_op { struct ei_scalar_square_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_square_op)
inline Scalar operator() (const Scalar& a) const { return a*a; } inline Scalar operator() (const Scalar& a) const { return a*a; }
template<typename PacketScalar> template<typename PacketScalar>
inline const PacketScalar packetOp(const PacketScalar& a) const inline const PacketScalar packetOp(const PacketScalar& a) const
@ -181,6 +186,7 @@ struct ei_functor_traits<ei_scalar_square_op<Scalar> >
*/ */
template<typename Scalar> template<typename Scalar>
struct ei_scalar_cube_op { struct ei_scalar_cube_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_cube_op)
inline Scalar operator() (const Scalar& a) const { return a*a*a; } inline Scalar operator() (const Scalar& a) const { return a*a*a; }
template<typename PacketScalar> template<typename PacketScalar>
inline const PacketScalar packetOp(const PacketScalar& a) const inline const PacketScalar packetOp(const PacketScalar& a) const

4
Eigen/src/Array/Random.h
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@ -25,8 +25,8 @@
#ifndef EIGEN_RANDOM_H #ifndef EIGEN_RANDOM_H
#define EIGEN_RANDOM_H #define EIGEN_RANDOM_H
template<typename Scalar> struct ei_scalar_random_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_random_op {
inline ei_scalar_random_op(void) {} EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_random_op)
inline const Scalar operator() (int, int) const { return ei_random<Scalar>(); } inline const Scalar operator() (int, int) const { return ei_random<Scalar>(); }
}; };
template<typename Scalar> template<typename Scalar>

3
Eigen/src/Array/VectorwiseOp.h
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@ -110,7 +110,8 @@ class PartialReduxExpr : ei_no_assignment_operator,
#define EIGEN_MEMBER_FUNCTOR(MEMBER,COST) \ #define EIGEN_MEMBER_FUNCTOR(MEMBER,COST) \
template <typename ResultType> \ template <typename ResultType> \
struct ei_member_##MEMBER EIGEN_EMPTY_STRUCT { \ struct ei_member_##MEMBER { \
EIGEN_EMPTY_STRUCT_CTOR(ei_member_##MEMBER) \
typedef ResultType result_type; \ typedef ResultType result_type; \
template<typename Scalar, int Size> struct Cost \ template<typename Scalar, int Size> struct Cost \
{ enum { value = COST }; }; \ { enum { value = COST }; }; \

51
Eigen/src/Core/Functors.h
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@ -32,7 +32,8 @@
* *
* \sa class CwiseBinaryOp, MatrixBase::operator+, class VectorwiseOp, MatrixBase::sum() * \sa class CwiseBinaryOp, MatrixBase::operator+, class VectorwiseOp, MatrixBase::sum()
*/ */
template<typename Scalar> struct ei_scalar_sum_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_sum_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_sum_op)
EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return a + b; } EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return a + b; }
template<typename PacketScalar> template<typename PacketScalar>
EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const
@ -54,7 +55,8 @@ struct ei_functor_traits<ei_scalar_sum_op<Scalar> > {
* *
* \sa class CwiseBinaryOp, Cwise::operator*(), class VectorwiseOp, MatrixBase::redux() * \sa class CwiseBinaryOp, Cwise::operator*(), class VectorwiseOp, MatrixBase::redux()
*/ */
template<typename Scalar> struct ei_scalar_product_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_product_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_product_op)
EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return a * b; } EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return a * b; }
template<typename PacketScalar> template<typename PacketScalar>
EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const
@ -76,7 +78,8 @@ struct ei_functor_traits<ei_scalar_product_op<Scalar> > {
* *
* \sa class CwiseBinaryOp, MatrixBase::cwiseMin, class VectorwiseOp, MatrixBase::minCoeff() * \sa class CwiseBinaryOp, MatrixBase::cwiseMin, class VectorwiseOp, MatrixBase::minCoeff()
*/ */
template<typename Scalar> struct ei_scalar_min_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_min_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_min_op)
EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return std::min(a, b); } EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return std::min(a, b); }
template<typename PacketScalar> template<typename PacketScalar>
EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const
@ -98,7 +101,8 @@ struct ei_functor_traits<ei_scalar_min_op<Scalar> > {
* *
* \sa class CwiseBinaryOp, MatrixBase::cwiseMax, class VectorwiseOp, MatrixBase::maxCoeff() * \sa class CwiseBinaryOp, MatrixBase::cwiseMax, class VectorwiseOp, MatrixBase::maxCoeff()
*/ */
template<typename Scalar> struct ei_scalar_max_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_max_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_max_op)
EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return std::max(a, b); } EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return std::max(a, b); }
template<typename PacketScalar> template<typename PacketScalar>
EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const
@ -120,7 +124,8 @@ struct ei_functor_traits<ei_scalar_max_op<Scalar> > {
* *
* \sa MatrixBase::stableNorm(), class Redux * \sa MatrixBase::stableNorm(), class Redux
*/ */
template<typename Scalar> struct ei_scalar_hypot_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_hypot_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_hypot_op)
// typedef typename NumTraits<Scalar>::Real result_type; // typedef typename NumTraits<Scalar>::Real result_type;
EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& _x, const Scalar& _y) const EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& _x, const Scalar& _y) const
{ {
@ -142,7 +147,8 @@ struct ei_functor_traits<ei_scalar_hypot_op<Scalar> > {
* *
* \sa class CwiseBinaryOp, MatrixBase::operator- * \sa class CwiseBinaryOp, MatrixBase::operator-
*/ */
template<typename Scalar> struct ei_scalar_difference_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_difference_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_difference_op)
EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return a - b; } EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return a - b; }
template<typename PacketScalar> template<typename PacketScalar>
EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const
@ -161,7 +167,8 @@ struct ei_functor_traits<ei_scalar_difference_op<Scalar> > {
* *
* \sa class CwiseBinaryOp, Cwise::operator/() * \sa class CwiseBinaryOp, Cwise::operator/()
*/ */
template<typename Scalar> struct ei_scalar_quotient_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_quotient_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_quotient_op)
EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return a / b; } EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a, const Scalar& b) const { return a / b; }
template<typename PacketScalar> template<typename PacketScalar>
EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a, const PacketScalar& b) const
@ -185,7 +192,8 @@ struct ei_functor_traits<ei_scalar_quotient_op<Scalar> > {
* *
* \sa class CwiseUnaryOp, MatrixBase::operator- * \sa class CwiseUnaryOp, MatrixBase::operator-
*/ */
template<typename Scalar> struct ei_scalar_opposite_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_opposite_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_opposite_op)
EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a) const { return -a; } EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a) const { return -a; }
template<typename PacketScalar> template<typename PacketScalar>
EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a) const EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a) const
@ -203,7 +211,8 @@ struct ei_functor_traits<ei_scalar_opposite_op<Scalar> >
* *
* \sa class CwiseUnaryOp, Cwise::abs * \sa class CwiseUnaryOp, Cwise::abs
*/ */
template<typename Scalar> struct ei_scalar_abs_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_abs_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_abs_op)
typedef typename NumTraits<Scalar>::Real result_type; typedef typename NumTraits<Scalar>::Real result_type;
EIGEN_STRONG_INLINE const result_type operator() (const Scalar& a) const { return ei_abs(a); } EIGEN_STRONG_INLINE const result_type operator() (const Scalar& a) const { return ei_abs(a); }
template<typename PacketScalar> template<typename PacketScalar>
@ -224,7 +233,8 @@ struct ei_functor_traits<ei_scalar_abs_op<Scalar> >
* *
* \sa class CwiseUnaryOp, Cwise::abs2 * \sa class CwiseUnaryOp, Cwise::abs2
*/ */
template<typename Scalar> struct ei_scalar_abs2_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_abs2_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_abs2_op)
typedef typename NumTraits<Scalar>::Real result_type; typedef typename NumTraits<Scalar>::Real result_type;
EIGEN_STRONG_INLINE const result_type operator() (const Scalar& a) const { return ei_abs2(a); } EIGEN_STRONG_INLINE const result_type operator() (const Scalar& a) const { return ei_abs2(a); }
template<typename PacketScalar> template<typename PacketScalar>
@ -240,7 +250,8 @@ struct ei_functor_traits<ei_scalar_abs2_op<Scalar> >
* *
* \sa class CwiseUnaryOp, MatrixBase::conjugate() * \sa class CwiseUnaryOp, MatrixBase::conjugate()
*/ */
template<typename Scalar> struct ei_scalar_conjugate_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_conjugate_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_conjugate_op)
EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a) const { return ei_conj(a); } EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a) const { return ei_conj(a); }
template<typename PacketScalar> template<typename PacketScalar>
EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a) const { return a; } EIGEN_STRONG_INLINE const PacketScalar packetOp(const PacketScalar& a) const { return a; }
@ -260,7 +271,8 @@ struct ei_functor_traits<ei_scalar_conjugate_op<Scalar> >
* \sa class CwiseUnaryOp, MatrixBase::cast() * \sa class CwiseUnaryOp, MatrixBase::cast()
*/ */
template<typename Scalar, typename NewType> template<typename Scalar, typename NewType>
struct ei_scalar_cast_op EIGEN_EMPTY_STRUCT { struct ei_scalar_cast_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_cast_op)
typedef NewType result_type; typedef NewType result_type;
EIGEN_STRONG_INLINE const NewType operator() (const Scalar& a) const { return static_cast<NewType>(a); } EIGEN_STRONG_INLINE const NewType operator() (const Scalar& a) const { return static_cast<NewType>(a); }
}; };
@ -274,7 +286,8 @@ struct ei_functor_traits<ei_scalar_cast_op<Scalar,NewType> >
* \sa class CwiseUnaryOp, MatrixBase::real() * \sa class CwiseUnaryOp, MatrixBase::real()
*/ */
template<typename Scalar> template<typename Scalar>
struct ei_scalar_real_op EIGEN_EMPTY_STRUCT { struct ei_scalar_real_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_real_op)
typedef typename NumTraits<Scalar>::Real result_type; typedef typename NumTraits<Scalar>::Real result_type;
EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return ei_real(a); } EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return ei_real(a); }
EIGEN_STRONG_INLINE result_type& operator() (Scalar& a) const { return ei_real_ref(a); } EIGEN_STRONG_INLINE result_type& operator() (Scalar& a) const { return ei_real_ref(a); }
@ -289,7 +302,8 @@ struct ei_functor_traits<ei_scalar_real_op<Scalar> >
* \sa class CwiseUnaryOp, MatrixBase::imag() * \sa class CwiseUnaryOp, MatrixBase::imag()
*/ */
template<typename Scalar> template<typename Scalar>
struct ei_scalar_imag_op EIGEN_EMPTY_STRUCT { struct ei_scalar_imag_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_imag_op)
typedef typename NumTraits<Scalar>::Real result_type; typedef typename NumTraits<Scalar>::Real result_type;
EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return ei_imag(a); } EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return ei_imag(a); }
EIGEN_STRONG_INLINE result_type& operator() (Scalar& a) const { return ei_imag_ref(a); } EIGEN_STRONG_INLINE result_type& operator() (Scalar& a) const { return ei_imag_ref(a); }
@ -304,7 +318,8 @@ struct ei_functor_traits<ei_scalar_imag_op<Scalar> >
* *
* \sa class CwiseUnaryOp, Cwise::exp() * \sa class CwiseUnaryOp, Cwise::exp()
*/ */
template<typename Scalar> struct ei_scalar_exp_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_exp_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_exp_op)
inline const Scalar operator() (const Scalar& a) const { return ei_exp(a); } inline const Scalar operator() (const Scalar& a) const { return ei_exp(a); }
typedef typename ei_packet_traits<Scalar>::type Packet; typedef typename ei_packet_traits<Scalar>::type Packet;
inline Packet packetOp(const Packet& a) const { return ei_pexp(a); } inline Packet packetOp(const Packet& a) const { return ei_pexp(a); }
@ -319,7 +334,8 @@ struct ei_functor_traits<ei_scalar_exp_op<Scalar> >
* *
* \sa class CwiseUnaryOp, Cwise::log() * \sa class CwiseUnaryOp, Cwise::log()
*/ */
template<typename Scalar> struct ei_scalar_log_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_log_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_log_op)
inline const Scalar operator() (const Scalar& a) const { return ei_log(a); } inline const Scalar operator() (const Scalar& a) const { return ei_log(a); }
typedef typename ei_packet_traits<Scalar>::type Packet; typedef typename ei_packet_traits<Scalar>::type Packet;
inline Packet packetOp(const Packet& a) const { return ei_plog(a); } inline Packet packetOp(const Packet& a) const { return ei_plog(a); }
@ -428,7 +444,8 @@ template<typename Scalar>
struct ei_functor_traits<ei_scalar_constant_op<Scalar> > struct ei_functor_traits<ei_scalar_constant_op<Scalar> >
{ enum { Cost = 1, PacketAccess = ei_packet_traits<Scalar>::size>1, IsRepeatable = true }; }; { enum { Cost = 1, PacketAccess = ei_packet_traits<Scalar>::size>1, IsRepeatable = true }; };
template<typename Scalar> struct ei_scalar_identity_op EIGEN_EMPTY_STRUCT { template<typename Scalar> struct ei_scalar_identity_op {
EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_identity_op)
EIGEN_STRONG_INLINE ei_scalar_identity_op(void) {} EIGEN_STRONG_INLINE ei_scalar_identity_op(void) {}
EIGEN_STRONG_INLINE const Scalar operator() (int row, int col) const { return row==col ? Scalar(1) : Scalar(0); } EIGEN_STRONG_INLINE const Scalar operator() (int row, int col) const { return row==col ? Scalar(1) : Scalar(0); }
}; };

17
Eigen/src/Core/util/XprHelper.h
View File

@ -28,16 +28,11 @@
// just a workaround because GCC seems to not really like empty structs // just a workaround because GCC seems to not really like empty structs
#ifdef __GNUG__ #ifdef __GNUG__
struct ei_empty_struct #define EIGEN_EMPTY_STRUCT_CTOR(X) \
{ EIGEN_STRONG_INLINE X() {} \
EIGEN_ALWAYS_INLINE_ATTRIB ei_empty_struct() {} EIGEN_STRONG_INLINE X(const X&) {}
EIGEN_ALWAYS_INLINE_ATTRIB ei_empty_struct(const ei_empty_struct&) {}
EIGEN_ALWAYS_INLINE_ATTRIB ei_empty_struct& operator=(const ei_empty_struct&) { return *this; }
char _ei_dummy_;
};
#define EIGEN_EMPTY_STRUCT : Eigen::ei_empty_struct
#else #else
#define EIGEN_EMPTY_STRUCT #define EIGEN_EMPTY_STRUCT_CTOR(X)
#endif #endif
//classes inheriting ei_no_assignment_operator don't generate a default operator=. //classes inheriting ei_no_assignment_operator don't generate a default operator=.
@ -51,10 +46,10 @@ class ei_no_assignment_operator
* can be accessed using value() and setValue(). * can be accessed using value() and setValue().
* Otherwise, this class is an empty structure and value() just returns the template parameter Value. * Otherwise, this class is an empty structure and value() just returns the template parameter Value.
*/ */
template<int Value> class ei_int_if_dynamic EIGEN_EMPTY_STRUCT template<int Value> class ei_int_if_dynamic
{ {
public: public:
ei_int_if_dynamic() {} EIGEN_EMPTY_STRUCT_CTOR(ei_int_if_dynamic)
explicit ei_int_if_dynamic(int) {} explicit ei_int_if_dynamic(int) {}
static int value() { return Value; } static int value() { return Value; }
void setValue(int) {} void setValue(int) {}