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bug #86 : use internal:: namespace instead of ei_ prefix

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This commit is contained in:
Benoit Jacob
2010-10-25 10:15:22 -04:00
parent ca85a1f6c5
commit 4716040703
330 changed files with 7615 additions and 7032 deletions
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248
Eigen/src/Core/util/XprHelper.h
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@@ -1,4 +1,4 @@
// // This file is part of Eigen, a lightweight C++ template library
// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
@@ -37,46 +37,48 @@
#define EIGEN_EMPTY_STRUCT_CTOR(X)
#endif
//classes inheriting ei_no_assignment_operator don't generate a default operator=.
class ei_no_assignment_operator
typedef EIGEN_DEFAULT_DENSE_INDEX_TYPE DenseIndex;
namespace internal {
//classes inheriting no_assignment_operator don't generate a default operator=.
class no_assignment_operator
{
private:
ei_no_assignment_operator& operator=(const ei_no_assignment_operator&);
no_assignment_operator& operator=(const no_assignment_operator&);
};
typedef EIGEN_DEFAULT_DENSE_INDEX_TYPE DenseIndex;
/** \internal return the index type with the largest number of bits */
template<typename I1, typename I2>
struct ei_promote_index_type
struct promote_index_type
{
typedef typename ei_meta_if<(sizeof(I1)<sizeof(I2)), I2, I1>::ret type;
typedef typename meta_if<(sizeof(I1)<sizeof(I2)), I2, I1>::ret type;
};
/** \internal If the template parameter Value is Dynamic, this class is just a wrapper around a T variable that
* can be accessed using value() and setValue().
* Otherwise, this class is an empty structure and value() just returns the template parameter Value.
*/
template<typename T, int Value> class ei_variable_if_dynamic
template<typename T, int Value> class variable_if_dynamic
{
public:
EIGEN_EMPTY_STRUCT_CTOR(ei_variable_if_dynamic)
explicit ei_variable_if_dynamic(T v) { EIGEN_ONLY_USED_FOR_DEBUG(v); ei_assert(v == T(Value)); }
EIGEN_EMPTY_STRUCT_CTOR(variable_if_dynamic)
explicit variable_if_dynamic(T v) { EIGEN_ONLY_USED_FOR_DEBUG(v); assert(v == T(Value)); }
static T value() { return T(Value); }
void setValue(T) {}
};
template<typename T> class ei_variable_if_dynamic<T, Dynamic>
template<typename T> class variable_if_dynamic<T, Dynamic>
{
T m_value;
ei_variable_if_dynamic() { ei_assert(false); }
variable_if_dynamic() { assert(false); }
public:
explicit ei_variable_if_dynamic(T value) : m_value(value) {}
explicit variable_if_dynamic(T value) : m_value(value) {}
T value() const { return m_value; }
void setValue(T value) { m_value = value; }
};
template<typename T> struct ei_functor_traits
template<typename T> struct functor_traits
{
enum
{
@@ -85,9 +87,9 @@ template<typename T> struct ei_functor_traits
};
};
template<typename T> struct ei_packet_traits;
template<typename T> struct packet_traits;
template<typename T> struct ei_unpacket_traits
template<typename T> struct unpacket_traits
{
typedef T type;
enum {size=1};
@@ -100,7 +102,7 @@ template<typename _Scalar, int _Rows, int _Cols,
: EIGEN_DEFAULT_MATRIX_STORAGE_ORDER_OPTION ),
int _MaxRows = _Rows,
int _MaxCols = _Cols
> class ei_make_proper_matrix_type
> class make_proper_matrix_type
{
enum {
IsColVector = _Cols==1 && _Rows!=1,
@@ -114,7 +116,7 @@ template<typename _Scalar, int _Rows, int _Cols,
};
template<typename Scalar, int Rows, int Cols, int Options, int MaxRows, int MaxCols>
class ei_compute_matrix_flags
class compute_matrix_flags
{
enum {
row_major_bit = Options&RowMajor ? RowMajorBit : 0,
@@ -123,10 +125,10 @@ class ei_compute_matrix_flags
aligned_bit =
(
((Options&DontAlign)==0)
&& ei_packet_traits<Scalar>::Vectorizable
&& packet_traits<Scalar>::Vectorizable
&& (
#if EIGEN_ALIGN_STATICALLY
((!is_dynamic_size_storage) && (((MaxCols*MaxRows) % ei_packet_traits<Scalar>::size) == 0))
((!is_dynamic_size_storage) && (((MaxCols*MaxRows) % packet_traits<Scalar>::size) == 0))
#else
0
#endif
@@ -141,95 +143,95 @@ class ei_compute_matrix_flags
)
) ? AlignedBit : 0,
packet_access_bit = ei_packet_traits<Scalar>::Vectorizable && aligned_bit ? PacketAccessBit : 0
packet_access_bit = packet_traits<Scalar>::Vectorizable && aligned_bit ? PacketAccessBit : 0
};
public:
enum { ret = LinearAccessBit | LvalueBit | DirectAccessBit | NestByRefBit | packet_access_bit | row_major_bit | aligned_bit };
};
template<int _Rows, int _Cols> struct ei_size_at_compile_time
template<int _Rows, int _Cols> struct size_at_compile_time
{
enum { ret = (_Rows==Dynamic || _Cols==Dynamic) ? Dynamic : _Rows * _Cols };
};
/* ei_plain_matrix_type : the difference from ei_eval is that ei_plain_matrix_type is always a plain matrix type,
* whereas ei_eval is a const reference in the case of a matrix
/* plain_matrix_type : the difference from eval is that plain_matrix_type is always a plain matrix type,
* whereas eval is a const reference in the case of a matrix
*/
template<typename T, typename StorageKind = typename ei_traits<T>::StorageKind> struct ei_plain_matrix_type;
template<typename T, typename BaseClassType> struct ei_plain_matrix_type_dense;
template<typename T> struct ei_plain_matrix_type<T,Dense>
template<typename T, typename StorageKind = typename traits<T>::StorageKind> struct plain_matrix_type;
template<typename T, typename BaseClassType> struct plain_matrix_type_dense;
template<typename T> struct plain_matrix_type<T,Dense>
{
typedef typename ei_plain_matrix_type_dense<T,typename ei_traits<T>::XprKind>::type type;
typedef typename plain_matrix_type_dense<T,typename traits<T>::XprKind>::type type;
};
template<typename T> struct ei_plain_matrix_type_dense<T,MatrixXpr>
template<typename T> struct plain_matrix_type_dense<T,MatrixXpr>
{
typedef Matrix<typename ei_traits<T>::Scalar,
ei_traits<T>::RowsAtCompileTime,
ei_traits<T>::ColsAtCompileTime,
AutoAlign | (ei_traits<T>::Flags&RowMajorBit ? RowMajor : ColMajor),
ei_traits<T>::MaxRowsAtCompileTime,
ei_traits<T>::MaxColsAtCompileTime
typedef Matrix<typename traits<T>::Scalar,
traits<T>::RowsAtCompileTime,
traits<T>::ColsAtCompileTime,
AutoAlign | (traits<T>::Flags&RowMajorBit ? RowMajor : ColMajor),
traits<T>::MaxRowsAtCompileTime,
traits<T>::MaxColsAtCompileTime
> type;
};
template<typename T> struct ei_plain_matrix_type_dense<T,ArrayXpr>
template<typename T> struct plain_matrix_type_dense<T,ArrayXpr>
{
typedef Array<typename ei_traits<T>::Scalar,
ei_traits<T>::RowsAtCompileTime,
ei_traits<T>::ColsAtCompileTime,
AutoAlign | (ei_traits<T>::Flags&RowMajorBit ? RowMajor : ColMajor),
ei_traits<T>::MaxRowsAtCompileTime,
ei_traits<T>::MaxColsAtCompileTime
typedef Array<typename traits<T>::Scalar,
traits<T>::RowsAtCompileTime,
traits<T>::ColsAtCompileTime,
AutoAlign | (traits<T>::Flags&RowMajorBit ? RowMajor : ColMajor),
traits<T>::MaxRowsAtCompileTime,
traits<T>::MaxColsAtCompileTime
> type;
};
/* ei_eval : the return type of eval(). For matrices, this is just a const reference
/* eval : the return type of eval(). For matrices, this is just a const reference
* in order to avoid a useless copy
*/
template<typename T, typename StorageKind = typename ei_traits<T>::StorageKind> struct ei_eval;
template<typename T, typename StorageKind = typename traits<T>::StorageKind> struct eval;
template<typename T> struct ei_eval<T,Dense>
template<typename T> struct eval<T,Dense>
{
typedef typename ei_plain_matrix_type<T>::type type;
typedef typename plain_matrix_type<T>::type type;
// typedef typename T::PlainObject type;
// typedef T::Matrix<typename ei_traits<T>::Scalar,
// ei_traits<T>::RowsAtCompileTime,
// ei_traits<T>::ColsAtCompileTime,
// AutoAlign | (ei_traits<T>::Flags&RowMajorBit ? RowMajor : ColMajor),
// ei_traits<T>::MaxRowsAtCompileTime,
// ei_traits<T>::MaxColsAtCompileTime
// typedef T::Matrix<typename traits<T>::Scalar,
// traits<T>::RowsAtCompileTime,
// traits<T>::ColsAtCompileTime,
// AutoAlign | (traits<T>::Flags&RowMajorBit ? RowMajor : ColMajor),
// traits<T>::MaxRowsAtCompileTime,
// traits<T>::MaxColsAtCompileTime
// > type;
};
// for matrices, no need to evaluate, just use a const reference to avoid a useless copy
template<typename _Scalar, int _Rows, int _Cols, int _Options, int _MaxRows, int _MaxCols>
struct ei_eval<Matrix<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols>, Dense>
struct eval<Matrix<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols>, Dense>
{
typedef const Matrix<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols>& type;
};
template<typename _Scalar, int _Rows, int _Cols, int _Options, int _MaxRows, int _MaxCols>
struct ei_eval<Array<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols>, Dense>
struct eval<Array<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols>, Dense>
{
typedef const Array<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols>& type;
};
/* ei_plain_matrix_type_column_major : same as ei_plain_matrix_type but guaranteed to be column-major
/* plain_matrix_type_column_major : same as plain_matrix_type but guaranteed to be column-major
*/
template<typename T> struct ei_plain_matrix_type_column_major
template<typename T> struct plain_matrix_type_column_major
{
enum { Rows = ei_traits<T>::RowsAtCompileTime,
Cols = ei_traits<T>::ColsAtCompileTime,
MaxRows = ei_traits<T>::MaxRowsAtCompileTime,
MaxCols = ei_traits<T>::MaxColsAtCompileTime
enum { Rows = traits<T>::RowsAtCompileTime,
Cols = traits<T>::ColsAtCompileTime,
MaxRows = traits<T>::MaxRowsAtCompileTime,
MaxCols = traits<T>::MaxColsAtCompileTime
};
typedef Matrix<typename ei_traits<T>::Scalar,
typedef Matrix<typename traits<T>::Scalar,
Rows,
Cols,
(MaxRows==1&&MaxCols!=1) ? RowMajor : ColMajor,
@@ -238,16 +240,16 @@ template<typename T> struct ei_plain_matrix_type_column_major
> type;
};
/* ei_plain_matrix_type_row_major : same as ei_plain_matrix_type but guaranteed to be row-major
/* plain_matrix_type_row_major : same as plain_matrix_type but guaranteed to be row-major
*/
template<typename T> struct ei_plain_matrix_type_row_major
template<typename T> struct plain_matrix_type_row_major
{
enum { Rows = ei_traits<T>::RowsAtCompileTime,
Cols = ei_traits<T>::ColsAtCompileTime,
MaxRows = ei_traits<T>::MaxRowsAtCompileTime,
MaxCols = ei_traits<T>::MaxColsAtCompileTime
enum { Rows = traits<T>::RowsAtCompileTime,
Cols = traits<T>::ColsAtCompileTime,
MaxRows = traits<T>::MaxRowsAtCompileTime,
MaxCols = traits<T>::MaxColsAtCompileTime
};
typedef Matrix<typename ei_traits<T>::Scalar,
typedef Matrix<typename traits<T>::Scalar,
Rows,
Cols,
(MaxCols==1&&MaxRows!=1) ? RowMajor : ColMajor,
@@ -257,16 +259,16 @@ template<typename T> struct ei_plain_matrix_type_row_major
};
// we should be able to get rid of this one too
template<typename T> struct ei_must_nest_by_value { enum { ret = false }; };
template<typename T> struct must_nest_by_value { enum { ret = false }; };
template<class T>
struct ei_is_reference
struct is_reference
{
enum { ret = false };
};
template<class T>
struct ei_is_reference<T&>
struct is_reference<T&>
{
enum { ret = true };
};
@@ -277,10 +279,10 @@ struct ei_is_reference<T&>
* objects which should generate no copying overhead.
**/
template <typename T>
struct ei_ref_selector
struct ref_selector
{
typedef typename ei_meta_if<
bool(ei_traits<T>::Flags & NestByRefBit),
typedef typename meta_if<
bool(traits<T>::Flags & NestByRefBit),
T const&,
T
>::ret type;
@@ -298,70 +300,70 @@ struct ei_ref_selector
*
* Example. Suppose that a, b, and c are of type Matrix3d. The user forms the expression a*(b+c).
* b+c is an expression "sum of matrices", which we will denote by S. In order to determine how to nest it,
* the Product expression uses: ei_nested<S, 3>::ret, which turns out to be Matrix3d because the internal logic of
* ei_nested determined that in this case it was better to evaluate the expression b+c into a temporary. On the other hand,
* since a is of type Matrix3d, the Product expression nests it as ei_nested<Matrix3d, 3>::ret, which turns out to be
* const Matrix3d&, because the internal logic of ei_nested determined that since a was already a matrix, there was no point
* the Product expression uses: nested<S, 3>::ret, which turns out to be Matrix3d because the internal logic of
* nested determined that in this case it was better to evaluate the expression b+c into a temporary. On the other hand,
* since a is of type Matrix3d, the Product expression nests it as nested<Matrix3d, 3>::ret, which turns out to be
* const Matrix3d&, because the internal logic of nested determined that since a was already a matrix, there was no point
* in copying it into another matrix.
*/
template<typename T, int n=1, typename PlainObject = typename ei_eval<T>::type> struct ei_nested
template<typename T, int n=1, typename PlainObject = typename eval<T>::type> struct nested
{
// this is a direct port of the logic used when Dynamic was 33331, to make an atomic commit.
enum {
_ScalarReadCost = NumTraits<typename ei_traits<T>::Scalar>::ReadCost,
_ScalarReadCost = NumTraits<typename traits<T>::Scalar>::ReadCost,
ScalarReadCost = _ScalarReadCost == Dynamic ? 33331 : int(_ScalarReadCost),
_CoeffReadCost = int(ei_traits<T>::CoeffReadCost),
_CoeffReadCost = int(traits<T>::CoeffReadCost),
CoeffReadCost = _CoeffReadCost == Dynamic ? 33331 : int(_CoeffReadCost),
N = n == Dynamic ? 33331 : n,
CostEval = (N+1) * int(ScalarReadCost),
CostNoEval = (N-1) * int(CoeffReadCost)
};
typedef typename ei_meta_if<
( int(ei_traits<T>::Flags) & EvalBeforeNestingBit ) ||
typedef typename meta_if<
( int(traits<T>::Flags) & EvalBeforeNestingBit ) ||
( int(CostEval) <= int(CostNoEval) ),
PlainObject,
typename ei_ref_selector<T>::type
typename ref_selector<T>::type
>::ret type;
/* this is what the above logic should be updated to look like:
enum {
ScalarReadCost = NumTraits<typename ei_traits<T>::Scalar>::ReadCost,
CoeffReadCost = ei_traits<T>::CoeffReadCost,
ScalarReadCost = NumTraits<typename traits<T>::Scalar>::ReadCost,
CoeffReadCost = traits<T>::CoeffReadCost,
CostEval = n == Dynamic || ScalarReadCost == Dynamic ? int(Dynamic) : (n+1) * int(ScalarReadCost),
CostNoEval = n == Dynamic || (CoeffReadCost == Dynamic && n>1) ? int(Dynamic) : (n-1) * int(CoeffReadCost)
};
typedef typename ei_meta_if<
( int(ei_traits<T>::Flags) & EvalBeforeNestingBit ) ||
typedef typename meta_if<
( int(traits<T>::Flags) & EvalBeforeNestingBit ) ||
( int(CostNoEval) == Dynamic ? true
: int(CostEval) == Dynamic ? false
: int(CostEval) <= int(CostNoEval) ),
PlainObject,
typename ei_ref_selector<T>::type
typename ref_selector<T>::type
>::ret type;
*/
};
template<unsigned int Flags> struct ei_are_flags_consistent
template<unsigned int Flags> struct are_flags_consistent
{
enum { ret = EIGEN_IMPLIES(bool(Flags&DirectAccessBit), bool(Flags&LvalueBit)) };
};
template<typename Derived, typename XprKind = typename ei_traits<Derived>::XprKind>
struct ei_dense_xpr_base
template<typename Derived, typename XprKind = typename traits<Derived>::XprKind>
struct dense_xpr_base
{
/* ei_dense_xpr_base should only ever be used on dense expressions, thus falling either into the MatrixXpr or into the ArrayXpr cases */
/* dense_xpr_base should only ever be used on dense expressions, thus falling either into the MatrixXpr or into the ArrayXpr cases */
};
template<typename Derived>
struct ei_dense_xpr_base<Derived, MatrixXpr>
struct dense_xpr_base<Derived, MatrixXpr>
{
typedef MatrixBase<Derived> type;
};
template<typename Derived>
struct ei_dense_xpr_base<Derived, ArrayXpr>
struct dense_xpr_base<Derived, ArrayXpr>
{
typedef ArrayBase<Derived> type;
};
@@ -369,27 +371,27 @@ struct ei_dense_xpr_base<Derived, ArrayXpr>
/** \internal Helper base class to add a scalar multiple operator
* overloads for complex types */
template<typename Derived,typename Scalar,typename OtherScalar,
bool EnableIt = !ei_is_same_type<Scalar,OtherScalar>::ret >
struct ei_special_scalar_op_base : public DenseCoeffsBase<Derived>
bool EnableIt = !is_same_type<Scalar,OtherScalar>::ret >
struct special_scalar_op_base : public DenseCoeffsBase<Derived>
{
// dummy operator* so that the
// "using ei_special_scalar_op_base::operator*" compiles
// "using special_scalar_op_base::operator*" compiles
void operator*() const;
};
template<typename Derived,typename Scalar,typename OtherScalar>
struct ei_special_scalar_op_base<Derived,Scalar,OtherScalar,true> : public DenseCoeffsBase<Derived>
struct special_scalar_op_base<Derived,Scalar,OtherScalar,true> : public DenseCoeffsBase<Derived>
{
const CwiseUnaryOp<ei_scalar_multiple2_op<Scalar,OtherScalar>, Derived>
const CwiseUnaryOp<scalar_multiple2_op<Scalar,OtherScalar>, Derived>
operator*(const OtherScalar& scalar) const
{
return CwiseUnaryOp<ei_scalar_multiple2_op<Scalar,OtherScalar>, Derived>
(*static_cast<const Derived*>(this), ei_scalar_multiple2_op<Scalar,OtherScalar>(scalar));
return CwiseUnaryOp<scalar_multiple2_op<Scalar,OtherScalar>, Derived>
(*static_cast<const Derived*>(this), scalar_multiple2_op<Scalar,OtherScalar>(scalar));
}
inline friend const CwiseUnaryOp<ei_scalar_multiple2_op<Scalar,OtherScalar>, Derived>
inline friend const CwiseUnaryOp<scalar_multiple2_op<Scalar,OtherScalar>, Derived>
operator*(const OtherScalar& scalar, const Derived& matrix)
{ return static_cast<const ei_special_scalar_op_base&>(matrix).operator*(scalar); }
{ return static_cast<const special_scalar_op_base&>(matrix).operator*(scalar); }
};
template<typename ExpressionType> struct HNormalizedReturnType {
@@ -399,24 +401,24 @@ template<typename ExpressionType> struct HNormalizedReturnType {
SizeMinusOne = SizeAtCompileTime==Dynamic ? Dynamic : SizeAtCompileTime-1
};
typedef Block<ExpressionType,
ei_traits<ExpressionType>::ColsAtCompileTime==1 ? SizeMinusOne : 1,
ei_traits<ExpressionType>::ColsAtCompileTime==1 ? 1 : SizeMinusOne> StartMinusOne;
typedef CwiseUnaryOp<ei_scalar_quotient1_op<typename ei_traits<ExpressionType>::Scalar>,
traits<ExpressionType>::ColsAtCompileTime==1 ? SizeMinusOne : 1,
traits<ExpressionType>::ColsAtCompileTime==1 ? 1 : SizeMinusOne> StartMinusOne;
typedef CwiseUnaryOp<scalar_quotient1_op<typename traits<ExpressionType>::Scalar>,
StartMinusOne > Type;
};
template<typename XprType, typename CastType> struct ei_cast_return_type
template<typename XprType, typename CastType> struct cast_return_type
{
typedef typename XprType::Scalar CurrentScalarType;
typedef typename ei_cleantype<CastType>::type _CastType;
typedef typename cleantype<CastType>::type _CastType;
typedef typename _CastType::Scalar NewScalarType;
typedef typename ei_meta_if<ei_is_same_type<CurrentScalarType,NewScalarType>::ret,
typedef typename meta_if<is_same_type<CurrentScalarType,NewScalarType>::ret,
const XprType&,CastType>::ret type;
};
template <typename A, typename B> struct ei_promote_storage_type;
template <typename A, typename B> struct promote_storage_type;
template <typename A> struct ei_promote_storage_type<A,A>
template <typename A> struct promote_storage_type<A,A>
{
typedef A ret;
};
@@ -425,37 +427,37 @@ template <typename A> struct ei_promote_storage_type<A,A>
* \param Scalar optional parameter allowing to pass a different scalar type than the one of the MatrixType.
*/
template<typename ExpressionType, typename Scalar = typename ExpressionType::Scalar>
struct ei_plain_row_type
struct plain_row_type
{
typedef Matrix<Scalar, 1, ExpressionType::ColsAtCompileTime,
ExpressionType::PlainObject::Options | RowMajor, 1, ExpressionType::MaxColsAtCompileTime> MatrixRowType;
typedef Array<Scalar, 1, ExpressionType::ColsAtCompileTime,
ExpressionType::PlainObject::Options | RowMajor, 1, ExpressionType::MaxColsAtCompileTime> ArrayRowType;
typedef typename ei_meta_if<
ei_is_same_type< typename ei_traits<ExpressionType>::XprKind, MatrixXpr >::ret,
typedef typename meta_if<
is_same_type< typename traits<ExpressionType>::XprKind, MatrixXpr >::ret,
MatrixRowType,
ArrayRowType
>::ret type;
};
template<typename ExpressionType, typename Scalar = typename ExpressionType::Scalar>
struct ei_plain_col_type
struct plain_col_type
{
typedef Matrix<Scalar, ExpressionType::RowsAtCompileTime, 1,
ExpressionType::PlainObject::Options & ~RowMajor, ExpressionType::MaxRowsAtCompileTime, 1> MatrixColType;
typedef Array<Scalar, ExpressionType::RowsAtCompileTime, 1,
ExpressionType::PlainObject::Options & ~RowMajor, ExpressionType::MaxRowsAtCompileTime, 1> ArrayColType;
typedef typename ei_meta_if<
ei_is_same_type< typename ei_traits<ExpressionType>::XprKind, MatrixXpr >::ret,
typedef typename meta_if<
is_same_type< typename traits<ExpressionType>::XprKind, MatrixXpr >::ret,
MatrixColType,
ArrayColType
>::ret type;
};
template<typename ExpressionType, typename Scalar = typename ExpressionType::Scalar>
struct ei_plain_diag_type
struct plain_diag_type
{
enum { diag_size = EIGEN_SIZE_MIN_PREFER_DYNAMIC(ExpressionType::RowsAtCompileTime, ExpressionType::ColsAtCompileTime),
max_diag_size = EIGEN_SIZE_MIN_PREFER_FIXED(ExpressionType::MaxRowsAtCompileTime, ExpressionType::MaxColsAtCompileTime)
@@ -463,11 +465,13 @@ struct ei_plain_diag_type
typedef Matrix<Scalar, diag_size, 1, ExpressionType::PlainObject::Options & ~RowMajor, max_diag_size, 1> MatrixDiagType;
typedef Array<Scalar, diag_size, 1, ExpressionType::PlainObject::Options & ~RowMajor, max_diag_size, 1> ArrayDiagType;
typedef typename ei_meta_if<
ei_is_same_type< typename ei_traits<ExpressionType>::XprKind, MatrixXpr >::ret,
typedef typename meta_if<
is_same_type< typename traits<ExpressionType>::XprKind, MatrixXpr >::ret,
MatrixDiagType,
ArrayDiagType
>::ret type;
};
} // end namespace internal
#endif // EIGEN_XPRHELPER_H