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merge with default branch

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This commit is contained in:
Gael Guennebaud
2009-12-22 22:51:08 +01:00
parent e182e9c616 eeec7d842e
commit eaaba30cac
200 changed files with 3649 additions and 1636 deletions
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53
Eigen/src/Core/util/XprHelper.h
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@@ -28,10 +28,11 @@
// just a workaround because GCC seems to not really like empty structs
#ifdef __GNUG__
struct ei_empty_struct{char _ei_dummy_;};
#define EIGEN_EMPTY_STRUCT : Eigen::ei_empty_struct
#define EIGEN_EMPTY_STRUCT_CTOR(X) \
EIGEN_STRONG_INLINE X() {} \
EIGEN_STRONG_INLINE X(const X&) {}
#else
#define EIGEN_EMPTY_STRUCT
#define EIGEN_EMPTY_STRUCT_CTOR(X)
#endif
//classes inheriting ei_no_assignment_operator don't generate a default operator=.
@@ -45,10 +46,10 @@ class ei_no_assignment_operator
* can be accessed using value() and setValue().
* 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:
ei_int_if_dynamic() {}
EIGEN_EMPTY_STRUCT_CTOR(ei_int_if_dynamic)
explicit ei_int_if_dynamic(int) {}
static int value() { return Value; }
void setValue(int) {}
@@ -214,8 +215,35 @@ template<typename T> struct ei_plain_matrix_type_row_major
> type;
};
// 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 ei_must_nest_by_value<NestByValue<T> > { enum { ret = true }; };
/**
* The reference selector for template expressions. The idea is that we don't
* need to use references for expressions since they are light weight proxy
* objects which should generate no copying overhead.
**/
template <typename T>
struct ei_ref_selector
{
typedef T type;
};
/**
* Matrices on the other hand side should only be copied, when it is sure
* we gain by copying (see arithmetic cost check and eval before nesting flag).
* Note: This is an optimization measure that comprises potential (though little)
* to create erroneous code. Any user, utilizing ei_nested outside of
* Eigen needs to take care that no references to temporaries are
* stored or that this potential danger is at least communicated
* to the user.
**/
template<typename _Scalar, int _Rows, int _Cols, int _Options, int _MaxRows, int _MaxCols>
struct ei_ref_selector< Matrix<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols> >
{
typedef Matrix<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols> MatrixType;
typedef MatrixType const& type;
};
/** \internal Determines how a given expression should be nested into another one.
* For example, when you do a * (b+c), Eigen will determine how the expression b+c should be
@@ -241,15 +269,12 @@ template<typename T, int n=1, typename PlainMatrixType = typename ei_eval<T>::ty
CostEval = (n+1) * int(NumTraits<typename ei_traits<T>::Scalar>::ReadCost),
CostNoEval = (n-1) * int(ei_traits<T>::CoeffReadCost)
};
typedef typename ei_meta_if<
ei_must_nest_by_value<T>::ret,
T,
typename ei_meta_if<
(int(ei_traits<T>::Flags) & EvalBeforeNestingBit)
|| ( int(CostEval) <= int(CostNoEval) ),
( int(ei_traits<T>::Flags) & EvalBeforeNestingBit ) ||
( int(CostEval) <= int(CostNoEval) ),
PlainMatrixType,
const T&
>::ret
typename ei_ref_selector<T>::type
>::ret type;
};
@@ -302,7 +327,7 @@ template<typename ExpressionType> struct HNormalizedReturnType {
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>,
NestByValue<StartMinusOne> > Type;
StartMinusOne > Type;
};
template<typename XprType, typename CastType> struct ei_cast_return_type