11#ifndef EIGEN_RETURNBYVALUE_H
12#define EIGEN_RETURNBYVALUE_H
18template<
typename Derived>
19struct traits<ReturnByValue<Derived> >
20 :
public traits<typename traits<Derived>::ReturnType>
26 Flags = (traits<typename traits<Derived>::ReturnType>::Flags
38template<
typename Derived,
int n,
typename PlainObject>
39struct nested_eval<ReturnByValue<Derived>, n, PlainObject>
41 typedef typename traits<Derived>::ReturnType type;
50template<
typename Derived>
class ReturnByValue
51 :
public internal::dense_xpr_base< ReturnByValue<Derived> >::type, internal::no_assignment_operator
54 typedef typename internal::traits<Derived>::ReturnType ReturnType;
56 typedef typename internal::dense_xpr_base<ReturnByValue>::type Base;
57 EIGEN_DENSE_PUBLIC_INTERFACE(ReturnByValue)
59 template<
typename Dest>
61 inline void evalTo(Dest& dst)
const
62 {
static_cast<const Derived*
>(
this)->evalTo(dst); }
63 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
64 inline Index rows() const EIGEN_NOEXCEPT {
return static_cast<const Derived*
>(
this)->rows(); }
65 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR
66 inline Index cols() const EIGEN_NOEXCEPT {
return static_cast<const Derived*
>(
this)->cols(); }
68#ifndef EIGEN_PARSED_BY_DOXYGEN
69#define Unusable YOU_ARE_TRYING_TO_ACCESS_A_SINGLE_COEFFICIENT_IN_A_SPECIAL_EXPRESSION_WHERE_THAT_IS_NOT_ALLOWED_BECAUSE_THAT_WOULD_BE_INEFFICIENT
71 Unusable(
const Unusable&) {}
72 Unusable& operator=(
const Unusable&) {
return *
this;}
74 const Unusable& coeff(
Index)
const {
return *
reinterpret_cast<const Unusable*
>(
this); }
75 const Unusable& coeff(
Index,
Index)
const {
return *
reinterpret_cast<const Unusable*
>(
this); }
76 Unusable& coeffRef(
Index) {
return *
reinterpret_cast<Unusable*
>(
this); }
77 Unusable& coeffRef(
Index,
Index) {
return *
reinterpret_cast<Unusable*
>(
this); }
82template<
typename Derived>
83template<
typename OtherDerived>
84EIGEN_DEVICE_FUNC Derived& DenseBase<Derived>::operator=(
const ReturnByValue<OtherDerived>& other)
86 other.evalTo(derived());
96template<
typename Derived>
97struct evaluator<ReturnByValue<Derived> >
98 :
public evaluator<typename internal::traits<Derived>::ReturnType>
100 typedef ReturnByValue<Derived> XprType;
101 typedef typename internal::traits<Derived>::ReturnType PlainObject;
102 typedef evaluator<PlainObject> Base;
104 EIGEN_DEVICE_FUNC
explicit evaluator(
const XprType& xpr)
105 : m_result(xpr.rows(), xpr.cols())
107 ::new (
static_cast<Base*
>(
this)) Base(m_result);
108 xpr.evalTo(m_result);
112 PlainObject m_result;
const unsigned int EvalBeforeNestingBit
Definition: Constants.h:70
Namespace containing all symbols from the Eigen library.
Definition: Core:141
EIGEN_DEFAULT_DENSE_INDEX_TYPE Index
The Index type as used for the API.
Definition: Meta.h:74