diff options
-rw-r--r-- | Eigen/src/Core/ReturnByValue.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Eigen/src/Core/ReturnByValue.h b/Eigen/src/Core/ReturnByValue.h index 0199d3740..920269365 100644 --- a/Eigen/src/Core/ReturnByValue.h +++ b/Eigen/src/Core/ReturnByValue.h @@ -70,6 +70,18 @@ template<typename Derived> class ReturnByValue { static_cast<const Derived* const>(this)->evalTo(dst); } inline int rows() const { return static_cast<const Derived* const>(this)->rows(); } inline int cols() const { return static_cast<const Derived* const>(this)->cols(); } + +#ifndef EIGEN_PARSED_BY_DOXYGEN +#define Unusable YOU_ARE_TRYING_TO_ACCESS_A_SINGLE_COEFFICIENT_IN_A_SPECIAL_EXPRESSION_WHERE_THAT_IS_NOT_ALLOWED_BECAUSE_THAT_WOULD_BE_INEFFICIENT + class Unusable{ + Unusable(const Unusable&) {} + Unusable& operator=(const Unusable&) {return *this;} + }; + const Unusable& coeff(int) const { return *reinterpret_cast<const Unusable*>(this); } + const Unusable& coeff(int,int) const { return *reinterpret_cast<const Unusable*>(this); } + Unusable& coeffRef(int) { return *reinterpret_cast<Unusable*>(this); } + Unusable& coeffRef(int,int) { return *reinterpret_cast<Unusable*>(this); } +#endif }; template<typename Derived> |