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generate a compilation error when using ReturnByValue::coeff() or coeffRef(),

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instead of doing an infinite recursion
This commit is contained in:
Benoit Jacob 2010-01-24 21:44:18 -05:00
parent 858539a6af
commit 6ae7d842a3
1 changed files with 12 additions and 0 deletions
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12
Eigen/src/Core/ReturnByValue.h
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@ -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>