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unfuck v.cwise()*w where v is real and w is complex

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This commit is contained in:
Benoit Jacob
2008-12-21 20:55:46 +00:00
parent 9e00d94543
commit f5a05e7ed1
4 changed files with 58 additions and 7 deletions
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36
Eigen/src/Core/util/Meta.h
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@@ -69,7 +69,7 @@ template<typename T> struct ei_cleantype<T*> { typedef typename ei_cleant
*
* It supports both the current STL mechanism (using the result_type member) as well as
* upcoming next STL generation (using a templated result member).
* If none of these members is provided, then the type of the first argument is returned.
* If none of these members is provided, then the type of the first argument is returned. FIXME, that behavior is a pretty bad hack.
*/
template<typename T> struct ei_result_of {};
@@ -146,4 +146,38 @@ class ei_meta_sqrt
template<int Y, int InfX, int SupX>
class ei_meta_sqrt<Y, InfX, SupX, true> { public: enum { ret = (SupX*SupX <= Y) ? SupX : InfX }; };
/** \internal determines whether the product of two numeric types is allowed and what the return type is */
template<typename T, typename U> struct ei_scalar_product_traits
{
// dummy general case where T and U aren't compatible -- not allowed anyway but we catch it elsewhere
//enum { Cost = NumTraits<T>::MulCost };
typedef T ReturnType;
};
template<typename T> struct ei_scalar_product_traits<T,T>
{
//enum { Cost = NumTraits<T>::MulCost };
typedef T ReturnType;
};
template<typename T> struct ei_scalar_product_traits<T,std::complex<T> >
{
//enum { Cost = 2*NumTraits<T>::MulCost };
typedef std::complex<T> ReturnType;
};
template<typename T> struct ei_scalar_product_traits<std::complex<T>, T>
{
//enum { Cost = 2*NumTraits<T>::MulCost };
typedef std::complex<T> ReturnType;
};
// FIXME quick workaround around current limitation of ei_result_of
template<typename Scalar, typename ArgType0, typename ArgType1>
struct ei_result_of<ei_scalar_product_op<Scalar>(ArgType0,ArgType1)> {
typedef typename ei_scalar_product_traits<typename ei_cleantype<ArgType0>::type, typename ei_cleantype<ArgType1>::type>::ReturnType type;
};
#endif // EIGEN_META_H