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| author |  Gael Guennebaud <g.gael@free.fr> | 2016-06-02 22:16:37 +0200 |
|---|---|---|
| committer | Gael Guennebaud <g.gael@free.fr> | 2016-06-02 22:16:37 +0200 |
| commit | 2c00ac0b53a207b1bcc303d3e02ded2edb8ca021 (patch) | |
| tree | 4d46b297350f496ef8de2f04e4e3c970c3da1d2a /Eigen/src/plugins/CommonCwiseUnaryOps.h | |
| parent | 8b6f53222b84d1e4f0f1e86b1d321777b58a28dc (diff) | |
Implement generic scalar*expr and expr*scalar operator based on scalar_product_traits.
This is especially useful for custom scalar types, e.g., to enable float*expr<multi_prec> without conversion.
Diffstat (limited to 'Eigen/src/plugins/CommonCwiseUnaryOps.h')
| -rw-r--r-- | Eigen/src/plugins/CommonCwiseUnaryOps.h | 44 |
1 files changed, 35 insertions, 9 deletions
diff --git a/Eigen/src/plugins/CommonCwiseUnaryOps.h b/Eigen/src/plugins/CommonCwiseUnaryOps.h index 050bce03c..67ec601b9 100644 --- a/Eigen/src/plugins/CommonCwiseUnaryOps.h +++ b/Eigen/src/plugins/CommonCwiseUnaryOps.h @@ -70,12 +70,18 @@ operator/(const Scalar& scalar) const return ScalarQuotient1ReturnType(derived(), internal::scalar_quotient1_op<Scalar>(scalar)); } -/** Overloaded for efficient real matrix times complex scalar value */ -EIGEN_DEVICE_FUNC -inline const ScalarComplexMultipleReturnType -operator*(const std::complex<Scalar>& scalar) const +/** Overloaded for efficiently multipling with compatible scalar types */ +template <typename T> +EIGEN_DEVICE_FUNC inline +typename internal::enable_if<internal::scalar_product_traits<T,Scalar>::Defined, + const CwiseUnaryOp<internal::scalar_multiple2_op<Scalar,T>, const Derived> >::type +operator*(const T& scalar) const { - return ScalarComplexMultipleReturnType(derived(), internal::scalar_multiple2_op<Scalar,std::complex<Scalar> >(scalar)); +#ifdef EIGEN_SPECIAL_SCALAR_MULTIPLE_PLUGIN + EIGEN_SPECIAL_SCALAR_MULTIPLE_PLUGIN +#endif + return CwiseUnaryOp<internal::scalar_multiple2_op<Scalar,T>, const Derived>( + derived(), internal::scalar_multiple2_op<Scalar,T>(scalar) ); } EIGEN_DEVICE_FUNC @@ -83,11 +89,31 @@ inline friend const ScalarMultipleReturnType operator*(const Scalar& scalar, const StorageBaseType& matrix) { return matrix*scalar; } -EIGEN_DEVICE_FUNC -inline friend const CwiseUnaryOp<internal::scalar_multiple2_op<Scalar,std::complex<Scalar> >, const Derived> -operator*(const std::complex<Scalar>& scalar, const StorageBaseType& matrix) -{ return matrix*scalar; } +template <typename T> +EIGEN_DEVICE_FUNC inline friend +typename internal::enable_if<internal::scalar_product_traits<Scalar,T>::Defined, + const CwiseUnaryOp<internal::scalar_multiple2_op<Scalar,T>, const Derived> >::type +operator*(const T& scalar, const StorageBaseType& matrix) +{ +#ifdef EIGEN_SPECIAL_SCALAR_MULTIPLE_PLUGIN + EIGEN_SPECIAL_SCALAR_MULTIPLE_PLUGIN +#endif + return CwiseUnaryOp<internal::scalar_multiple2_op<Scalar,T>, const Derived>( + matrix.derived(), internal::scalar_multiple2_op<Scalar,T>(scalar) ); +} +template <typename T> +EIGEN_DEVICE_FUNC inline +typename internal::enable_if<internal::scalar_product_traits<Scalar,T>::Defined, + const CwiseUnaryOp<internal::scalar_quotient2_op<Scalar,T>, const Derived> >::type +operator/(const T& scalar) const +{ +#ifdef EIGEN_SPECIAL_SCALAR_MULTIPLE_PLUGIN + EIGEN_SPECIAL_SCALAR_MULTIPLE_PLUGIN +#endif + return CwiseUnaryOp<internal::scalar_quotient2_op<Scalar,T>, const Derived>( + derived(), internal::scalar_quotient2_op<Scalar,T>(scalar) ); +} template<class NewType> struct CastXpr { typedef typename internal::cast_return_type<Derived,const CwiseUnaryOp<internal::scalar_cast_op<Scalar, NewType>, const Derived> >::type Type; }; |