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Generalize expr/expr and scalar/expr wrt scalar types.

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This commit is contained in:
Gael Guennebaud 2016-06-14 15:26:37 +02:00
parent 62134082aa
commit 70dad84b73
3 changed files with 31 additions and 11 deletions
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34
Eigen/src/Core/GlobalFunctions.h
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@ -175,18 +175,36 @@ namespace Eigen
#endif
/**
* \brief Component-wise division of a scalar by array elements.
* \brief Component-wise division of the scalar \a s by array elements of \a a.
*
* \tparam Scalar is the scalar type of \a x. It must be compatible with the scalar type of the given array expression (\c Derived::Scalar).
*
* \relates ArrayBase
**/
template <typename Derived>
inline const Eigen::CwiseUnaryOp<Eigen::internal::scalar_inverse_mult_op<typename Derived::Scalar>, const Derived>
operator/(const typename Derived::Scalar& s, const Eigen::ArrayBase<Derived>& a)
#ifdef EIGEN_PARSED_BY_DOXYGEN
template<typename Scalar,typename Derived>
inline const CwiseBinaryOp<internal::scalar_quotient_op<Scalar,Derived::Scalar>,Constant<Scalar>,Derived>
operator/(const Scalar& s,const Eigen::ArrayBase<Derived>& a);
#else
template<typename Scalar, typename Derived>
inline typename internal::enable_if< !(internal::is_same<typename Derived::Scalar,Scalar>::value)
&& ScalarBinaryOpTraits<Scalar,typename Derived::Scalar>::Defined,
const EIGEN_SCALAR_BINARYOP_EXPR_RETURN_TYPE(Scalar,Derived,quotient) >::type
operator/(const Scalar& s, const Eigen::ArrayBase<Derived>& a)
{
return Eigen::CwiseUnaryOp<Eigen::internal::scalar_inverse_mult_op<typename Derived::Scalar>, const Derived>(
a.derived(),
Eigen::internal::scalar_inverse_mult_op<typename Derived::Scalar>(s)
);
return EIGEN_SCALAR_BINARYOP_EXPR_RETURN_TYPE(Scalar,Derived,quotient)(
typename internal::plain_constant_type<Derived,Scalar>::type(a.rows(), a.cols(), s), a.derived() );
}
template<typename Derived>
inline const EIGEN_SCALAR_BINARYOP_EXPR_RETURN_TYPE(typename Derived::Scalar,Derived,quotient)
operator/(const typename Derived::Scalar& s, const Eigen::ArrayBase<Derived>& a)
{
return EIGEN_SCALAR_BINARYOP_EXPR_RETURN_TYPE(typename Derived::Scalar,Derived,quotient)(
typename internal::plain_constant_type<Derived,typename Derived::Scalar>::type(a.rows(), a.cols(), s), a.derived() );
}
#endif
/** \cpp11 \returns an expression of the coefficient-wise igamma(\a a, \a x) to the given arrays.
*
* This function computes the coefficient-wise incomplete gamma function.

4
Eigen/src/plugins/ArrayCwiseBinaryOps.h
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@ -17,10 +17,10 @@ operator*(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const
*/
template<typename OtherDerived>
EIGEN_DEVICE_FUNC
EIGEN_STRONG_INLINE const CwiseBinaryOp<internal::scalar_quotient_op<Scalar>, const Derived, const OtherDerived>
EIGEN_STRONG_INLINE const CwiseBinaryOp<internal::scalar_quotient_op<Scalar,typename OtherDerived::Scalar>, const Derived, const OtherDerived>
operator/(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const
{
return CwiseBinaryOp<internal::scalar_quotient_op<Scalar>, const Derived, const OtherDerived>(derived(), other.derived());
return CwiseBinaryOp<internal::scalar_quotient_op<Scalar,typename OtherDerived::Scalar>, const Derived, const OtherDerived>(derived(), other.derived());
}
/** \returns an expression of the coefficient-wise min of \c *this and \a other

4
test/mixingtypes.cpp
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@ -82,6 +82,8 @@ template<int SizeAtCompileType> void mixingtypes(int size = SizeAtCompileType)
// check scalar quotients
VERIFY_MIX_SCALAR(vcf / sf , vcf / complex<float>(sf));
VERIFY_MIX_SCALAR(vf / scf , vf.template cast<complex<float> >() / scf);
VERIFY_MIX_SCALAR(vf.array() / scf, vf.template cast<complex<float> >().array() / scf);
VERIFY_MIX_SCALAR(scd / vd.array() , scd / vd.template cast<complex<double> >().array());
// check scalar increment
VERIFY_MIX_SCALAR(vcf.array() + sf , vcf.array() + complex<float>(sf));
@ -225,7 +227,7 @@ template<int SizeAtCompileType> void mixingtypes(int size = SizeAtCompileType)
VERIFY_IS_APPROX( md.array() - mcd.array(), md.template cast<CD>().eval().array() - mcd.array() );
VERIFY_IS_APPROX( mcd.array() - md.array(), mcd.array() - md.template cast<CD>().eval().array() );
// VERIFY_IS_APPROX( md.array() / mcd.array(), md.template cast<CD>().eval().array() / mcd.array() );
VERIFY_IS_APPROX( md.array() / mcd.array(), md.template cast<CD>().eval().array() / mcd.array() );
VERIFY_IS_APPROX( mcd.array() / md.array(), mcd.array() / md.template cast<CD>().eval().array() );
VERIFY_IS_APPROX( md.array().pow(mcd.array()), md.template cast<CD>().eval().array().pow(mcd.array()) );