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Add coeff-wise comparisons to scalar operators. You can now write:

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mat.cwise() < 2
instead of:
   mat.cwise() < MatrixType::Constant(mat.rows(), mat.cols(), 2)
This commit is contained in:
Gael Guennebaud
2008-09-03 17:56:06 +00:00
parent 59dc1da5bf
commit e14aa8c8aa
3 changed files with 130 additions and 0 deletions
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24
Eigen/src/Core/Cwise.h
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@@ -36,6 +36,12 @@
#define EIGEN_CWISE_UNOP_RETURN_TYPE(OP) \
CwiseUnaryOp<OP<typename ei_traits<ExpressionType>::Scalar>, ExpressionType>
/** \internal
* convenient macro to defined the return type of a cwise comparison to a scalar */
#define EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(OP) \
CwiseBinaryOp<OP<typename ei_traits<ExpressionType>::Scalar>, ExpressionType, \
NestByValue<typename ExpressionType::ConstantReturnType> >
/** \class Cwise
*
* \brief Pseudo expression providing additional coefficient-wise operations
@@ -128,6 +134,24 @@ template<typename ExpressionType> class Cwise
template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::not_equal_to)
operator!=(const MatrixBase<OtherDerived>& other) const;
// comparisons to a scalar value
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::less)
operator<(Scalar s) const;
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::less_equal)
operator<=(Scalar s) const;
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::greater)
operator>(Scalar s) const;
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::greater_equal)
operator>=(Scalar s) const;
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::equal_to)
operator==(Scalar s) const;
const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::not_equal_to)
operator!=(Scalar s) const;
protected:
ExpressionTypeNested m_matrix;