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impl basic product evaluator on top of previous one

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Gael Guennebaud 2011-03-24 09:33:36 +01:00
parent abc8c0821c
commit 42bc1f77be
1 changed files with 12 additions and 8 deletions
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20
Eigen/src/Core/CoreEvaluators.h
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@ -181,12 +181,12 @@ protected:
typename evaluator<Rhs>::type m_rhsImpl;
};
// products
// product
template<typename Lhs, typename Rhs, int ProductType>
struct evaluator_impl<GeneralProduct<Lhs,Rhs,ProductType> > : public evaluator<typename GeneralProduct<Lhs,Rhs,ProductType>::PlainObject>::type
template<typename Lhs, typename Rhs>
struct evaluator_impl<Product<Lhs,Rhs> > : public evaluator<typename Product<Lhs,Rhs>::PlainObject>::type
{
typedef GeneralProduct<Lhs,Rhs,ProductType> XprType;
typedef Product<Lhs,Rhs> XprType;
typedef typename XprType::PlainObject PlainObject;
typedef typename evaluator<PlainObject>::type evaluator_base;
@ -195,16 +195,20 @@ struct evaluator_impl<GeneralProduct<Lhs,Rhs,ProductType> > : public evaluator<t
// EvaluateRhs = ;
// };
evaluator_impl(const XprType& product) : evaluator_base(m_result), m_lhsImpl(product.lhs()), m_rhsImpl(product.rhs())
evaluator_impl(const XprType& product) : evaluator_base(m_result)
{
// here we process the left and right hand sides with a specialized evaluator
// perhaps this step should be done by the TreeOptimizer to get a canonical tree and reduce evaluator instanciations
// typename product_operand_evaluator<Lhs>::type m_lhsImpl(product.lhs());
// typename product_operand_evaluator<Rhs>::type m_rhsImpl(product.rhs());
// TODO do not rely on previous product mechanism !!
m_result.resize(product.rows(), product.cols());
product.evalTo(m_result);
m_result.noalias() = product.lhs() * product.rhs();
}
protected:
PlainObject m_result;
typename evaluator<Lhs>::type m_lhsImpl;
typename evaluator<Rhs>::type m_rhsImpl;
};
} // namespace internal