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Resolve "IndexedView of a vector should allow linear access"

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Christopher Moore 2020-05-13 19:24:42 +00:00 committed by Rasmus Munk Larsen
parent ba9d18b938
commit a187ffea28
2 changed files with 40 additions and 2 deletions
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32
Eigen/src/Core/IndexedView.h
View File

@ -54,7 +54,8 @@ struct traits<IndexedView<XprType, RowIndices, ColIndices> >
DirectAccessMask = (int(InnerIncr)!=UndefinedIncr && int(OuterIncr)!=UndefinedIncr && InnerIncr>=0 && OuterIncr>=0) ? DirectAccessBit : 0,
FlagsRowMajorBit = IsRowMajor ? RowMajorBit : 0,
FlagsLvalueBit = is_lvalue<XprType>::value ? LvalueBit : 0,
Flags = (traits<XprType>::Flags & (HereditaryBits | DirectAccessMask)) | FlagsLvalueBit | FlagsRowMajorBit
FlagsLinearAccessBit = (RowsAtCompileTime == 1 || ColsAtCompileTime == 1) ? LinearAccessBit : 0,
Flags = (traits<XprType>::Flags & (HereditaryBits | DirectAccessMask )) | FlagsLvalueBit | FlagsRowMajorBit | FlagsLinearAccessBit
};
typedef Block<XprType,RowsAtCompileTime,ColsAtCompileTime,IsInnerPannel> BlockType;
@ -168,7 +169,9 @@ struct unary_evaluator<IndexedView<ArgType, RowIndices, ColIndices>, IndexBased>
enum {
CoeffReadCost = evaluator<ArgType>::CoeffReadCost /* TODO + cost of row/col index */,
Flags = (evaluator<ArgType>::Flags & (HereditaryBits /*| LinearAccessBit | DirectAccessBit*/)),
FlagsLinearAccessBit = (traits<XprType>::RowsAtCompileTime == 1 || traits<XprType>::ColsAtCompileTime == 1) ? LinearAccessBit : 0,
Flags = (evaluator<ArgType>::Flags & (HereditaryBits /*| LinearAccessBit | DirectAccessBit*/)) | FlagsLinearAccessBit,
Alignment = 0
};
@ -193,6 +196,31 @@ struct unary_evaluator<IndexedView<ArgType, RowIndices, ColIndices>, IndexBased>
return m_argImpl.coeffRef(m_xpr.rowIndices()[row], m_xpr.colIndices()[col]);
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
Scalar& coeffRef(Index index)
{
EIGEN_STATIC_ASSERT_LVALUE(XprType)
Index row = XprType::RowsAtCompileTime == 1 ? 0 : index;
Index col = XprType::RowsAtCompileTime == 1 ? index : 0;
return m_argImpl.coeffRef( m_xpr.rowIndices()[row], m_xpr.colIndices()[col]);
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
const Scalar& coeffRef(Index index) const
{
Index row = XprType::RowsAtCompileTime == 1 ? 0 : index;
Index col = XprType::RowsAtCompileTime == 1 ? index : 0;
return m_argImpl.coeffRef( m_xpr.rowIndices()[row], m_xpr.colIndices()[col]);
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
const CoeffReturnType coeff(Index index) const
{
Index row = XprType::RowsAtCompileTime == 1 ? 0 : index;
Index col = XprType::RowsAtCompileTime == 1 ? index : 0;
return m_argImpl.coeff( m_xpr.rowIndices()[row], m_xpr.colIndices()[col]);
}
protected:
evaluator<ArgType> m_argImpl;

10
test/indexed_view.cpp
View File

@ -429,6 +429,16 @@ void check_indexed_view()
A(all, eii).col(0) = A.col(eii(0));
}
// bug 1815: IndexedView should allow linear access
{
VERIFY( MATCH( b(eii)(0), "3" ) );
VERIFY( MATCH( a(eii)(0), "3" ) );
VERIFY( MATCH( A(1,eii)(0), "103"));
VERIFY( MATCH( A(eii,1)(0), "301"));
VERIFY( MATCH( A(1,all)(1), "101"));
VERIFY( MATCH( A(all,1)(1), "101"));
}
}
EIGEN_DECLARE_TEST(indexed_view)