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bug #1736: fix compilation issue with A(all,{1,2}).col(j) by implementing true compile-time "if" for block_evaluator<>::coeff(i)/coeffRef(i)

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This commit is contained in:
Gael Guennebaud 2019-09-11 15:40:07 +02:00
parent 031f17117d
commit 747c6a51ca
3 changed files with 41 additions and 10 deletions
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32
Eigen/src/Core/CoreEvaluators.h
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@ -1119,10 +1119,7 @@ struct unary_evaluator<Block<ArgType, BlockRows, BlockCols, InnerPanel>, IndexBa
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
CoeffReturnType coeff(Index index) const
{
if (ForwardLinearAccess)
return m_argImpl.coeff(m_linear_offset.value() + index);
else
return coeff(RowsAtCompileTime == 1 ? 0 : index, RowsAtCompileTime == 1 ? index : 0);
return linear_coeff_impl(index, bool_constant<ForwardLinearAccess>());
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
@ -1134,10 +1131,7 @@ struct unary_evaluator<Block<ArgType, BlockRows, BlockCols, InnerPanel>, IndexBa
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
Scalar& coeffRef(Index index)
{
if (ForwardLinearAccess)
return m_argImpl.coeffRef(m_linear_offset.value() + index);
else
return coeffRef(RowsAtCompileTime == 1 ? 0 : index, RowsAtCompileTime == 1 ? index : 0);
return linear_coeffRef_impl(index, bool_constant<ForwardLinearAccess>());
}
template<int LoadMode, typename PacketType>
@ -1178,6 +1172,28 @@ struct unary_evaluator<Block<ArgType, BlockRows, BlockCols, InnerPanel>, IndexBa
}
protected:
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
CoeffReturnType linear_coeff_impl(Index index, internal::true_type /* ForwardLinearAccess */) const
{
return m_argImpl.coeff(m_linear_offset.value() + index);
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
CoeffReturnType linear_coeff_impl(Index index, internal::false_type /* not ForwardLinearAccess */) const
{
return coeff(RowsAtCompileTime == 1 ? 0 : index, RowsAtCompileTime == 1 ? index : 0);
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
Scalar& linear_coeffRef_impl(Index index, internal::true_type /* ForwardLinearAccess */)
{
return m_argImpl.coeffRef(m_linear_offset.value() + index);
}
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
Scalar& linear_coeffRef_impl(Index index, internal::false_type /* not ForwardLinearAccess */)
{
return coeffRef(RowsAtCompileTime == 1 ? 0 : index, RowsAtCompileTime == 1 ? index : 0);
}
evaluator<ArgType> m_argImpl;
const variable_if_dynamic<Index, (ArgType::RowsAtCompileTime == 1 && BlockRows==1) ? 0 : Dynamic> m_startRow;
const variable_if_dynamic<Index, (ArgType::ColsAtCompileTime == 1 && BlockCols==1) ? 0 : Dynamic> m_startCol;

9
Eigen/src/Core/util/Meta.h
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@ -63,6 +63,15 @@ typedef std::size_t UIntPtr;
struct true_type { enum { value = 1 }; };
struct false_type { enum { value = 0 }; };
template<bool Condition>
struct bool_constant;
template<>
struct bool_constant<true> : true_type {};
template<>
struct bool_constant<false> : false_type {};
template<bool Condition, typename Then, typename Else>
struct conditional { typedef Then type; };

6
test/indexed_view.cpp
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@ -419,6 +419,12 @@ void check_indexed_view()
VERIFY_IS_EQUAL( A3(ind,ind).eval(), MatrixXi::Constant(5,5,A3(1,1)) );
}
// Regression for bug 1736
{
VERIFY_IS_APPROX(A(all, eii).col(0).eval(), A.col(eii(0)));
A(all, eii).col(0) = A.col(eii(0));
}
}
EIGEN_DECLARE_TEST(indexed_view)