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Compile- and run-time assertions for the construction of Ref<const>.

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This commit is contained in:
wilfried.karel 2023-06-14 15:49:58 +00:00 committed by Rasmus Munk Larsen
parent 59b3ef5409
commit d8f3eb87bf
4 changed files with 50 additions and 1 deletions
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18
Eigen/src/Core/Ref.h
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@ -332,6 +332,16 @@ template<typename TPlainObjectType, int Options, typename StrideType> class Ref<
: public RefBase<Ref<const TPlainObjectType, Options, StrideType> >
{
typedef internal::traits<Ref> Traits;
static constexpr bool may_map_m_object_successfully =
(StrideType::InnerStrideAtCompileTime == 0 ||
StrideType::InnerStrideAtCompileTime == 1 ||
StrideType::InnerStrideAtCompileTime == Dynamic) &&
(TPlainObjectType::IsVectorAtCompileTime ||
StrideType::OuterStrideAtCompileTime == 0 ||
StrideType::OuterStrideAtCompileTime == Dynamic ||
StrideType::OuterStrideAtCompileTime == TPlainObjectType::InnerSizeAtCompileTime ||
TPlainObjectType::InnerSizeAtCompileTime == Dynamic);
public:
typedef RefBase<Ref> Base;
@ -344,6 +354,8 @@ template<typename TPlainObjectType, int Options, typename StrideType> class Ref<
// std::cout << match_helper<Derived>::HasDirectAccess << "," << match_helper<Derived>::OuterStrideMatch << "," << match_helper<Derived>::InnerStrideMatch << "\n";
// std::cout << int(StrideType::OuterStrideAtCompileTime) << " - " << int(Derived::OuterStrideAtCompileTime) << "\n";
// std::cout << int(StrideType::InnerStrideAtCompileTime) << " - " << int(Derived::InnerStrideAtCompileTime) << "\n";
EIGEN_STATIC_ASSERT(Traits::template match<Derived>::type::value || may_map_m_object_successfully,
STORAGE_LAYOUT_DOES_NOT_MATCH);
construct(expr.derived(), typename Traits::template match<Derived>::type());
}
@ -353,6 +365,8 @@ template<typename TPlainObjectType, int Options, typename StrideType> class Ref<
template<typename OtherRef>
EIGEN_DEVICE_FUNC inline Ref(const RefBase<OtherRef>& other) {
EIGEN_STATIC_ASSERT(Traits::template match<OtherRef>::type::value || may_map_m_object_successfully,
STORAGE_LAYOUT_DOES_NOT_MATCH);
construct(other.derived(), typename Traits::template match<OtherRef>::type());
}
@ -371,7 +385,9 @@ template<typename TPlainObjectType, int Options, typename StrideType> class Ref<
EIGEN_DEVICE_FUNC void construct(const Expression& expr, internal::false_type)
{
internal::call_assignment_no_alias(m_object,expr,internal::assign_op<Scalar,Scalar>());
Base::construct(m_object);
const bool success = Base::construct(m_object);
EIGEN_ONLY_USED_FOR_DEBUG(success)
eigen_assert(success);
}
protected:

2
failtest/CMakeLists.txt
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@ -36,6 +36,8 @@ ei_add_failtest("ref_2")
ei_add_failtest("ref_3")
ei_add_failtest("ref_4")
ei_add_failtest("ref_5")
ei_add_failtest("ref_6")
ei_add_failtest("ref_7")
ei_add_failtest("swap_1")
ei_add_failtest("swap_2")

15
failtest/ref_6.cpp Normal file
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@ -0,0 +1,15 @@
#include "../Eigen/Core"
using namespace Eigen;
void call_ref(Ref<const VectorXf, 0, InnerStride<2>>) {}
int main() {
VectorXf a(10);
Map<const VectorXf, 0, InnerStride<2>> m(a.data(), 5);
#ifdef EIGEN_SHOULD_FAIL_TO_BUILD
call_ref(a);
#else
call_ref(m);
#endif
}

16
failtest/ref_7.cpp Normal file
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@ -0,0 +1,16 @@
#include "../Eigen/Core"
using namespace Eigen;
void call_ref(Ref<const Matrix3f, 0, OuterStride<2>>) {}
int main() {
MatrixXf a(6, 2);
Map<const Matrix3f, 0, OuterStride<Dynamic>> md(a.data(), OuterStride<Dynamic>(2));
Map<const Matrix3f, 0, OuterStride<2>> m2(a.data());
#ifdef EIGEN_SHOULD_FAIL_TO_BUILD
call_ref(md);
#else
call_ref(m2);
#endif
}