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bug #1222: fix compilation in AutoDiffScalar and add respective unit test

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This commit is contained in:
Gael Guennebaud 2016-05-18 16:00:11 +02:00
parent 5a71eb5985
commit 448d9d943c
2 changed files with 11 additions and 2 deletions
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2
unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h
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@ -101,7 +101,7 @@ class AutoDiffScalar
template<typename OtherDerType> template<typename OtherDerType>
AutoDiffScalar(const AutoDiffScalar<OtherDerType>& other AutoDiffScalar(const AutoDiffScalar<OtherDerType>& other
#ifndef EIGEN_PARSED_BY_DOXYGEN #ifndef EIGEN_PARSED_BY_DOXYGEN
, typename internal::enable_if<internal::is_same<Scalar,typename OtherDerType::Scalar>::value,void*>::type = 0 , typename internal::enable_if<internal::is_same<Scalar, typename internal::traits<typename internal::remove_all<OtherDerType>::type>::Scalar>::value,void*>::type = 0
#endif #endif
) )
: m_value(other.value()), m_derivatives(other.derivatives()) : m_value(other.value()), m_derivatives(other.derivatives())

11
unsupported/test/autodiff.cpp
View File

@ -207,7 +207,14 @@ void test_autodiff_hessian()
VERIFY_IS_APPROX(y.derivatives()(1).derivatives(), -std::sin(s1*s3+s2*s4)*Vector2d(s3*s4,s4*s4)); VERIFY_IS_APPROX(y.derivatives()(1).derivatives(), -std::sin(s1*s3+s2*s4)*Vector2d(s3*s4,s4*s4));
} }
double bug_1222() {
typedef Eigen::AutoDiffScalar<Eigen::Vector3d> AD;
const double _cv1_3 = 1.0;
const AD chi_3 = 1.0;
// this line did not work, because operator+ returns ADS<DerType&>, which then cannot be converted to ADS<DerType>
const AD denom = chi_3 + _cv1_3;
return denom.value();
}
void test_autodiff() void test_autodiff()
{ {
@ -217,5 +224,7 @@ void test_autodiff()
CALL_SUBTEST_3( test_autodiff_jacobian<1>() ); CALL_SUBTEST_3( test_autodiff_jacobian<1>() );
CALL_SUBTEST_4( test_autodiff_hessian<1>() ); CALL_SUBTEST_4( test_autodiff_hessian<1>() );
} }
bug_1222();
} }