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bug #1223: fix compilation of AutoDiffScalar's min/max operators, and add regression unit test.

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This commit is contained in:
Gael Guennebaud 2016-05-18 16:26:26 +02:00
parent 448d9d943c
commit 1fbfab27a9
2 changed files with 35 additions and 4 deletions
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20
unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h
View File

@ -548,13 +548,25 @@ inline const AutoDiffScalar<DerType>& real(const AutoDiffScalar<DerType>& x) {
template<typename DerType>
inline typename DerType::Scalar imag(const AutoDiffScalar<DerType>&) { return 0.; }
template<typename DerType, typename T>
inline AutoDiffScalar<DerType> (min)(const AutoDiffScalar<DerType>& x, const T& y) { return (x <= y ? x : y); }
inline AutoDiffScalar<typename Eigen::internal::remove_all<DerType>::type::PlainObject> (min)(const AutoDiffScalar<DerType>& x, const T& y) {
typedef AutoDiffScalar<typename Eigen::internal::remove_all<DerType>::type::PlainObject> ADS;
return (x <= y ? ADS(x) : ADS(y));
}
template<typename DerType, typename T>
inline AutoDiffScalar<DerType> (max)(const AutoDiffScalar<DerType>& x, const T& y) { return (x >= y ? x : y); }
inline AutoDiffScalar<typename Eigen::internal::remove_all<DerType>::type::PlainObject> (max)(const AutoDiffScalar<DerType>& x, const T& y) {
typedef AutoDiffScalar<typename Eigen::internal::remove_all<DerType>::type::PlainObject> ADS;
return (x >= y ? ADS(x) : ADS(y));
}
template<typename DerType, typename T>
inline AutoDiffScalar<DerType> (min)(const T& x, const AutoDiffScalar<DerType>& y) { return (x < y ? x : y); }
inline AutoDiffScalar<typename Eigen::internal::remove_all<DerType>::type::PlainObject> (min)(const T& x, const AutoDiffScalar<DerType>& y) {
typedef AutoDiffScalar<typename Eigen::internal::remove_all<DerType>::type::PlainObject> ADS;
return (x < y ? ADS(x) : ADS(y));
}
template<typename DerType, typename T>
inline AutoDiffScalar<DerType> (max)(const T& x, const AutoDiffScalar<DerType>& y) { return (x > y ? x : y); }
inline AutoDiffScalar<typename Eigen::internal::remove_all<DerType>::type::PlainObject> (max)(const T& x, const AutoDiffScalar<DerType>& y) {
typedef AutoDiffScalar<typename Eigen::internal::remove_all<DerType>::type::PlainObject> ADS;
return (x > y ? ADS(x) : ADS(y));
}
EIGEN_AUTODIFF_DECLARE_GLOBAL_UNARY(abs,
using std::abs;

19
unsupported/test/autodiff.cpp
View File

@ -216,6 +216,24 @@ double bug_1222() {
return denom.value();
}
double bug_1223() {
using std::min;
typedef Eigen::AutoDiffScalar<Eigen::Vector3d> AD;
const double _cv1_3 = 1.0;
const AD chi_3 = 1.0;
const AD denom = 1.0;
// failed because implementation of min attempts to construct ADS<DerType&> via constructor AutoDiffScalar(const Real& value)
// without initializing m_derivatives (which is a reference in this case)
#define EIGEN_TEST_SPACE
const AD t = min EIGEN_TEST_SPACE (denom / chi_3, 1.0);
const AD t2 = min EIGEN_TEST_SPACE (denom / (chi_3 * _cv1_3), 1.0);
return t.value() + t2.value();
}
void test_autodiff()
{
for(int i = 0; i < g_repeat; i++) {
@ -226,5 +244,6 @@ void test_autodiff()
}
bug_1222();
bug_1223();
}