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Adds macro for checking if C++14 variable templates are supported

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Steve Bronder 2021-05-21 16:25:32 +00:00 committed by Rasmus Munk Larsen
parent 391094c507
commit 1720057023
2 changed files with 14 additions and 6 deletions
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2
Eigen/src/Core/util/IntegralConstant.h
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@ -184,7 +184,7 @@ template<int N, int DynamicKey> struct cleanup_index_type<std::integral_constant
#ifndef EIGEN_PARSED_BY_DOXYGEN #ifndef EIGEN_PARSED_BY_DOXYGEN
#if EIGEN_HAS_CXX14 #if EIGEN_HAS_CXX14_VARIABLE_TEMPLATES
template<int N> template<int N>
static const internal::FixedInt<N> fix{}; static const internal::FixedInt<N> fix{};
#else #else

8
Eigen/src/Core/util/Macros.h
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@ -637,6 +637,14 @@
#define EIGEN_COMP_CXXVER 03 #define EIGEN_COMP_CXXVER 03
#endif #endif
#ifndef EIGEN_HAS_CXX14_VARIABLE_TEMPLATES
#if defined(__cpp_variable_templates) && __cpp_variable_templates >= 201304 && EIGEN_MAX_CPP_VER>=14
#define EIGEN_HAS_CXX14_VARIABLE_TEMPLATES 1
#else
#define EIGEN_HAS_CXX14_VARIABLE_TEMPLATES 0
#endif
#endif
// The macros EIGEN_HAS_CXX?? defines a rough estimate of available c++ features // The macros EIGEN_HAS_CXX?? defines a rough estimate of available c++ features
// but in practice we should not rely on them but rather on the availabilty of // but in practice we should not rely on them but rather on the availabilty of