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Adds macro for checking if C++14 variable templates are supported
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@ -184,7 +184,7 @@ template<int N, int DynamicKey> struct cleanup_index_type<std::integral_constant
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#ifndef EIGEN_PARSED_BY_DOXYGEN
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#if EIGEN_HAS_CXX14
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#if EIGEN_HAS_CXX14_VARIABLE_TEMPLATES
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template<int N>
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static const internal::FixedInt<N> fix{};
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#else
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@ -637,6 +637,14 @@
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#define EIGEN_COMP_CXXVER 03
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#endif
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#ifndef EIGEN_HAS_CXX14_VARIABLE_TEMPLATES
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#if defined(__cpp_variable_templates) && __cpp_variable_templates >= 201304 && EIGEN_MAX_CPP_VER>=14
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#define EIGEN_HAS_CXX14_VARIABLE_TEMPLATES 1
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#else
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#define EIGEN_HAS_CXX14_VARIABLE_TEMPLATES 0
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#endif
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#endif
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// The macros EIGEN_HAS_CXX?? defines a rough estimate of available c++ features
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// but in practice we should not rely on them but rather on the availabilty of
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