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#define was defined incorrectly because the result_of function was deprecated in c++17 and removed in c++20. Also, EIGEN_COMP_MSVC (which is _MSC_VER) only affects result_of indirectly, which can cause errors.

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shrek1402 2021-01-07 10:12:25 +00:00 committed by David Tellenbach
parent 52d1dd979a
commit cb654b1c45
1 changed files with 4 additions and 5 deletions
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9
Eigen/src/Core/util/Macros.h
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@ -657,16 +657,15 @@
#endif
// Does the compiler support result_of?
// It's likely that MSVC 2013 supports result_of but I couldn't not find a good source for that,
// so let's be conservative.
// result_of was deprecated in c++17 and removed in c++ 20
#ifndef EIGEN_HAS_STD_RESULT_OF
#if EIGEN_MAX_CPP_VER>=11 && \
(__has_feature(cxx_lambdas) || (defined(__cplusplus) && __cplusplus >= 201103L) || EIGEN_COMP_MSVC >= 1900)
#if EIGEN_MAX_CPP_VER >= 11 && \
((defined(__cplusplus) && __cplusplus >= 201103L && __cplusplus < 201703L) || \
__has_feature(cxx_lambdas))
#define EIGEN_HAS_STD_RESULT_OF 1
#else
#define EIGEN_HAS_STD_RESULT_OF 0
#endif
#endif
#ifndef EIGEN_HAS_ALIGNAS
#if EIGEN_MAX_CPP_VER>=11 && EIGEN_HAS_CXX11 && \