devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

Remove pre-C++14 workarounds from unsupported/ tensor code

Browse Source 
libeigen/eigen!2218

Co-authored-by: Rasmus Munk Larsen <rmlarsen@gmail.com>
This commit is contained in:
Rasmus Munk Larsen
2026-02-26 06:17:39 -08:00
parent a95440de17
commit 11eb66e1b5
5 changed files with 12 additions and 74 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
Eigen/src/Core/util/EmulateArray.h
View File

@@ -231,37 +231,20 @@ template <typename T, std::size_t N>
using array = std::array<T, N>;
namespace internal {
/* std::get is only constexpr in C++14, not yet in C++11
* - libstdc++ from version 4.7 onwards has it nevertheless,
* so use that
* - libstdc++ older versions: use _M_instance directly
* - libc++ all versions so far: use __elems_ directly
* - all other libs: use std::get to be portable, but
* this may not be constexpr
*/
#if defined(__GLIBCXX__) && __GLIBCXX__ < 20120322
#define STD_GET_ARR_HACK a._M_instance[I_]
#elif defined(_LIBCPP_VERSION)
#define STD_GET_ARR_HACK a.__elems_[I_]
#else
#define STD_GET_ARR_HACK std::template get<I_, T, N>(a)
#endif
template <std::size_t I_, class T, std::size_t N>
constexpr T& array_get(std::array<T, N>& a) {
return (T&)STD_GET_ARR_HACK;
return std::get<I_>(a);
}
template <std::size_t I_, class T, std::size_t N>
constexpr T&& array_get(std::array<T, N>&& a) {
return (T&&)STD_GET_ARR_HACK;
return std::get<I_>(std::move(a));
}
template <std::size_t I_, class T, std::size_t N>
constexpr T const& array_get(std::array<T, N> const& a) {
return (T const&)STD_GET_ARR_HACK;
return std::get<I_>(a);
}
#undef STD_GET_ARR_HACK
} // end namespace internal
} // end namespace Eigen