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Fix assignment operator issue for latest MSVC+NVCC.

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Details are scattered across #920, #1000, #1324, #2291.

Summary: some MSVC versions have a bug that requires omitting explicit
`operator=` definitions (leads to duplicate definition errors), and
some MSVC versions require adding explicit `operator=` definitions
(otherwise implicitly deleted errors).  This mess tries to cover
all the cases encountered.

Fixes #2291.


(cherry picked from commit 9816fe59b4)
This commit is contained in:
Antonio Sanchez 2021-07-21 12:41:29 -07:00 committed by Rasmus Munk Larsen
parent c334eece44
commit c0c7b695cd
1 changed files with 6 additions and 2 deletions
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8
Eigen/src/Core/util/Macros.h
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@ -1185,8 +1185,12 @@ namespace Eigen {
#define EIGEN_USING_STD(FUNC) using std::FUNC;
#endif
#if EIGEN_COMP_MSVC_STRICT && (EIGEN_COMP_MSVC < 1900 || EIGEN_COMP_NVCC)
// for older MSVC versions, as well as 1900 && CUDA 8, using the base operator is sufficient (cf Bugs 1000, 1324)
#if EIGEN_COMP_MSVC_STRICT && (EIGEN_COMP_MSVC < 1900 || (EIGEN_COMP_MSVC == 1900 && EIGEN_COMP_NVCC))
// For older MSVC versions, as well as 1900 && CUDA 8, using the base operator is necessary,
// otherwise we get duplicate definition errors
// For later MSVC versions, we require explicit operator= definition, otherwise we get
// use of implicitly deleted operator errors.
// (cf Bugs 920, 1000, 1324, 2291)
#define EIGEN_INHERIT_ASSIGNMENT_EQUAL_OPERATOR(Derived) \
using Base::operator =;
#elif EIGEN_COMP_CLANG // workaround clang bug (see http://forum.kde.org/viewtopic.php?f=74&t=102653)