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bug #1409: make EIGEN_MAKE_ALIGNED_OPERATOR_NEW* macros empty in c++17 mode:

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- this helps clang 5 and 6 to support alignas in STL's containers.
 - this makes the public API of our (and users) classes cleaner
This commit is contained in:
Gael Guennebaud
2019-02-20 13:52:11 +01:00
parent 3b5deeb546
commit edd413c184
3 changed files with 31 additions and 1 deletions
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13
Eigen/src/Core/util/Memory.h
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@@ -789,6 +789,17 @@ template<typename T> void swap(scoped_array<T> &a,scoped_array<T> &b)
*** Implementation of EIGEN_MAKE_ALIGNED_OPERATOR_NEW [_IF] ***
*****************************************************************************/
#if EIGEN_HAS_CXX17_OVERALIGN
// C++17 -> no need to bother about alignment anymore :)
#define EIGEN_MAKE_ALIGNED_OPERATOR_NEW_NOTHROW(NeedsToAlign)
#define EIGEN_MAKE_ALIGNED_OPERATOR_NEW_IF(NeedsToAlign)
#define EIGEN_MAKE_ALIGNED_OPERATOR_NEW
#define EIGEN_MAKE_ALIGNED_OPERATOR_NEW_IF_VECTORIZABLE_FIXED_SIZE(Scalar,Size)
#else
#if EIGEN_MAX_ALIGN_BYTES!=0
#define EIGEN_MAKE_ALIGNED_OPERATOR_NEW_NOTHROW(NeedsToAlign) \
void* operator new(std::size_t size, const std::nothrow_t&) EIGEN_NO_THROW { \
@@ -831,6 +842,8 @@ template<typename T> void swap(scoped_array<T> &a,scoped_array<T> &b)
((EIGEN_MAX_ALIGN_BYTES>=32) && ((sizeof(Scalar)*(Size))%(EIGEN_MAX_ALIGN_BYTES/2)==0)) || \
((EIGEN_MAX_ALIGN_BYTES>=64) && ((sizeof(Scalar)*(Size))%(EIGEN_MAX_ALIGN_BYTES/4)==0)) )))
#endif
/****************************************************************************/
/** \class aligned_allocator