std::experimental:: overaligned_tag, std::experimental:: overaligned

From cppreference.com

Defined in header `<experimental/simd>`
template < std:: size_t N > struct overaligned_tag { } ; template < std:: size_t N > inline constexpr overaligned_tag < N > overaligned { } ;		(parallelism TS v2)

This tag type indicates that the buffer of copy_from and copy_to is aligned to N.

the alignment in bytes the memory access may assume

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vector_aligned_tag vector_aligned (parallelism TS v2)	flag indicating alignment of the load/store address to vector alignment (class)
element_aligned_tag element_aligned (parallelism TS v2)	flag indicating alignment of the load/store address to element alignment (class)