std::experimental::overaligned_tag, std::experimental::overaligned
From cppreference.com
                    
                                        
                    < cpp | experimental | simd
                    
                                                            
                    |   Defined in header  <experimental/simd>
  | 
||
|   template< std::size_t N > struct overaligned_tag {};  | 
(parallelism TS v2) | |
This tag type indicates that the buffer of copy_from and copy_to is aligned to N.
Template parameters
| N | - | the alignment in bytes the memory access may assume | 
See also
|    (parallelism TS v2)  | 
  flag indicating alignment of the load/store address to vector alignment  (class)  | 
|    (parallelism TS v2)  | 
  flag indicating alignment of the load/store address to element alignment  (class)  |