copy

eve::algo::copy = function_with_traits<copy_>[default_simple_algo_traits]

inlineconstexpr

#include <eve/algo/copy.hpp>

SIMD optimized copy algorithm.

Configurable Callable Object performing a SIMD optimized version of the copy. By default, the operation will be unrolled by a factor of 4, align memory accesses and perform conversions if needed.

Note

If you want to copy elements of same scalar type, use std::memmove.

Alternative Header

#include <eve/algo.hpp>

Callable Signatures

namespace eve::algo
{
  template<typename R1, typename R2>
  void copy(R1&& r1, R2&& r2) requires zip_to_range<R1, R2>;    //  1
 
  void copy(zipped_range_pair auto&& r);                        //  2
}

1. Copy the elements of from r1 to r2.
2. Copy the elements of from get<0>(r) to get<1>(r).

Parameters

• r1 : The range of elements or an iterator to the beginning of the elements to copy from
• r2 : A range or an iterator to the beginning of the destination elements
• r : An eve::algo::zipped_range_pair of ranges and/or iterators.

Example

#include <eve/algo/copy.hpp>
#include <tts/tts.hpp>
#include <iostream>
#include <vector>
 
int main()
{
  std::vector<double>  from_vector = {2.5,6.8,-10.62,3.2,-8.8,2.7,-6.66,8.5,-2.01,4.8};
  std::vector<double>  to_vector(from_vector.size());
  std::vector<double>  to_vector_z(from_vector.size());
 
  std::cout << "from_vector     = "
            << tts::as_string(from_vector)
            << "\n";
 
  eve::algo::copy(from_vector, to_vector);
 
  std::cout << "to_vector       = "
            << tts::as_string(to_vector)
            << "\n";
 
  eve::algo::copy( eve::algo::views::zip(from_vector, to_vector_z) );
 
  std::cout << "to_vector (zip) = "
            << tts::as_string(to_vector_z)
            << "\n";
 
  return 0;
}