std::experimental::simd_mask::size(3)

NAME
std::experimental::simd_mask::size - std::experimental::simd_mask::size

Synopsis
   static constexpr size_t size() noexcept; (parallelism TS v2)
   Returns the width (the number of values) of simd_mask<T, Abi>.

Example
   The actual output depends on target and compiler flags. // Run this code
 #include <experimental/simd>
 #include <iostream>
 namespace stdx = std::experimental;
 int main()
 {
     stdx::native_simd_mask<int> a { true };
     std::cout << a.size() << '\n';
     std::cout << popcount(a) << '\n';
 }

Possible output:
 16
 16

See also
   simd_size obtains the number of elements of a given element type and
   (parallelism TS v2) ABI tag
                        (class template)
   size returns the width / number of elements
   [static] (parallelism TS (public static member function of
   v2) std::experimental::simd<T,Abi>)