std::experimental:: all_of, std::experimental:: any_of, std::experimental:: none_of, std::experimental:: some_of

From cppreference.com
C++
Experimental
Extensions for parallelism v2
SIMD library
Defined in header <experimental/simd>
template < class T, class Abi >
bool all_of ( const simd_mask < T, Abi > & k ) ;
(1) (parallelism TS v2)
template < class T, class Abi >
bool any_of ( const simd_mask < T, Abi > & k ) ;
(2) (parallelism TS v2)
template < class T, class Abi >
bool none_of ( const simd_mask < T, Abi > & k ) ;
(3) (parallelism TS v2)
template < class T, class Abi >
bool some_of ( const simd_mask < T, Abi > & k ) ;
(4) (parallelism TS v2)
1) Returns true if all values in k are true .
2) Returns true if at least one value in k is true .
3) Returns true if all values in k are false .
4) Returns true if at least one value in k is true but not all values in k are true .

Parameters

k - the simd_mask to apply the reduction to

Return value

The boolean result of the horizontal reduction.

Example

Run this code 
#include <cassert>
#include <experimental/simd>
 
namespace stq = std::experimental;
 
int main()
{
    using mask = stq::fixed_size_simd_mask<int, 4>;
 
    mask mask1{false}; // = {0, 0, 0, 0}
    assert
    (
        stq::none_of(mask1) == true &&
        stq::any_of(mask1) == false &&
        stq::some_of(mask1) == false &&
        stq::all_of(mask1) == false
    );
 
    mask mask2{true}; // = {1, 1, 1, 1}
    assert
    (
        stq::none_of(mask2) == false &&
        stq::any_of(mask2) == true &&
        stq::some_of(mask2) == false &&
        stq::all_of(mask2) == true
    );
 
    mask mask3{true};
    mask3[0] = mask3[1] = false; // mask3 = {0, 0, 1, 1}
    assert
    (
        stq::none_of(mask3) == false &&
        stq::any_of(mask3) == true &&
        stq::some_of(mask3) == true &&
        stq::all_of(mask3) == false
    );
}
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