NAME¶

std::extents::rank_dynamic - std::extents::rank_dynamic

Synopsis¶

static constexpr rank_type rank_dynamic() const noexcept; (since C++23)

Returns the number of dynamic dimensions in extents.

Parameters¶

(none)

Return value¶

The number of dynamic dimensions.

Example¶

// Run this code

#include <iostream>
#include <mdspan>

int main()
{
std::extents<int, 1, 2> e1;
std::extents<int, 3, 4, std::dynamic_extent> e2(5);
std::extents<int, std::dynamic_extent, 7, std::dynamic_extent> e3(6, 8);
std::cout << e1.rank_dynamic() << ", "
<< e2.rank_dynamic() << ", "
<< e3.rank_dynamic() << '\n';
}

Output:¶

0, 1, 2

See also¶

rank returns the static rank of an extents
[static] (public static member function)
rank obtains the number of dimensions of an array type
(C++11) (class template)