NAME¶

std::extents::static_extent - std::extents::static_extent

Synopsis¶

static constexpr std::size_t static_extent( rank_type i ) noexcept; (since C++23)

Returns static extent size of an extents at the rank index i. If the rank index i is
a dynamic extent, returns std::dynamic_extent.

Parameters¶

i - The rank index to get the static extent size of

Return value¶

The static extent size or std::dynamic_extent value.

Example¶

// Run this code

#include <iostream>
#include <mdspan>

int main()
{
std::extents<int, 1, 2> e1;
std::extents<int, 3, std::dynamic_extent, std::dynamic_extent> e2(4, 5);
std::cout << e1.static_extent(0) << ", " << e1.static_extent(1) << '\n';
std::cout << (e2.static_extent(0) == std::dynamic_extent) << ", "
<< (e2.static_extent(1) == std::dynamic_extent) << ", "
<< (e2.static_extent(2) == std::dynamic_extent) << '\n';
}

Output:¶

1, 2
0, 1, 1

See also¶

extent returns dynamic extent size of an extents at a certain rank index
(public member function)
extent obtains the size of an array type along a specified dimension
(C++11) (class template)