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std::extents<IndexType,Extents...>::extent

From cppreference.com
< cpp‎ | container‎ | mdspan‎ | extents
 
 
 
std::mdspan
 
 
constexpr index_type extent( rank_type i ) const noexcept;
(since C++23)

Returns dynamic extent size of an extents at a certain rank index.

[edit] Parameters

i - The rank index to get the extent size of

[edit] Return value

The dynamic extent size of an extents at a certain rank index.

[edit] 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.extent(0) << ", " << e1.extent(1) << '\n';
 std::cout << e2.extent(0) << ", " << e2.extent(1) << ", " << e2.extent(2) << '\n';
}

Output:

1, 2
3, 4, 5

[edit] See also

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