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std::full_extent, std::full_extent_t

From cppreference.com
< cpp‎ | container‎ | mdspan
 
C++
 
Containers library
 
std::mdspan
 
Defined in header <mdspan>
struct full_extent_t { explicit full_extent_t() = default; };
 (1) (since C++26)
inline constexpr std::full_extent_t full_extent {};
 (2) (since C++26)
1) The class std::full_extent_t is a slice specifier type that can be used in std::submdspan.
2) The corresponding std::full_extent instance of (1) is a slice specifier to indicate full range of indices in the specified extent in std::submdspan.

[edit] Example

Run this code
#include <mdspan>
#include <print>
 
void print(auto view)
{
    static_assert(view.rank() <= 2);
 
    if constexpr (view.rank() == 2)
    {
        for (