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

 

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std::mdspan

Member functions mdspan::mdspan mdspan::operator= Element access mdspan::operator[] Observers mdspan::rank mdspan::rank_dynamic mdspan::static_extent mdspan::extent mdspan::size mdspan::empty mdspan::stride mdspan::extents mdspan::data_handle mdspan::mapping mdspan::accessor mdspan::is_uniquemdspan::is_exhaustivemdspan::is_stridedmdspan::is_always_uniquemdspan::is_always_exhaustivemdspan::is_always_strided

Non-member functions swap(std::mdspan) Subviews submdspan (C++26) submdspan_extents (C++26) Helper types and templates extentsdextentsdims (C++26) default_accessor Layout mapping policies layout_left layout_right layout_stride layout_left_padded (C++26) layout_right_padded (C++26) Subviews helpers full_extent (C++26) strided_slice (C++26) submdspan_mapping_result (C++26) Deduction guides

 

std::extents

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extents::extents

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extents::rank

extents::rank_dynamic

extents::static_extent

extents::extent

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extents::fwd-prod-of-extents

extents::rev-prod-of-extents

extents::index-cast

extents::dynamic-index

extents::dynamic-index-inv

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extents::operator==

Deduction guides

 

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 (C++11)	obtains the size of an array type along a specified dimension (class template)