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

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

Memory management library

Metaprogramming library (C++11)

General utilities library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Strings library

Text processing library

Numerics library

Date and time library

Input/output library

Filesystem library (C++17)

Concurrency support library (C++11)

Execution control library (C++26)

Technical specifications

Symbols index

External libraries

 

Containers library

node-handle (C++17)

Sequence

array (C++11)

vector

vector<bool>

inplace_vector (C++26)

hive (C++26)

deque

forward_list (C++11)

list

Associative

set

multiset

map

multimap

Unordered associative

unordered_set (C++11)

unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

Adaptors

stack

queue

priority_queue

flat_set (C++23)

flat_multiset (C++23)

flat_map (C++23)

flat_multimap (C++23)

Views

span (C++20)

mdspan (C++23)

Tables

Iterator invalidation

Member function table

Non-member function table

 

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 extentsdextents dims (C++26) default_accessor aligned_accessor (C++26) 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

Member functions

extents::extents

Observers

extents::rank

extents::rank_dynamic

extents::static_extent

extents::extent

Helpers

extents::fwd-prod-of-extents

extents::rev-prod-of-extents

extents::index-cast

extents::dynamic-index

extents::dynamic-index-inv

Non-member functions

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)

Follow Lee on X/Twitter - Father, Husband, Serial builder creating AI, crypto, games & web tools. We are friends :) AI Will Come To Life!

Check out: eBank.nz (Art Generator) | Netwrck.com (AI Tools) | Text-Generator.io (AI API) | BitBank.nz (Crypto AI) | ReadingTime (Kids Reading) | RewordGame | BigMultiplayerChess | WebFiddle | How.nz | Helix AI Assistant