std::ranges::common_view<V>:: end

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C++
Ranges library
Range adaptors
std::ranges::common_view
constexpr auto end ( ) requires ( ! /*simple-view*/ < V > ) ;
(1) (since C++20)
constexpr auto end ( ) const requires ranges:: range < const V > ;
(2) (since C++20)
1) Returns an iterator representing the end of the common_view , that is: Here base_ (the name is for exposition purposes only) is the underlying view.
2) Same as (1) , but V is const-qualified.

Parameters

(none)

Return value

An iterator representing the end of the underlying view.

Example

Run this code 
#include <iostream>
#include <numeric>
#include <ranges>
 
int main()
{
    constexpr int n{4};
 
    constexpr auto v1 = std::views::iota(1)
                      | std::views::take(n)
                      | std::views::common
                      ;
    constexpr auto v2 = std::views::iota(2)
                      | std::views::take(n)
                      ;
    const int product = std::inner_product(v1.begin(), v1.end(),
                                           v2.begin(),
                                           0);
    std::cout << product << '\n';
}

Output: 

40

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 4012 C++20 non-const overload missed simple-view check added

See also

returns an iterator to the beginning
(public member function)
(C++20)
returns an iterator to the beginning of a range
(customization point object)
(C++20)
returns a sentinel indicating the end of a range
(customization point object)
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