std::ranges::take_view<V>:: end

Returns a sentinel or an iterator representing the end of the take_view . The end of the take_view is either one past the count ^th element in the underlying range, or the end of the underlying range if the latter has less than count elements.

Overload (1) does not participate in overload resolution if V is a simple view (that is, if V and const V are views with the same iterator and sentinel types).

Parameters

(none)

Return value

The result depends on the concepts satisfied by possibly const-qualified underlying view type Base , that is V for ( 1 ) or const V for ( 2 ) .

Let base_ be the underlying view.

Example

#include <iostream>
#include <iterator>
#include <list>
#include <ranges>
#include <type_traits>
namespace ranges = std::ranges;
namespace views = std::views;
 
int main()
{
    const auto list1 = {3, 1, 4, 1, 5};
    const auto seq1{list1 | views::take(4)};
    static_assert(ranges::sized_range<decltype(seq1)> and
                  ranges::random_access_range<decltype(seq1)> and
                  std::is_same_v<decltype(seq1.end()), decltype(list1.end())>);
    for (auto it = seq1.begin(); it != seq1.end(); ++it)
        std::cout << *it << ' ';
    std::cout << '\n';
 
    std::list list2{2, 7, 1, 8, 2};
    const auto seq2{list2 | views::take(4)};
    static_assert(ranges::sized_range<decltype(seq2)> and
                  not ranges::random_access_range<decltype(seq2)> and
                  std::is_same_v<decltype(seq2.end()), std::default_sentinel_t>);
    for (auto it = seq2.begin(); it != std::default_sentinel; ++it)
        std::cout << *it << ' ';
    std::cout << '\n';
}

3 1 4 1
2 7 1 8

Defect reports

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

See also