std::ranges::take_view<V>:: size

Returns the number of elements, which is the smaller of the count passed to the constructor and the size of the underlying view.

Let base_ be the underlying view, count_ be the underlying counter (equals to ​ 0 ​ if default constructed). Equivalent to

auto n = ranges::size(base_);
return ranges::min(n, static_cast<decltype(n)>(count_));

Parameters

(none)

Return value

The number of elements.

Example

#include <iostream>
#include <ranges>
 
int main()
{
    constexpr int arr[]{1, 2, 3};
 
    for (int i = 0; i != 6; ++i)
    {
        const auto tv = std::ranges::take_view{arr, i};
        std::cout << tv.size() << ' ';
    }
    std::cout << '\n';
}

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See also