NAME¶

std::ranges::take_view::size - std::ranges::take_view::size

Synopsis¶

constexpr auto size() requires ranges::sized_range<V>; (1) (since C++20)
constexpr auto size() const requires ranges::sized_range<const V>; (2) (since C++20)

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 number passed to the constructor
(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¶

// Run this code

#include <ranges>
#include <iostream>

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() << ' ';
}
}

Output:¶

0 1 2 3 3 3

See also¶

ranges::size returns an integer equal to the size of a range
(C++20) (customization point object)
ranges::ssize returns a signed integer equal to the size of a range
(C++20) (customization point object)