std::ranges::take_view<V>::size
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Ranges library
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std::ranges::take_view
take_view::size
(C++26)
Member functions
Non-member functions
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 underlying counter (equals to 0 if default constructed). Equivalent to
auto n = ranges::size (base_); return ranges::min (n, static_cast<decltype(n)>(count_));
Contents
[edit] Parameters
(none)
[edit] Return value
The number of elements.
[edit] Example
Run this code
#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'; }
Output:
0 1 2 3 3 3