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std::ranges::chunk_view<V>::size - cppreference.com

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constexpr auto size() requires ranges::sized_range<V>;

 (1) (since C++23)

constexpr auto size() const requires ranges::sized_range<const V>;

 (2) (since C++23)

Returns the number of elements, which is the smallest integer value that is not less than the quotient of dividing the size of underlying view base_ by the underlying data member n_, that holds the number passed to the constructor (0 if default constructed). Equivalent to return to-unsigned-like(div-ceil(ranges::distance(base_), n_)); .

Return value

The number of elements.

Example

#include <ranges>

int main()
{
    constexpr static auto v = {1, 2, 3, 4, 5};
    constexpr auto w{ std::ranges::chunk_view(v, 2) };
    static_assert(w.size() == (5 / 2 + (5 % 2 ? 1 : 0)));
}

See also

returns an integer equal to the size of a range
(customization point object)[edit]
returns a signed integer equal to the size of a range
(customization point object)[edit]