std::ranges::chunk_view<V>::size

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

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

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_));

Parameters

(none).

Return value

The number of elements.

Example

// https://godbolt.org/z/Ye7M7arv7
#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 == 0 ? 0 : 1)));
}

See also